Add --nvim-bin-path command line option

README.md

@@ -9,3 +9,10 @@ To setup font add next line to *ginit.vim*
 ```vim
 call rpcnotify(1, 'Gui', 'Font', 'DejaVu Sans Mono 12')
 ```
+
+# Command line
+As this project uses gtk-rs, custom option by GtkApplication not supported yet.
+There is workaround to pass nvim execution path.
+```bat
+cargo run -- --nvim-bin-path=E:\Neovim\bin\nvim.exe
+```

src/main.rs

@@ -18,13 +18,15 @@ use std::thread;
 use std::env;
 use gio::ApplicationExt;
 
+const BIN_PATH_ARG: &'static str = "--nvim-bin-path";
+
 fn main() {
     let app = gtk::Application::new(Some("org.gtk.neovim-gtk"), gio::ApplicationFlags::empty()).expect("Failed to initialize GTK application");
 
     app.connect_activate(activate);
 
     let args: Vec<String> = env::args().collect();
-    let argv: Vec<&str> = args.iter().map(String::as_str).collect();
+    let argv: Vec<&str> = args.iter().filter(|a| !a.starts_with(BIN_PATH_ARG)).map(String::as_str).collect();
     app.run(argv.len() as i32, &argv);
 }
 
@@ -33,12 +35,21 @@ fn activate(app: &gtk::Application) {
         let mut ui = ui_cell.borrow_mut();
         ui.init(app);
 
-        nvim::initialize(&mut *ui).expect("Can't start nvim instance");
+        let path = nvim_bin_path();
+        nvim::initialize(&mut *ui, path.as_ref()).expect("Can't start nvim instance");
 
         guard_dispatch_thread(&mut *ui);
     });
 }
 
+fn nvim_bin_path() -> Option<String> {
+    std::env::args()
+        .skip_while(|a| !a.starts_with(BIN_PATH_ARG))
+        .map(|p| p.split('=').nth(1).map(str::to_owned))
+        .nth(0)
+        .unwrap_or(None)
+}
+
 fn guard_dispatch_thread(ui: &mut ui::Ui) {
     let guard = ui.nvim().session.take_dispatch_guard();
     thread::spawn(move || {

src/nvim.rs

@@ -63,13 +63,14 @@ macro_rules! try_uint {
     })
 }
 
-pub fn initialize(ui: &mut Ui) -> Result<()> {
-    // let mut session = try!(Session::new_tcp("127.0.0.1:6666"));
-    let session = if cfg!(target_os = "windows") {
-        Session::new_child_path("E:\\Neovim\\bin\\nvim.exe").unwrap()
+pub fn initialize(ui: &mut Ui, nvim_bin_path: Option<&String>) -> Result<()> {
+    let session = if let Some(path) = nvim_bin_path {
+        println!("{}", path);
+        Session::new_child_path(path)?
     } else {
-        Session::new_child().unwrap()
+        Session::new_child()?
     };
+
     let nvim = Neovim::new(session);
     ui.set_nvim(nvim);
     ui.model = UiModel::new(24, 80);