Fix: fix for latest yarn

lib/run-task.js

@@ -135,29 +135,25 @@ module.exports = function runTask(task, options) {
             ))
         }
 
-        if (path.extname(options.npmPath || "a.js") === ".js") {
-            const npmPath = options.npmPath || process.env.npm_execpath  //eslint-disable-line no-process-env
-            const execPath = npmPath ? process.execPath : "npm"
-            const spawnArgs = [].concat(
-                npmPath ? [npmPath, "run"] : ["run"],
-                options.prefixOptions,
-                parseArgs(task)
-            )
-
-            // Execute.
-            cp = spawn(execPath, spawnArgs, spawnOptions)
+        // Execute.
+        const npmPath = options.npmPath || process.env.npm_execpath //eslint-disable-line no-process-env
+        const npmPathIsJs = typeof npmPath === "string" && /\.m?js/.test(path.extname(npmPath))
+        const execPath = (npmPathIsJs ? process.execPath : npmPath || "npm")
+        const isYarn = path.basename(npmPath || "npm").startsWith("yarn")
+        const spawnArgs = ["run"]
+
+        if (npmPathIsJs) {
+            spawnArgs.unshift(npmPath)
         }
-        else {
-            const execPath = options.npmPath
-            const spawnArgs = [].concat(
-                ["run"],
-                options.prefixOptions,
-                parseArgs(task)
-            )
-
-            // Execute.
-            cp = spawn(execPath, spawnArgs, spawnOptions)
+        if (!isYarn) {
+            Array.prototype.push.apply(spawnArgs, options.prefixOptions)
         }
+        else if (options.prefixOptions.indexOf("--silent") !== -1) {
+            spawnArgs.push("--silent")
+        }
+        Array.prototype.push.apply(spawnArgs, parseArgs(task))
+
+        cp = spawn(execPath, spawnArgs, spawnOptions)
 
         // Piping stdio.
         if (stdinKind === "pipe") {

package.json

@@ -51,7 +51,8 @@
     "mocha": "^3.5.0",
     "nyc": "^11.1.0",
     "power-assert": "^1.4.4",
-    "rimraf": "^2.6.1"
+    "rimraf": "^2.6.1",
+    "yarn": "^1.2.1"
   },
   "repository": "mysticatea/npm-run-all",
   "keywords": [

test-workspace/package.json

@@ -37,7 +37,8 @@
     "test-task:nest-append:npm-run-all": "node ../bin/npm-run-all/index.js test-task:append",
     "test-task:nest-append:run-s": "node ../bin/run-s/index.js test-task:append",
     "test-task:nest-append:run-p": "node ../bin/run-p/index.js test-task:append",
-    "test-task:delayed": "node tasks/output-with-delay.js"
+    "test-task:delayed": "node tasks/output-with-delay.js",
+    "test-task:yarn": "node ../bin/npm-run-all/index.js test-task:append:{a,b}"
   },
   "repository": {
     "type": "git",

test/yarn.js

@@ -0,0 +1,66 @@
+/**
+ * @author Toru Nagashima
+ * @copyright 2016 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const spawn = require("cross-spawn")
+const assert = require("power-assert")
+const BufferStream = require("./lib/buffer-stream")
+const util = require("./lib/util")
+const result = util.result
+const removeResult = util.removeResult
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Execute a command.
+ * @param {string} command A command to execute.
+ * @param {string[]} args Arguments for the command.
+ * @returns {Promise<string>} The result of child process's stdout.
+ */
+function exec(command, args) {
+    return new Promise((resolve, reject) => {
+        const stdout = new BufferStream()
+        const stderr = new BufferStream()
+        const cp = spawn(command, args, { stdio: ["inherit", "pipe", "pipe"] })
+
+        cp.stdout.pipe(stdout)
+        cp.stderr.pipe(stderr)
+        cp.on("exit", (exitCode) => {
+            if (exitCode) {
+                reject(new Error(`Exited with ${exitCode}: ${stderr.value}`))
+                return
+            }
+            resolve(stdout.value)
+        })
+        cp.on("error", reject)
+    })
+}
+
+//------------------------------------------------------------------------------
+// Test
+//------------------------------------------------------------------------------
+
+describe("[yarn]", () => {
+    before(() => process.chdir("test-workspace"))
+    after(() => process.chdir(".."))
+
+    beforeEach(removeResult)
+
+    describe("'yarn run' command", () => {
+        it("should run 'npm-run-all' in scripts with yarn.", async () => {
+            const stdout = await exec("yarn", ["run", "test-task:yarn"])
+            const matches = stdout.match(/^\$ node .+$/gm)
+            assert(result() === "aabb")
+            assert(matches.length === 3)
+        })
+    })
+})