Update: Add silent option

.gitignore

@@ -6,3 +6,4 @@
 /npm-debug.log
 /test-workspace/npm-debug.log
 /test-workspace/test.txt
+/test.js

README.md

@@ -38,6 +38,7 @@ Usage: npm-run-all [OPTIONS] [...tasks]
     -p, --parallel [...tasks]   Run a group of tasks in parallel.
     -s, --sequential [...tasks] Run a group of tasks sequentially.
     -v, --version               Print version number.
+    --silent                    Set "silent" to the log level of npm.
 ```
 
 ### Run tasks sequentially
@@ -89,7 +90,7 @@ npm-run-all --parallel "build:* -- --watch"
 We can enclose a script name or a pattern in quotes to use arguments.
 When you use a pattern, arguments are forwarded to every matched task.
 
-An example: https://gist.github.com/mysticatea/34949629c9e0a01a9e7d
+An example: https://gist.github.com/mysticatea/34949629c9e0a01a9e7d<br>
 See also: https://docs.npmjs.com/cli/run-script
 
 ### Glob-like pattern matching for task names
@@ -152,6 +153,9 @@ Run npm-scripts.
     Every value is a map-like object (Pairs of variable name and value).
     e.g. `{"npm-run-all": {"test": 777, "test2": 333}}`
     Default is `null`.
+  - **options.silent** `boolean` --
+    The flag to set `silent` to the log level of npm.
+    Default is `false`.
 
 `runAll` returns a promise that becomes *fulfilled* when all tasks are completed.
 The promise will become *rejected* when any of the tasks exit with a non-zero code.

src/bin/help.js

@@ -22,6 +22,7 @@ Usage: npm-run-all [OPTIONS] [...tasks]
     -p, --parallel [...tasks]   Run a group of tasks in parallel.
     -s, --sequential [...tasks] Run a group of tasks in sequencial.
     -v, --version               Print version number.
+    --silent                    Set "silent" to the log level of npm.
 
   See Also:
     https://github.com/mysticatea/npm-run-all#readme

src/bin/main.js

@@ -73,6 +73,10 @@ function parse(args) {
                 queue.push({parallel: true, patterns: [], packageConfig});
                 break;
 
+            case "--silent":
+                // do nothing.
+                break;
+
             default: {
                 const matched = OVERWRITE_OPTION.exec(arg);
                 if (matched) {
@@ -108,19 +112,29 @@ function parse(args) {
  */
 export default function npmRunAll(args, stdout, stderr) {
     try {
+        const stdin = process.stdin;
+        const silent = (
+            args.indexOf("--silent") !== -1 ||
+            process.env.npm_config_loglevel === "silent"
+        );
+
         return parse(args).reduce(
-            (prev, group) => (group.patterns.length === 0) ?
-                prev :
-                prev.then(() => runAll(
-                    group.patterns,
+            (prev, {patterns, parallel, packageConfig}) => {
+                if (patterns.length === 0) {
+                    return prev;
+                }
+                return prev.then(() => runAll(
+                    patterns,
                     {
                         stdout,
                         stderr,
-                        stdin: process.stdin,
-                        parallel: group.parallel,
-                        packageConfig: group.packageConfig
+                        stdin,
+                        parallel,
+                        packageConfig,
+                        silent
                     }
-                )),
+                ));
+            },
             START_PROMISE
         );
     }

src/lib/npm-run-all.js

@@ -32,9 +32,6 @@ function toArray(x) {
  */
 function toOverwriteOptions(config) {
     const options = [];
-    if (config == null) {
-        return options;
-    }
 
     for (const packageName of Object.keys(config)) {
         const packageConfig = config[packageName];
@@ -87,6 +84,9 @@ function toOverwriteOptions(config) {
  *   Every value is a map-like object (Pairs of variable name and value).
  *   e.g. `{"npm-run-all": {"test": 777}}`
  *   Default is `null`.
+ * @param {boolean} options.silent -
+ *   The flag to set `silent` to the log level of npm.
+ *   Default is `false`.
  * @returns {Promise}
  *   A promise object which becomes fullfilled when all npm-scripts are completed.
  */
@@ -98,7 +98,8 @@ export default function npmRunAll(
         stdout = null,
         stderr = null,
         taskList = null,
-        packageConfig = null
+        packageConfig = null,
+        silent = false
     } = {}
 ) {
     try {
@@ -115,10 +116,16 @@ export default function npmRunAll(
             throw new Error(`Matched tasks not found: ${patterns.join(", ")}`);
         }
 
-        return (
-            parallel ? runTasksInParallel(tasks, stdin, stdout, stderr, toOverwriteOptions(packageConfig)) :
-            /* else */ runTasksInSequencial(tasks, stdin, stdout, stderr, toOverwriteOptions(packageConfig))
-        );
+        const prefixOptions = [];
+        if (silent) {
+            prefixOptions.push("--silent");
+        }
+        if (packageConfig != null) {
+            prefixOptions.push(...toOverwriteOptions(packageConfig));
+        }
+
+        const runTasks = parallel ? runTasksInParallel : runTasksInSequencial;
+        return runTasks(tasks, stdin, stdout, stderr, prefixOptions);
     }
     catch (err) {
         return Promise.reject(new Error(err.message));

src/lib/run-task.js

@@ -43,14 +43,14 @@ function detectStreamKind(stream, std) {
  *   If this is `null`, cannot send.
  *   If this is `process.stderr`, inherits it.
  *   Otherwise, makes a pipe.
- * @param {string[]} packageConfigOptions -
- *   `--:=` style options to overwrite package configs.
+ * @param {string[]} prefixOptions -
+ *   An array of options which are inserted before the task name.
  * @returns {Promise}
  *   A promise object which becomes fullfilled when the npm-script is completed.
  *   This promise object has an extra method: `abort()`.
  * @private
  */
-export default function runTask(task, stdin, stdout, stderr, packageConfigOptions) {
+export default function runTask(task, stdin, stdout, stderr, prefixOptions) {
     let cp = null;
     const promise = whichNpm().then(npmPath => new Promise((resolve, reject) => {
         const stdinKind = detectStreamKind(stdin, process.stdin);
@@ -60,7 +60,7 @@ export default function runTask(task, stdin, stdout, stderr, packageConfigOption
         // Execute.
         cp = spawn(
             npmPath,
-            ["run-script"].concat(packageConfigOptions, parseArgs(task)),
+            ["run-script"].concat(prefixOptions, parseArgs(task)),
             {stdio: [stdinKind, stdoutKind, stderrKind]}
         );
 

src/lib/run-tasks-in-parallel.js

@@ -26,17 +26,17 @@ import runTask from "./run-task";
  *   If this is `null`, cannot send.
  *   If this is `process.stderr`, inherits it.
  *   Otherwise, makes a pipe.
- * @param {string[]} packageConfigOptions -
- *   `--:=` style options to overwrite package configs.
+ * @param {string[]} prefixOptions -
+ *   An array of options which are inserted before the task name.
  * @returns {Promise}
  *   A promise object which becomes fullfilled when all npm-scripts are completed.
  * @private
  */
-export default function runTasksInParallel(tasks, stdin, stdout, stderr, packageConfigOptions) {
+export default function runTasksInParallel(tasks, stdin, stdout, stderr, prefixOptions) {
     // When one of tasks exited with non-zero, abort all tasks.
     // And wait for all tasks exit.
     let nonZeroExited = null;
-    const taskPromises = tasks.map(task => runTask(task, stdin, stdout, stderr, packageConfigOptions));
+    const taskPromises = tasks.map(task => runTask(task, stdin, stdout, stderr, prefixOptions));
     const parallelPromise = Promise.all(taskPromises.map(p =>
         p.then(item => {
             if (nonZeroExited == null && item.code) {

src/lib/run-tasks-in-sequencial.js

@@ -40,17 +40,17 @@ function rejectIfNonZeroExit(result) {
  *   If this is `null`, cannot send.
  *   If this is `process.stderr`, inherits it.
  *   Otherwise, makes a pipe.
- * @param {string[]} packageConfigOptions -
- *   `--:=` style options to overwrite package configs.
+ * @param {string[]} prefixOptions -
+ *   An array of options which are inserted before the task name.
  * @returns {Promise}
  *   A promise object which becomes fullfilled when all npm-scripts are completed.
  * @private
  */
-export default function runTasksInSequencial(tasks, stdin, stdout, stderr, packageConfigOptions) {
+export default function runTasksInSequencial(tasks, stdin, stdout, stderr, prefixOptions) {
     return tasks.reduce(
         (prev, task) => prev.then(result => {
             rejectIfNonZeroExit(result);
-            return runTask(task, stdin, stdout, stderr, packageConfigOptions);
+            return runTask(task, stdin, stdout, stderr, prefixOptions);
         }),
         START_PROMISE
     ).then(rejectIfNonZeroExit);

test/common.js

@@ -104,4 +104,26 @@ describe("[common] npm-run-all", () => {
             it("command version", () => command(["test-task:issue14:posix"]));
         });
     }
+
+    describe("should not print log if silent option was given:", () => {
+        it("lib version", () => {
+            const stdout = new BufferStream();
+            const stderr = new BufferStream();
+            return runAll("test-task:error", {silent: true, stdout, stderr})
+                .then(
+                    () => assert(false, "Should fail."),
+                    () => assert(stdout.value === "" && stderr.value === "")
+                );
+        });
+
+        it("command version", () => {
+            const stdout = new BufferStream();
+            const stderr = new BufferStream();
+            return command(["--silent", "test-task:error"], stdout, stderr)
+                .then(
+                    () => assert(false, "Should fail."),
+                    () => assert(stdout.value === "" && stderr.value === "")
+                );
+        });
+    });
 });