fix working_dir in watch command

README.md

@@ -18,7 +18,7 @@ Where [PATH] is the path of the folder to initialize in [default: `.`]
 Options:
 - `--name <NAME>`                The name of the project
 - `--description <DESCRIPTION>`  The description of the project
-- `--pack-format <PACK_FORMAT>`  The pack format version
+- `--pack-format <FORMAT>`  The pack format version
 - `--force`                      Force initialization even if the directory is not empty
 
 ### Build a project
@@ -57,7 +57,8 @@ Where [PATH] is the path of the project folder to watch [default: `.`]
 
 Options:
 - `--no-initial`                     Do not run the command initially
-- `--debounce-time <DEBOUNCE_TIME>`  The time to wait in ms after the last change before running the command [default: `2000`]
+- `--debounce-time <TIME_IN_MS>`  The time to wait in ms after the last change before running the command [default: `2000`]
+- `--watch <PATH>`                  The directories to watch for changes [multi-arg, default: `src`, `pack.toml`, `pack.png`, assets directory]
 - `--execute <COMMAND>`              The commands (cli subcommands or shell commands) to execute in the project  when changes have been detected [multi-arg, default: `build`]
 
 ## Contributing

src/cli.rs

@@ -50,3 +50,15 @@ impl Command {
         Ok(())
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use clap::CommandFactory;
+
+    use super::*;
+
+    #[test]
+    fn verify_cli() {
+        Args::command().debug_assert();
+    }
+}

src/subcommands/init.rs

@@ -28,7 +28,7 @@ pub struct InitArgs {
     #[clap(short, long)]
     pub description: Option<String>,
     /// The pack format version.
-    #[clap(short, long)]
+    #[clap(short, long, value_name = "FORMAT")]
     pub pack_format: Option<u8>,
     /// Force initialization even if the directory is not empty.
     #[clap(short, long)]

src/subcommands/lang_debug.rs

@@ -9,7 +9,7 @@ pub struct LangDebugArgs {
     #[clap(default_value = ".")]
     pub path: PathBuf,
     /// The state to dump.
-    #[clap(short, long, default_value = "ast")]
+    #[clap(short, long, value_name = "STATE", default_value = "ast")]
     pub dump: DumpState,
     /// Pretty-print the output.
     #[clap(short, long)]

src/subcommands/watch.rs

@@ -24,10 +24,14 @@ pub struct WatchArgs {
     #[clap(short, long)]
     pub no_inital: bool,
     /// The time to wait in ms before running the command after changes are detected.
-    #[clap(short, long, default_value = "2000")]
+    #[clap(short, long, value_name = "TIME_IN_MS", default_value = "2000")]
     pub debounce_time: u64,
-    /// The commands to run in the project directory when changes are detected.
-    #[clap(short = 'x', long, default_value = "build .")]
+    /// Additional paths to watch for changes.
+    /// By default, the `src` directory, `pack.png`, and `pack.toml` as well as the defined assets directory in the config are watched.
+    #[clap(short, long, value_name = "PATH")]
+    pub watch: Vec<PathBuf>,
+    /// The commands to run in the project directory when changes are detected. Use multiple times to run multiple commands.
+    #[clap(short = 'x', long, value_name = "COMMAND", default_value = "build .")]
     pub execute: Vec<String>,
 }
 
@@ -58,7 +62,16 @@ pub fn watch(_verbose: bool, args: &WatchArgs) -> Result<()> {
         })
         .collect::<Vec<_>>();
 
-    if env::set_current_dir(args.path.as_path()).is_err() {
+    let current_dir = if args.no_inital {
+        print_info("Skipping initial commands because of cli flag.");
+        None
+    } else {
+        env::current_dir().ok()
+    };
+
+    if !args.no_inital
+        && (current_dir.is_none() || env::set_current_dir(args.path.as_path()).is_err())
+    {
         print_warning("Failed to change working directory to project path. Commands may not work.");
     }
 
@@ -85,6 +98,14 @@ pub fn watch(_verbose: bool, args: &WatchArgs) -> Result<()> {
     )
     .expect("Failed to initialize watcher");
 
+    if let Some(prev_cwd) = current_dir {
+        env::set_current_dir(prev_cwd).expect("Failed to change working directory back");
+    }
+
+    let assets_path = super::build::get_pack_config(&args.path)
+        .ok()
+        .and_then(|(conf, _)| conf.compiler.and_then(|c| c.assets));
+
     let watcher = debouncer.watcher();
     watcher
         .watch(args.path.join("src").as_path(), RecursiveMode::Recursive)
@@ -101,6 +122,32 @@ pub fn watch(_verbose: bool, args: &WatchArgs) -> Result<()> {
             RecursiveMode::NonRecursive,
         )
         .expect("Failed to watch project pack.toml");
+    if let Some(assets_path) = assets_path {
+        let full_assets_path = args.path.join(assets_path);
+        if full_assets_path.exists() {
+            watcher
+                .watch(full_assets_path.as_path(), RecursiveMode::Recursive)
+                .expect("Failed to watch project assets");
+        }
+    }
+
+    // custom watch paths
+    for path in args.watch.iter() {
+        if path.exists() {
+            watcher
+                .watch(path.as_path(), RecursiveMode::Recursive)
+                .expect("Failed to watch custom path");
+        } else {
+            print_warning(format!(
+                "Path {} does not exist. Skipping...",
+                path.display()
+            ));
+        }
+    }
+
+    if env::set_current_dir(args.path.as_path()).is_err() {
+        print_warning("Failed to change working directory to project path. Commands may not work.");
+    }
 
     loop {
         thread::sleep(Duration::from_secs(60));