Rc args extra tests

__tests__/fixtures/lifecycle-scripts/yarnrc-cli-command-specific-ko/.yarnrc

@@ -0,0 +1 @@
+--install.cache-folder /tmp/foobar

__tests__/fixtures/lifecycle-scripts/yarnrc-cli-command-specific-ko/package.json

@@ -0,0 +1,2 @@
+{
+}

__tests__/fixtures/lifecycle-scripts/yarnrc-cli-command-specific-ok/.yarnrc

@@ -0,0 +1 @@
+--cache.cache-folder /tmp/foobar

__tests__/fixtures/lifecycle-scripts/yarnrc-cli-command-specific-ok/package.json

@@ -0,0 +1,2 @@
+{
+}

__tests__/lifecycle-scripts.js

@@ -30,11 +30,21 @@ async function execCommand(cmd: string, packageName: string, env = process.env):
   });
 }
 
-test('should add the yarnrc values to the command line', async () => {
+test('should add the global yarnrc arguments to the command line', async () => {
   const stdout = await execCommand('cache dir', 'yarnrc-cli');
   expect(stdout.replace(/\\/g, '/')).toMatch(/^\/tmp\/foobar\/v[0-9]+\n$/);
 });
 
+test('should add the command-specific yarnrc arguments to the command line if the command name matches', async () => {
+  const stdout = await execCommand('cache dir', 'yarnrc-cli-command-specific-ok');
+  expect(stdout.replace(/\\/g, '/')).toMatch(/^\/tmp\/foobar\/v[0-9]+\n$/);
+});
+
+test('should not add the command-specific yarnrc arguments if the command name doesn\'t match', async () => {
+  const stdout = await execCommand('cache dir', 'yarnrc-cli-command-specific-ko');
+  expect(stdout.replace(/\\/g, '/')).not.toMatch(/^\/tmp\/foobar\/v[0-9]+\n$/);
+});
+
 test('should allow overriding the yarnrc values from the command line', async () => {
   const stdout = await execCommand('cache dir --cache-folder /tmp/toto', 'yarnrc-cli');
   expect(stdout.replace(/\\/g, '/')).toMatch(/^\/tmp\/toto\/v[0-9]+\n$/);

src/rc.js

@@ -60,8 +60,10 @@ const buildRcArgs = () => Object.keys(getRcConf()).reduce((argLists, key) => {
 
   if (typeof value === 'string') {
     argLists[namespace] = argLists[namespace].concat([`--${arg}`, value]);
-  } else {
+  } else if (value === true) {
     argLists[namespace] = argLists[namespace].concat([`--${arg}`]);
+  } else if (value === false) {
+    argLists[namespace] = argLists[namespace].concat([`--no-${arg}`]);
   }
 
   return argLists;