Suppress logging when --tasks-json flag is specified

.eslintrc

@@ -1,6 +1,7 @@
 {
   "extends": "gulp",
   "rules": {
+    "max-len": [1, 90],
     "max-statements": [1, 40],
     "no-console": "off"
   }

index.js

@@ -61,9 +61,6 @@ var usage =
 var parser = yargs.usage(usage, cliOptions);
 var opts = parser.argv;
 
-// Set up event listeners for logging temporarily.
-toConsole(log, opts);
-
 cli.on('require', function(name) {
   log.info('Requiring external module', ansi.magenta(name));
 });
@@ -85,21 +82,22 @@ cli.on('respawn', function(flags, child) {
   log.info('Respawned to PID:', pid);
 });
 
-
 function run() {
   cli.prepare({
     cwd: opts.cwd,
     configPath: opts.gulpfile,
     require: opts.require,
     completion: opts.completion,
   }, function(env) {
-
     var cfgLoadOrder = ['home', 'cwd'];
     var cfg = loadConfigFiles(env.configFiles['.gulp'], cfgLoadOrder);
     opts = mergeConfigToCliFlags(opts, cfg);
     env = mergeConfigToEnvFlags(env, cfg);
     env.configProps = cfg;
 
+    // Set up event listeners for logging again after configuring.
+    toConsole(log, opts);
+
     cli.execute(env, handleArguments);
   });
 }
@@ -117,18 +115,16 @@ function handleArguments(env) {
     process.env.UNDERTAKER_SETTLE = 'true';
   }
 
-  // Set up event listeners for logging again after configuring.
-  toConsole(log, opts);
-
   if (opts.help) {
     parser.showHelp(console.log);
     exit(0);
   }
 
+  // Anything that needs to print outside of the logging mechanism should use console.log
   if (opts.version) {
-    log.info('CLI version', cliVersion);
+    console.log('CLI version', cliVersion);
     if (env.modulePackage && typeof env.modulePackage.version !== 'undefined') {
-      log.info('Local version', env.modulePackage.version);
+      console.log('Local version', env.modulePackage.version);
     }
     exit(0);
   }

lib/shared/log/to-console.js

@@ -32,7 +32,7 @@ function toConsole(log, opts) {
 
   // Return immediately if logging is
   // not desired.
-  if (opts.tasksSimple || opts.silent) {
+  if (opts.tasksSimple || opts.tasksJson || opts.help || opts.version || opts.silent) {
     // Keep from crashing process when silent.
     log.on('error', noop);
     return;

test/config-flags-gulpfile.js

@@ -100,11 +100,14 @@ describe('config: flags.gulpfile', function() {
     function cb(err, stdout, stderr) {
       expect(err).toEqual(null);
       expect(stderr).toEqual('');
-      expect(eraseTime(stdout)).toEqual(
-        'Requiring external module babel-register\n' +
-        'clean!\n' +
-        'build!\n' +
-      '');
+
+      var requiring = eraseTime(headLines(stdout, 1));
+      expect(requiring).toEqual('Requiring external module babel-register');
+      var clean = eraseTime(headLines(stdout, 1, 4));
+      expect(clean).toEqual('clean!');
+      var build = eraseTime(headLines(stdout, 1, 7));
+      expect(build).toEqual('build!');
+
       done(err);
     }
   });

test/fixtures/config/flags/gulpfile/autoload/.gulp.json

@@ -1,6 +1,5 @@
 {
   "flags": {
-    "silent": true,
     "gulpfile": "other_folder/gulpfile-exports.babel.js"
   }
 }

test/fixtures/gulpfiles/gulpfile-babel.babel.js

@@ -0,0 +1,43 @@
+'use strict';
+
+var gulp = require('gulp');
+
+function noop(cb) {
+  cb();
+}
+
+function described(cb) {
+  cb();
+}
+
+function delayed(cb) {
+  setTimeout(cb, 100);
+}
+
+function errorFunction() {
+  throw new Error('Error!');
+}
+function anon(cb) {
+  cb();
+}
+
+function notCompleting1() {
+  // Callback is not called
+}
+
+function notCompleting2() {
+  // Callback is not called
+}
+
+described.description = 'description';
+
+gulp.task('test1', gulp.series(noop));
+gulp.task('test2', gulp.series('test1', noop));
+gulp.task('test3', gulp.series(described));
+gulp.task('test4', gulp.series(errorFunction, anon));
+gulp.task('test5', delayed);
+gulp.task('test6', noop);
+gulp.task('test7', notCompleting1);
+gulp.task('test8', notCompleting2);
+
+gulp.task('default', gulp.series('test1', 'test3', noop));

test/flags-help.js

@@ -44,4 +44,18 @@ describe('flag: --help', function() {
     }
   });
 
+  it('avoids printing "Requiring external module *"', function(done) {
+    runner({ verbose: false })
+      .gulp('--help --gulpfile ./test/fixtures/gulpfiles/gulpfile-babel.babel.js')
+      .run(cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toEqual(null);
+      expect(stderr).toEqual('');
+      stdout = eraseFirstSpace(stdout);
+      expect(stdout).toEqual(outputText);
+      done(err);
+    }
+  });
+
 });

test/flags-tasks-json.js

@@ -19,7 +19,6 @@ describe('flag: --tasks-json', function() {
     function cb(err, stdout, stderr) {
       expect(err).toEqual(null);
       expect(stderr).toEqual('');
-      stdout = skipLines(stdout, 1);
       expect(JSON.parse(stdout)).toEqual(expected);
       done(err);
     }
@@ -48,4 +47,19 @@ describe('flag: --tasks-json', function() {
     }
   });
 
+  it('avoids printing "Requiring external module *"', function(done) {
+    // Disable the timeout for old node versions
+    this.timeout(0);
+
+    runner({ verbose: false })
+      .gulp('--tasks-json --gulpfile ./test/fixtures/gulpfiles/gulpfile-babel.babel.js')
+      .run(cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toEqual(null);
+      expect(stderr).toEqual('');
+      expect(JSON.parse(stdout)).toEqual(expected);
+      done(err);
+    }
+  });
 });

test/flags-tasks-simple.js

@@ -23,4 +23,20 @@ describe('flag: --tasks-simple', function() {
     }
   });
 
+  it('avoids printing "Requiring external module *"', function(done) {
+    // Disable the timeout for old node versions
+    this.timeout(0);
+
+    runner({ verbose: false })
+      .gulp('--tasks-simple --gulpfile ./test/fixtures/gulpfiles/gulpfile-babel.babel.js')
+      .run(cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toEqual(null);
+      expect(stderr).toEqual('');
+      expect(stdout).toEqual(outputText);
+      done(err);
+    }
+  });
+
 });

test/flags-version.js

@@ -2,7 +2,6 @@
 
 var expect = require('expect');
 var runner = require('gulp-test-tools').gulpRunner;
-var eraseTime = require('gulp-test-tools').eraseTime;
 
 var cliVersion = require('../package.json').version;
 var gulpVersion = require('gulp/package.json').version;
@@ -17,7 +16,23 @@ describe('flag: --version', function() {
     function cb(err, stdout, stderr) {
       expect(err).toEqual(null);
       expect(stderr).toEqual('');
-      stdout = eraseTime(stdout);
+      expect(stdout).toEqual(
+        'CLI version ' + cliVersion + '\n' +
+        'Local version ' + gulpVersion + '\n' +
+        ''
+      );
+      done(err);
+    }
+  });
+
+  it('avoids printing "Requiring external module *"', function(done) {
+    runner({ verbose: false })
+      .gulp('--version --gulpfile ./test/fixtures/gulpfiles/gulpfile-babel.babel.js')
+      .run(cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toEqual(null);
+      expect(stderr).toEqual('');
       expect(stdout).toEqual(
         'CLI version ' + cliVersion + '\n' +
         'Local version ' + gulpVersion + '\n' +