Implements --no-default-rc and --use-rc

__tests__/commands/_helpers.js

@@ -92,6 +92,7 @@ export function makeConfigFromDirectory(cwd: string, reporter: Reporter, flags:
       production: flags.production,
       updateChecksums: !!flags.updateChecksums,
       focus: !!flags.focus,
+      extraneousRcFiles: flags.useRc,
     },
     reporter,
   );

__tests__/fixtures/cache/custom-location/.yarnrc

@@ -0,0 +1 @@
+cache-folder "./uses-default-yarnrc"

__tests__/fixtures/cache/custom-location/custom-yarnrc

@@ -0,0 +1 @@
+cache-folder "./uses-custom-yarnrc"

__tests__/fixtures/cache/custom-location/package.json

@@ -0,0 +1 @@
+{}

__tests__/integration.js

@@ -271,6 +271,26 @@ test('--cwd option', async () => {
   expect(packageJson.dependencies['left-pad']).toBeDefined();
 });
 
+const customCacheCwd = `${__dirname}/fixtures/cache/custom-location`;
+
+test('default rc', async (): Promise<void> => {
+  const [stdoutOutput] = await runYarn(['cache', 'dir'], {cwd: customCacheCwd});
+
+  expect(stdoutOutput).toMatch(/uses-default-yarnrc/);
+});
+
+test('--no-default-rc', async (): Promise<void> => {
+  const [stdoutOutput] = await runYarn(['cache', 'dir', '--no-default-rc'], {cwd: customCacheCwd});
+
+  expect(stdoutOutput).not.toMatch(/uses-default-yarnrc/);
+});
+
+test('--use-rc', async (): Promise<void> => {
+  const [stdoutOutput] = await runYarn(['cache', 'dir', '--use-rc', './custom-yarnrc'], {cwd: customCacheCwd});
+
+  expect(stdoutOutput).toMatch(/uses-custom-yarnrc/);
+});
+
 test('yarnrc arguments', async () => {
   const cwd = await makeTemp();
 

__tests__/rc.js

@@ -10,6 +10,22 @@ test('resolve .yarnrc args and use --cwd if present', () => {
   expect(args.indexOf('--foo') !== -1).toBe(true);
 });
 
+test("don't resolve .yarnrc args from the default locations when using --no-default-rc", () => {
+  const args = getRcArgs('install', ['--cwd', path.join(fixturesLoc, 'empty'), '--no-default-rc']);
+  expect(args.indexOf('--foo') !== -1).toBe(false);
+});
+
+test('resolve .yarnrc args from the extraneous locations when using --use-rc', () => {
+  const args = getRcArgs('install', [
+    '--cwd',
+    path.join(fixturesLoc, 'empty'),
+    '--no-default-rc',
+    '--use-rc',
+    path.join(fixturesLoc, 'empty', '.yarnrc'),
+  ]);
+  expect(args.indexOf('--foo') !== -1).toBe(true);
+});
+
 test('resolve .yarnrc args and use process.cwd() if no --cwd present', () => {
   const cwd = process.cwd();
   process.chdir(path.join(fixturesLoc, 'empty'));

__tests__/registries/npm-registry.js

@@ -77,7 +77,7 @@ describe('request', () => {
   function createRegistry(config: Object): Object {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
     npmRegistry.config = config;
     return {
       request(url: string, options: Object, packageName: string): Object {
@@ -577,7 +577,7 @@ describe('isRequestToRegistry functional test', () => {
   test('request to registry url matching', () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     const validRegistryUrls = [
       ['http://foo.bar:80/foo/bar/baz', 'http://foo.bar/foo/'],
@@ -609,7 +609,7 @@ describe('isRequestToRegistry functional test', () => {
   test('isRequestToRegistry with custom host prefix', () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     npmRegistry.config = {
       'custom-host-suffix': 'some.host.org',
@@ -659,7 +659,7 @@ describe('isScopedPackage functional test', () => {
   test('identifies scope correctly', () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     packageIdents.forEach(([pathname, scope]) => {
       expect(npmRegistry.isScopedPackage(pathname)).toEqual(!!scope.length);
@@ -671,7 +671,7 @@ describe('getRequestUrl functional test', () => {
   test('returns pathname when it is a full URL', () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
     const fullURL = 'HTTP://xn--xample-hva.com:80/foo/bar/baz';
 
     expect(npmRegistry.getRequestUrl('https://my.registry.co', fullURL)).toEqual(fullURL);
@@ -680,7 +680,7 @@ describe('getRequestUrl functional test', () => {
   test('correctly handles registries lacking a trailing slash', () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
     const registry = 'https://my.registry.co/registry';
     const pathname = 'foo/bar/baz';
 
@@ -692,7 +692,7 @@ describe('getScope functional test', () => {
   describe('matches scope correctly', () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     packageIdents.forEach(([pathname, scope]) => {
       expect(npmRegistry.getScope(pathname)).toEqual(scope);
@@ -705,7 +705,7 @@ describe('getPossibleConfigLocations', () => {
     const testCwd = './project/subdirectory';
     const {mockRequestManager, mockRegistries} = createMocks();
     const reporter = new BufferReporter({verbose: true});
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, reporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, reporter, true, []);
     await npmRegistry.getPossibleConfigLocations('npmrc', reporter);
 
     const logs = reporter.getBuffer().map(logItem => logItem.data);
@@ -730,7 +730,7 @@ describe('checkOutdated functional test', () => {
   test('homepage URL from top level', async () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     mockRequestManager.request = () => {
       return {
@@ -758,7 +758,7 @@ describe('checkOutdated functional test', () => {
   test('homepage URL fallback to wanted package manifest', async () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     mockRequestManager.request = () => {
       return {
@@ -786,7 +786,7 @@ describe('checkOutdated functional test', () => {
   test('repository URL from top level', async () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     mockRequestManager.request = () => {
       return {
@@ -816,7 +816,7 @@ describe('checkOutdated functional test', () => {
   test('repository URL fallback to wanted package manifest', async () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     mockRequestManager.request = () => {
       return {
@@ -846,7 +846,7 @@ describe('checkOutdated functional test', () => {
   test('unpublished package (no versions)', async () => {
     const testCwd = '.';
     const {mockRequestManager, mockRegistries, mockReporter} = createMocks();
-    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter);
+    const npmRegistry = new NpmRegistry(testCwd, mockRegistries, mockRequestManager, mockReporter, true, []);
 
     mockRequestManager.request = () => {
       return {

bin/yarn.js

@@ -24,6 +24,9 @@ if (majorVer < 4) {
   // be truthy when built with webpack :(
   var cli = require(dirPath + 'cli');
   if (!cli.autoRun) {
-    cli.default();
+    cli.default().catch(function(error) {
+      console.error(error.stack || error.message || error);
+      process.exitCode = 1;
+    });
   }
 }

src/cli/index.js

@@ -41,21 +41,33 @@ function findProjectRoot(base: string): string {
   return base;
 }
 
-export function main({
+export async function main({
   startArgs,
   args,
   endArgs,
 }: {
   startArgs: Array<string>,
   args: Array<string>,
   endArgs: Array<string>,
-}) {
+}): Promise<void> {
+  const collect = (val, acc) => {
+    acc.push(val);
+    return acc;
+  };
+
   loudRejection();
   handleSignals();
 
   // set global options
   commander.version(version, '-v, --version');
   commander.usage('[command] [flags]');
+  commander.option('--no-default-rc', 'prevent Yarn from automatically detecting yarnrc files');
+  commander.option(
+    '--use-rc <path>',
+    'specifies a rc file that Yarn should use (.yarnrc only, not .npmrc)',
+    collect,
+    [],
+  );
   commander.option('--verbose', 'output verbose messages on internal operations');
   commander.option('--offline', 'trigger an error if any required dependencies are not available in local cache');
   commander.option('--prefer-offline', 'use network only if dependencies are not available in local cache');
@@ -477,11 +489,13 @@ export function main({
 
   const cwd = command.shouldRunInCurrentCwd ? commander.cwd : findProjectRoot(commander.cwd);
 
-  config
+  await config
     .init({
       cwd,
       commandName,
 
+      enableDefaultRc: commander.defaultRc,
+      extraneousRcFiles: commander.useRc,
       binLinks: commander.binLinks,
       modulesFolder: commander.modulesFolder,
       linkFolder: commander.linkFolder,
@@ -564,7 +578,7 @@ export function main({
 }
 
 async function start(): Promise<void> {
-  const rc = getRcConfigForCwd(process.cwd());
+  const rc = getRcConfigForCwd(process.cwd(), process.argv.slice(2));
   const yarnPath = rc['yarn-path'];
 
   if (yarnPath && !boolifyWithDefault(process.env.YARN_IGNORE_PATH, false)) {
@@ -590,7 +604,7 @@ async function start(): Promise<void> {
     const args = process.argv.slice(2, doubleDashIndex === -1 ? process.argv.length : doubleDashIndex);
     const endArgs = doubleDashIndex === -1 ? [] : process.argv.slice(doubleDashIndex);
 
-    main({startArgs, args, endArgs});
+    await main({startArgs, args, endArgs});
   }
 }
 
@@ -599,7 +613,10 @@ async function start(): Promise<void> {
 export const autoRun = module.children.length === 0;
 
 if (require.main === module) {
-  start();
+  start().catch(error => {
+    console.error(error.stack || error.message || error);
+    process.exitCode = 1;
+  });
 }
 
 export default start;

src/config.js

@@ -49,6 +49,9 @@ export type ConfigOptions = {
   nonInteractive?: boolean,
   scriptsPrependNodePath?: boolean,
 
+  enableDefaultRc?: boolean,
+  extraneousRcFiles?: Array<string>,
+
   // Loosely compare semver for invalid cases like "0.01.0"
   looseSemver?: ?boolean,
 
@@ -96,6 +99,10 @@ export default class Config {
     this._init({});
   }
 
+  //
+  enableDefaultRc: boolean;
+  extraneousRcFiles: Array<string>;
+
   //
   looseSemver: boolean;
   offline: boolean;
@@ -273,7 +280,14 @@ export default class Config {
       const Registry = registries[key];
 
       // instantiate registry
-      const registry = new Registry(this.cwd, this.registries, this.requestManager, this.reporter);
+      const registry = new Registry(
+        this.cwd,
+        this.registries,
+        this.requestManager,
+        this.reporter,
+        this.enableDefaultRc,
+        this.extraneousRcFiles,
+      );
       await registry.init({
         registry: opts.registry,
       });
@@ -386,6 +400,9 @@ export default class Config {
 
     this.commandName = opts.commandName || '';
 
+    this.enableDefaultRc = !!opts.enableDefaultRc;
+    this.extraneousRcFiles = opts.extraneousRcFiles || [];
+
     this.preferOffline = !!opts.preferOffline;
     this.modulesFolder = opts.modulesFolder;
     this.globalFolder = opts.globalFolder || constants.GLOBAL_MODULE_DIRECTORY;

src/rc.js

@@ -1,5 +1,6 @@
 /* @flow */
 
+import {readFileSync} from 'fs';
 import {dirname, resolve} from 'path';
 
 import commander from 'commander';
@@ -11,24 +12,45 @@ import * as rcUtil from './util/rc.js';
 const PATH_KEYS = new Set(['yarn-path', 'cache-folder', 'global-folder', 'modules-folder', 'cwd']);
 
 // given a cwd, load all .yarnrc files relative to it
-export function getRcConfigForCwd(cwd: string): {[key: string]: string} {
-  return rcUtil.findRc('yarn', cwd, (fileText, filePath) => {
-    const {object: values} = parse(fileText, 'yarnrc');
-
-    // some keys reference directories so keep their relativity
-    for (const key in values) {
-      if (PATH_KEYS.has(key.replace(/^(--)?([^.]+\.)*/, ''))) {
-        values[key] = resolve(dirname(filePath), values[key]);
-      }
+export function getRcConfigForCwd(cwd: string, args: Array<string>): {[key: string]: string} {
+  const config = {};
+
+  if (args.indexOf('--no-default-rc') === -1) {
+    Object.assign(
+      config,
+      rcUtil.findRc('yarn', cwd, (fileText, filePath) => {
+        return loadRcFile(fileText, filePath);
+      }),
+    );
+  }
+
+  for (let index = args.indexOf('--use-rc'); index !== -1; index = args.indexOf('--use-rc', index + 1)) {
+    const value = args[index + 1];
+
+    if (value && value.charAt(0) !== '-') {
+      Object.assign(config, loadRcFile(readFileSync(value).toString(), value));
+    }
+  }
+
+  return config;
+}
+
+function loadRcFile(fileText: string, filePath: string): {[key: string]: string} {
+  const {object: values} = parse(fileText, 'yarnrc');
+
+  // some keys reference directories so keep their relativity
+  for (const key in values) {
+    if (PATH_KEYS.has(key.replace(/^(--)?([^.]+\.)*/, ''))) {
+      values[key] = resolve(dirname(filePath), values[key]);
     }
+  }
 
-    return values;
-  });
+  return values;
 }
 
 // get the built of arguments of a .yarnrc chain of the passed cwd
-function buildRcArgs(cwd: string): Map<string, Array<string>> {
-  const config = getRcConfigForCwd(cwd);
+function buildRcArgs(cwd: string, args: Array<string>): Map<string, Array<string>> {
+  const config = getRcConfigForCwd(cwd, args);
 
   const argsForCommands: Map<string, Array<string>> = new Map();
 
@@ -82,7 +104,7 @@ export function getRcArgs(commandName: string, args: Array<string>, previousCwds
   const origCwd = extractCwdArg(args) || process.cwd();
 
   // get a map of command names and their arguments
-  const argMap = buildRcArgs(origCwd);
+  const argMap = buildRcArgs(origCwd, args);
 
   // concat wildcard arguments and arguments meant for this specific command
   const newArgs = [...(argMap.get('*') || []), ...(argMap.get(commandName) || [])];