add meson build system

.gitignore

@@ -0,0 +1,2 @@
+/build
+/yggtk

README.md

@@ -5,9 +5,8 @@ Now support Arch and Debian based Linux (OpenRC and SystemD).
 ### Build and run
 
 ```
-git clone https://git.macaw.me/plant_1312/Yggtk.git
-valac Yggtk/main.vala --pkg gtk+-3.0 --pkg json-glib-1.0
-cp Yggtk/main.ui .
-rm -R Yggtk
-./main
+git clone https://git.macaw.me/plant_1312/Yggtk.git && cd Yggtk
+meson build
+ninja -C build
+./build/yggtk
 ```

main.vala

@@ -110,16 +110,31 @@ int download () {
 
 }
 
+string mktempdir () throws Error {
+    string temp_dir = null;
+    Process.spawn_command_line_sync("mktemp -d", out temp_dir);
+    return temp_dir.strip ();
+}
+
 int update () {
 
 	try {
 
-		Process.spawn_command_line_sync ("git clone https://git.macaw.me/plant_1312/Yggtk.git");
-		Process.spawn_command_line_sync ("valac Yggtk/main.vala --pkg gtk+-3.0 --pkg json-glib-1.0");
-		Process.spawn_command_line_sync ("cp Yggtk/main.ui .");
-		Process.spawn_command_line_sync ("rm -R Yggtk");
+        unowned string repo_url = Environment.get_variable ("YGG_UPDATE_REPO");
+        string temp_dir = mktempdir ();
+        string command = null;
+
+        if (repo_url == null) {
+            repo_url = "https://git.macaw.me/plant_1312/Yggtk.git";
+        }
+
+        Process.spawn_command_line_sync (@"git clone $repo_url $temp_dir");
+        Process.spawn_command_line_sync (@"meson $temp_dir/build $temp_dir");
+        Process.spawn_command_line_sync (@"ninja -C $temp_dir/build");
+        Process.spawn_command_line_sync (@"cp $temp_dir/build/yggtk .");
+        Process.spawn_command_line_sync (@"rm -rf $temp_dir");
+        Process.spawn_command_line_sync ("./yggtk");
 
-		Process.spawn_command_line_async ("./main");
 		Gtk.main_quit ();
 
 	} catch (Error e) {

meson.build

@@ -0,0 +1,18 @@
+project(
+  'yggtk',
+  ['vala', 'c'],
+  license: 'GPL3',
+)
+
+pkg = import('pkgconfig')
+
+yggtk = executable(
+  meson.project_name(),
+  [
+    'main.vala',
+  ],
+  dependencies: [
+    dependency('gtk+-3.0'),
+    dependency('json-glib-1.0'),
+  ]
+)