feat: hmr supports linked npm packages changes

crates/mako/src/dev.rs

@@ -16,7 +16,7 @@ use mako_core::{hyper, hyper_staticfile, hyper_tungstenite, tokio};
 
 use crate::compiler::{Compiler, Context};
 use crate::plugin::{PluginGenerateEndParams, PluginGenerateStats};
-use crate::watch::Watch;
+use crate::watch::Watcher;
 
 pub struct DevServer {
     root: PathBuf,
@@ -170,15 +170,15 @@ impl DevServer {
         let (tx, rx) = mpsc::channel();
         // let mut watcher = RecommendedWatcher::new(tx, notify::Config::default())?;
         let mut debouncer = new_debouncer(Duration::from_millis(10), None, tx).unwrap();
-        let watcher = debouncer.watcher();
-        Watch::watch(&root, watcher)?;
+        let mut watcher = Watcher::new(&root, debouncer.watcher(), &compiler);
+        watcher.watch()?;
 
         let initial_hash = compiler.full_hash();
         let mut last_cache_hash = Box::new(initial_hash);
         let mut hmr_hash = Box::new(initial_hash);
 
         for result in rx {
-            let paths = Watch::normalize_events(result.unwrap());
+            let paths = Watcher::normalize_events(result.unwrap());
             if !paths.is_empty() {
                 let compiler = compiler.clone();
                 let txws = txws.clone();
@@ -194,6 +194,7 @@ impl DevServer {
                     eprintln!("Error rebuilding: {:?}", e);
                 }
             }
+            watcher.refresh_watch()?;
         }
         Ok(())
     }

crates/mako/src/lib.rs

@@ -1,6 +1,7 @@
 #![feature(box_patterns)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(let_chains)]
+#![feature(result_option_inspect)]
 
 mod analyze_deps;
 mod ast;

crates/mako/src/main.rs

@@ -1,5 +1,6 @@
 #![feature(box_patterns)]
 #![feature(let_chains)]
+#![feature(result_option_inspect)]
 
 use std::sync::Arc;
 

crates/mako/src/watch.rs

@@ -1,43 +1,113 @@
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::path::{Path, PathBuf};
-use std::sync::mpsc::Sender;
+use std::sync::Arc;
 
-use mako_core::anyhow;
-use mako_core::notify::{self, EventKind, Watcher};
+use mako_core::anyhow::{self, Ok};
+use mako_core::notify::{self, EventKind, Watcher as NotifyWatcher};
 use mako_core::notify_debouncer_full::DebouncedEvent;
 
-pub struct Watch {
-    pub root: PathBuf,
-    pub delay: u64,
-    pub tx: Sender<Result<Vec<DebouncedEvent>, Vec<notify::Error>>>,
+use crate::compiler::Compiler;
+use crate::resolve::ResolverResource;
+
+pub struct Watcher<'a> {
+    pub watcher: &'a mut dyn NotifyWatcher,
+    pub root: &'a PathBuf,
+    pub compiler: &'a Compiler,
+    pub watched_files: HashSet<PathBuf>,
+    pub watched_dirs: HashSet<PathBuf>,
 }
 
-impl Watch {
+impl<'a> Watcher<'a> {
+    pub fn new(
+        root: &'a PathBuf,
+        watcher: &'a mut notify::RecommendedWatcher,
+        compiler: &'a Arc<Compiler>,
+    ) -> Self {
+        Self {
+            root,
+            watcher,
+            compiler,
+            watched_dirs: HashSet::new(),
+            watched_files: HashSet::new(),
+        }
+    }
+
     // pub fn watch(root: &PathBuf, watcher: &mut notify::RecommendedWatcher) -> anyhow::Result<()> {
-    pub fn watch(root: &PathBuf, watcher: &mut notify::RecommendedWatcher) -> anyhow::Result<()> {
-        let items = std::fs::read_dir(root)?;
+    pub fn watch(&mut self) -> anyhow::Result<()> {
+        self.watch_dir_recursive(
+            self.root.into(),
+            &[".git", "node_modules", ".DS_Store", "dist", ".node"],
+        )?;
+
+        let module_graph = self.compiler.context.module_graph.read().unwrap();
+        module_graph
+            .modules()
+            .iter()
+            .try_for_each(|module| -> anyhow::Result<()> {
+                if let Some(ResolverResource::Resolved(resource)) = module
+                    .info
+                    .as_ref()
+                    .and_then(|info| info.resolved_resource.as_ref())
+                {
+                    if let Some(dir) = &resource.0.description {
+                        let dir = dir.dir().as_ref();
+                        // not in root dir or is root's parent dir
+                        if dir.strip_prefix(self.root).is_err()
+                            && self.root.clone().strip_prefix(dir).is_err()
+                        {
+                            self.watch_dir_recursive(
+                                dir.into(),
+                                &[".git", "node_modules", ".DS_Store", ".node"],
+                            )?;
+                        }
+                    }
+                }
+
+                Ok(())
+            })?;
+
+        Ok(())
+    }
+
+    pub fn refresh_watch(&mut self) -> anyhow::Result<()> {
+        self.watch()?;
+        Ok(())
+    }
+
+    fn watch_dir_recursive(&mut self, path: PathBuf, ignore_list: &[&str]) -> anyhow::Result<()> {
+        let items = std::fs::read_dir(path)?;
         items
             .into_iter()
             .try_for_each(|item| -> anyhow::Result<()> {
                 let path = item.unwrap().path();
-                if Self::should_ignore_watch(&path) {
-                    return Ok(());
-                }
-                if path.is_file() {
-                    watcher.watch(path.as_path(), notify::RecursiveMode::NonRecursive)?;
-                } else if path.is_dir() {
-                    watcher.watch(path.as_path(), notify::RecursiveMode::Recursive)?;
-                } else {
-                    // others like symlink? should be ignore?
-                }
+                self.watch_file_or_dir(path, ignore_list)?;
                 Ok(())
             })?;
         Ok(())
     }
 
-    fn should_ignore_watch(path: &Path) -> bool {
+    fn watch_file_or_dir(&mut self, path: PathBuf, ignore_list: &[&str]) -> anyhow::Result<()> {
+        if Self::should_ignore_watch(&path, ignore_list) {
+            return Ok(());
+        }
+
+        if path.is_file() && !self.watched_files.contains(&path) {
+            self.watcher
+                .watch(path.as_path(), notify::RecursiveMode::NonRecursive)?;
+            self.watched_files.insert(path);
+        } else if path.is_dir() && !self.watched_dirs.contains(&path) {
+            self.watcher
+                .watch(path.as_path(), notify::RecursiveMode::Recursive)?;
+            self.watched_dirs.insert(path);
+        } else {
+            // others like symlink? should be ignore?
+        }
+
+        Ok(())
+    }
+
+    fn should_ignore_watch(path: &Path, ignore_list: &[&str]) -> bool {
         let path = path.to_string_lossy();
-        let ignore_list = [".git", "node_modules", ".DS_Store", "dist", ".node"];
         ignore_list.iter().any(|ignored| path.ends_with(ignored))
     }