refactor stdin for send and tpl cmds

Cargo.lock

@@ -305,6 +305,7 @@ dependencies = [
 name = "himalaya"
 version = "0.3.2"
 dependencies = [
+ "atty",
  "chrono",
  "clap",
  "env_logger",

Cargo.toml

@@ -6,6 +6,7 @@ authors = ["soywod <clement.douin@posteo.net>"]
 edition = "2018"
 
 [dependencies]
+atty = "0.2.14"
 chrono = "0.4.19"
 clap = {version = "2.33.3", default-features = false, features = ["suggestions", "color"]}
 env_logger = "0.8.3"

src/msg/cli.rs

@@ -1,3 +1,4 @@
+use atty::Stream;
 use clap;
 use error_chain::error_chain;
 use log::{debug, error, trace};
@@ -100,7 +101,7 @@ pub fn msg_subcmds<'a>() -> Vec<clap::App<'a, 'a>> {
             .arg(attachment_arg()),
         clap::SubCommand::with_name("send")
             .about("Sends a raw message")
-            .arg(clap::Arg::with_name("message").raw(true)),
+            .arg(clap::Arg::with_name("message").raw(true).last(true)),
         clap::SubCommand::with_name("save")
             .about("Saves a raw message")
             .arg(clap::Arg::with_name("message").raw(true)),
@@ -558,7 +559,7 @@ fn msg_matches_send(app: &App, matches: &clap::ArgMatches) -> Result<bool> {
 
     let mut imap_conn = ImapConnector::new(&app.account)?;
 
-    let msg = if matches.is_present("message") {
+    let msg = if atty::is(Stream::Stdin) {
         matches
             .value_of("message")
             .unwrap_or_default()

src/msg/tpl/cli.rs

@@ -1,7 +1,9 @@
+use atty::Stream;
 use clap;
 use error_chain::error_chain;
 use log::{debug, trace};
 use mailparse;
+use std::io::{self, BufRead};
 
 use crate::{app::App, imap::model::ImapConnector, msg::tpl::model::Tpl};
 
@@ -156,7 +158,17 @@ fn tpl_matches_new(app: &App, matches: &clap::ArgMatches) -> Result<bool> {
         tpl.header(key, val);
     }
 
-    if let Some(body) = matches.value_of("body") {
+    if atty::isnt(Stream::Stdin) {
+        let body = io::stdin()
+            .lock()
+            .lines()
+            .filter_map(|ln| ln.ok())
+            .map(|ln| ln.to_string())
+            .collect::<Vec<_>>()
+            .join("\n");
+        debug!("overriden body from stdin: {:?}", body);
+        tpl.body(body);
+    } else if let Some(body) = matches.value_of("body") {
         debug!("overriden body: {:?}", body);
         tpl.body(body);
     };