refactor backend system, remove accouts flattening

Cargo.lock

@@ -1217,7 +1217,7 @@ dependencies = [
 [[package]]
 name = "email-lib"
 version = "0.21.0"
-source = "git+https://git.sr.ht/~soywod/pimalaya#ca42096c5537cf15becbb12bf0935381a1ea2908"
+source = "git+https://git.sr.ht/~soywod/pimalaya#358717d3579ffacad2bbabd9d116a292473e38ae"
 dependencies = [
  "advisory-lock",
  "anyhow",
@@ -1239,6 +1239,7 @@ dependencies = [
  "mail-parser",
  "mail-send",
  "maildirpp",
+ "md5",
  "mml-lib",
  "notify",
  "notify-rust",
@@ -1246,11 +1247,11 @@ dependencies = [
  "oauth-lib",
  "once_cell",
  "ouroboros 0.15.6",
+ "paste",
  "pgp-lib",
  "process-lib",
  "rayon",
  "regex",
- "rusqlite",
  "secret-lib",
  "serde",
  "serde-xml-rs",
@@ -1265,9 +1266,9 @@ dependencies = [
 
 [[package]]
 name = "email-macros"
-version = "0.0.1"
+version = "0.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c6354267c9a1db068b10ad982db9b8a82445f73f9bc9a57ed4924ddb913a065"
+checksum = "0f24a09fd651027f8764f8a12c12358715cb9bab622ab3125ede3dd6ae047c95"
 dependencies = [
  "quote",
  "syn 2.0.41",
@@ -2962,6 +2963,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
+
 [[package]]
 name = "pbkdf2"
 version = "0.11.0"

Cargo.toml

@@ -19,21 +19,14 @@ rustdoc-args = ["--cfg", "docsrs"]
 # features documentation:
 # https://pimalaya.org/himalaya/cli/latest/installation.html#cargo
 default = [
-  "wizard",
-
   "imap",
   "maildir",
   # "notmuch",
   "smtp",
   "sendmail",
 
-  "account",
+  "account-discovery",
-  "folder",
+  "account-sync",
-  "envelope",
-  "flag",
-  "message",
-  "attachment",
-  "template",
 
   # "pgp-commands",
   # "pgp-gpg",
@@ -46,60 +39,8 @@ notmuch = ["email-lib/notmuch"]
 smtp = ["email-lib/smtp"]
 sendmail = ["email-lib/sendmail"]
 
-wizard = ["email-lib/account-discovery"]
+account-discovery = ["email-lib/account-discovery"]
-account = ["account-configure", "account-list", "account-sync"]
+account-sync = ["email-lib/account-sync"]
-account-subcmd = []
-account-configure = ["account-subcmd"]
-account-list = ["account-subcmd"]
-account-sync = ["account-subcmd", "email-lib/account-sync"]
-
-folder = ["folder-add", "folder-list", "folder-expunge", "folder-purge", "folder-delete"]
-folder-subcmd = []
-folder-add = ["folder-subcmd", "email-lib/folder-add"]
-folder-list = ["folder-subcmd", "email-lib/folder-list"]
-folder-expunge = ["folder-subcmd", "email-lib/folder-expunge"]
-folder-purge = ["folder-subcmd", "email-lib/folder-purge"]
-folder-delete = ["folder-subcmd", "email-lib/folder-delete"]
-
-envelope = ["envelope-list", "envelope-watch", "envelope-get"]
-envelope-subcmd = []
-envelope-list = ["envelope-subcmd", "email-lib/envelope-list"]
-envelope-watch = ["envelope-subcmd", "email-lib/envelope-watch"]
-envelope-get = ["envelope-subcmd", "email-lib/envelope-get"]
-
-flag = ["flag-add", "flag-set", "flag-remove"]
-flag-subcmd = []
-flag-add = ["flag-subcmd", "email-lib/flag-add"]
-flag-set = ["flag-subcmd", "email-lib/flag-set"]
-flag-remove = ["flag-subcmd", "email-lib/flag-remove"]
-
-message = ["message-read", "message-write", "message-mailto", "message-reply", "message-forward", "message-save", "message-send", "message-copy", "message-move", "message-delete"]
-message-subcmd = []
-message-add = ["email-lib/message-add"]
-message-peek = ["email-lib/message-peek"]
-message-get = ["email-lib/message-get"]
-message-copy = ["message-subcmd", "email-lib/message-copy"]
-message-move = ["message-subcmd", "email-lib/message-move"]
-message-delete = ["message-subcmd", "email-lib/message-delete"]
-message-read = ["message-add", "message-peek", "message-get"]
-message-write = ["message-add", "message-send"]
-message-mailto = ["message-add", "message-send"]
-message-reply = ["message-get", "message-add", "message-send"]
-message-forward = ["message-get", "message-add", "message-send"]
-message-save = ["message-add"]
-message-send = ["message-subcmd", "email-lib/message-send"]
-
-attachment = ["attachment-download"]
-attachment-subcmd = []
-attachment-download = ["attachment-subcmd", "message-read"]
-
-template = ["template-write", "template-reply", "template-forward", "template-save", "template-send"]
-template-subcmd = []
-template-write = ["template-subcmd"]
-template-reply = ["template-subcmd", "email-lib/message-get"]
-template-forward = ["template-subcmd", "email-lib/message-get"]
-template-save = ["template-subcmd", "email-lib/message-add"]
-template-send = ["template-subcmd", "email-lib/message-send"]
 
 pgp = []
 pgp-commands = ["email-lib/pgp-commands", "mml-lib/pgp-commands", "pgp"]
@@ -120,8 +61,7 @@ clap_mangen = "0.2"
 console = "0.15.2"
 dialoguer = "0.10.2"
 dirs = "4.0"
-# email-lib = { version = "=0.21.0", default-features = false }
+email-lib = { version = "=0.21.0", default-features = false }
-email-lib = { git = "https://git.sr.ht/~soywod/pimalaya", default-features = false }
 email_address = "0.2.4"
 env_logger = "0.8"
 erased-serde = "0.3"
@@ -157,3 +97,6 @@ features = ["bundled"]
 
 [target.'cfg(not(windows))'.dependencies.coredump]
 version = "0.1"
+
+[patch.crates-io]
+email-lib = { git = "https://git.sr.ht/~soywod/pimalaya" }

src/account/command/mod.rs

@@ -1,6 +1,4 @@
-#[cfg(feature = "account-configure")]
 mod configure;
-#[cfg(feature = "account-list")]
 mod list;
 #[cfg(feature = "account-sync")]
 mod sync;
@@ -10,12 +8,9 @@ use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "account-configure")]
-use self::configure::AccountConfigureCommand;
-#[cfg(feature = "account-list")]
-use self::list::AccountListCommand;
 #[cfg(feature = "account-sync")]
 use self::sync::AccountSyncCommand;
+use self::{configure::AccountConfigureCommand, list::AccountListCommand};
 
 /// Manage accounts.
 ///
@@ -24,11 +19,9 @@ use self::sync::AccountSyncCommand;
 /// file. This subcommand allows you to manage them.
 #[derive(Debug, Subcommand)]
 pub enum AccountSubcommand {
-    #[cfg(feature = "account-configure")]
     #[command(alias = "cfg")]
     Configure(AccountConfigureCommand),
 
-    #[cfg(feature = "account-list")]
     #[command(alias = "lst")]
     List(AccountListCommand),
 
@@ -41,9 +34,7 @@ impl AccountSubcommand {
     #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "account-configure")]
             Self::Configure(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "account-list")]
             Self::List(cmd) => cmd.execute(printer, config).await,
             #[cfg(feature = "account-sync")]
             Self::Sync(cmd) => cmd.execute(printer, config).await,

src/account/command/sync.rs

@@ -8,25 +8,22 @@ use anyhow::Result;
 use clap::{ArgAction, Parser};
 #[cfg(feature = "imap")]
 use email::imap::ImapContextBuilder;
-#[cfg(feature = "account-sync")]
 use email::maildir::config::MaildirConfig;
 #[cfg(feature = "maildir")]
 use email::maildir::MaildirContextBuilder;
 #[cfg(feature = "notmuch")]
 use email::notmuch::NotmuchContextBuilder;
 use email::{
-    account::{
+    account::{config::AccountConfig, sync::AccountSyncBuilder},
-        config::AccountConfig,
-        sync::{AccountSyncBuilder, AccountSyncProgressEvent},
-    },
     backend::BackendBuilder,
-    folder::sync::FolderSyncStrategy,
+    folder::sync::config::FolderSyncStrategy,
+    sync::SyncEvent,
 };
 use indicatif::{MultiProgress, ProgressBar, ProgressFinish, ProgressStyle};
 use log::info;
 use once_cell::sync::Lazy;
 use std::{
-    collections::{HashMap, HashSet},
+    collections::{BTreeSet, HashMap},
     ops::Deref,
     sync::{Arc, Mutex},
 };
@@ -96,8 +93,8 @@ impl AccountSyncCommand {
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         info!("executing sync account command");
 
-        let included_folders = HashSet::from_iter(self.include_folder);
+        let included_folders = BTreeSet::from_iter(self.include_folder);
-        let excluded_folders = HashSet::from_iter(self.exclude_folder);
+        let excluded_folders = BTreeSet::from_iter(self.exclude_folder);
 
         let strategy = if !included_folders.is_empty() {
             Some(FolderSyncStrategy::Include(included_folders))
@@ -116,26 +113,25 @@ impl AccountSyncCommand {
 
         let backend_builder =
             AccountSyncBackendBuilder::new(toml_account_config, account_config.clone()).await?;
-        let sync_builder = AccountSyncBuilder::new(account_config.clone(), backend_builder.into())
+        let sync_builder = AccountSyncBuilder::new(backend_builder.into())?
-            .await?
+            .with_dry_run(self.dry_run)
-            .with_some_folders_strategy(strategy)
+            .with_some_folders_filter(strategy);
-            .with_dry_run(self.dry_run);
 
         if self.dry_run {
             let report = sync_builder.sync().await?;
-            let mut hunks_count = report.folders_patch.len();
+            let mut hunks_count = report.folder.patch.len();
 
-            if !report.folders_patch.is_empty() {
+            if !report.folder.patch.is_empty() {
                 printer.print_log("Folders patch:")?;
-                for (hunk, _) in report.folders_patch {
+                for (hunk, _) in report.folder.patch {
                     printer.print_log(format!(" - {hunk}"))?;
                 }
                 printer.print_log("")?;
             }
 
-            if !report.emails_patch.is_empty() {
+            if !report.email.patch.is_empty() {
                 printer.print_log("Envelopes patch:")?;
-                for (hunk, _) in report.emails_patch {
+                for (hunk, _) in report.email.patch {
                     hunks_count += 1;
                     printer.print_log(format!(" - {hunk}"))?;
                 }
@@ -154,27 +150,27 @@ impl AccountSyncCommand {
             let main_progress = multi.add(
                 ProgressBar::new(100)
                     .with_style(MAIN_PROGRESS_STYLE.clone())
-                    .with_message("Synchronizing folders…"),
+                    .with_message("Listing folders…"),
             );
 
-            // Force the progress bar to show
+            main_progress.tick();
-            main_progress.set_position(0);
 
             let report = sync_builder
-                .with_on_progress(move |evt| {
+                .with_handler(move |evt| {
-                    use AccountSyncProgressEvent::*;
                     match evt {
-                        ApplyFolderPatches(..) => {
+                        SyncEvent::ListedAllFolders => {
-                            main_progress.inc(3);
+                            main_progress.set_message("Synchronizing folders…");
                         }
-                        ApplyEnvelopePatches(patches) => {
+                        SyncEvent::ProcessedAllFolderHunks => {
-                            let mut envelopes_progresses = sub_progresses.lock().unwrap();
+                            main_progress.set_message("Listing envelopes…");
-                            let patches_len =
+                        }
-                                patches.values().fold(0, |sum, patch| sum + patch.len());
+                        SyncEvent::GeneratedEmailPatch(patches) => {
-                            main_progress.set_length((110 * patches_len / 100) as u64);
+                            let patches_len = patches.values().flatten().count();
-                            main_progress.set_position((5 * patches_len / 100) as u64);
+                            main_progress.set_length(patches_len as u64);
-                            main_progress.set_message("Synchronizing envelopes…");
+                            main_progress.set_position(0);
+                            main_progress.set_message("Synchronizing emails…");
 
+                            let mut envelopes_progresses = sub_progresses.lock().unwrap();
                             for (folder, patch) in patches {
                                 let progress = ProgressBar::new(patch.len() as u64)
                                     .with_style(SUB_PROGRESS_STYLE.clone())
@@ -184,7 +180,7 @@ impl AccountSyncCommand {
                                 envelopes_progresses.insert(folder, progress.clone());
                             }
                         }
-                        ApplyEnvelopeHunk(hunk) => {
+                        SyncEvent::ProcessedEmailHunk(hunk) => {
                             main_progress.inc(1);
                             let mut progresses = sub_progresses.lock().unwrap();
                             if let Some(progress) = progresses.get_mut(hunk.folder()) {
@@ -196,31 +192,33 @@ impl AccountSyncCommand {
                                 }
                             }
                         }
-                        ApplyEnvelopeCachePatch(_patch) => {
+                        SyncEvent::ProcessedAllEmailHunks => {
-                            main_progress.set_length(100);
-                            main_progress.set_position(95);
-                            main_progress.set_message("Saving cache database…");
-                        }
-                        ExpungeFolders(folders) => {
                             let mut progresses = sub_progresses.lock().unwrap();
                             for progress in progresses.values() {
                                 progress.finish_and_clear()
                             }
                             progresses.clear();
 
+                            main_progress.set_length(100);
                             main_progress.set_position(100);
-                            main_progress
+                            main_progress.set_message("Expunging folders…");
-                                .set_message(format!("Expunging {} folders…", folders.len()));
+                        }
+                        SyncEvent::ExpungedAllFolders => {
+                            main_progress.finish_and_clear();
+                        }
+                        _ => {
+                            main_progress.tick();
                         }
-                        _ => (),
                     };
-                    Ok(())
+
+                    async { Ok(()) }
                 })
                 .sync()
                 .await?;
 
             let folders_patch_err = report
-                .folders_patch
+                .folder
+                .patch
                 .iter()
                 .filter_map(|(hunk, err)| err.as_ref().map(|err| (hunk, err)))
                 .collect::<Vec<_>>();
@@ -232,15 +230,9 @@ impl AccountSyncCommand {
                     .try_for_each(|(hunk, err)| printer.print_log(format!(" - {hunk}: {err}")))?;
             }
 
-            if let Some(err) = report.folders_cache_patch.1 {
-                printer.print_log("")?;
-                printer.print_log(format!(
-                    "Error occurred while applying the folder cache patch: {err}"
-                ))?;
-            }
-
             let envelopes_patch_err = report
-                .emails_patch
+                .email
+                .patch
                 .iter()
                 .filter_map(|(hunk, err)| err.as_ref().map(|err| (hunk, err)))
                 .collect::<Vec<_>>();
@@ -252,13 +244,6 @@ impl AccountSyncCommand {
                 }
             }
 
-            if let Some(err) = report.emails_cache_patch.1 {
-                printer.print_log("")?;
-                printer.print_log(format!(
-                    "Error occurred while applying the envelopes cache patch: {err}"
-                ))?;
-            }
-
             printer.print(format!("Account {account_name} successfully synchronized!"))?;
         }
 
@@ -283,7 +268,6 @@ impl AccountSyncBackendBuilder {
         let is_imap_used = used_backends.contains(&BackendKind::Imap);
         #[cfg(feature = "maildir")]
         let is_maildir_used = used_backends.contains(&BackendKind::Maildir);
-        #[cfg(feature = "account-sync")]
         let is_maildir_for_sync_used = used_backends.contains(&BackendKind::MaildirForSync);
         #[cfg(feature = "notmuch")]
         let is_notmuch_used = used_backends.contains(&BackendKind::Notmuch);
@@ -300,7 +284,10 @@ impl AccountSyncBackendBuilder {
                     .filter(|_| is_imap_used)
                     .map(Clone::clone)
                     .map(Arc::new)
-                    .map(|config| ImapContextBuilder::new(config).with_prebuilt_credentials());
+                    .map(|config| {
+                        ImapContextBuilder::new(account_config.clone(), config)
+                            .with_prebuilt_credentials()
+                    });
                 match builder {
                     Some(builder) => Some(builder.await?),
                     None => None,
@@ -314,15 +301,14 @@ impl AccountSyncBackendBuilder {
                 .filter(|_| is_maildir_used)
                 .map(Clone::clone)
                 .map(Arc::new)
-                .map(MaildirContextBuilder::new),
+                .map(|mdir_config| MaildirContextBuilder::new(account_config.clone(), mdir_config)),
 
-            #[cfg(feature = "account-sync")]
             maildir_for_sync: Some(MaildirConfig {
                 root_dir: account_config.get_sync_dir()?,
             })
             .filter(|_| is_maildir_for_sync_used)
             .map(Arc::new)
-            .map(MaildirContextBuilder::new),
+            .map(|mdir_config| MaildirContextBuilder::new(account_config.clone(), mdir_config)),
 
             #[cfg(feature = "notmuch")]
             notmuch: toml_account_config
@@ -331,7 +317,9 @@ impl AccountSyncBackendBuilder {
                 .filter(|_| is_notmuch_used)
                 .map(Clone::clone)
                 .map(Arc::new)
-                .map(NotmuchContextBuilder::new),
+                .map(|notmuch_config| {
+                    NotmuchContextBuilder::new(account_config.clone(), notmuch_config)
+                }),
 
             #[cfg(feature = "smtp")]
             smtp: None,

src/account/config.rs

@@ -60,7 +60,6 @@ pub struct TomlAccountConfig {
 }
 
 impl TomlAccountConfig {
-    #[cfg(any(feature = "account-sync", feature = "folder-add"))]
     pub fn add_folder_kind(&self) -> Option<&BackendKind> {
         self.folder
             .as_ref()
@@ -69,7 +68,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "folder-list"))]
     pub fn list_folders_kind(&self) -> Option<&BackendKind> {
         self.folder
             .as_ref()
@@ -78,7 +76,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
     pub fn expunge_folder_kind(&self) -> Option<&BackendKind> {
         self.folder
             .as_ref()
@@ -87,7 +84,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(feature = "folder-purge")]
     pub fn purge_folder_kind(&self) -> Option<&BackendKind> {
         self.folder
             .as_ref()
@@ -96,7 +92,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "folder-delete"))]
     pub fn delete_folder_kind(&self) -> Option<&BackendKind> {
         self.folder
             .as_ref()
@@ -105,7 +100,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "envelope-get"))]
     pub fn get_envelope_kind(&self) -> Option<&BackendKind> {
         self.envelope
             .as_ref()
@@ -114,7 +108,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "envelope-list"))]
     pub fn list_envelopes_kind(&self) -> Option<&BackendKind> {
         self.envelope
             .as_ref()
@@ -123,7 +116,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(feature = "envelope-watch")]
     pub fn watch_envelopes_kind(&self) -> Option<&BackendKind> {
         self.envelope
             .as_ref()
@@ -132,7 +124,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-add"))]
     pub fn add_flags_kind(&self) -> Option<&BackendKind> {
         self.flag
             .as_ref()
@@ -141,7 +132,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-set"))]
     pub fn set_flags_kind(&self) -> Option<&BackendKind> {
         self.flag
             .as_ref()
@@ -150,7 +140,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(feature = "flag-remove")]
     pub fn remove_flags_kind(&self) -> Option<&BackendKind> {
         self.flag
             .as_ref()
@@ -159,7 +148,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-add"))]
     pub fn add_message_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -168,7 +156,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-peek"))]
     pub fn peek_messages_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -177,7 +164,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-get"))]
     pub fn get_messages_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -186,7 +172,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(feature = "message-copy")]
     pub fn copy_messages_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -195,7 +180,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-move"))]
     pub fn move_messages_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -204,7 +188,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(feature = "message-delete")]
     pub fn delete_messages_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -213,7 +196,6 @@ impl TomlAccountConfig {
             .or(self.backend.as_ref())
     }
 
-    #[cfg(any(feature = "message-send", feature = "template-send"))]
     pub fn send_message_kind(&self) -> Option<&BackendKind> {
         self.message
             .as_ref()
@@ -233,17 +215,14 @@ impl TomlAccountConfig {
             used_backends.extend(folder.get_used_backends());
         }
 
-        #[cfg(feature = "envelope-subcmd")]
         if let Some(ref envelope) = self.envelope {
             used_backends.extend(envelope.get_used_backends());
         }
 
-        #[cfg(feature = "flag-subcmd")]
         if let Some(ref flag) = self.flag {
             used_backends.extend(flag.get_used_backends());
         }
 
-        #[cfg(feature = "message-subcmd")]
         if let Some(ref msg) = self.message {
             used_backends.extend(msg.get_used_backends());
         }

src/account/mod.rs

@@ -1,7 +1,6 @@
 pub mod arg;
 pub mod command;
 pub mod config;
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;
 
 use anyhow::Result;

src/account/wizard.rs

@@ -1,21 +1,20 @@
-use std::str::FromStr;
-
 use anyhow::{bail, Result};
 #[cfg(feature = "account-sync")]
-use dialoguer::Confirm;
+use dialoguer::{Confirm, Input};
-use dialoguer::Input;
 use email::account;
 #[cfg(feature = "account-sync")]
 use email::account::sync::config::SyncConfig;
 use email_address::EmailAddress;
+use std::str::FromStr;
 
-#[allow(unused)]
-use crate::backend::{self, config::BackendConfig, BackendKind};
-#[cfg(feature = "message-send")]
-use crate::message::config::{MessageConfig, MessageSendConfig};
 #[cfg(feature = "account-sync")]
 use crate::wizard_prompt;
-use crate::{ui::THEME, wizard_warn};
+use crate::{
+    backend::{self, config::BackendConfig, BackendKind},
+    message::config::{MessageConfig, MessageSendConfig},
+    ui::THEME,
+    wizard_warn,
+};
 
 use super::TomlAccountConfig;
 
@@ -95,9 +94,6 @@ pub(crate) async fn configure() -> Result<Option<(String, TomlAccountConfig)>> {
         #[cfg(feature = "smtp")]
         Some(BackendConfig::Smtp(smtp_config)) => {
             config.smtp = Some(smtp_config);
-
-            #[cfg(feature = "message-send")]
-            {
             config.message = Some(MessageConfig {
                 send: Some(MessageSendConfig {
                     backend: Some(BackendKind::Smtp),
@@ -106,13 +102,9 @@ pub(crate) async fn configure() -> Result<Option<(String, TomlAccountConfig)>> {
                 ..Default::default()
             });
         }
-        }
         #[cfg(feature = "sendmail")]
         Some(BackendConfig::Sendmail(sendmail_config)) => {
             config.sendmail = Some(sendmail_config);
-
-            #[cfg(feature = "message-send")]
-            {
             config.message = Some(MessageConfig {
                 send: Some(MessageSendConfig {
                     backend: Some(BackendKind::Sendmail),
@@ -121,7 +113,6 @@ pub(crate) async fn configure() -> Result<Option<(String, TomlAccountConfig)>> {
                 ..Default::default()
             });
         }
-        }
         _ => (),
     };
 

src/backend/mod.rs

@@ -1,53 +1,16 @@
 pub mod config;
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;
 
 use anyhow::Result;
 use async_trait::async_trait;
 use std::{ops::Deref, sync::Arc};
 
-#[cfg(any(feature = "account-sync", feature = "envelope-get"))]
-use email::envelope::get::GetEnvelope;
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
-use email::envelope::list::ListEnvelopes;
-#[cfg(feature = "envelope-watch")]
-use email::envelope::watch::WatchEnvelopes;
-#[cfg(any(feature = "account-sync", feature = "flag-add"))]
-use email::flag::add::AddFlags;
-#[cfg(feature = "flag-remove")]
-use email::flag::remove::RemoveFlags;
-#[cfg(any(feature = "account-sync", feature = "flag-set"))]
-use email::flag::set::SetFlags;
-#[cfg(any(feature = "account-sync", feature = "folder-add"))]
-use email::folder::add::AddFolder;
-#[cfg(any(feature = "account-sync", feature = "folder-delete"))]
-use email::folder::delete::DeleteFolder;
-#[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
-use email::folder::expunge::ExpungeFolder;
-#[cfg(any(feature = "account-sync", feature = "folder-list"))]
-use email::folder::list::ListFolders;
-#[cfg(feature = "folder-purge")]
-use email::folder::purge::PurgeFolder;
 #[cfg(feature = "imap")]
 use email::imap::{ImapContextBuilder, ImapContextSync};
 #[cfg(feature = "account-sync")]
 use email::maildir::config::MaildirConfig;
 #[cfg(any(feature = "account-sync", feature = "maildir"))]
 use email::maildir::{MaildirContextBuilder, MaildirContextSync};
-#[cfg(any(feature = "account-sync", feature = "message-add"))]
-use email::message::add::AddMessage;
-#[cfg(feature = "message-copy")]
-use email::message::copy::CopyMessages;
-#[cfg(feature = "message-delete")]
-use email::message::delete::DeleteMessages;
-#[cfg(any(feature = "account-sync", feature = "message-get"))]
-use email::message::get::GetMessages;
-#[cfg(any(feature = "account-sync", feature = "message-peek"))]
-use email::message::peek::PeekMessages;
-#[cfg(any(feature = "account-sync", feature = "message-move"))]
-use email::message::r#move::MoveMessages;
-#[cfg(feature = "message-send")]
-use email::message::send::SendMessage;
 #[cfg(feature = "notmuch")]
 use email::notmuch::{NotmuchContextBuilder, NotmuchContextSync};
 #[cfg(feature = "sendmail")]
@@ -57,17 +20,22 @@ use email::smtp::{SmtpContextBuilder, SmtpContextSync};
 use email::{
     account::config::AccountConfig,
     backend::{
-        macros::BackendContext, BackendFeatureBuilder, FindBackendSubcontext, MapBackendFeature,
+        feature::BackendFeature, macros::BackendContext, mapper::SomeBackendContextBuilderMapper,
+    },
+    envelope::{get::GetEnvelope, list::ListEnvelopes, watch::WatchEnvelopes, Id, SingleId},
+    flag::{add::AddFlags, remove::RemoveFlags, set::SetFlags, Flag, Flags},
+    folder::{
+        add::AddFolder, delete::DeleteFolder, expunge::ExpungeFolder, list::ListFolders,
+        purge::PurgeFolder,
+    },
+    message::{
+        add::AddMessage, copy::CopyMessages, delete::DeleteMessages, get::GetMessages,
+        peek::PeekMessages, r#move::MoveMessages, send::SendMessage, Messages,
     },
-    envelope::{Id, SingleId},
-    flag::{Flag, Flags},
-    message::Messages,
 };
 use serde::{Deserialize, Serialize};
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
+use crate::{account::config::TomlAccountConfig, cache::IdMapper, envelope::Envelopes};
-use crate::envelope::Envelopes;
-use crate::{account::config::TomlAccountConfig, cache::IdMapper};
 
 #[derive(Clone, Debug, Eq, Hash, PartialEq, Serialize, Deserialize)]
 #[serde(rename_all = "kebab-case")]
@@ -152,7 +120,10 @@ impl BackendContextBuilder {
                     .filter(|_| kinds.contains(&&BackendKind::Imap))
                     .map(Clone::clone)
                     .map(Arc::new)
-                    .map(|config| ImapContextBuilder::new(config).with_prebuilt_credentials());
+                    .map(|imap_config| {
+                        ImapContextBuilder::new(account_config.clone(), imap_config)
+                            .with_prebuilt_credentials()
+                    });
                 match builder {
                     Some(builder) => Some(builder.await?),
                     None => None,
@@ -166,7 +137,7 @@ impl BackendContextBuilder {
                 .filter(|_| kinds.contains(&&BackendKind::Maildir))
                 .map(Clone::clone)
                 .map(Arc::new)
-                .map(MaildirContextBuilder::new),
+                .map(|mdir_config| MaildirContextBuilder::new(account_config.clone(), mdir_config)),
 
             #[cfg(feature = "account-sync")]
             maildir_for_sync: Some(MaildirConfig {
@@ -174,7 +145,7 @@ impl BackendContextBuilder {
             })
             .filter(|_| kinds.contains(&&BackendKind::MaildirForSync))
             .map(Arc::new)
-            .map(MaildirContextBuilder::new),
+            .map(|mdir_config| MaildirContextBuilder::new(account_config.clone(), mdir_config)),
 
             #[cfg(feature = "notmuch")]
             notmuch: toml_account_config
@@ -183,7 +154,9 @@ impl BackendContextBuilder {
                 .filter(|_| kinds.contains(&&BackendKind::Notmuch))
                 .map(Clone::clone)
                 .map(Arc::new)
-                .map(NotmuchContextBuilder::new),
+                .map(|notmuch_config| {
+                    NotmuchContextBuilder::new(account_config.clone(), notmuch_config)
+                }),
 
             #[cfg(feature = "smtp")]
             smtp: toml_account_config
@@ -192,7 +165,7 @@ impl BackendContextBuilder {
                 .filter(|_| kinds.contains(&&BackendKind::Smtp))
                 .map(Clone::clone)
                 .map(Arc::new)
-                .map(SmtpContextBuilder::new),
+                .map(|smtp_config| SmtpContextBuilder::new(account_config.clone(), smtp_config)),
 
             #[cfg(feature = "sendmail")]
             sendmail: toml_account_config
@@ -201,363 +174,347 @@ impl BackendContextBuilder {
                 .filter(|_| kinds.contains(&&BackendKind::Sendmail))
                 .map(Clone::clone)
                 .map(Arc::new)
-                .map(SendmailContextBuilder::new),
+                .map(|sendmail_config| {
+                    SendmailContextBuilder::new(account_config.clone(), sendmail_config)
+                }),
         })
     }
 }
 
 #[async_trait]
-impl email::backend::BackendContextBuilder for BackendContextBuilder {
+impl email::backend::context::BackendContextBuilder for BackendContextBuilder {
     type Context = BackendContext;
 
-    #[cfg(any(feature = "account-sync", feature = "folder-add"))]
+    fn add_folder(&self) -> Option<BackendFeature<Self::Context, dyn AddFolder>> {
-    fn add_folder(&self) -> BackendFeatureBuilder<Self::Context, dyn AddFolder> {
         match self.toml_account_config.add_folder_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.add_folder_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.add_folder_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.add_folder_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.add_folder_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.add_folder()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.add_folder_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.add_folder_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "folder-list"))]
+    fn list_folders(&self) -> Option<BackendFeature<Self::Context, dyn ListFolders>> {
-    fn list_folders(&self) -> BackendFeatureBuilder<Self::Context, dyn ListFolders> {
         match self.toml_account_config.list_folders_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.list_folders_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.list_folders_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.list_folders_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.list_folders_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.list_folders()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.list_folders_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.list_folders_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
+    fn expunge_folder(&self) -> Option<BackendFeature<Self::Context, dyn ExpungeFolder>> {
-    fn expunge_folder(&self) -> BackendFeatureBuilder<Self::Context, dyn ExpungeFolder> {
         match self.toml_account_config.expunge_folder_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.expunge_folder_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.expunge_folder_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.expunge_folder_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.expunge_folder_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.expunge_folder()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.expunge_folder_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.expunge_folder_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(feature = "folder-purge")]
+    fn purge_folder(&self) -> Option<BackendFeature<Self::Context, dyn PurgeFolder>> {
-    fn purge_folder(&self) -> BackendFeatureBuilder<Self::Context, dyn PurgeFolder> {
         match self.toml_account_config.purge_folder_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.purge_folder_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.purge_folder_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.purge_folder_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.purge_folder_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.purge_folder()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.purge_folder_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.purge_folder_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "folder-delete"))]
+    fn delete_folder(&self) -> Option<BackendFeature<Self::Context, dyn DeleteFolder>> {
-    fn delete_folder(&self) -> BackendFeatureBuilder<Self::Context, dyn DeleteFolder> {
         match self.toml_account_config.delete_folder_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.delete_folder_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.delete_folder_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.delete_folder_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.delete_folder_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.delete_folder()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.delete_folder_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.delete_folder_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "envelope-list"))]
+    fn get_envelope(&self) -> Option<BackendFeature<Self::Context, dyn GetEnvelope>> {
-    fn list_envelopes(&self) -> BackendFeatureBuilder<Self::Context, dyn ListEnvelopes> {
-        match self.toml_account_config.list_envelopes_kind() {
-            #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.list_envelopes_from(self.imap.as_ref()),
-            #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.list_envelopes_from(self.maildir.as_ref()),
-            #[cfg(feature = "account-sync")]
-            Some(BackendKind::MaildirForSync) => {
-                let f = self.maildir_for_sync.as_ref()?.list_envelopes()?;
-                Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
-            }
-            #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.list_envelopes_from(self.notmuch.as_ref()),
-            _ => None,
-        }
-    }
-
-    #[cfg(feature = "envelope-watch")]
-    fn watch_envelopes(&self) -> BackendFeatureBuilder<Self::Context, dyn WatchEnvelopes> {
-        match self.toml_account_config.watch_envelopes_kind() {
-            #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.watch_envelopes_from(self.imap.as_ref()),
-            #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.watch_envelopes_from(self.maildir.as_ref()),
-            #[cfg(feature = "account-sync")]
-            Some(BackendKind::MaildirForSync) => {
-                let f = self.maildir_for_sync.as_ref()?.watch_envelopes()?;
-                Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
-            }
-            #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.watch_envelopes_from(self.notmuch.as_ref()),
-            _ => None,
-        }
-    }
-
-    #[cfg(any(feature = "account-sync", feature = "envelope-get"))]
-    fn get_envelope(&self) -> BackendFeatureBuilder<Self::Context, dyn GetEnvelope> {
         match self.toml_account_config.get_envelope_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.get_envelope_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.get_envelope_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.get_envelope_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.get_envelope_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.get_envelope()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.get_envelope_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.get_envelope_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-add"))]
+    fn list_envelopes(&self) -> Option<BackendFeature<Self::Context, dyn ListEnvelopes>> {
-    fn add_flags(&self) -> BackendFeatureBuilder<Self::Context, dyn AddFlags> {
+        match self.toml_account_config.list_envelopes_kind() {
+            #[cfg(feature = "imap")]
+            Some(BackendKind::Imap) => self.list_envelopes_with_some(&self.imap),
+            #[cfg(feature = "maildir")]
+            Some(BackendKind::Maildir) => self.list_envelopes_with_some(&self.maildir),
+            #[cfg(feature = "account-sync")]
+            Some(BackendKind::MaildirForSync) => {
+                let f = self.maildir_for_sync.as_ref()?.list_envelopes()?;
+                Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
+            }
+            #[cfg(feature = "notmuch")]
+            Some(BackendKind::Notmuch) => self.list_envelopes_with_some(&self.notmuch),
+            _ => None,
+        }
+    }
+
+    fn watch_envelopes(&self) -> Option<BackendFeature<Self::Context, dyn WatchEnvelopes>> {
+        match self.toml_account_config.watch_envelopes_kind() {
+            #[cfg(feature = "imap")]
+            Some(BackendKind::Imap) => self.watch_envelopes_with_some(&self.imap),
+            #[cfg(feature = "maildir")]
+            Some(BackendKind::Maildir) => self.watch_envelopes_with_some(&self.maildir),
+            #[cfg(feature = "account-sync")]
+            Some(BackendKind::MaildirForSync) => {
+                let f = self.maildir_for_sync.as_ref()?.watch_envelopes()?;
+                Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
+            }
+            #[cfg(feature = "notmuch")]
+            Some(BackendKind::Notmuch) => self.watch_envelopes_with_some(&self.notmuch),
+            _ => None,
+        }
+    }
+
+    fn add_flags(&self) -> Option<BackendFeature<Self::Context, dyn AddFlags>> {
         match self.toml_account_config.add_flags_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.add_flags_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.add_flags_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.add_flags_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.add_flags_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.add_flags()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.add_flags_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.add_flags_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-set"))]
+    fn set_flags(&self) -> Option<BackendFeature<Self::Context, dyn SetFlags>> {
-    fn set_flags(&self) -> BackendFeatureBuilder<Self::Context, dyn SetFlags> {
         match self.toml_account_config.set_flags_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.set_flags_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.set_flags_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.set_flags_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.set_flags_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.set_flags()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.set_flags_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.set_flags_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(feature = "flag-remove")]
+    fn remove_flags(&self) -> Option<BackendFeature<Self::Context, dyn RemoveFlags>> {
-    fn remove_flags(&self) -> BackendFeatureBuilder<Self::Context, dyn RemoveFlags> {
         match self.toml_account_config.remove_flags_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.remove_flags_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.remove_flags_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.remove_flags_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.remove_flags_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.remove_flags()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.remove_flags_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.remove_flags_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-add"))]
+    fn add_message(&self) -> Option<BackendFeature<Self::Context, dyn AddMessage>> {
-    fn add_message(&self) -> BackendFeatureBuilder<Self::Context, dyn AddMessage> {
         match self.toml_account_config.add_message_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.add_message_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.add_message_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.add_message_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.add_message_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.add_message()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.add_message_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.add_message_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(feature = "message-send")]
+    fn send_message(&self) -> Option<BackendFeature<Self::Context, dyn SendMessage>> {
-    fn send_message(&self) -> BackendFeatureBuilder<Self::Context, dyn SendMessage> {
         match self.toml_account_config.send_message_kind() {
             #[cfg(feature = "smtp")]
-            Some(BackendKind::Smtp) => self.send_message_from(self.smtp.as_ref()),
+            Some(BackendKind::Smtp) => self.send_message_with_some(&self.smtp),
             #[cfg(feature = "sendmail")]
-            Some(BackendKind::Sendmail) => self.send_message_from(self.sendmail.as_ref()),
+            Some(BackendKind::Sendmail) => self.send_message_with_some(&self.sendmail),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-peek"))]
+    fn peek_messages(&self) -> Option<BackendFeature<Self::Context, dyn PeekMessages>> {
-    fn peek_messages(&self) -> BackendFeatureBuilder<Self::Context, dyn PeekMessages> {
         match self.toml_account_config.peek_messages_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.peek_messages_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.peek_messages_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.peek_messages_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.peek_messages_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.peek_messages()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.peek_messages_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.peek_messages_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-get"))]
+    fn get_messages(&self) -> Option<BackendFeature<Self::Context, dyn GetMessages>> {
-    fn get_messages(&self) -> BackendFeatureBuilder<Self::Context, dyn GetMessages> {
         match self.toml_account_config.get_messages_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.get_messages_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.get_messages_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.get_messages_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.get_messages_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.get_messages()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.get_messages_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.get_messages_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(feature = "message-copy")]
+    fn copy_messages(&self) -> Option<BackendFeature<Self::Context, dyn CopyMessages>> {
-    fn copy_messages(&self) -> BackendFeatureBuilder<Self::Context, dyn CopyMessages> {
         match self.toml_account_config.copy_messages_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.copy_messages_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.copy_messages_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.copy_messages_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.copy_messages_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.copy_messages()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.copy_messages_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.copy_messages_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-move"))]
+    fn move_messages(&self) -> Option<BackendFeature<Self::Context, dyn MoveMessages>> {
-    fn move_messages(&self) -> BackendFeatureBuilder<Self::Context, dyn MoveMessages> {
         match self.toml_account_config.move_messages_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.move_messages_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.move_messages_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.move_messages_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.move_messages_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.move_messages()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.move_messages_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.move_messages_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    #[cfg(feature = "message-delete")]
+    fn delete_messages(&self) -> Option<BackendFeature<Self::Context, dyn DeleteMessages>> {
-    fn delete_messages(&self) -> BackendFeatureBuilder<Self::Context, dyn DeleteMessages> {
         match self.toml_account_config.delete_messages_kind() {
             #[cfg(feature = "imap")]
-            Some(BackendKind::Imap) => self.delete_messages_from(self.imap.as_ref()),
+            Some(BackendKind::Imap) => self.delete_messages_with_some(&self.imap),
             #[cfg(feature = "maildir")]
-            Some(BackendKind::Maildir) => self.delete_messages_from(self.maildir.as_ref()),
+            Some(BackendKind::Maildir) => self.delete_messages_with_some(&self.maildir),
             #[cfg(feature = "account-sync")]
             Some(BackendKind::MaildirForSync) => {
                 let f = self.maildir_for_sync.as_ref()?.delete_messages()?;
                 Some(Arc::new(move |ctx| f(ctx.maildir_for_sync.as_ref()?)))
             }
             #[cfg(feature = "notmuch")]
-            Some(BackendKind::Notmuch) => self.delete_messages_from(self.notmuch.as_ref()),
+            Some(BackendKind::Notmuch) => self.delete_messages_with_some(&self.notmuch),
             _ => None,
         }
     }
 
-    async fn build(self, config: Arc<AccountConfig>) -> Result<Self::Context> {
+    async fn build(self) -> Result<Self::Context> {
         let mut ctx = BackendContext::default();
 
         #[cfg(feature = "imap")]
         if let Some(imap) = self.imap {
-            ctx.imap = Some(imap.build(config.clone()).await?);
+            ctx.imap = Some(imap.build().await?);
         }
 
         #[cfg(feature = "maildir")]
         if let Some(maildir) = self.maildir {
-            ctx.maildir = Some(maildir.build(config.clone()).await?);
+            ctx.maildir = Some(maildir.build().await?);
         }
 
         #[cfg(feature = "account-sync")]
         if let Some(maildir) = self.maildir_for_sync {
-            ctx.maildir_for_sync = Some(maildir.build(config.clone()).await?);
+            ctx.maildir_for_sync = Some(maildir.build().await?);
         }
 
         #[cfg(feature = "notmuch")]
         if let Some(notmuch) = self.notmuch {
-            ctx.notmuch = Some(notmuch.build(config.clone()).await?);
+            ctx.notmuch = Some(notmuch.build().await?);
         }
 
         #[cfg(feature = "smtp")]
         if let Some(smtp) = self.smtp {
-            ctx.smtp = Some(smtp.build(config.clone()).await?);
+            ctx.smtp = Some(smtp.build().await?);
         }
 
         #[cfg(feature = "sendmail")]
         if let Some(sendmail) = self.sendmail {
-            ctx.sendmail = Some(sendmail.build(config.clone()).await?);
+            ctx.sendmail = Some(sendmail.build().await?);
         }
 
         Ok(ctx)
@@ -586,37 +543,37 @@ pub struct BackendContext {
 }
 
 #[cfg(feature = "imap")]
-impl FindBackendSubcontext<ImapContextSync> for BackendContext {
+impl AsRef<Option<ImapContextSync>> for BackendContext {
-    fn find_subcontext(&self) -> Option<&ImapContextSync> {
+    fn as_ref(&self) -> &Option<ImapContextSync> {
-        self.imap.as_ref()
+        &self.imap
     }
 }
 
 #[cfg(feature = "maildir")]
-impl FindBackendSubcontext<MaildirContextSync> for BackendContext {
+impl AsRef<Option<MaildirContextSync>> for BackendContext {
-    fn find_subcontext(&self) -> Option<&MaildirContextSync> {
+    fn as_ref(&self) -> &Option<MaildirContextSync> {
-        self.maildir.as_ref()
+        &self.maildir
     }
 }
 
 #[cfg(feature = "notmuch")]
-impl FindBackendSubcontext<NotmuchContextSync> for BackendContext {
+impl AsRef<Option<NotmuchContextSync>> for BackendContext {
-    fn find_subcontext(&self) -> Option<&NotmuchContextSync> {
+    fn as_ref(&self) -> &Option<NotmuchContextSync> {
-        self.notmuch.as_ref()
+        &self.notmuch
     }
 }
 
 #[cfg(feature = "smtp")]
-impl FindBackendSubcontext<SmtpContextSync> for BackendContext {
+impl AsRef<Option<SmtpContextSync>> for BackendContext {
-    fn find_subcontext(&self) -> Option<&SmtpContextSync> {
+    fn as_ref(&self) -> &Option<SmtpContextSync> {
-        self.smtp.as_ref()
+        &self.smtp
     }
 }
 
 #[cfg(feature = "sendmail")]
-impl FindBackendSubcontext<SendmailContextSync> for BackendContext {
+impl AsRef<Option<SendmailContextSync>> for BackendContext {
-    fn find_subcontext(&self) -> Option<&SendmailContextSync> {
+    fn as_ref(&self) -> &Option<SendmailContextSync> {
-        self.sendmail.as_ref()
+        &self.sendmail
     }
 }
 
@@ -641,7 +598,7 @@ impl Backend {
         .await?;
         let mut backend_builder =
             email::backend::BackendBuilder::new(account_config.clone(), backend_ctx_builder)
-                .with_default_features_disabled();
+                .without_features();
 
         with_features(&mut backend_builder);
 
@@ -651,7 +608,6 @@ impl Backend {
         })
     }
 
-    #[allow(unused)]
     fn build_id_mapper(
         &self,
         folder: &str,
@@ -697,7 +653,6 @@ impl Backend {
         Ok(id_mapper)
     }
 
-    #[cfg(any(feature = "account-sync", feature = "envelope-list"))]
     pub async fn list_envelopes(
         &self,
         folder: &str,
@@ -711,7 +666,6 @@ impl Backend {
         Ok(envelopes)
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-add"))]
     pub async fn add_flags(&self, folder: &str, ids: &[usize], flags: &Flags) -> Result<()> {
         let backend_kind = self.toml_account_config.add_flags_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -719,7 +673,6 @@ impl Backend {
         self.backend.add_flags(folder, &ids, flags).await
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-add"))]
     pub async fn add_flag(&self, folder: &str, ids: &[usize], flag: Flag) -> Result<()> {
         let backend_kind = self.toml_account_config.add_flags_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -727,7 +680,6 @@ impl Backend {
         self.backend.add_flag(folder, &ids, flag).await
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-set"))]
     pub async fn set_flags(&self, folder: &str, ids: &[usize], flags: &Flags) -> Result<()> {
         let backend_kind = self.toml_account_config.set_flags_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -735,7 +687,6 @@ impl Backend {
         self.backend.set_flags(folder, &ids, flags).await
     }
 
-    #[cfg(any(feature = "account-sync", feature = "flag-set"))]
     pub async fn set_flag(&self, folder: &str, ids: &[usize], flag: Flag) -> Result<()> {
         let backend_kind = self.toml_account_config.set_flags_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -743,7 +694,6 @@ impl Backend {
         self.backend.set_flag(folder, &ids, flag).await
     }
 
-    #[cfg(feature = "flag-remove")]
     pub async fn remove_flags(&self, folder: &str, ids: &[usize], flags: &Flags) -> Result<()> {
         let backend_kind = self.toml_account_config.remove_flags_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -751,7 +701,6 @@ impl Backend {
         self.backend.remove_flags(folder, &ids, flags).await
     }
 
-    #[cfg(feature = "flag-remove")]
     pub async fn remove_flag(&self, folder: &str, ids: &[usize], flag: Flag) -> Result<()> {
         let backend_kind = self.toml_account_config.remove_flags_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -759,7 +708,6 @@ impl Backend {
         self.backend.remove_flag(folder, &ids, flag).await
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-add"))]
     pub async fn add_message(&self, folder: &str, email: &[u8]) -> Result<SingleId> {
         let backend_kind = self.toml_account_config.add_message_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -768,7 +716,6 @@ impl Backend {
         Ok(id)
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-peek"))]
     pub async fn peek_messages(&self, folder: &str, ids: &[usize]) -> Result<Messages> {
         let backend_kind = self.toml_account_config.get_messages_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -776,7 +723,6 @@ impl Backend {
         self.backend.peek_messages(folder, &ids).await
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-get"))]
     pub async fn get_messages(&self, folder: &str, ids: &[usize]) -> Result<Messages> {
         let backend_kind = self.toml_account_config.get_messages_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;
@@ -784,7 +730,6 @@ impl Backend {
         self.backend.get_messages(folder, &ids).await
     }
 
-    #[cfg(feature = "message-copy")]
     pub async fn copy_messages(
         &self,
         from_folder: &str,
@@ -799,7 +744,6 @@ impl Backend {
             .await
     }
 
-    #[cfg(any(feature = "account-sync", feature = "message-move"))]
     pub async fn move_messages(
         &self,
         from_folder: &str,
@@ -814,7 +758,6 @@ impl Backend {
             .await
     }
 
-    #[cfg(feature = "message-delete")]
     pub async fn delete_messages(&self, folder: &str, ids: &[usize]) -> Result<()> {
         let backend_kind = self.toml_account_config.delete_messages_kind();
         let id_mapper = self.build_id_mapper(folder, backend_kind)?;

src/backend/wizard.rs

@@ -33,8 +33,8 @@ const SEND_MESSAGE_BACKEND_KINDS: &[BackendKind] = &[
 ];
 
 pub(crate) async fn configure(
-    #[allow(unused)] account_name: &str,
+    account_name: &str,
-    #[allow(unused)] email: &str,
+    email: &str,
     autoconfig: Option<&AutoConfig>,
 ) -> Result<Option<BackendConfig>> {
     let kind = Select::with_theme(&*THEME)
@@ -60,8 +60,8 @@ pub(crate) async fn configure(
 }
 
 pub(crate) async fn configure_sender(
-    #[allow(unused)] account_name: &str,
+    account_name: &str,
-    #[allow(unused)] email: &str,
+    email: &str,
     autoconfig: Option<&AutoConfig>,
 ) -> Result<Option<BackendConfig>> {
     let kind = Select::with_theme(&*THEME)

src/cli.rs

@@ -2,25 +2,18 @@ use anyhow::Result;
 use clap::{Parser, Subcommand};
 use std::path::PathBuf;
 
-#[cfg(feature = "account-subcmd")]
-use crate::account::command::AccountSubcommand;
-#[cfg(feature = "envelope-subcmd")]
-use crate::envelope::command::EnvelopeSubcommand;
-#[cfg(feature = "flag-subcmd")]
-use crate::flag::command::FlagSubcommand;
-#[cfg(feature = "folder-subcmd")]
-use crate::folder::command::FolderSubcommand;
-#[cfg(feature = "attachment-subcmd")]
-use crate::message::attachment::command::AttachmentSubcommand;
-#[cfg(feature = "message-subcmd")]
-use crate::message::command::MessageSubcommand;
-#[cfg(feature = "template-subcmd")]
-use crate::message::template::command::TemplateSubcommand;
-#[allow(unused)]
 use crate::{
+    account::command::AccountSubcommand,
     completion::command::CompletionGenerateCommand,
     config::{self, TomlConfig},
+    envelope::command::EnvelopeSubcommand,
+    flag::command::FlagSubcommand,
+    folder::command::FolderSubcommand,
     manual::command::ManualGenerateCommand,
+    message::{
+        attachment::command::AttachmentSubcommand, command::MessageSubcommand,
+        template::command::TemplateSubcommand,
+    },
     output::{ColorFmt, OutputFmt},
     printer::Printer,
 };
@@ -29,12 +22,8 @@ use crate::{
 #[command(name = "himalaya", author, version, about)]
 #[command(propagate_version = true, infer_subcommands = true)]
 pub struct Cli {
-    #[cfg(feature = "envelope-list")]
     #[command(subcommand)]
     pub command: Option<HimalayaCommand>,
-    #[cfg(not(feature = "envelope-list"))]
-    #[command(subcommand)]
-    pub command: HimalayaCommand,
 
     /// Override the default configuration file path
     ///
@@ -88,38 +77,31 @@ pub struct Cli {
 
 #[derive(Subcommand, Debug)]
 pub enum HimalayaCommand {
-    #[cfg(feature = "account-subcmd")]
     #[command(subcommand)]
     #[command(alias = "accounts")]
     Account(AccountSubcommand),
 
-    #[cfg(feature = "folder-subcmd")]
     #[command(subcommand)]
     #[command(visible_alias = "mailbox", aliases = ["mailboxes", "mboxes", "mbox"])]
     #[command(alias = "folders")]
     Folder(FolderSubcommand),
 
-    #[cfg(feature = "envelope-subcmd")]
     #[command(subcommand)]
     #[command(alias = "envelopes")]
     Envelope(EnvelopeSubcommand),
 
-    #[cfg(feature = "flag-subcmd")]
     #[command(subcommand)]
     #[command(alias = "flags")]
     Flag(FlagSubcommand),
 
-    #[cfg(feature = "message-subcmd")]
     #[command(subcommand)]
     #[command(alias = "messages", alias = "msgs", alias = "msg")]
     Message(MessageSubcommand),
 
-    #[cfg(feature = "attachment-subcmd")]
     #[command(subcommand)]
     #[command(alias = "attachments")]
     Attachment(AttachmentSubcommand),
 
-    #[cfg(feature = "template-subcmd")]
     #[command(subcommand)]
     #[command(alias = "templates", alias = "tpls", alias = "tpl")]
     Template(TemplateSubcommand),
@@ -141,37 +123,30 @@ impl HimalayaCommand {
         config_path: Option<&PathBuf>,
     ) -> Result<()> {
         match self {
-            #[cfg(feature = "account-subcmd")]
             Self::Account(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await
             }
-            #[cfg(feature = "folder-subcmd")]
             Self::Folder(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await
             }
-            #[cfg(feature = "envelope-subcmd")]
             Self::Envelope(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await
             }
-            #[cfg(feature = "flag-subcmd")]
             Self::Flag(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await
             }
-            #[cfg(feature = "message-subcmd")]
             Self::Message(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await
             }
-            #[cfg(feature = "attachment-subcmd")]
             Self::Attachment(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await
             }
-            #[cfg(feature = "template-subcmd")]
             Self::Template(cmd) => {
                 let config = TomlConfig::from_some_path_or_default(config_path).await?;
                 cmd.execute(printer, &config).await

src/config/args.rs

@@ -1,26 +0,0 @@
-//! This module provides arguments related to the user config.
-
-use clap::{Arg, ArgMatches};
-
-const ARG_CONFIG: &str = "config";
-
-/// Represents the config file path argument. This argument allows the
-/// user to customize the config file path.
-pub fn global_args() -> impl IntoIterator<Item = Arg> {
-    [Arg::new(ARG_CONFIG)
-        .help("Override the configuration file path")
-        .long_help(
-            "Override the configuration file path
-
-If the file under the given path does not exist, the wizard will propose to create it.",
-        )
-        .long("config")
-        .short('c')
-        .global(true)
-        .value_name("path")]
-}
-
-/// Represents the config file path argument parser.
-pub fn parse_global_arg(matches: &ArgMatches) -> Option<&str> {
-    matches.get_one::<String>(ARG_CONFIG).map(String::as_str)
-}

src/config/mod.rs

@@ -1,12 +1,10 @@
-pub mod args;
-#[cfg(feature = "wizard")]
 pub mod wizard;
 
 use anyhow::{anyhow, Context, Result};
 use dirs::{config_dir, home_dir};
 use email::{
     account::config::AccountConfig, config::Config, envelope::config::EnvelopeConfig,
-    folder::config::FolderConfig, message::config::MessageConfig,
+    flag::config::FlagConfig, folder::config::FolderConfig, message::config::MessageConfig,
 };
 
 use serde::{Deserialize, Serialize};
@@ -19,11 +17,9 @@ use std::{
 };
 use toml;
 
-use crate::account::config::TomlAccountConfig;
 #[cfg(feature = "account-sync")]
 use crate::backend::BackendKind;
-#[cfg(feature = "wizard")]
+use crate::{account::config::TomlAccountConfig, wizard_prompt, wizard_warn};
-use crate::{wizard_prompt, wizard_warn};
 
 /// Represents the user config file.
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
@@ -34,8 +30,6 @@ pub struct TomlConfig {
     pub signature: Option<String>,
     pub signature_delim: Option<String>,
     pub downloads_dir: Option<PathBuf>,
-
-    #[serde(flatten)]
     pub accounts: HashMap<String, TomlAccountConfig>,
 }
 
@@ -50,7 +44,6 @@ impl TomlConfig {
         toml::from_str(&content).context(format!("cannot parse config file at {path:?}"))
     }
 
-    #[cfg(feature = "wizard")]
     /// Create and save a TOML configuration using the wizard.
     ///
     /// If the user accepts the confirmation, the wizard starts and
@@ -83,10 +76,7 @@ impl TomlConfig {
     pub async fn from_default_paths() -> Result<Self> {
         match Self::first_valid_default_path() {
             Some(path) => Self::from_path(&path),
-            #[cfg(feature = "wizard")]
             None => Self::from_wizard(Self::default_path()?).await,
-            #[cfg(not(feature = "wizard"))]
-            None => anyhow::bail!("cannot find configuration file from default locations"),
         }
     }
 
@@ -105,7 +95,6 @@ impl TomlConfig {
     pub async fn from_some_path_or_default(path: Option<impl Into<PathBuf>>) -> Result<Self> {
         match path.map(Into::into) {
             Some(ref path) if path.exists() => Self::from_path(path),
-            #[cfg(feature = "wizard")]
             Some(path) => Self::from_wizard(path).await,
             _ => Self::from_default_paths().await,
         }
@@ -215,25 +204,28 @@ impl TomlConfig {
                             signature: config.signature,
                             signature_delim: config.signature_delim,
                             downloads_dir: config.downloads_dir,
-
+                            folder: config.folder.map(|c| FolderConfig {
-                            folder: config.folder.map(|#[allow(unused)] c| FolderConfig {
                                 aliases: c.alias,
-                                #[cfg(any(feature = "account-sync", feature = "folder-list"))]
                                 list: c.list.map(|c| c.remote),
+                                #[cfg(feature = "account-sync")]
+                                sync: c.sync,
                             }),
-                            envelope: config.envelope.map(|#[allow(unused)] c| EnvelopeConfig {
+                            envelope: config.envelope.map(|c| EnvelopeConfig {
-                                #[cfg(any(feature = "account-sync", feature = "envelope-list"))]
                                 list: c.list.map(|c| c.remote),
-                                #[cfg(feature = "envelope-watch")]
                                 watch: c.watch.map(|c| c.remote),
+                                #[cfg(feature = "account-sync")]
+                                sync: c.sync,
                             }),
-                            message: config.message.map(|#[allow(unused)] c| MessageConfig {
+                            flag: config.flag.map(|c| FlagConfig {
-                                #[cfg(any(feature = "account-sync", feature = "message-read"))]
+                                #[cfg(feature = "account-sync")]
+                                sync: c.sync,
+                            }),
+                            message: config.message.map(|c| MessageConfig {
                                 read: c.read.map(|c| c.remote),
-                                #[cfg(any(feature = "account-sync", feature = "message-write"))]
                                 write: c.write.map(|c| c.remote),
-                                #[cfg(feature = "message-send")]
                                 send: c.send.map(|c| c.remote),
+                                #[cfg(feature = "account-sync")]
+                                sync: c.sync,
                             }),
                             #[cfg(feature = "account-sync")]
                             sync: config.sync,

src/config/prelude.rs

@@ -1,791 +0,0 @@
-#[cfg(feature = "pgp-commands")]
-use email::account::CmdsPgpConfig;
-#[cfg(feature = "pgp-gpg")]
-use email::account::GpgConfig;
-#[cfg(feature = "pgp")]
-use email::account::PgpConfig;
-#[cfg(feature = "pgp-native")]
-use email::account::{NativePgpConfig, NativePgpSecretKey, SignedSecretKey};
-#[cfg(feature = "notmuch")]
-use email::backend::NotmuchConfig;
-#[cfg(feature = "imap")]
-use email::imap::config::{ImapAuthConfig, ImapConfig};
-#[cfg(feature = "smtp")]
-use email::smtp::config::{SmtpAuthConfig, SmtpConfig};
-use email::{
-    account::config::{
-        oauth2::{OAuth2Config, OAuth2Method, OAuth2Scopes},
-        passwd::PasswdConfig,
-    },
-    email::config::{EmailHooks, EmailTextPlainFormat},
-    folder::sync::FolderSyncStrategy,
-    maildir::config::MaildirConfig,
-    sendmail::config::SendmailConfig,
-};
-use keyring::Entry;
-use process::{Cmd, Pipeline, SingleCmd};
-use secret::Secret;
-use serde::{ser::SerializeSeq, Deserialize, Serialize, Serializer};
-use std::{collections::HashSet, ops::Deref, path::PathBuf};
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "Entry", from = "String")]
-pub struct EntryDef(#[serde(getter = "Deref::deref")] String);
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "SingleCmd", from = "String")]
-pub struct SingleCmdDef(#[serde(getter = "Deref::deref")] String);
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "Pipeline", from = "Vec<String>")]
-pub struct PipelineDef(
-    #[serde(getter = "Deref::deref", serialize_with = "pipeline")] Vec<SingleCmd>,
-);
-
-// NOTE: did not find the way to do it with macros…
-pub fn pipeline<S>(cmds: &Vec<SingleCmd>, s: S) -> Result<S::Ok, S::Error>
-where
-    S: Serializer,
-{
-    let mut seq = s.serialize_seq(Some(cmds.len()))?;
-    for cmd in cmds {
-        seq.serialize_element(&cmd.to_string())?;
-    }
-    seq.end()
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "Cmd", untagged)]
-pub enum CmdDef {
-    #[serde(with = "SingleCmdDef")]
-    SingleCmd(SingleCmd),
-    #[serde(with = "PipelineDef")]
-    Pipeline(Pipeline),
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "Option<Cmd>", from = "OptionCmd", into = "OptionCmd")]
-pub struct OptionCmdDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionCmd {
-    #[serde(default, skip)]
-    is_some: bool,
-    #[serde(flatten, with = "CmdDef")]
-    inner: Cmd,
-}
-
-impl From<OptionCmd> for Option<Cmd> {
-    fn from(cmd: OptionCmd) -> Option<Cmd> {
-        if cmd.is_some {
-            Some(cmd.inner)
-        } else {
-            None
-        }
-    }
-}
-
-impl Into<OptionCmd> for Option<Cmd> {
-    fn into(self) -> OptionCmd {
-        match self {
-            Some(cmd) => OptionCmd {
-                is_some: true,
-                inner: cmd,
-            },
-            None => OptionCmd {
-                is_some: false,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "Secret", rename_all = "kebab-case")]
-pub enum SecretDef {
-    Raw(String),
-    #[serde(with = "CmdDef")]
-    Cmd(Cmd),
-    #[serde(with = "EntryDef", rename = "keyring")]
-    KeyringEntry(Entry),
-    #[default]
-    Undefined,
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "OAuth2Method")]
-pub enum OAuth2MethodDef {
-    #[serde(rename = "xoauth2", alias = "XOAUTH2")]
-    XOAuth2,
-    #[serde(rename = "oauthbearer", alias = "OAUTHBEARER")]
-    OAuthBearer,
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<ImapConfig>",
-    from = "OptionImapConfig",
-    into = "OptionImapConfig"
-)]
-pub struct OptionImapConfigDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionImapConfig {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "ImapConfigDef")]
-    inner: ImapConfig,
-}
-
-impl From<OptionImapConfig> for Option<ImapConfig> {
-    fn from(config: OptionImapConfig) -> Option<ImapConfig> {
-        if config.is_none {
-            None
-        } else {
-            Some(config.inner)
-        }
-    }
-}
-
-impl Into<OptionImapConfig> for Option<ImapConfig> {
-    fn into(self) -> OptionImapConfig {
-        match self {
-            Some(config) => OptionImapConfig {
-                is_none: false,
-                inner: config,
-            },
-            None => OptionImapConfig {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[cfg(feature = "imap")]
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "ImapConfig", rename_all = "kebab-case")]
-pub struct ImapConfigDef {
-    pub host: String,
-    pub port: u16,
-    pub ssl: Option<bool>,
-    pub starttls: Option<bool>,
-    pub insecure: Option<bool>,
-    pub login: String,
-    #[serde(flatten, with = "ImapAuthConfigDef")]
-    pub auth: ImapAuthConfig,
-    pub notify_cmd: Option<String>,
-    pub notify_query: Option<String>,
-    pub watch_cmds: Option<Vec<String>>,
-}
-
-#[cfg(feature = "imap")]
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "ImapAuthConfig", tag = "auth")]
-pub enum ImapAuthConfigDef {
-    #[serde(rename = "passwd", alias = "password", with = "ImapPasswdConfigDef")]
-    Passwd(#[serde(default)] PasswdConfig),
-    #[serde(rename = "oauth2", with = "ImapOAuth2ConfigDef")]
-    OAuth2(OAuth2Config),
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "PasswdConfig")]
-pub struct ImapPasswdConfigDef {
-    #[serde(
-        rename = "passwd",
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub passwd: Secret,
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "OAuth2Config")]
-pub struct ImapOAuth2ConfigDef {
-    #[serde(rename = "imap-oauth2-method", with = "OAuth2MethodDef", default)]
-    pub method: OAuth2Method,
-    #[serde(rename = "imap-oauth2-client-id")]
-    pub client_id: String,
-    #[serde(
-        rename = "imap-oauth2-client-secret",
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub client_secret: Secret,
-    #[serde(rename = "imap-oauth2-auth-url")]
-    pub auth_url: String,
-    #[serde(rename = "imap-oauth2-token-url")]
-    pub token_url: String,
-    #[serde(
-        rename = "imap-oauth2-access-token",
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub access_token: Secret,
-    #[serde(
-        rename = "imap-oauth2-refresh-token",
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub refresh_token: Secret,
-    #[serde(flatten, with = "ImapOAuth2ScopesDef")]
-    pub scopes: OAuth2Scopes,
-    #[serde(rename = "imap-oauth2-pkce", default)]
-    pub pkce: bool,
-    #[serde(
-        rename = "imap-oauth2-redirect-host",
-        default = "OAuth2Config::default_redirect_host"
-    )]
-    pub redirect_host: String,
-    #[serde(
-        rename = "imap-oauth2-redirect-port",
-        default = "OAuth2Config::default_redirect_port"
-    )]
-    pub redirect_port: u16,
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "OAuth2Scopes")]
-pub enum ImapOAuth2ScopesDef {
-    #[serde(rename = "imap-oauth2-scope")]
-    Scope(String),
-    #[serde(rename = "imap-oauth2-scopes")]
-    Scopes(Vec<String>),
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<MaildirConfig>",
-    from = "OptionMaildirConfig",
-    into = "OptionMaildirConfig"
-)]
-pub struct OptionMaildirConfigDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionMaildirConfig {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "MaildirConfigDef")]
-    inner: MaildirConfig,
-}
-
-impl From<OptionMaildirConfig> for Option<MaildirConfig> {
-    fn from(config: OptionMaildirConfig) -> Option<MaildirConfig> {
-        if config.is_none {
-            None
-        } else {
-            Some(config.inner)
-        }
-    }
-}
-
-impl Into<OptionMaildirConfig> for Option<MaildirConfig> {
-    fn into(self) -> OptionMaildirConfig {
-        match self {
-            Some(config) => OptionMaildirConfig {
-                is_none: false,
-                inner: config,
-            },
-            None => OptionMaildirConfig {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "MaildirConfig", rename_all = "kebab-case")]
-pub struct MaildirConfigDef {
-    #[serde(rename = "maildir-root-dir")]
-    pub root_dir: PathBuf,
-}
-
-#[cfg(feature = "notmuch")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<NotmuchConfig>",
-    from = "OptionNotmuchConfig",
-    into = "OptionNotmuchConfig"
-)]
-pub struct OptionNotmuchConfigDef;
-
-#[cfg(feature = "notmuch")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionNotmuchConfig {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "NotmuchConfigDef")]
-    inner: NotmuchConfig,
-}
-
-#[cfg(feature = "notmuch")]
-impl From<OptionNotmuchConfig> for Option<NotmuchConfig> {
-    fn from(config: OptionNotmuchConfig) -> Option<NotmuchConfig> {
-        if config.is_none {
-            None
-        } else {
-            Some(config.inner)
-        }
-    }
-}
-
-#[cfg(feature = "notmuch")]
-impl Into<OptionNotmuchConfig> for Option<NotmuchConfig> {
-    fn into(self) -> OptionNotmuchConfig {
-        match self {
-            Some(config) => OptionNotmuchConfig {
-                is_none: false,
-                inner: config,
-            },
-            None => OptionNotmuchConfig {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[cfg(feature = "notmuch")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "NotmuchConfig", rename_all = "kebab-case")]
-pub struct NotmuchConfigDef {
-    #[serde(rename = "notmuch-db-path")]
-    pub db_path: PathBuf,
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<EmailTextPlainFormat>",
-    from = "OptionEmailTextPlainFormat",
-    into = "OptionEmailTextPlainFormat"
-)]
-pub struct OptionEmailTextPlainFormatDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionEmailTextPlainFormat {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "EmailTextPlainFormatDef")]
-    inner: EmailTextPlainFormat,
-}
-
-impl From<OptionEmailTextPlainFormat> for Option<EmailTextPlainFormat> {
-    fn from(fmt: OptionEmailTextPlainFormat) -> Option<EmailTextPlainFormat> {
-        if fmt.is_none {
-            None
-        } else {
-            Some(fmt.inner)
-        }
-    }
-}
-
-impl Into<OptionEmailTextPlainFormat> for Option<EmailTextPlainFormat> {
-    fn into(self) -> OptionEmailTextPlainFormat {
-        match self {
-            Some(config) => OptionEmailTextPlainFormat {
-                is_none: false,
-                inner: config,
-            },
-            None => OptionEmailTextPlainFormat {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "EmailTextPlainFormat",
-    tag = "type",
-    content = "width",
-    rename_all = "kebab-case"
-)]
-pub enum EmailTextPlainFormatDef {
-    #[default]
-    Auto,
-    Flowed,
-    Fixed(usize),
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<SmtpConfig>",
-    from = "OptionSmtpConfig",
-    into = "OptionSmtpConfig"
-)]
-pub struct OptionSmtpConfigDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionSmtpConfig {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "SmtpConfigDef")]
-    inner: SmtpConfig,
-}
-
-impl From<OptionSmtpConfig> for Option<SmtpConfig> {
-    fn from(config: OptionSmtpConfig) -> Option<SmtpConfig> {
-        if config.is_none {
-            None
-        } else {
-            Some(config.inner)
-        }
-    }
-}
-
-impl Into<OptionSmtpConfig> for Option<SmtpConfig> {
-    fn into(self) -> OptionSmtpConfig {
-        match self {
-            Some(config) => OptionSmtpConfig {
-                is_none: false,
-                inner: config,
-            },
-            None => OptionSmtpConfig {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[cfg(feature = "smtp")]
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "SmtpConfig")]
-struct SmtpConfigDef {
-    pub host: String,
-    pub port: u16,
-    pub ssl: Option<bool>,
-    pub starttls: Option<bool>,
-    pub insecure: Option<bool>,
-    pub login: String,
-    #[serde(flatten, with = "SmtpAuthConfigDef")]
-    pub auth: SmtpAuthConfig,
-}
-
-#[cfg(feature = "smtp")]
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "SmtpAuthConfig", tag = "auth")]
-pub enum SmtpAuthConfigDef {
-    #[serde(rename = "passwd", alias = "password", with = "SmtpPasswdConfigDef")]
-    Passwd(#[serde(default)] PasswdConfig),
-    #[serde(rename = "oauth2", with = "SmtpOAuth2ConfigDef")]
-    OAuth2(OAuth2Config),
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "PasswdConfig", default)]
-pub struct SmtpPasswdConfigDef {
-    #[serde(
-        rename = "passwd",
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub passwd: Secret,
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "OAuth2Config", rename_all = "kebab-case")]
-pub struct SmtpOAuth2ConfigDef {
-    #[serde(with = "OAuth2MethodDef", default)]
-    pub method: OAuth2Method,
-    pub client_id: String,
-    #[serde(
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub client_secret: Secret,
-    pub auth_url: String,
-    pub token_url: String,
-    #[serde(
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub access_token: Secret,
-    #[serde(
-        with = "SecretDef",
-        default,
-        skip_serializing_if = "Secret::is_undefined"
-    )]
-    pub refresh_token: Secret,
-    #[serde(flatten, with = "SmtpOAuth2ScopesDef")]
-    pub scopes: OAuth2Scopes,
-    #[serde(default)]
-    pub pkce: bool,
-    #[serde(default = "OAuth2Config::default_redirect_host")]
-    pub redirect_host: String,
-    #[serde(default = "OAuth2Config::default_redirect_port")]
-    pub redirect_port: u16,
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "OAuth2Scopes")]
-pub enum SmtpOAuth2ScopesDef {
-    #[serde(rename = "smtp-oauth2-scope")]
-    Scope(String),
-    #[serde(rename = "smtp-oauth2-scopes")]
-    Scopes(Vec<String>),
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<SendmailConfig>",
-    from = "OptionSendmailConfig",
-    into = "OptionSendmailConfig"
-)]
-pub struct OptionSendmailConfigDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionSendmailConfig {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "SendmailConfigDef")]
-    inner: SendmailConfig,
-}
-
-impl From<OptionSendmailConfig> for Option<SendmailConfig> {
-    fn from(config: OptionSendmailConfig) -> Option<SendmailConfig> {
-        if config.is_none {
-            None
-        } else {
-            Some(config.inner)
-        }
-    }
-}
-
-impl Into<OptionSendmailConfig> for Option<SendmailConfig> {
-    fn into(self) -> OptionSendmailConfig {
-        match self {
-            Some(config) => OptionSendmailConfig {
-                is_none: false,
-                inner: config,
-            },
-            None => OptionSendmailConfig {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "SendmailConfig", rename_all = "kebab-case")]
-pub struct SendmailConfigDef {
-    #[serde(with = "CmdDef", default = "sendmail_default_cmd")]
-    cmd: Cmd,
-}
-
-fn sendmail_default_cmd() -> Cmd {
-    Cmd::from("/usr/sbin/sendmail")
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<EmailHooks>",
-    from = "OptionEmailHooks",
-    into = "OptionEmailHooks"
-)]
-pub struct OptionEmailHooksDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionEmailHooks {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(
-        flatten,
-        skip_serializing_if = "EmailHooks::is_empty",
-        with = "EmailHooksDef"
-    )]
-    inner: EmailHooks,
-}
-
-impl From<OptionEmailHooks> for Option<EmailHooks> {
-    fn from(hooks: OptionEmailHooks) -> Option<EmailHooks> {
-        if hooks.is_none {
-            None
-        } else {
-            Some(hooks.inner)
-        }
-    }
-}
-
-impl Into<OptionEmailHooks> for Option<EmailHooks> {
-    fn into(self) -> OptionEmailHooks {
-        match self {
-            Some(hooks) => OptionEmailHooks {
-                is_none: false,
-                inner: hooks,
-            },
-            None => OptionEmailHooks {
-                is_none: true,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-/// Represents the email hooks. Useful for doing extra email
-/// processing before or after sending it.
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "EmailHooks", rename_all = "kebab-case")]
-pub struct EmailHooksDef {
-    /// Represents the hook called just before sending an email.
-    #[serde(default, with = "OptionCmdDef")]
-    pub pre_send: Option<Cmd>,
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(
-    remote = "Option<FolderSyncStrategy>",
-    from = "OptionFolderSyncStrategy",
-    into = "OptionFolderSyncStrategy"
-)]
-pub struct OptionFolderSyncStrategyDef;
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionFolderSyncStrategy {
-    #[serde(default, skip)]
-    is_some: bool,
-    #[serde(
-        flatten,
-        skip_serializing_if = "FolderSyncStrategy::is_default",
-        with = "FolderSyncStrategyDef"
-    )]
-    inner: FolderSyncStrategy,
-}
-
-impl From<OptionFolderSyncStrategy> for Option<FolderSyncStrategy> {
-    fn from(option: OptionFolderSyncStrategy) -> Option<FolderSyncStrategy> {
-        if option.is_some {
-            Some(option.inner)
-        } else {
-            None
-        }
-    }
-}
-
-impl Into<OptionFolderSyncStrategy> for Option<FolderSyncStrategy> {
-    fn into(self) -> OptionFolderSyncStrategy {
-        match self {
-            Some(strategy) => OptionFolderSyncStrategy {
-                is_some: true,
-                inner: strategy,
-            },
-            None => OptionFolderSyncStrategy {
-                is_some: false,
-                inner: Default::default(),
-            },
-        }
-    }
-}
-
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "FolderSyncStrategy", rename_all = "kebab-case")]
-pub enum FolderSyncStrategyDef {
-    #[default]
-    All,
-    #[serde(alias = "only")]
-    Include(HashSet<String>),
-    #[serde(alias = "except")]
-    #[serde(alias = "ignore")]
-    Exclude(HashSet<String>),
-}
-
-#[cfg(feature = "pgp")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "Option<PgpConfig>", from = "OptionPgpConfig")]
-pub struct OptionPgpConfigDef;
-
-#[cfg(feature = "pgp")]
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-pub struct OptionPgpConfig {
-    #[serde(default, skip)]
-    is_none: bool,
-    #[serde(flatten, with = "PgpConfigDef")]
-    inner: PgpConfig,
-}
-
-#[cfg(feature = "pgp")]
-impl From<OptionPgpConfig> for Option<PgpConfig> {
-    fn from(config: OptionPgpConfig) -> Option<PgpConfig> {
-        if config.is_none {
-            None
-        } else {
-            Some(config.inner)
-        }
-    }
-}
-
-#[cfg(feature = "pgp")]
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "PgpConfig", tag = "backend", rename_all = "kebab-case")]
-pub enum PgpConfigDef {
-    #[cfg(feature = "pgp-commands")]
-    #[serde(with = "CmdsPgpConfigDef", alias = "commands")]
-    Cmds(CmdsPgpConfig),
-    #[cfg(feature = "pgp-gpg")]
-    #[serde(with = "GpgConfigDef")]
-    Gpg(GpgConfig),
-    #[cfg(feature = "pgp-native")]
-    #[serde(with = "NativePgpConfigDef")]
-    Native(NativePgpConfig),
-}
-
-#[cfg(feature = "pgp-gpg")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "GpgConfig", rename_all = "kebab-case")]
-pub struct GpgConfigDef;
-
-#[cfg(feature = "pgp-commands")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "CmdsPgpConfig", rename_all = "kebab-case")]
-pub struct CmdsPgpConfigDef {
-    #[serde(default, with = "OptionCmdDef")]
-    encrypt_cmd: Option<Cmd>,
-    #[serde(default)]
-    encrypt_recipient_fmt: Option<String>,
-    #[serde(default)]
-    encrypt_recipients_sep: Option<String>,
-    #[serde(default, with = "OptionCmdDef")]
-    decrypt_cmd: Option<Cmd>,
-    #[serde(default, with = "OptionCmdDef")]
-    sign_cmd: Option<Cmd>,
-    #[serde(default, with = "OptionCmdDef")]
-    verify_cmd: Option<Cmd>,
-}
-
-#[cfg(feature = "pgp-native")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "NativePgpConfig", rename_all = "kebab-case")]
-pub struct NativePgpConfigDef {
-    #[serde(default, with = "NativePgpSecretKeyDef")]
-    secret_key: NativePgpSecretKey,
-    #[serde(default, with = "SecretDef")]
-    secret_key_passphrase: Secret,
-    #[serde(default = "NativePgpConfig::default_wkd")]
-    wkd: bool,
-    #[serde(default = "NativePgpConfig::default_key_servers")]
-    key_servers: Vec<String>,
-}
-
-#[cfg(feature = "pgp-native")]
-#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
-#[serde(remote = "NativePgpSecretKey", rename_all = "kebab-case")]
-pub enum NativePgpSecretKeyDef {
-    #[default]
-    None,
-    #[serde(skip)]
-    Raw(SignedSecretKey),
-    Path(PathBuf),
-    #[serde(with = "EntryDef")]
-    Keyring(Entry),
-}

src/email/envelope/command/list.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -82,7 +83,7 @@ impl ListEnvelopesCommand {
             toml_account_config.clone(),
             account_config.clone(),
             list_envelopes_kind,
-            |builder| builder.set_list_envelopes(Some(None)),
+            |builder| builder.set_list_envelopes(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/envelope/command/mod.rs

@@ -1,6 +1,4 @@
-#[cfg(feature = "envelope-list")]
 pub mod list;
-#[cfg(feature = "envelope-watch")]
 pub mod watch;
 
 use anyhow::Result;
@@ -8,10 +6,7 @@ use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "envelope-list")]
+use self::{list::ListEnvelopesCommand, watch::WatchEnvelopesCommand};
-use self::list::ListEnvelopesCommand;
-#[cfg(feature = "envelope-watch")]
-use self::watch::WatchEnvelopesCommand;
 
 /// Manage envelopes.
 ///
@@ -21,11 +16,9 @@ use self::watch::WatchEnvelopesCommand;
 /// manage them.
 #[derive(Debug, Subcommand)]
 pub enum EnvelopeSubcommand {
-    #[cfg(feature = "envelope-list")]
     #[command(alias = "lst")]
     List(ListEnvelopesCommand),
 
-    #[cfg(feature = "envelope-watch")]
     #[command()]
     Watch(WatchEnvelopesCommand),
 }
@@ -34,9 +27,7 @@ impl EnvelopeSubcommand {
     #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "envelope-list")]
             Self::List(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "envelope-watch")]
             Self::Watch(cmd) => cmd.execute(printer, config).await,
         }
     }

src/email/envelope/command/watch.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::{backend::feature::BackendFeatureSource, envelope::watch::WatchEnvelopes};
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -43,7 +44,7 @@ impl WatchEnvelopesCommand {
             toml_account_config.clone(),
             account_config,
             watch_envelopes_kind,
-            |builder| builder.set_watch_envelopes(Some(None)),
+            |builder| builder.set_watch_envelopes(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/envelope/config.rs

@@ -1,3 +1,5 @@
+#[cfg(feature = "account-sync")]
+use email::envelope::sync::config::EnvelopeSyncConfig;
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 
@@ -5,30 +7,25 @@ use crate::backend::BackendKind;
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct EnvelopeConfig {
-    #[cfg(any(feature = "account-sync", feature = "envelope-list"))]
     pub list: Option<ListEnvelopesConfig>,
-    #[cfg(feature = "envelope-watch")]
     pub watch: Option<WatchEnvelopesConfig>,
-    #[cfg(any(feature = "account-sync", feature = "envelope-get"))]
     pub get: Option<GetEnvelopeConfig>,
+    #[cfg(feature = "account-sync")]
+    pub sync: Option<EnvelopeSyncConfig>,
 }
 
 impl EnvelopeConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
-        #[allow(unused_mut)]
         let mut kinds = HashSet::default();
 
-        #[cfg(any(feature = "account-sync", feature = "envelope-list"))]
         if let Some(list) = &self.list {
             kinds.extend(list.get_used_backends());
         }
 
-        #[cfg(feature = "envelope-watch")]
         if let Some(watch) = &self.watch {
             kinds.extend(watch.get_used_backends());
         }
 
-        #[cfg(any(feature = "account-sync", feature = "envelope-get"))]
         if let Some(get) = &self.get {
             kinds.extend(get.get_used_backends());
         }
@@ -37,7 +34,6 @@ impl EnvelopeConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct ListEnvelopesConfig {
     pub backend: Option<BackendKind>,
@@ -46,7 +42,6 @@ pub struct ListEnvelopesConfig {
     pub remote: email::envelope::list::config::EnvelopeListConfig,
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 impl ListEnvelopesConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -59,7 +54,6 @@ impl ListEnvelopesConfig {
     }
 }
 
-#[cfg(feature = "envelope-watch")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct WatchEnvelopesConfig {
     pub backend: Option<BackendKind>,
@@ -68,7 +62,6 @@ pub struct WatchEnvelopesConfig {
     pub remote: email::envelope::watch::config::WatchEnvelopeConfig,
 }
 
-#[cfg(feature = "envelope-watch")]
 impl WatchEnvelopesConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -81,13 +74,11 @@ impl WatchEnvelopesConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-get"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct GetEnvelopeConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-get"))]
 impl GetEnvelopeConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();

src/email/envelope/flag/command/add.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -51,7 +52,7 @@ impl FlagAddCommand {
             toml_account_config.clone(),
             account_config,
             add_flags_kind,
-            |builder| builder.set_add_flags(Some(None)),
+            |builder| builder.set_add_flags(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/envelope/flag/command/mod.rs

@@ -1,8 +1,5 @@
-#[cfg(feature = "flag-add")]
 mod add;
-#[cfg(feature = "flag-remove")]
 mod remove;
-#[cfg(feature = "flag-set")]
 mod set;
 
 use anyhow::Result;
@@ -10,12 +7,7 @@ use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "flag-add")]
+use self::{add::FlagAddCommand, remove::FlagRemoveCommand, set::FlagSetCommand};
-use self::add::FlagAddCommand;
-#[cfg(feature = "flag-remove")]
-use self::remove::FlagRemoveCommand;
-#[cfg(feature = "flag-set")]
-use self::set::FlagSetCommand;
 
 /// Manage flags.
 ///
@@ -25,17 +17,14 @@ use self::set::FlagSetCommand;
 /// synchronization does not take care of them yet).
 #[derive(Debug, Subcommand)]
 pub enum FlagSubcommand {
-    #[cfg(feature = "flag-add")]
     #[command(arg_required_else_help = true)]
     #[command(alias = "create")]
     Add(FlagAddCommand),
 
-    #[cfg(feature = "flag-set")]
     #[command(arg_required_else_help = true)]
     #[command(aliases = ["update", "change", "replace"])]
     Set(FlagSetCommand),
 
-    #[cfg(feature = "flag-remove")]
     #[command(arg_required_else_help = true)]
     #[command(aliases = ["rm", "delete", "del"])]
     Remove(FlagRemoveCommand),
@@ -45,11 +34,8 @@ impl FlagSubcommand {
     #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "flag-add")]
             Self::Add(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "flag-set")]
             Self::Set(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "flag-remove")]
             Self::Remove(cmd) => cmd.execute(printer, config).await,
         }
     }

src/email/envelope/flag/command/remove.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -51,7 +52,7 @@ impl FlagRemoveCommand {
             toml_account_config.clone(),
             account_config,
             remove_flags_kind,
-            |builder| builder.set_remove_flags(Some(None)),
+            |builder| builder.set_remove_flags(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/envelope/flag/command/set.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -51,7 +52,7 @@ impl FlagSetCommand {
             toml_account_config.clone(),
             account_config,
             set_flags_kind,
-            |builder| builder.set_set_flags(Some(None)),
+            |builder| builder.set_set_flags(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/envelope/flag/config.rs

@@ -1,3 +1,5 @@
+#[cfg(feature = "account-sync")]
+use email::flag::sync::config::FlagSyncConfig;
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 
@@ -5,30 +7,25 @@ use crate::backend::BackendKind;
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FlagConfig {
-    #[cfg(feature = "flag-add")]
     pub add: Option<FlagAddConfig>,
-    #[cfg(feature = "flag-set")]
     pub set: Option<FlagSetConfig>,
-    #[cfg(feature = "flag-remove")]
     pub remove: Option<FlagRemoveConfig>,
+    #[cfg(feature = "account-sync")]
+    pub sync: Option<FlagSyncConfig>,
 }
 
 impl FlagConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
-        #[allow(unused_mut)]
         let mut kinds = HashSet::default();
 
-        #[cfg(feature = "flag-add")]
         if let Some(add) = &self.add {
             kinds.extend(add.get_used_backends());
         }
 
-        #[cfg(feature = "flag-set")]
         if let Some(set) = &self.set {
             kinds.extend(set.get_used_backends());
         }
 
-        #[cfg(feature = "flag-remove")]
         if let Some(remove) = &self.remove {
             kinds.extend(remove.get_used_backends());
         }
@@ -37,13 +34,11 @@ impl FlagConfig {
     }
 }
 
-#[cfg(feature = "flag-add")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FlagAddConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(feature = "flag-add")]
 impl FlagAddConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -56,13 +51,11 @@ impl FlagAddConfig {
     }
 }
 
-#[cfg(feature = "flag-set")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FlagSetConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(feature = "flag-set")]
 impl FlagSetConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -75,13 +68,11 @@ impl FlagSetConfig {
     }
 }
 
-#[cfg(feature = "flag-remove")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FlagRemoveConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(feature = "flag-remove")]
 impl FlagRemoveConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();

src/email/envelope/mod.rs

@@ -30,7 +30,6 @@ pub struct Envelope {
     pub date: String,
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 impl Table for Envelope {
     fn head() -> Row {
         Row::new()
@@ -76,12 +75,10 @@ impl Table for Envelope {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 /// Represents the list of envelopes.
 #[derive(Clone, Debug, Default, Serialize)]
 pub struct Envelopes(Vec<Envelope>);
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 impl Envelopes {
     pub fn from_backend(
         config: &AccountConfig,
@@ -108,7 +105,6 @@ impl Envelopes {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 impl ops::Deref for Envelopes {
     type Target = Vec<Envelope>;
 
@@ -117,7 +113,6 @@ impl ops::Deref for Envelopes {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "envelope-list"))]
 impl PrintTable for Envelopes {
     fn print_table(&self, writer: &mut dyn WriteColor, opts: PrintTableOpts) -> Result<()> {
         writeln!(writer)?;

src/email/message/attachment/command/download.rs

@@ -1,5 +1,6 @@
 use anyhow::{Context, Result};
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 use std::{fs, path::PathBuf};
 use uuid::Uuid;
@@ -51,7 +52,7 @@ impl AttachmentDownloadCommand {
             toml_account_config.clone(),
             account_config.clone(),
             get_messages_kind,
-            |builder| builder.set_get_messages(Some(None)),
+            |builder| builder.set_get_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/attachment/command/mod.rs

@@ -1,12 +1,10 @@
-#[cfg(feature = "attachment-download")]
+mod download;
-pub mod download;
 
 use anyhow::Result;
 use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "attachment-download")]
 use self::download::AttachmentDownloadCommand;
 
 /// Manage attachments.
@@ -16,16 +14,13 @@ use self::download::AttachmentDownloadCommand;
 /// body.
 #[derive(Debug, Subcommand)]
 pub enum AttachmentSubcommand {
-    #[cfg(feature = "attachment-download")]
     #[command(arg_required_else_help = true)]
     Download(AttachmentDownloadCommand),
 }
 
 impl AttachmentSubcommand {
-    #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "attachment-download")]
             Self::Download(cmd) => cmd.execute(printer, config).await,
         }
     }

src/email/message/command/copy.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -53,7 +54,7 @@ impl MessageCopyCommand {
             toml_account_config.clone(),
             account_config,
             copy_messages_kind,
-            |builder| builder.set_copy_messages(Some(None)),
+            |builder| builder.set_copy_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/command/delete.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -51,7 +52,7 @@ impl MessageDeleteCommand {
             toml_account_config.clone(),
             account_config,
             delete_messages_kind,
-            |builder| builder.set_delete_messages(Some(None)),
+            |builder| builder.set_delete_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/command/forward.rs

@@ -1,5 +1,6 @@
 use anyhow::{anyhow, Result};
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -63,8 +64,8 @@ impl MessageForwardCommand {
             account_config.clone(),
             add_message_kind.into_iter().chain(send_message_kind),
             |builder| {
-                builder.set_add_message(Some(None));
+                builder.set_add_message(BackendFeatureSource::Context);
-                builder.set_send_message(Some(None));
+                builder.set_send_message(BackendFeatureSource::Context);
             },
         )
         .await?;

src/email/message/command/mailto.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::{debug, info};
 use mail_builder::MessageBuilder;
 use url::Url;
@@ -58,8 +59,8 @@ impl MessageMailtoCommand {
             account_config.clone(),
             add_message_kind.into_iter().chain(send_message_kind),
             |builder| {
-                builder.set_add_message(Some(None));
+                builder.set_add_message(BackendFeatureSource::Context);
-                builder.set_send_message(Some(None));
+                builder.set_send_message(BackendFeatureSource::Context);
             },
         )
         .await?;

src/email/message/command/mod.rs

@@ -1,22 +1,12 @@
-#[cfg(feature = "message-copy")]
 pub mod copy;
-#[cfg(feature = "message-delete")]
 pub mod delete;
-#[cfg(feature = "message-forward")]
 pub mod forward;
-#[cfg(feature = "message-mailto")]
 pub mod mailto;
-#[cfg(feature = "message-move")]
 pub mod r#move;
-#[cfg(feature = "message-read")]
 pub mod read;
-#[cfg(feature = "message-reply")]
 pub mod reply;
-#[cfg(feature = "message-save")]
 pub mod save;
-#[cfg(feature = "message-send")]
 pub mod send;
-#[cfg(feature = "message-write")]
 pub mod write;
 
 use anyhow::Result;
@@ -24,26 +14,12 @@ use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "message-copy")]
+use self::{
-use self::copy::MessageCopyCommand;
+    copy::MessageCopyCommand, delete::MessageDeleteCommand, forward::MessageForwardCommand,
-#[cfg(feature = "message-delete")]
+    mailto::MessageMailtoCommand, r#move::MessageMoveCommand, read::MessageReadCommand,
-use self::delete::MessageDeleteCommand;
+    reply::MessageReplyCommand, save::MessageSaveCommand, send::MessageSendCommand,
-#[cfg(feature = "message-forward")]
+    write::MessageWriteCommand,
-use self::forward::MessageForwardCommand;
+};
-#[cfg(feature = "message-mailto")]
-use self::mailto::MessageMailtoCommand;
-#[cfg(feature = "message-move")]
-use self::r#move::MessageMoveCommand;
-#[cfg(feature = "message-read")]
-use self::read::MessageReadCommand;
-#[cfg(feature = "message-reply")]
-use self::reply::MessageReplyCommand;
-#[cfg(feature = "message-save")]
-use self::save::MessageSaveCommand;
-#[cfg(feature = "message-send")]
-use self::send::MessageSendCommand;
-#[cfg(feature = "message-write")]
-use self::write::MessageWriteCommand;
 
 /// Manage messages.
 ///
@@ -53,43 +29,33 @@ use self::write::MessageWriteCommand;
 /// subcommand allows you to manage them.
 #[derive(Debug, Subcommand)]
 pub enum MessageSubcommand {
-    #[cfg(feature = "message-read")]
     #[command(arg_required_else_help = true)]
     Read(MessageReadCommand),
 
-    #[cfg(feature = "message-write")]
     #[command(aliases = ["add", "create", "new", "compose"])]
     Write(MessageWriteCommand),
 
-    #[cfg(feature = "message-reply")]
     #[command()]
     Reply(MessageReplyCommand),
 
-    #[cfg(feature = "message-forward")]
     #[command(aliases = ["fwd", "fd"])]
     Forward(MessageForwardCommand),
 
-    #[cfg(feature = "message-mailto")]
     #[command()]
     Mailto(MessageMailtoCommand),
 
-    #[cfg(feature = "message-save")]
     Save(MessageSaveCommand),
 
-    #[cfg(feature = "message-send")]
     Send(MessageSendCommand),
 
-    #[cfg(feature = "message-copy")]
     #[command(arg_required_else_help = true)]
     #[command(aliases = ["cpy", "cp"])]
     Copy(MessageCopyCommand),
 
-    #[cfg(feature = "message-move")]
     #[command(arg_required_else_help = true)]
     #[command(alias = "mv")]
     Move(MessageMoveCommand),
 
-    #[cfg(feature = "message-delete")]
     #[command(arg_required_else_help = true)]
     #[command(aliases = ["remove", "rm"])]
     Delete(MessageDeleteCommand),
@@ -99,25 +65,15 @@ impl MessageSubcommand {
     #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "message-read")]
             Self::Read(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-write")]
             Self::Write(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-reply")]
             Self::Reply(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-forward")]
             Self::Forward(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-mailto")]
             Self::Mailto(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-save")]
             Self::Save(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-send")]
             Self::Send(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-copy")]
             Self::Copy(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-move")]
             Self::Move(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "message-delete")]
             Self::Delete(cmd) => cmd.execute(printer, config).await,
         }
     }

src/email/message/command/move.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -54,7 +55,7 @@ impl MessageMoveCommand {
             toml_account_config.clone(),
             account_config,
             move_messages_kind,
-            |builder| builder.set_move_messages(Some(None)),
+            |builder| builder.set_move_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/command/read.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 use mml::message::FilterParts;
 
@@ -96,7 +97,7 @@ impl MessageReadCommand {
             toml_account_config.clone(),
             account_config.clone(),
             get_messages_kind,
-            |builder| builder.set_get_messages(Some(None)),
+            |builder| builder.set_get_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/command/reply.rs

@@ -1,5 +1,6 @@
 use anyhow::{anyhow, Result};
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -65,8 +66,8 @@ impl MessageReplyCommand {
             account_config.clone(),
             add_message_kind.into_iter().chain(send_message_kind),
             |builder| {
-                builder.set_add_message(Some(None));
+                builder.set_add_message(BackendFeatureSource::Context);
-                builder.set_send_message(Some(None));
+                builder.set_send_message(BackendFeatureSource::Context);
             },
         )
         .await?;

src/email/message/command/save.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 use std::io::{self, BufRead, IsTerminal};
 
@@ -48,7 +49,7 @@ impl MessageSaveCommand {
             toml_account_config.clone(),
             account_config,
             add_message_kind,
-            |builder| builder.set_add_message(Some(None)),
+            |builder| builder.set_add_message(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/command/send.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::{backend::feature::BackendFeatureSource, message::send::SendMessageThenSaveCopy};
 use log::info;
 use std::io::{self, BufRead, IsTerminal};
 
@@ -37,10 +38,7 @@ impl MessageSendCommand {
             self.cache.disable,
         )?;
 
-        let send_message_kind = toml_account_config.send_message_kind();
+        let send_message_kind = toml_account_config.send_message_kind().into_iter().chain(
-
-        #[cfg(feature = "message-add")]
-        let send_message_kind = send_message_kind.into_iter().chain(
             toml_account_config
                 .add_message_kind()
                 .filter(|_| account_config.should_save_copy_sent_message()),
@@ -51,9 +49,8 @@ impl MessageSendCommand {
             account_config,
             send_message_kind,
             |builder| {
-                builder.set_send_message(Some(None));
+                builder.set_send_message(BackendFeatureSource::Context);
-                #[cfg(feature = "message-add")]
+                builder.set_add_message(BackendFeatureSource::Context);
-                builder.set_add_message(Some(None));
             },
         )
         .await?;
@@ -69,7 +66,7 @@ impl MessageSendCommand {
                 .join("\r\n")
         };
 
-        backend.send_message(msg.as_bytes()).await?;
+        backend.send_message_then_save_copy(msg.as_bytes()).await?;
 
         printer.print("Message successfully sent!")
     }

src/email/message/command/write.rs

@@ -1,6 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
-use email::message::Message;
+use email::{backend::feature::BackendFeatureSource, message::Message};
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -54,8 +54,8 @@ impl MessageWriteCommand {
             account_config.clone(),
             add_message_kind.into_iter().chain(send_message_kind),
             |builder| {
-                builder.set_add_message(Some(None));
+                builder.set_add_message(BackendFeatureSource::Context);
-                builder.set_send_message(Some(None));
+                builder.set_send_message(BackendFeatureSource::Context);
             },
         )
         .await?;

src/email/message/config.rs

@@ -1,3 +1,5 @@
+#[cfg(feature = "account-sync")]
+use email::message::sync::config::MessageSyncConfig;
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 
@@ -5,53 +7,41 @@ use crate::backend::BackendKind;
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageConfig {
-    #[cfg(any(feature = "account-sync", feature = "message-add"))]
     pub write: Option<MessageAddConfig>,
-    #[cfg(any(feature = "message-send", feature = "template-send"))]
     pub send: Option<MessageSendConfig>,
-    #[cfg(feature = "account-sync")]
     pub peek: Option<MessagePeekConfig>,
-    #[cfg(any(feature = "account-sync", feature = "message-get"))]
     pub read: Option<MessageGetConfig>,
-    #[cfg(feature = "message-copy")]
     pub copy: Option<MessageCopyConfig>,
-    #[cfg(any(feature = "account-sync", feature = "message-move"))]
     pub r#move: Option<MessageMoveConfig>,
-    #[cfg(feature = "message-delete")]
     pub delete: Option<MessageDeleteConfig>,
+    #[cfg(feature = "account-sync")]
+    pub sync: Option<MessageSyncConfig>,
 }
 
 impl MessageConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
-        #[allow(unused_mut)]
         let mut kinds = HashSet::default();
 
-        #[cfg(any(feature = "account-sync", feature = "message-add"))]
         if let Some(add) = &self.write {
             kinds.extend(add.get_used_backends());
         }
 
-        #[cfg(any(feature = "message-send", feature = "template-send"))]
         if let Some(send) = &self.send {
             kinds.extend(send.get_used_backends());
         }
 
-        #[cfg(feature = "account-sync")]
         if let Some(peek) = &self.peek {
             kinds.extend(peek.get_used_backends());
         }
 
-        #[cfg(any(feature = "account-sync", feature = "message-get"))]
         if let Some(get) = &self.read {
             kinds.extend(get.get_used_backends());
         }
 
-        #[cfg(feature = "message-copy")]
         if let Some(copy) = &self.copy {
             kinds.extend(copy.get_used_backends());
         }
 
-        #[cfg(any(feature = "account-sync", feature = "message-move"))]
         if let Some(move_) = &self.r#move {
             kinds.extend(move_.get_used_backends());
         }
@@ -60,7 +50,6 @@ impl MessageConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-add"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageAddConfig {
     pub backend: Option<BackendKind>,
@@ -69,7 +58,6 @@ pub struct MessageAddConfig {
     pub remote: email::message::add::config::MessageWriteConfig,
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-add"))]
 impl MessageAddConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -82,7 +70,6 @@ impl MessageAddConfig {
     }
 }
 
-#[cfg(any(feature = "message-send", feature = "template-send"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageSendConfig {
     pub backend: Option<BackendKind>,
@@ -91,7 +78,6 @@ pub struct MessageSendConfig {
     pub remote: email::message::send::config::MessageSendConfig,
 }
 
-#[cfg(any(feature = "message-send", feature = "template-send"))]
 impl MessageSendConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -104,13 +90,11 @@ impl MessageSendConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-peek"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessagePeekConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-peek"))]
 impl MessagePeekConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -123,7 +107,6 @@ impl MessagePeekConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-get"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageGetConfig {
     pub backend: Option<BackendKind>,
@@ -132,7 +115,6 @@ pub struct MessageGetConfig {
     pub remote: email::message::get::config::MessageReadConfig,
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-get"))]
 impl MessageGetConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -145,13 +127,11 @@ impl MessageGetConfig {
     }
 }
 
-#[cfg(feature = "message-copy")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageCopyConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(feature = "message-copy")]
 impl MessageCopyConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -164,13 +144,11 @@ impl MessageCopyConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-move"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageMoveConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(any(feature = "account-sync", feature = "message-move"))]
 impl MessageMoveConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -183,13 +161,11 @@ impl MessageMoveConfig {
     }
 }
 
-#[cfg(feature = "message-delete")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct MessageDeleteConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(feature = "message-delete")]
 impl MessageDeleteConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();

src/email/message/template/command/forward.rs

@@ -1,5 +1,6 @@
 use anyhow::{anyhow, Result};
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -59,7 +60,7 @@ impl TemplateForwardCommand {
             toml_account_config.clone(),
             account_config.clone(),
             get_messages_kind,
-            |builder| builder.set_get_messages(Some(None)),
+            |builder| builder.set_get_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/template/command/mod.rs

@@ -1,29 +1,18 @@
-#[cfg(feature = "template-forward")]
+mod forward;
-pub mod forward;
+mod reply;
-#[cfg(feature = "template-reply")]
+mod save;
-pub mod reply;
+mod send;
-#[cfg(feature = "template-save")]
+mod write;
-pub mod save;
-#[cfg(feature = "template-send")]
-pub mod send;
-#[cfg(feature = "template-write")]
-pub mod write;
 
 use anyhow::Result;
 use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "template-forward")]
+use self::{
-use self::forward::TemplateForwardCommand;
+    forward::TemplateForwardCommand, reply::TemplateReplyCommand, save::TemplateSaveCommand,
-#[cfg(feature = "template-reply")]
+    send::TemplateSendCommand, write::TemplateWriteCommand,
-use self::reply::TemplateReplyCommand;
+};
-#[cfg(feature = "template-save")]
-use self::save::TemplateSaveCommand;
-#[cfg(feature = "template-send")]
-use self::send::TemplateSendCommand;
-#[cfg(feature = "template-write")]
-use self::write::TemplateWriteCommand;
 
 /// Manage templates.
 ///
@@ -36,41 +25,30 @@ use self::write::TemplateWriteCommand;
 /// <https://crates.io/crates/mml-lib>.
 #[derive(Debug, Subcommand)]
 pub enum TemplateSubcommand {
-    #[cfg(feature = "template-write")]
     #[command(aliases = ["add", "create", "new", "compose"])]
     Write(TemplateWriteCommand),
 
-    #[cfg(feature = "template-reply")]
     #[command(arg_required_else_help = true)]
     Reply(TemplateReplyCommand),
 
-    #[cfg(feature = "template-forward")]
     #[command(arg_required_else_help = true)]
     #[command(alias = "fwd")]
     Forward(TemplateForwardCommand),
 
-    #[cfg(feature = "template-save")]
     #[command()]
     Save(TemplateSaveCommand),
 
-    #[cfg(feature = "template-send")]
     #[command()]
     Send(TemplateSendCommand),
 }
 
 impl TemplateSubcommand {
-    #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "template-write")]
             Self::Write(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "template-reply")]
             Self::Reply(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "template-forward")]
             Self::Forward(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "template-save")]
             Self::Save(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "template-send")]
             Self::Send(cmd) => cmd.execute(printer, config).await,
         }
     }

src/email/message/template/command/reply.rs

@@ -1,5 +1,6 @@
 use anyhow::{anyhow, Result};
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -64,7 +65,7 @@ impl TemplateReplyCommand {
             toml_account_config.clone(),
             account_config.clone(),
             get_messages_kind,
-            |builder| builder.set_get_messages(Some(None)),
+            |builder| builder.set_get_messages(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/template/command/save.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::backend::feature::BackendFeatureSource;
 use log::info;
 use mml::MmlCompilerBuilder;
 use std::io::{self, BufRead, IsTerminal};
@@ -52,7 +53,7 @@ impl TemplateSaveCommand {
             toml_account_config.clone(),
             account_config.clone(),
             add_message_kind,
-            |builder| builder.set_add_message(Some(None)),
+            |builder| builder.set_add_message(BackendFeatureSource::Context),
         )
         .await?;
 

src/email/message/template/command/send.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::{backend::feature::BackendFeatureSource, message::send::SendMessageThenSaveCopy};
 use log::info;
 use mml::MmlCompilerBuilder;
 use std::io::{self, BufRead, IsTerminal};
@@ -40,10 +41,7 @@ impl TemplateSendCommand {
             self.cache.disable,
         )?;
 
-        let send_message_kind = toml_account_config.send_message_kind();
+        let send_message_kind = toml_account_config.send_message_kind().into_iter().chain(
-
-        #[cfg(feature = "message-add")]
-        let send_message_kind = send_message_kind.into_iter().chain(
             toml_account_config
                 .add_message_kind()
                 .filter(|_| account_config.should_save_copy_sent_message()),
@@ -54,9 +52,8 @@ impl TemplateSendCommand {
             account_config.clone(),
             send_message_kind,
             |builder| {
-                builder.set_send_message(Some(None));
+                builder.set_send_message(BackendFeatureSource::Context);
-                #[cfg(feature = "message-add")]
+                builder.set_add_message(BackendFeatureSource::Context);
-                builder.set_add_message(Some(None));
             },
         )
         .await?;
@@ -80,7 +77,7 @@ impl TemplateSendCommand {
 
         let msg = compiler.build(tpl.as_str())?.compile().await?.into_vec()?;
 
-        backend.send_message(&msg).await?;
+        backend.send_message_then_save_copy(&msg).await?;
 
         printer.print("Message successfully sent!")
     }

src/folder/command/add.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::{backend::feature::BackendFeatureSource, folder::add::AddFolder};
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -43,7 +44,7 @@ impl AddFolderCommand {
             toml_account_config.clone(),
             account_config,
             add_folder_kind,
-            |builder| builder.set_add_folder(Some(None)),
+            |builder| builder.set_add_folder(BackendFeatureSource::Context),
         )
         .await?;
 

src/folder/command/delete.rs

@@ -1,6 +1,7 @@
 use anyhow::Result;
 use clap::Parser;
 use dialoguer::Confirm;
+use email::{backend::feature::BackendFeatureSource, folder::delete::DeleteFolder};
 use log::info;
 use std::process;
 
@@ -56,7 +57,7 @@ impl FolderDeleteCommand {
             toml_account_config.clone(),
             account_config,
             delete_folder_kind,
-            |builder| builder.set_delete_folder(Some(None)),
+            |builder| builder.set_delete_folder(BackendFeatureSource::Context),
         )
         .await?;
 

src/folder/command/expunge.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::{backend::feature::BackendFeatureSource, folder::expunge::ExpungeFolder};
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -44,7 +45,7 @@ impl FolderExpungeCommand {
             toml_account_config.clone(),
             account_config,
             expunge_folder_kind,
-            |builder| builder.set_expunge_folder(Some(None)),
+            |builder| builder.set_expunge_folder(BackendFeatureSource::Context),
         )
         .await?;
 

src/folder/command/list.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use clap::Parser;
+use email::{backend::feature::BackendFeatureSource, folder::list::ListFolders};
 use log::info;
 
 #[cfg(feature = "account-sync")]
@@ -45,7 +46,7 @@ impl FolderListCommand {
             toml_account_config.clone(),
             account_config.clone(),
             list_folders_kind,
-            |builder| builder.set_list_folders(Some(None)),
+            |builder| builder.set_list_folders(BackendFeatureSource::Context),
         )
         .await?;
 

src/folder/command/mod.rs

@@ -1,12 +1,7 @@
-#[cfg(feature = "folder-add")]
 mod add;
-#[cfg(feature = "folder-delete")]
 mod delete;
-#[cfg(feature = "folder-expunge")]
 mod expunge;
-#[cfg(feature = "folder-list")]
 mod list;
-#[cfg(feature = "folder-purge")]
 mod purge;
 
 use anyhow::Result;
@@ -14,16 +9,10 @@ use clap::Subcommand;
 
 use crate::{config::TomlConfig, printer::Printer};
 
-#[cfg(feature = "folder-add")]
+use self::{
-use self::add::AddFolderCommand;
+    add::AddFolderCommand, delete::FolderDeleteCommand, expunge::FolderExpungeCommand,
-#[cfg(feature = "folder-delete")]
+    list::FolderListCommand, purge::FolderPurgeCommand,
-use self::delete::FolderDeleteCommand;
+};
-#[cfg(feature = "folder-expunge")]
-use self::expunge::FolderExpungeCommand;
-#[cfg(feature = "folder-list")]
-use self::list::FolderListCommand;
-#[cfg(feature = "folder-purge")]
-use self::purge::FolderPurgeCommand;
 
 /// Manage folders.
 ///
@@ -31,23 +20,18 @@ use self::purge::FolderPurgeCommand;
 /// emails. This subcommand allows you to manage them.
 #[derive(Debug, Subcommand)]
 pub enum FolderSubcommand {
-    #[cfg(feature = "folder-add")]
     #[command(visible_alias = "create", alias = "new")]
     Add(AddFolderCommand),
 
-    #[cfg(feature = "folder-list")]
     #[command(alias = "lst")]
     List(FolderListCommand),
 
-    #[cfg(feature = "folder-expunge")]
     #[command()]
     Expunge(FolderExpungeCommand),
 
-    #[cfg(feature = "folder-purge")]
     #[command()]
     Purge(FolderPurgeCommand),
 
-    #[cfg(feature = "folder-delete")]
     #[command(alias = "remove", alias = "rm")]
     Delete(FolderDeleteCommand),
 }
@@ -56,15 +40,10 @@ impl FolderSubcommand {
     #[allow(unused)]
     pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
         match self {
-            #[cfg(feature = "folder-add")]
             Self::Add(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "folder-list")]
             Self::List(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "folder-expunge")]
             Self::Expunge(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "folder-purge")]
             Self::Purge(cmd) => cmd.execute(printer, config).await,
-            #[cfg(feature = "folder-delete")]
             Self::Delete(cmd) => cmd.execute(printer, config).await,
         }
     }

src/folder/command/purge.rs

@@ -1,6 +1,7 @@
 use anyhow::Result;
 use clap::Parser;
 use dialoguer::Confirm;
+use email::{backend::feature::BackendFeatureSource, folder::purge::PurgeFolder};
 use log::info;
 use std::process;
 
@@ -56,7 +57,7 @@ impl FolderPurgeCommand {
             toml_account_config.clone(),
             account_config,
             purge_folder_kind,
-            |builder| builder.set_purge_folder(Some(None)),
+            |builder| builder.set_purge_folder(BackendFeatureSource::Context),
         )
         .await?;
 

src/folder/config.rs

@@ -1,3 +1,5 @@
+#[cfg(feature = "account-sync")]
+use email::folder::sync::config::FolderSyncConfig;
 use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, HashSet};
 
@@ -7,45 +9,35 @@ use crate::backend::BackendKind;
 pub struct FolderConfig {
     #[serde(alias = "aliases")]
     pub alias: Option<HashMap<String, String>>,
-
-    #[cfg(any(feature = "account-sync", feature = "folder-add"))]
     pub add: Option<FolderAddConfig>,
-    #[cfg(any(feature = "account-sync", feature = "folder-list"))]
     pub list: Option<FolderListConfig>,
-    #[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
     pub expunge: Option<FolderExpungeConfig>,
-    #[cfg(feature = "folder-purge")]
     pub purge: Option<FolderPurgeConfig>,
-    #[cfg(any(feature = "account-sync", feature = "folder-delete"))]
     pub delete: Option<FolderDeleteConfig>,
+    #[cfg(feature = "account-sync")]
+    pub sync: Option<FolderSyncConfig>,
 }
 
 impl FolderConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
-        #[allow(unused_mut)]
         let mut kinds = HashSet::default();
 
-        #[cfg(any(feature = "account-sync", feature = "folder-add"))]
         if let Some(add) = &self.add {
             kinds.extend(add.get_used_backends());
         }
 
-        #[cfg(any(feature = "account-sync", feature = "folder-list"))]
         if let Some(list) = &self.list {
             kinds.extend(list.get_used_backends());
         }
 
-        #[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
         if let Some(expunge) = &self.expunge {
             kinds.extend(expunge.get_used_backends());
         }
 
-        #[cfg(feature = "folder-purge")]
         if let Some(purge) = &self.purge {
             kinds.extend(purge.get_used_backends());
         }
 
-        #[cfg(any(feature = "account-sync", feature = "folder-delete"))]
         if let Some(delete) = &self.delete {
             kinds.extend(delete.get_used_backends());
         }
@@ -54,13 +46,11 @@ impl FolderConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-add"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FolderAddConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-add"))]
 impl FolderAddConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -73,7 +63,6 @@ impl FolderAddConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-list"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FolderListConfig {
     pub backend: Option<BackendKind>,
@@ -82,7 +71,6 @@ pub struct FolderListConfig {
     pub remote: email::folder::list::config::FolderListConfig,
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-list"))]
 impl FolderListConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -95,13 +83,11 @@ impl FolderListConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FolderExpungeConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-expunge"))]
 impl FolderExpungeConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -114,13 +100,11 @@ impl FolderExpungeConfig {
     }
 }
 
-#[cfg(feature = "folder-purge")]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FolderPurgeConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(feature = "folder-purge")]
 impl FolderPurgeConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();
@@ -133,13 +117,11 @@ impl FolderPurgeConfig {
     }
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-delete"))]
 #[derive(Clone, Debug, Default, Eq, PartialEq, Deserialize, Serialize)]
 pub struct FolderDeleteConfig {
     pub backend: Option<BackendKind>,
 }
 
-#[cfg(any(feature = "account-sync", feature = "folder-delete"))]
 impl FolderDeleteConfig {
     pub fn get_used_backends(&self) -> HashSet<&BackendKind> {
         let mut kinds = HashSet::default();

src/folder/mod.rs

@@ -1,29 +1,22 @@
 pub mod arg;
-#[cfg(feature = "folder-subcmd")]
 pub mod command;
 pub mod config;
 
-#[cfg(feature = "folder-subcmd")]
 use anyhow::Result;
-#[cfg(feature = "folder-subcmd")]
 use serde::Serialize;
-#[cfg(feature = "folder-subcmd")]
 use std::ops;
 
-#[cfg(feature = "folder-subcmd")]
 use crate::{
     printer::{PrintTable, PrintTableOpts, WriteColor},
     ui::{Cell, Row, Table},
 };
 
-#[cfg(feature = "folder-subcmd")]
 #[derive(Clone, Debug, Default, Serialize)]
 pub struct Folder {
     pub name: String,
     pub desc: String,
 }
 
-#[cfg(feature = "folder-subcmd")]
 impl From<&email::folder::Folder> for Folder {
     fn from(folder: &email::folder::Folder) -> Self {
         Folder {
@@ -33,7 +26,6 @@ impl From<&email::folder::Folder> for Folder {
     }
 }
 
-#[cfg(feature = "folder-subcmd")]
 impl Table for Folder {
     fn head() -> Row {
         Row::new()
@@ -48,11 +40,9 @@ impl Table for Folder {
     }
 }
 
-#[cfg(feature = "folder-subcmd")]
 #[derive(Clone, Debug, Default, Serialize)]
 pub struct Folders(Vec<Folder>);
 
-#[cfg(feature = "folder-subcmd")]
 impl ops::Deref for Folders {
     type Target = Vec<Folder>;
 
@@ -61,14 +51,12 @@ impl ops::Deref for Folders {
     }
 }
 
-#[cfg(feature = "folder-subcmd")]
 impl From<email::folder::Folders> for Folders {
     fn from(folders: email::folder::Folders) -> Self {
         Folders(folders.iter().map(Folder::from).collect())
     }
 }
 
-#[cfg(feature = "folder-subcmd")]
 impl PrintTable for Folders {
     fn print_table(&self, writer: &mut dyn WriteColor, opts: PrintTableOpts) -> Result<()> {
         writeln!(writer)?;

src/imap/mod.rs

@@ -1,2 +1 @@
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;

src/maildir/mod.rs

@@ -1,2 +1 @@
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;

src/main.rs

@@ -1,21 +1,18 @@
 use anyhow::Result;
 use clap::Parser;
 use env_logger::{Builder as LoggerBuilder, Env, DEFAULT_FILTER_ENV};
-#[cfg(any(feature = "envelope-list", feature = "message-mailto"))]
+use himalaya::{
-use himalaya::config::TomlConfig;
+    cli::Cli, config::TomlConfig, envelope::command::list::ListEnvelopesCommand,
-#[cfg(feature = "envelope-list")]
+    message::command::mailto::MessageMailtoCommand, printer::StdoutPrinter,
-use himalaya::envelope::command::list::ListEnvelopesCommand;
+};
-#[cfg(feature = "message-mailto")]
+use log::{debug, trace};
-use himalaya::message::command::mailto::MessageMailtoCommand;
-use himalaya::{cli::Cli, printer::StdoutPrinter};
-use log::{debug, warn};
 
 #[tokio::main]
 async fn main() -> Result<()> {
     #[cfg(not(target_os = "windows"))]
     if let Err((_, err)) = coredump::register_panic_handler() {
-        warn!("cannot register coredump panic handler: {err}");
+        debug!("cannot register coredump panic handler: {err}");
-        debug!("{err:?}");
+        trace!("{err:?}");
     }
 
     LoggerBuilder::new()
@@ -23,7 +20,6 @@ async fn main() -> Result<()> {
         .format_timestamp(None)
         .init();
 
-    #[cfg(feature = "message-mailto")]
     // if the first argument starts by "mailto:", execute straight the
     // mailto message command
     if let Some(ref url) = std::env::args()
@@ -41,20 +37,13 @@ async fn main() -> Result<()> {
     let cli = Cli::parse();
     let mut printer = StdoutPrinter::new(cli.output, cli.color);
 
-    #[cfg(feature = "envelope-list")]
     match cli.command {
-        Some(cmd) => return cmd.execute(&mut printer, cli.config_path.as_ref()).await,
+        Some(cmd) => cmd.execute(&mut printer, cli.config_path.as_ref()).await,
         None => {
             let config = TomlConfig::from_some_path_or_default(cli.config_path.as_ref()).await?;
-            return ListEnvelopesCommand::default()
+            ListEnvelopesCommand::default()
                 .execute(&mut printer, &config)
-                .await;
+                .await
         }
     }
-
-    #[cfg(not(feature = "envelope-list"))]
-    return cli
-        .command
-        .execute(&mut printer, cli.config_path.as_ref())
-        .await;
 }

src/notmuch/mod.rs

@@ -1,2 +1 @@
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;

src/sendmail/mod.rs

@@ -1,2 +1 @@
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;

src/smtp/mod.rs

@@ -1,2 +1 @@
-#[cfg(feature = "wizard")]
 pub(crate) mod wizard;

src/ui/choice.rs

@@ -38,11 +38,9 @@ pub fn pre_edit() -> Result<PreEditChoice> {
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum PostEditChoice {
-    #[cfg(feature = "message-send")]
     Send,
     Edit,
     LocalDraft,
-    #[cfg(feature = "message-add")]
     RemoteDraft,
     Discard,
 }
@@ -50,11 +48,9 @@ pub enum PostEditChoice {
 impl ToString for PostEditChoice {
     fn to_string(&self) -> String {
         match self {
-            #[cfg(feature = "message-send")]
             Self::Send => "Send it".into(),
             Self::Edit => "Edit it again".into(),
             Self::LocalDraft => "Save it as local draft".into(),
-            #[cfg(feature = "message-add")]
             Self::RemoteDraft => "Save it as remote draft".into(),
             Self::Discard => "Discard it".into(),
         }
@@ -63,11 +59,9 @@ impl ToString for PostEditChoice {
 
 pub fn post_edit() -> Result<PostEditChoice> {
     let choices = [
-        #[cfg(feature = "message-send")]
         PostEditChoice::Send,
         PostEditChoice::Edit,
         PostEditChoice::LocalDraft,
-        #[cfg(feature = "message-add")]
         PostEditChoice::RemoteDraft,
         PostEditChoice::Discard,
     ];

src/ui/editor.rs

@@ -2,14 +2,11 @@ use anyhow::{Context, Result};
 use email::{
     account::config::AccountConfig,
     email::utils::{local_draft_path, remove_local_draft},
-};
-#[cfg(feature = "message-add")]
-use email::{
     flag::{Flag, Flags},
     folder::DRAFTS,
+    message::{add::AddMessage, send::SendMessageThenSaveCopy},
 };
 use log::debug;
-#[cfg(any(feature = "message-send", feature = "template-send"))]
 use mml::MmlCompilerBuilder;
 use process::SingleCmd;
 use std::{env, fs, sync::Arc};
@@ -82,7 +79,6 @@ pub async fn edit_tpl_with_editor<P: Printer>(
 
     loop {
         match choice::post_edit() {
-            #[cfg(feature = "message-send")]
             Ok(PostEditChoice::Send) => {
                 printer.print_log("Sending email…")?;
 
@@ -94,7 +90,7 @@ pub async fn edit_tpl_with_editor<P: Printer>(
 
                 let email = compiler.build(tpl.as_str())?.compile().await?.into_vec()?;
 
-                backend.send_message(&email).await?;
+                backend.send_message_then_save_copy(&email).await?;
 
                 remove_local_draft()?;
                 printer.print("Done!")?;
@@ -108,7 +104,6 @@ pub async fn edit_tpl_with_editor<P: Printer>(
                 printer.print("Email successfully saved locally")?;
                 break;
             }
-            #[cfg(feature = "message-add")]
             Ok(PostEditChoice::RemoteDraft) => {
                 #[allow(unused_mut)]
                 let mut compiler = MmlCompilerBuilder::new();

src/ui/prompt.rs

@@ -3,7 +3,6 @@ use std::io;
 
 use super::THEME;
 
-#[allow(unused)]
 pub(crate) fn passwd(prompt: &str) -> io::Result<String> {
     Password::with_theme(&*THEME)
         .with_prompt(prompt)
@@ -14,7 +13,6 @@ pub(crate) fn passwd(prompt: &str) -> io::Result<String> {
         .interact()
 }
 
-#[allow(unused)]
 pub(crate) fn secret(prompt: &str) -> io::Result<String> {
     Password::with_theme(&*THEME)
         .with_prompt(prompt)