feat: improve file watcher with chokidar and better ignore patterns (#2621)

Co-authored-by: GitHub Action <action@github.com>

packages/opencode/src/file/ignore.ts

@@ -0,0 +1,61 @@
+export namespace FileIgnore {
+  const DEFAULT_PATTERNS = [
+    // Dependencies
+    "**/node_modules/**",
+    "**/bower_components/**",
+    "**/.pnpm-store/**",
+    "**/vendor/**",
+
+    // vcs
+    "**/.git/**",
+
+    // Build outputs
+    "**/dist/**",
+    "**/build/**",
+    "**/out/**",
+    "**/.next/**",
+    "**/target/**", // Rust
+    "**/bin/**",
+    "**/obj/**", // .NET
+
+    // Version control
+    "**/.git/**",
+    "**/.svn/**",
+    "**/.hg/**",
+
+    // IDE/Editor
+    "**/.vscode/**",
+    "**/.idea/**",
+    "**/*.swp",
+    "**/*.swo",
+
+    // OS
+    "**/.DS_Store",
+    "**/Thumbs.db",
+
+    // Logs & temp
+    "**/logs/**",
+    "**/tmp/**",
+    "**/temp/**",
+    "**/*.log",
+
+    // Coverage/test outputs
+    "**/coverage/**",
+    "**/.nyc_output/**",
+  ]
+
+  const GLOBS = DEFAULT_PATTERNS.map((p) => new Bun.Glob(p))
+
+  export function match(
+    filepath: string,
+    opts: {
+      extra?: Bun.Glob[]
+    },
+  ) {
+    const extra = opts.extra || []
+    for (const glob of [...GLOBS, ...extra]) {
+      if (glob.match(filepath)) return true
+    }
+    return false
+  }
+}

packages/opencode/src/file/watch.ts

@@ -1,46 +0,0 @@
-import z from "zod/v4"
-import { Bus } from "../bus"
-import fs from "fs"
-import { Log } from "../util/log"
-import { Flag } from "../flag/flag"
-import { Instance } from "../project/instance"
-
-export namespace FileWatcher {
-  const log = Log.create({ service: "file.watcher" })
-
-  export const Event = {
-    Updated: Bus.event(
-      "file.watcher.updated",
-      z.object({
-        file: z.string(),
-        event: z.union([z.literal("rename"), z.literal("change")]),
-      }),
-    ),
-  }
-  const state = Instance.state(
-    () => {
-      if (Instance.project.vcs !== "git") return {}
-      try {
-        const watcher = fs.watch(Instance.directory, { recursive: true }, (event, file) => {
-          log.info("change", { file, event })
-          if (!file) return
-          Bus.publish(Event.Updated, {
-            file,
-            event,
-          })
-        })
-        return { watcher }
-      } catch {
-        return {}
-      }
-    },
-    async (state) => {
-      state.watcher?.close()
-    },
-  )
-
-  export function init() {
-    if (Flag.OPENCODE_DISABLE_WATCHER || true) return
-    state()
-  }
-}

packages/opencode/src/file/watcher.ts

@@ -0,0 +1,61 @@
+import z from "zod/v4"
+import { Bus } from "../bus"
+import chokidar from "chokidar"
+import { Flag } from "../flag/flag"
+import { Instance } from "../project/instance"
+import { Log } from "../util/log"
+import { FileIgnore } from "./ignore"
+import { Config } from "../config/config"
+
+export namespace FileWatcher {
+  const log = Log.create({ service: "file.watcher" })
+
+  export const Event = {
+    Updated: Bus.event(
+      "file.watcher.updated",
+      z.object({
+        file: z.string(),
+        event: z.union([z.literal("add"), z.literal("change"), z.literal("unlink")]),
+      }),
+    ),
+  }
+
+  const state = Instance.state(
+    async () => {
+      if (Instance.project.vcs !== "git") return {}
+      log.info("init")
+      const cfg = await Config.get()
+      const ignore = (cfg.watcher?.ignore ?? []).map((v) => new Bun.Glob(v))
+      const watcher = chokidar.watch(Instance.directory, {
+        ignoreInitial: true,
+        awaitWriteFinish: true,
+        ignored: (filepath) => {
+          return FileIgnore.match(filepath, {
+            extra: ignore,
+          })
+        },
+      })
+      watcher.on("change", (file) => {
+        Bus.publish(Event.Updated, { file, event: "change" })
+      })
+      watcher.on("add", (file) => {
+        Bus.publish(Event.Updated, { file, event: "add" })
+      })
+      watcher.on("unlink", (file) => {
+        Bus.publish(Event.Updated, { file, event: "unlink" })
+      })
+      watcher.on("ready", () => {
+        log.info("ready")
+      })
+      return { watcher }
+    },
+    async (state) => {
+      state.watcher?.close()
+    },
+  )
+
+  export function init() {
+    if (!Flag.OPENCODE_EXPERIMENTAL_WATCHER) return
+    state()
+  }
+}