feat(cli): add plugin (#304)

plugins/cli/src/lib.rs

@@ -0,0 +1,46 @@
+use tauri::{
+    plugin::{Builder, PluginApi, TauriPlugin},
+    AppHandle, Manager, Runtime, State,
+};
+
+mod config;
+mod error;
+mod parser;
+
+use config::{Arg, Config};
+use error::Error;
+type Result<T> = std::result::Result<T, Error>;
+
+// TODO: use PluginApi#app when 2.0.0-alpha.9 is released
+pub struct Cli<R: Runtime>(PluginApi<R, Config>, AppHandle<R>);
+
+impl<R: Runtime> Cli<R> {
+    pub fn matches(&self) -> Result<parser::Matches> {
+        parser::get_matches(self.0.config(), self.1.package_info())
+    }
+}
+
+pub trait CliExt<R: Runtime> {
+    fn cli(&self) -> &Cli<R>;
+}
+
+impl<R: Runtime, T: Manager<R>> CliExt<R> for T {
+    fn cli(&self) -> &Cli<R> {
+        self.state::<Cli<R>>().inner()
+    }
+}
+
+#[tauri::command]
+fn cli_matches<R: Runtime>(_app: AppHandle<R>, cli: State<'_, Cli<R>>) -> Result<parser::Matches> {
+    cli.matches()
+}
+
+pub fn init<R: Runtime>() -> TauriPlugin<R, Config> {
+    Builder::new("cli")
+        .invoke_handler(tauri::generate_handler![cli_matches])
+        .setup(|app, api| {
+            app.manage(Cli(api, app.clone()));
+            Ok(())
+        })
+        .build()
+}