Update: Add flag/config for running tasks from CLI in series

README.md

@@ -111,6 +111,7 @@ Supported configurations properties:
 | flags.tasksDepth   | Set default depth of task dependency tree. |
 | flags.gulpfile     | Set a default gulpfile |
 | flags.silent       | Silence logging by default |
+| flags.series       | Run tasks given on the CLI in series (the default is parallel) |
 
 ## Flags
 
@@ -207,6 +208,11 @@ __Some flags only work with gulp 4 and will be ignored when invoked against gulp
       <td></td>
       <td>Continue execution of tasks upon failure.</td>
     </tr>
+    <tr>
+      <td>--series</td>
+      <td></td>
+      <td>Run tasks given on the CLI in series (the default is parallel).</td>
+    </tr>
     <tr>
       <td>--log-level</td>
       <td>-L</td>

lib/shared/cliOptions.js

@@ -98,6 +98,11 @@ module.exports = {
     desc: chalk.gray(
       'Continue execution of tasks upon failure.'),
   },
+  series: {
+    type: 'boolean',
+    desc: chalk.gray(
+      'Run tasks given on the CLI in series (the default is parallel).'),
+  },
   'log-level': {
     alias: 'L',
     // Type isn't needed because count acts as a boolean

lib/shared/config/cli-flags.js

@@ -5,6 +5,7 @@ var copyProps = require('copy-props');
 var fromTo = {
   'flags.silent': 'silent',
   'flags.continue': 'continue',
+  'flags.series': 'series',
   'flags.logLevel': 'logLevel',
   'flags.compactTasks': 'compactTasks',
   'flags.tasksDepth': 'tasksDepth',

lib/versioned/^4.0.0-alpha.1/index.js

@@ -75,7 +75,7 @@ function execute(opts, env, config) {
     }
     try {
       log.info('Using gulpfile', chalk.magenta(tildify(env.configPath)));
-      gulpInst.parallel(toRun)(function(err) {
+      gulpInst[!opts.series ? 'parallel' : 'series'](toRun)(function(err) {
         if (err) {
           exit(1);
         }

lib/versioned/^4.0.0-alpha.2/index.js

@@ -75,7 +75,7 @@ function execute(opts, env, config) {
     }
     try {
       log.info('Using gulpfile', chalk.magenta(tildify(env.configPath)));
-      gulpInst.parallel(toRun)(function(err) {
+      gulpInst[!opts.series ? 'parallel' : 'series'](toRun)(function(err) {
         if (err) {
           exit(1);
         }

lib/versioned/^4.0.0/index.js

@@ -75,7 +75,7 @@ function execute(opts, env, config) {
     }
     try {
       log.info('Using gulpfile', chalk.magenta(tildify(env.configPath)));
-      gulpInst.parallel(toRun)(function(err) {
+      gulpInst[!opts.series ? 'parallel' : 'series'](toRun)(function(err) {
         if (err) {
           exit(1);
         }

test/config-flags-series.js

@@ -0,0 +1,62 @@
+'use strict';
+
+var expect = require('expect');
+var path = require('path');
+
+var skipLines = require('gulp-test-tools').skipLines;
+var eraseTime = require('gulp-test-tools').eraseTime;
+var eraseLapse = require('gulp-test-tools').eraseLapse;
+var runner = require('gulp-test-tools').gulpRunner;
+
+var fixturesDir = path.join(__dirname, 'fixtures/config');
+var runner = require('gulp-test-tools').gulpRunner({ verbose: false }).basedir(fixturesDir);
+
+describe('config: flags.series', function() {
+
+  it('Should run in series if `flags.series` is true in .gulp.*',
+    function(done) {
+      runner
+        .chdir('flags/series/t')
+        .gulp('task1 task2')
+        .run(cb);
+
+      function cb(err, stdout, stderr) {
+        expect(err).toEqual(null);
+        expect(stderr).toEqual('');
+
+        stdout = eraseLapse(eraseTime(skipLines(stdout, 1)));
+        expect(stdout).toEqual(
+          'Starting \'task1\'...\n' +
+          'Finished \'task1\' after ?\n' +
+          'Starting \'task2\'...\n' +
+          'Finished \'task2\' after ?\n' +
+          ''
+        );
+        done();
+      }
+    });
+
+  it('Should run in parallel if `flags.series` is false in .gulp.*',
+    function(done) {
+      runner
+        .chdir('flags/series/f')
+        .gulp('task1 task2')
+        .run(cb);
+
+      function cb(err, stdout, stderr) {
+        expect(err).toEqual(null);
+        expect(stderr).toEqual('');
+
+        stdout = eraseLapse(eraseTime(skipLines(stdout, 1)));
+        expect(stdout).toEqual(
+          'Starting \'task1\'...\n' +
+          'Starting \'task2\'...\n' +
+          'Finished \'task2\' after ?\n' +
+          'Finished \'task1\' after ?\n' +
+          ''
+        );
+        done();
+      }
+    });
+
+});

test/expected/flags-help.txt

@@ -18,5 +18,6 @@ Options:
   --no-color              Will force gulp and gulp plugins to not display colors, even when color support is detected.  [boolean]
   --silent, -S            Suppress all gulp logging.  [boolean]
   --continue              Continue execution of tasks upon failure.  [boolean]
+  --series                Run tasks given on the CLI in series (the default is parallel).  [boolean]
   --log-level, -L         Set the loglevel. -L for least verbose and -LLLL for most verbose. -LLL is default.  [count]
 

test/expected/flags-tasks-json.json

@@ -1 +1 @@
-{"label":"gulp-cli/test/fixtures/gulpfiles","nodes":[{"label":"test1","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"noop","type":"function","nodes":[]}]}]},{"label":"test2","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"test1","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"noop","type":"function","nodes":[]}]}]},{"label":"noop","type":"function","nodes":[]}]}]},{"label":"test3","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"described","type":"function","nodes":[]}]}]},{"label":"test4","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"errorFunction","type":"function","nodes":[]},{"label":"anon","type":"function","nodes":[]}]}]},{"label":"default","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"test1","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"noop","type":"function","nodes":[]}]}]},{"label":"test3","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"described","type":"function","nodes":[]}]}]},{"label":"noop","type":"function","nodes":[]}]}]}]}
+{"label":"gulp-cli/test/fixtures/gulpfiles","nodes":[{"label":"test1","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"noop","type":"function","nodes":[]}]}]},{"label":"test2","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"test1","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"noop","type":"function","nodes":[]}]}]},{"label":"noop","type":"function","nodes":[]}]}]},{"label":"test3","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"described","type":"function","nodes":[]}]}]},{"label":"test4","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"errorFunction","type":"function","nodes":[]},{"label":"anon","type":"function","nodes":[]}]}]},{"label":"test5","nodes":[],"type":"task"},{"label":"test6","nodes":[],"type":"task"},{"label":"default","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"test1","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"noop","type":"function","nodes":[]}]}]},{"label":"test3","type":"task","nodes":[{"label":"<series>","type":"function","branch":true,"nodes":[{"label":"described","type":"function","nodes":[]}]}]},{"label":"noop","type":"function","nodes":[]}]}]}]}

test/expected/flags-tasks-simple.txt

@@ -2,4 +2,6 @@ test1
 test2
 test3
 test4
+test5
+test6
 default

test/expected/flags-tasks.txt

@@ -20,7 +20,9 @@ gulp-cli/test/fixtures/gulpfiles
 ├─┬ test3
 │ └─┬ <series>
 │   └── described
-└─┬ test4
-  └─┬ <series>
-    ├── errorFunction
-    └── anon
+├─┬ test4
+│ └─┬ <series>
+│   ├── errorFunction
+│   └── anon
+├── test5
+└── test6

test/fixtures/config/flags/series/f/.gulp.json

@@ -0,0 +1,5 @@
+{
+  "flags": {
+    "series": false
+  }
+}

test/fixtures/config/flags/series/f/gulpfile.js

@@ -0,0 +1,14 @@
+'use strict';
+
+var gulp = require('gulp');
+
+function noop(cb) {
+  cb();
+}
+
+function delayed(cb) {
+  setTimeout(cb, 100);
+}
+
+gulp.task('task1', delayed);
+gulp.task('task2', noop);

test/fixtures/config/flags/series/t/.gulp.json

@@ -0,0 +1,5 @@
+{
+  "flags": {
+    "series": true
+  }
+}

test/fixtures/config/flags/series/t/gulpfile.js

@@ -0,0 +1,14 @@
+'use strict';
+
+var gulp = require('gulp');
+
+function noop(cb) {
+  cb();
+}
+
+function delayed(cb) {
+  setTimeout(cb, 100);
+}
+
+gulp.task('task1', delayed);
+gulp.task('task2', noop);

test/fixtures/gulpfiles/gulpfile.js

@@ -3,22 +3,30 @@
 var gulp = require('gulp');
 
 function noop(cb) {
-  return cb();
+  cb();
 }
+
 function described(cb) {
   cb();
 }
+
+function delayed(cb) {
+  setTimeout(cb, 100);
+}
+
 function errorFunction() {
   throw new Error('Error!');
 }
 function anon(cb) {
-  return cb();
+  cb();
 }
 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('default', gulp.series('test1', 'test3', noop));

test/flags-series.js

@@ -0,0 +1,52 @@
+'use strict';
+
+var expect = require('expect');
+var runner = require('gulp-test-tools').gulpRunner;
+var eraseTime = require('gulp-test-tools').eraseTime;
+var eraseLapse = require('gulp-test-tools').eraseLapse;
+var skipLines = require('gulp-test-tools').skipLines;
+
+describe('flag: --series', function() {
+
+  it('runs tasks in series when flag is set', function(done) {
+    runner({ verbose: false })
+      .gulp('test5 test6', '--series', '--cwd ./test/fixtures/gulpfiles')
+      .run(cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toEqual(null);
+      expect(stderr).toEqual('');
+      stdout = eraseLapse(eraseTime(skipLines(stdout, 2)));
+      expect(stdout).toEqual(
+        'Starting \'test5\'...\n' +
+        'Finished \'test5\' after ?\n' +
+        'Starting \'test6\'...\n' +
+        'Finished \'test6\' after ?\n' +
+        ''
+      );
+      done();
+    }
+  });
+
+  it('runs tasks in parallel when flag is not set', function(done) {
+    runner({ verbose: false })
+      .gulp('test5 test6', '--cwd ./test/fixtures/gulpfiles')
+      .run(cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toEqual(null);
+      expect(stderr).toEqual('');
+      expect(stdout).toNotMatch('Starting \'anon\'');
+      stdout = eraseLapse(eraseTime(skipLines(stdout, 2)));
+      expect(stdout).toEqual(
+        'Starting \'test5\'...\n' +
+        'Starting \'test6\'...\n' +
+        'Finished \'test6\' after ?\n' +
+        'Finished \'test5\' after ?\n' +
+        ''
+      );
+      done();
+    }
+  });
+
+});