A recipe for passing parameters from the command line

docs/README.md

@@ -13,6 +13,7 @@ See [the FAQ](FAQ.md) for the answers to commonly asked questions.
 * [Working with multiple sources in one task](recipes/using-multiple-sources-in-one-task.md)
 * [Mocha test runner with gulp](recipes/mocha-test-runner-with-gulp.md)
 * [Rebuild only files that change](recipes/rebuild-only-files-that-change.md)
+* [Pass parameters from the command line](recipes/pass-params-from-cli.md)
 * [Using external config file](recipes/using-external-config-file.md)
 * [Introduction to node.js streams](https://github.com/substack/stream-handbook)
 

docs/recipes/pass-params-from-cli.md

@@ -0,0 +1,27 @@
+# Pass parameters from the command line
+## bonus: keeping those tasks DRY
+
+---
+
+`gulpfile.js`
+
+```js
+// npm install gulp gulp-if gulp-uglify
+var gulp   = require('gulp');
+var gulpif = require('gulp-if');
+var uglify = require('gulp-uglify');
+
+var isProduction = gulp.env.type === 'production';
+
+gulp.task('scripts', function () {
+  return gulp.src('**/*.js')
+    .pipe(gulpif(isProduction, uglify())) // only minify if production
+    .pipe(gulp.dest('dist'));
+});
+```
+
+---
+
+`cli`
+
+`gulp scripts --type production`

test/tasks.js

@@ -1,5 +1,5 @@
 /*jshint node:true */
-/*global describe:false, it:false, beforeEach:false, afterEach:false */
+/*global describe:false, it:false */
 "use strict";
 
 var gulp = require('../');