From 9afc322314bdb8f1bc30053c9d2162773f5efeaa Mon Sep 17 00:00:00 2001
From: Wyatt Johnson <wyattjoh@gmail.com>
Date: Wed, 4 Jul 2018 10:50:10 -0600
Subject: [PATCH 1/2] feat: added support for --only flag

---
 scripts/watcher/bin/watcher.ts | 12 ++++++++++--
 scripts/watcher/types.ts       |  4 ++++
 scripts/watcher/watch.ts       | 17 +++++++++++++++--
 3 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/scripts/watcher/bin/watcher.ts b/scripts/watcher/bin/watcher.ts
index 32209c064..a3a50e6c3 100644
--- a/scripts/watcher/bin/watcher.ts
+++ b/scripts/watcher/bin/watcher.ts
@@ -4,16 +4,24 @@ import program from "commander";
 import path from "path";
 import watch from "../";
 
+function list(val: string) {
+  return val.split(",");
+}
+
 program
   .version("0.1.0")
   .usage("<configFile>")
+  .option("-o, --only <watcher>", "only run the specified watcher", list)
   .arguments("<configFile>")
   .description("Run watchers defined in <configFile>")
-  .action(configFile => {
+  .action((configFile, cmd) => {
+    const { only = [] } = cmd;
+
     let config: any = require(path.resolve(configFile));
     if (config.__esModule) {
       config = config.default;
     }
-    watch(config);
+
+    watch(config, { only });
   })
   .parse(process.argv);
diff --git a/scripts/watcher/types.ts b/scripts/watcher/types.ts
index f78daee24..15bd6090b 100644
--- a/scripts/watcher/types.ts
+++ b/scripts/watcher/types.ts
@@ -17,6 +17,10 @@ export interface Executor {
   execute(filePath: string): void;
 }
 
+export interface Options {
+  only?: string[];
+}
+
 export interface Config {
   rootDir?: string;
   backend?: Watcher;
diff --git a/scripts/watcher/watch.ts b/scripts/watcher/watch.ts
index 572f7107b..8a3feac75 100644
--- a/scripts/watcher/watch.ts
+++ b/scripts/watcher/watch.ts
@@ -2,7 +2,7 @@ import Joi from "joi";
 import path from "path";
 
 import ChokidarWatcher from "./ChokidarWatcher";
-import { Config, configSchema, WatchConfig, Watcher } from "./types";
+import { Config, configSchema, Options, WatchConfig, Watcher } from "./types";
 
 // Polyfill the asyncIterator symbol.
 if (Symbol.asyncIterator === undefined) {
@@ -43,9 +43,22 @@ function setupCleanup(config: Config) {
   );
 }
 
-export default async function watch(config: Config) {
+function filterOnly(config: Config, only: string[]) {
+  for (const key of Object.keys(config.watchers)) {
+    if (only.indexOf(key) === -1) {
+      // tslint:disable-next-line:no-console
+      console.log(`Disabled watcher "${key}"`);
+      delete config.watchers[key];
+    }
+  }
+}
+
+export default async function watch(config: Config, options?: Options) {
   Joi.assert(config, configSchema);
   const watcher = config.backend || new ChokidarWatcher();
+  if (options && options.only && options.only.length > 0) {
+    filterOnly(config, options.only);
+  }
   setupCleanup(config);
   for (const key of Object.keys(config.watchers)) {
     // tslint:disable-next-line:no-console

From 1a14c131051dde2572b95e63f57ebca1b8a23617 Mon Sep 17 00:00:00 2001
From: Kiwi <vinh@wikiwi.io>
Date: Wed, 4 Jul 2018 14:01:08 -0300
Subject: [PATCH 2/2] Use JSDocs comments (#1727)

---
 scripts/watcher/CommandExecutor.ts     | 6 +++---
 scripts/watcher/LongRunningExecutor.ts | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/scripts/watcher/CommandExecutor.ts b/scripts/watcher/CommandExecutor.ts
index 60cf15e6a..fddba0b8b 100644
--- a/scripts/watcher/CommandExecutor.ts
+++ b/scripts/watcher/CommandExecutor.ts
@@ -5,13 +5,13 @@ import { Executor } from "./types";
 
 interface CommandExecutorOptions {
   args?: ReadonlyArray<string>;
-  // If true, allow spawning multiple processes.
+  /** If true, allow spawning multiple processes. */
   spawnMutiple?: boolean;
 
-  // Specify the period in which the process is started at max once.
+  /** Specify the period in which the process is started at max once. */
   debounce?: number | false;
 
-  // If true, will run command upon initialization.
+  /** If true, will run command upon initialization. */
   runOnInit?: boolean;
 }
 
diff --git a/scripts/watcher/LongRunningExecutor.ts b/scripts/watcher/LongRunningExecutor.ts
index cffe6f7db..7019c1fb3 100644
--- a/scripts/watcher/LongRunningExecutor.ts
+++ b/scripts/watcher/LongRunningExecutor.ts
@@ -6,7 +6,7 @@ import { Executor } from "./types";
 interface LongRunningExecutorOptions {
   args?: ReadonlyArray<string>;
 
-  // Specify the period in which the process is restarted at max once.
+  /** Specify the period in which the process is restarted at max once. */
   debounce?: number;
 }