feat(cli): --filter flag

docs/cli/filter.md

@@ -0,0 +1,58 @@
+Use the `--filter` flag to execute lifecycle scripts in multiple packages at once:
+
+```bash
+bun --filter <pattern> <script>
+```
+
+Say you have a monorepo with two packages: `packages/api` and `packages/frontend`, both with a `dev` script that will start a local development server. Normally, you would have to open two separate terminal tabs, cd into each package directory, and run `bun dev`:
+
+```bash
+cd packages/api
+bun dev
+
+# in another terminal
+cd packages/frontend
+bun dev
+```
+
+Using `--filter`, you can run the `dev` script in both packages at once:
+
+```bash
+bun --filter '*' dev 
+```
+
+Both commands will be run in parallel, and you will see a nice terminal UI showing their respective outputs:
+![Terminal Output](https://github.com/oven-sh/bun/assets/48869301/2a103e42-9921-4c33-948f-a1ad6e6bac71)
+
+
+## Matching
+
+`--filter` accepts a pattern to match specific packages, either by name or by path. Patterns have full support for glob syntax.
+
+### Package Name `--filter <pattern>`
+
+Name patterns select packages based on the package name, as specified in `package.json`. For example, if you have packages `pkga`, `pkgb` and `other`, you can match all packages with `*`, only `pkga` and `pkgb` with `pkg*`, and a specific package by providing the full name of the package.
+
+### Package Path `--filter ./<glob>`
+
+Path patterns are specified by starting the pattern with `./`, and will select all packages in directories that match the pattern. For example, to match all packages in subdirectories of `packages`, you can use `--filter './packages/**'`. To match a package located in `pkgs/foo`, use `--filter ./pkgs/foo`.
+
+## Workspaces
+
+Filters respect your [workspace configuration](/docs/install/workspaces.md): If you have a `package.json` file that specifies which packages are part of the workspace,
+`--filter` will be restricted to only these packages. Also, in a workspace you can use `--filter` to run scripts in packages that are located anywhere in the workspace:
+
+```bash
+# Packages
+# src/foo
+# src/bar
+
+# in src/bar: runs myscript in src/foo, no need to cd!
+bun run --filter foo myscript
+```
+
+## Dependency Order
+Bun will respect package dependency order when running scripts. Say you have a package `foo` that depends on another package `bar` in your workspace, and both packages have a `build` script. When you run `bun --filter '*' build`, you will notice that `foo` will only start running once `bar` is done.
+
+### Cyclic Dependencies
+

docs/cli/run.md

@@ -151,6 +151,19 @@ By default, Bun respects this shebang and executes the script with `node`. Howev
 $ bun run --bun vite
 ```
 
+### Filtering
+
+in monorepos containing multiple packages, you can use the `--filter` argument to execute scripts in many packages at once.
+
+Use `bun run --filter <name_pattern> <script>` to execute `<script>` in all packages whose name matches `<name_pattern>`.
+For example, if you have subdirectories containing packages named `foo`, `bar` and `baz`, running 
+```bash
+bun run --filter 'ba*' <script>
+```
+will execute `<script>` in both `bar` and `baz`, but not in `foo`.
+
+Find more details in the docs page for [filter](/docs/cli/filter.md).
+
 ## `bun run -` to pipe code from stdin
 
 `bun run -` lets you read JavaScript, TypeScript, TSX, or JSX from stdin and execute it without writing to a temporary file first.

docs/install/workspaces.md

@@ -61,6 +61,7 @@ Workspaces have a couple major benefits.
 
 - **Code can be split into logical parts.** If one package relies on another, you can simply add it as a dependency in `package.json`. If package `b` depends on `a`, `bun install` will install your local `packages/a` directory into `node_modules` instead of downloading it from the npm registry.
 - **Dependencies can be de-duplicated.** If `a` and `b` share a common dependency, it will be _hoisted_ to the root `node_modules` directory. This reduces redundant disk usage and minimizes "dependency hell" issues associated with having multiple versions of a package installed simultaneously.
+- **Run scripts in multiple pacakges.** You can use the [`--filter` flag](/docs/cli/filter.md) to easily run `package.json` scripts in multiple packages in your workspace.
 
 {% callout %}
 ⚡️ **Speed** — Installs are fast, even for big monorepos. Bun installs the [Remix](https://github.com/remix-run/remix) monorepo in about `500ms` on Linux.

docs/nav.ts

@@ -180,6 +180,9 @@ export default {
  page("install/lifecycle", "Lifecycle scripts", {
  description: "How Bun handles package lifecycle scripts with trustedDependencies",
  }),
+ page("cli/filter", "Filter", {
+ description: "Run scripts in multiple packages in parallel",
+ }),
  page("install/lockfile", "Lockfile", {
  description:
  "Bun's binary lockfile `bun.lockb` tracks your resolved dependency tree, making future installs fast and repeatable.",

src/bun.js/api/bun/process.zig

@@ -81,6 +81,7 @@ pub const Rusage = if (Environment.isWindows) win_rusage else std.os.rusage;
 const Subprocess = JSC.Subprocess;
 const LifecycleScriptSubprocess = bun.install.LifecycleScriptSubprocess;
 const ShellSubprocess = bun.shell.ShellSubprocess;
+const ProcessHandle = @import("../../../cli/filter_run.zig").ProcessHandle;
 // const ShellSubprocessMini = bun.shell.ShellSubprocessMini;
 pub const ProcessExitHandler = struct {
  ptr: TaggedPointer = TaggedPointer.Null,
@@ -93,6 +94,7 @@ pub const ProcessExitHandler = struct {
  Subprocess,
  LifecycleScriptSubprocess,
  ShellSubprocess,
+ ProcessHandle,
 
  SyncProcess,
  },
@@ -116,6 +118,10 @@ pub const ProcessExitHandler = struct {
  const subprocess = this.ptr.as(LifecycleScriptSubprocess);
  subprocess.onProcessExit(process, status, rusage);
  },
+ .ProcessHandle => {
+ const subprocess = this.ptr.as(ProcessHandle);
+ subprocess.onProcessExit(process, status, rusage);
+ },
  @field(TaggedPointer.Tag, bun.meta.typeBaseName(@typeName(ShellSubprocess))) => {
  const subprocess = this.ptr.as(ShellSubprocess);
  subprocess.onProcessExit(process, status, rusage);

src/cli.zig

@@ -34,6 +34,7 @@ const bundler = bun.bundler;
 const DotEnv = @import("./env_loader.zig");
 const RunCommand_ = @import("./cli/run_command.zig").RunCommand;
 const CreateCommand_ = @import("./cli/create_command.zig").CreateCommand;
+const FilterRun = @import("./cli/filter_run.zig");
 
 const fs = @import("fs.zig");
 const Router = @import("./router.zig");
@@ -186,6 +187,7 @@ pub const Arguments = struct {
  };
 
  const auto_or_run_params = [_]ParamType{
+ clap.parseParam("--filter <STR>... Run a script in all workspace packages matching the pattern") catch unreachable,
  clap.parseParam("-b, --bun Force a script or package to use Bun's runtime instead of Node.js (via symlinking node)") catch unreachable,
  clap.parseParam("--shell <STR> Control the shell used for package.json scripts. Supports either 'bun' or 'system'") catch unreachable,
  };
@@ -432,6 +434,10 @@ pub const Arguments = struct {
  cwd = try bun.getcwdAlloc(allocator);
  }
 
+ if (cmd == .RunCommand or cmd == .AutoCommand) {
+ ctx.filters = args.options("--filter");
+ }
+
  if (cmd == .TestCommand) {
  if (args.option("--timeout")) |timeout_ms| {
  if (timeout_ms.len > 0) {
@@ -1154,6 +1160,8 @@ pub const Command = struct {
  bundler_options: BundlerOptions = BundlerOptions{},
  runtime_options: RuntimeOptions = RuntimeOptions{},
 
+ filters: []const []const u8 = &[_][]const u8{},
+
  preloads: []const string = &[_]string{},
  has_loaded_global_config: bool = false,
 
@@ -1703,6 +1711,13 @@ pub const Command = struct {
  if (comptime bun.fast_debug_build_mode and bun.fast_debug_build_cmd != .RunCommand) unreachable;
  const ctx = try Command.Context.create(allocator, log, .RunCommand);
 
+ if (ctx.filters.len > 0) {
+ FilterRun.runScriptsWithFilter(ctx) catch |err| {
+ Output.prettyErrorln("<r><red>error<r>: {s}", .{@errorName(err)});
+ Global.exit(1);
+ };
+ }
+
  if (ctx.positionals.len > 0) {
  if (try RunCommand.exec(ctx, false, true, false)) {
  return;
@@ -1725,6 +1740,7 @@ pub const Command = struct {
  },
  .AutoCommand => {
  if (comptime bun.fast_debug_build_mode and bun.fast_debug_build_cmd != .AutoCommand) unreachable;
+
  var ctx = Command.Context.create(allocator, log, .AutoCommand) catch |e| {
  switch (e) {
  error.MissingEntryPoint => {
@@ -1737,6 +1753,13 @@ pub const Command = struct {
  }
  };
 
+ if (ctx.filters.len > 0) {
+ FilterRun.runScriptsWithFilter(ctx) catch |err| {
+ Output.prettyErrorln("<r><red>error<r>: {s}", .{@errorName(err)});
+ Global.exit(1);
+ };
+ }
+
  if (ctx.runtime_options.eval.script.len > 0) {
  const trigger = bun.pathLiteral("/[eval]");
  var entry_point_buf: [bun.MAX_PATH_BYTES + trigger.len]u8 = undefined;
@@ -1821,6 +1844,9 @@ pub const Command = struct {
  }
 
  if (ctx.positionals.len > 0 and extension.len == 0) {
+ if (ctx.filters.len > 0) {
+ Output.prettyln("<r><yellow>warn<r>: Filters are ignored for auto command", .{});
+ }
  if (try RunCommand.exec(ctx, true, false, true)) {
  return;
  }