HackStudio: Allow customizing the actions of the Build & Run buttons

This commit introduces per-project settings that can be customized
through a JSON file placed in '.hackstudio/config.json' in the
project's root

Userland/DevTools/HackStudio/CMakeLists.txt

@@ -44,6 +44,7 @@ set(SOURCES
     Locator.cpp
     Project.cpp
     ProjectBuilder.cpp
+    ProjectConfig.cpp
     ProjectDeclarations.cpp
     ProjectFile.cpp
     ProjectTemplate.cpp

Userland/DevTools/HackStudio/Project.cpp

@@ -66,4 +66,13 @@ bool Project::project_is_serenity() const
     return m_root_path.ends_with("Source/serenity");
 }
 
+NonnullOwnPtr<ProjectConfig> Project::config() const
+{
+    auto config_or_error = ProjectConfig::try_load_project_config(LexicalPath::absolute_path(m_root_path, config_file_path));
+    if (config_or_error.is_error())
+        return ProjectConfig::create_empty();
+
+    return config_or_error.release_value();
+}
+
 }

Userland/DevTools/HackStudio/Project.h

@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include "ProjectConfig.h"
 #include "ProjectFile.h"
 #include <AK/LexicalPath.h>
 #include <AK/Noncopyable.h>
@@ -32,6 +33,9 @@ public:
     String to_absolute_path(String const&) const;
     bool project_is_serenity() const;
 
+    static constexpr StringView config_file_path = ".hackstudio/config.json";
+    NonnullOwnPtr<ProjectConfig> config() const;
+
 private:
     explicit Project(String const& root_path);
 

Userland/DevTools/HackStudio/ProjectBuilder.cpp

@@ -16,6 +16,7 @@ namespace HackStudio {
 
 ProjectBuilder::ProjectBuilder(NonnullRefPtr<TerminalWrapper> terminal, Project const& project)
     : m_project_root(project.root_path())
+    , m_project(project)
     , m_terminal(move(terminal))
     , m_is_serenity(project.project_is_serenity() ? IsSerenityRepo::Yes : IsSerenityRepo::No)
 {
@@ -24,6 +25,12 @@ ProjectBuilder::ProjectBuilder(NonnullRefPtr<TerminalWrapper> terminal, Project
 ErrorOr<void> ProjectBuilder::build(StringView active_file)
 {
     m_terminal->clear_including_history();
+
+    if (auto command = m_project.config()->build_command(); command.has_value()) {
+        TRY(m_terminal->run_command(command.value()));
+        return {};
+    }
+
     if (active_file.is_null())
         return Error::from_string_literal("no active file"sv);
 
@@ -44,6 +51,11 @@ ErrorOr<void> ProjectBuilder::build(StringView active_file)
 
 ErrorOr<void> ProjectBuilder::run(StringView active_file)
 {
+    if (auto command = m_project.config()->run_command(); command.has_value()) {
+        TRY(m_terminal->run_command(command.value()));
+        return {};
+    }
+
     if (active_file.is_null())
         return Error::from_string_literal("no active file"sv);
 

Userland/DevTools/HackStudio/ProjectBuilder.h

@@ -49,6 +49,7 @@ private:
     static ErrorOr<void> verify_cmake_is_installed();
 
     String m_project_root;
+    Project const& m_project;
     NonnullRefPtr<TerminalWrapper> m_terminal;
     IsSerenityRepo m_is_serenity { IsSerenityRepo::No };
     String m_serenity_component_cmake_file;

Userland/DevTools/HackStudio/ProjectConfig.cpp

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "ProjectConfig.h"
+#include <AK/NonnullOwnPtr.h>
+#include <LibCore/File.h>
+
+namespace HackStudio {
+
+ProjectConfig::ProjectConfig(JsonObject config)
+    : m_config(move(config))
+{
+}
+
+ErrorOr<NonnullOwnPtr<ProjectConfig>> ProjectConfig::try_load_project_config(String path)
+{
+    auto file = TRY(Core::File::open(path, Core::OpenMode::ReadOnly));
+    auto file_contents = file->read_all();
+    file->close();
+
+    auto json = TRY(JsonValue::from_string(StringView { file_contents }));
+    if (!json.is_object())
+        return Error::from_string_literal("The topmost JSON element is not an object");
+
+    return adopt_own(*new ProjectConfig(json.as_object()));
+}
+
+NonnullOwnPtr<ProjectConfig> ProjectConfig::create_empty()
+{
+    JsonObject empty {};
+    return adopt_own(*new ProjectConfig(empty));
+}
+
+Optional<String> ProjectConfig::read_key(String key_name) const
+{
+    auto const& value = m_config.get(key_name);
+    if (!value.is_string())
+        return {};
+
+    return { value.as_string() };
+}
+
+}

Userland/DevTools/HackStudio/ProjectConfig.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Error.h>
+#include <AK/JsonObject.h>
+#include <AK/Optional.h>
+#include <AK/OwnPtr.h>
+#include <LibCore/Object.h>
+
+namespace HackStudio {
+
+class ProjectConfig {
+public:
+    static ErrorOr<NonnullOwnPtr<ProjectConfig>> try_load_project_config(String path);
+    static NonnullOwnPtr<ProjectConfig> create_empty();
+
+    ProjectConfig(JsonObject);
+
+    Optional<String> build_command() const { return read_key("build_command"); }
+    Optional<String> run_command() const { return read_key("run_command"); }
+
+private:
+    Optional<String> read_key(String key_name) const;
+
+    JsonObject m_config;
+};
+
+}