feat(options): add --silent flag and option for squelching output

cli.js

@@ -38,6 +38,12 @@ var argv = require('yargs')
     default: defaults.noVerify,
     global: true
   })
+  .option('silent', {
+    describe: 'Don\'t print logs and errors',
+    type: 'boolean',
+    default: defaults.silent,
+    global: true
+  })
   .help()
   .alias('help', 'h')
   .example('$0', 'Update changelog and tag release')

defaults.json

@@ -4,4 +4,5 @@
   "firstRelease": false,
   "sign": false,
   "noVerify": false,
+  "silent": false
 }

index.js

@@ -143,16 +143,20 @@ function createIfMissing (argv) {
 }
 
 function checkpoint (argv, msg, args, figure) {
-  console.info((figure || chalk.green(figures.tick)) + ' ' + util.format.apply(util, [msg].concat(args.map(function (arg) {
-    return chalk.bold(arg)
-  }))))
+  if (!argv.silent) {
+    console.info((figure || chalk.green(figures.tick)) + ' ' + util.format.apply(util, [msg].concat(args.map(function (arg) {
+      return chalk.bold(arg)
+    }))))
+  }
 }
 
 function printError (argv, msg, opts) {
-  opts = objectAssign({
-    level: 'error',
-    color: 'red'
-  }, opts)
+  if (!argv.silent) {
+    opts = objectAssign({
+      level: 'error',
+      color: 'red'
+    }, opts)
 
-  console[opts.level](chalk[opts.color](msg))
+    console[opts.level](chalk[opts.color](msg))
+  }
 }

test.js

@@ -199,6 +199,13 @@ describe('cli', function () {
     execCli('-n').code.should.equal(0)
   })
 
+  it('does not print output when the --silent flag is passed', function () {
+    var result = execCli('--silent')
+    result.code.should.equal(0)
+    result.stdout.should.equal('')
+    result.stderr.should.equal('')
+  })
+
   it('does not display `npm publish` if the package is private', function () {
     writePackageJson('1.0.0', {private: true})