Gulp.js: Difference between revisions

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{{Short description|Server-side JavaScript build tool}}

{{lowercase title}}

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{{How -to|date=October 2016}}

{{context|date=January 2017}}

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{{Infobox Softwaresoftware

| name = gulp

| logo = Gulp.js Logo.svg

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| caption =

| other_names =

| author = Eric Schoffstall<ref name=":0">{{Cite book|title=Developing a Gulp Edge|publisher=Bleeding Edge Press|year=2014|isbn=978-1-939902-14-6|edition=1st|author1=Jed Mao |author2=Maximilian Schmitt |author3=Tomasz Stryjewski |author4=Cary Country Holt |author5=William Lubelski }}</ref>

| author = Eric Schoffstall

| developer = Blaine Bublitz, Eric Schoffstall

| released = {{Start date and age|2013|09|26|df=yes}}<ref>{{cite web | url=https://libraries.io/npm/gulp/versions | access-date=2020-12-31 | title=Release Date of Version 1.0.0}}</ref><!-- As per template guideline, this is the release date of version 1.0.0 -->

| ver layout =

| discontinued =

| latest release version = 45.0.20

| latest_release_date = {{Start date and age|20192024|0503|0629|df=yes}}<ref name="latest-releases">{{cite web | url=https://github.com/gulpjs/gulp/releases | access-date=2020-12-31 | title=Releases · gulpjs/gulp| website=[[GitHub]] }}</ref>

| latest preview version =

| latest preview date =

| repo = {{URL|https://github.com/gulpjs/gulp}}

| qid =

| programming language = [[JavaScript]] <!-- Node.js is NOT a language, it is a platform -->

| middleware =

| tools =

| engine =

| operating system = [[Linux]], [[macOS]], [[Windows]] <!-- As per template guideline, do not write "Cross-platform" here -->

| platform = [[Node.js]] <!-- As per template guideline, do not write "Cross-platform" here -->

| included with =

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| language footnote =

| genre = [[Toolkit]]

| license = [[MIT License]]<ref>{{cite web | url=https://github.com/gulpjs/gulp/blob/master/LICENSE | title=LICENSE file on GitHub | website=[[GitHub]] | access-date=2020-12-31}}</ref><ref>{{cite web | url=https://www.npmjs.com/package/gulp | title=License field from gulp - npm | access-date=2020-12-31}}</ref>

| website =

| AsOf =

| games list =

}}

'''gulp''' is an [[Open-source software|open-source]] [[JavaScript]] toolkit created by Eric Schoffstall<ref name=":0">{{Cite book|title=Developing a Gulp Edge|publisher=Bleeding Edge Press|year=2014|isbn=978-1-939902-14-6|edition=1st|author1=Jed Mao |author2=Maximilian Schmitt |author3=Tomasz Stryjewski |author4=Cary Country Holt |author5=William Lubelski }}</ref>, used as a streaming [[build system]] (similar to a more package-focussedfocused [[Make (software)|Make]]) in [[front-end web development]].

It is a task runner built on [[Node.js]] and [[npm (software)|npm]], used for automation of time-consuming and repetitive tasks involved in web development like [[Minification (programming)|minification]], concatenation, cache busting, [[unit testing]], [[Linting software|linting]], optimization, etc.<ref>{{cite web|url=https://www.smashingmagazine.com/2014/06/building-with-gulp/ |title=Building With Gulp – Smashing Magazine |website=Smashingmagazine.com |date=11 June 2014 |access-date=2016-12-14}}</ref>

gulp uses a code-over-configuration approach to define its tasks and relies on its small, single-purpose plugins to carry them out. The gulp ecosystem includes more than 3500 such plugins.<ref>{{cite web|url=https://gulpjs.com/plugins/ |title=gulp.js plugin registry |website=Gulpjs.com |access-date=2016-12-14}}</ref>

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== Need for a task runner ==

Task-runners like gulp and [[Grunt (software)|Grunt]] are built on Node.js rather than [[Node Package Manager|npm]], because the basic npm scripts are inefficient when executing multiple tasks.

Even though some developers prefer [[Node Package Manager|npm]] scripts because they can be simple and easy to implement, there are numerous ways where gulp and Grunt seem to have an advantage over each other, and the default provided scripts.<ref name="gulpjs/gulp">{{cite web|url=https://github.com/gulpjs/gulp/blob/master/docs/CLI.md|title=gulpjs/gulp|website=GitHub|access-date=2016-09-23}}</ref> Grunt runs tasks by transforming files and saves them as new ones in temporary folders, and the output of one task is taken as input for another and so on until the output reaches the destination folder. This involves a lot of [[I/O]] calls and the creation of many temporary files. Whereas gulp streams through the file system and doesdo not require any of these temporary locations, decreasing the number of I/O calls thus, improving performance.<ref>{{cite web|url=https://css-tricks.com/gulp-for-beginners/ |title=Gulp for Beginners |publisher=CSS-Tricks |date=2015-09-01 |access-date=2016-12-14}}</ref> Grunt uses configuration files to perform tasks, whereas gulp requires its build file to be coded. In Grunt, each plugin needs to be configured to match its input ___location to the previous plugin’splugin's output. In gulp, the plugins are automatically pipe-lined.<ref name="github.com"/>

== Operation ==

The gulp tasks are run from a [[command-line interface]] (CLI)<ref name="gulpjs/gulp"/> shell and require two files, <code>package.json</code>, which is used to list the various plugins for gulp, and <code>gulpfile.js</code> (or simply <code>gulpfile</code>), These, as per build tool convention, are often found in the root directory of the package's source code. The gulpfile contains most of the logic that gulp needs to run it'sits build tasks. First, all the necessary modules are loaded and then tasks are defined in the gulpfile. All the necessary plugins specified in the gulpfile are listed in the devDependencies section of <code>package.json</code>.<ref name=":2">{{cite web|url=https://docs.npmjs.com/cli/install|title=install {{!}} npm Documentation|website=docs.npmjs.com|access-date=2016-09-22}}</ref> The default task runs by <code>$gulp</code>. Individual tasks can be defined by gulp.task and are run by <code>gulp <task> <othertask></code>.<ref name=":1">{{cite web|url=https://github.com/gulpjs/gulp/blob/master/docs/getting-started.md|title=gulpjs/gulp|website=GitHub|access-date=2016-09-23}}</ref> Complex tasks are defined by chaining the plugins with the help of <code>.pipe()</code> operator.<ref name=":3" />

== Anatomy of gulpfile ==

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The subsequent image task optimizes images. <Code>gulp.src()</code> retrieves all the images with the extension .png, .gif or .jpg in the directory '''images-orig/'.''

<Code>.pipe(imagemin())</Code> channels the images found, through the optimization process and with <code>.pipe(gulp.dest())</code> the optimized images are saved to the '''images/' folder''. Without <code>gulp.dest()</code> the images would indeed be optimized, but are not stored.<ref>{{cite web |url=http://magazin.phlow.de/webdesign/gulp/ |title=Durchstarten mit Gulp.js – Websites optimieren, Arbeitsabläufe automatisieren |website=Magazin.phlow.de |date=2014-05-25 |access-date=2016-12-14 |archive-date=2017-06-16 |archive-url=https://web.archive.org/web/20170616233539/http://magazin.phlow.de/webdesign/gulp/ |url-status=dead }}</ref> Since the optimized images are stored to another folder, the original images remain unaltered.<ref name=":3">{{Cite book|title=Getting Started with Gulp|last=Maynard|first=Travis|publisher=Packt Publishing Ltd|year=2015|isbn=9781784393472}}</ref><syntaxhighlight lang="javascript">

// Images task

gulp.task('images', function () {

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==See also==

* [[Grunt (software)]]

* [[Browserify]]

==References==