sarcina
Fully-automatic web project bundler
Last updated a month ago by vanilagy .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install sarcina 
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Sarcina

  1. Overview
  2. Installation
  3. Usage
  4. Programmatic examples
  5. Options

Overview

What is it? And why?

Sarcina is as super-simple, zero-configuration and fast bundling tool, made to get your web projects ready for production. It is meant to be a works-out-of-the-box alternative to traditional bundlers like Webpack, whose complicated configuration is often overkill for most projects.

That said, Sarcina purposefully targets only regular vanilla non-framework web projects - in other words, projects that don't need to be built while working on them. In-development build tools usually add overhead to the development process, while simultaneously increasing project complexity. Sarcina is therefore intended to be run only when bundling a project for deployment, not constantly during development.

What does it do?

At its core, Sarcina creates a production distribution folder by processing every markup file in a folder, parsing it for CSS and JavaScript elements, creating bundles using those files and re-inserting links to the bundles back into the markup. During this process, your HTML can be minified, your CSS minified and autoprefixed, and your JavaScript minified and transpiled.

The resulting folder has considerably less files and complexity, and is often much smaller in total size. Less and smaller files to load by the browser can improve the user experience drastically.

An example

Consider this source folder:

src
│   index.html
│   about.html  
└───css
|   │   base.css
|   │   about.css
└───js
    │   main.js
    │   util.js
    │   about.js
    │   constants.js
<!-- index.html -->
<html>
    <head>
        <title>Main Page</title>
        <link rel="stylesheet" href="css/base.css">
    </head>
    <body>
        <h1>Welcome!</h1>
        <script src="js/util.js"></script>
        <script src="js/main.js"></script>
    </body>
</html>

<!-- about.html -->
<html>
    <head>
        <title>About Page</title>
        <link rel="stylesheet" href="css/base.css">
        <link rel="stylesheet" href="css/about.css">
    </head>
    <body>
        <h1>About</h1>
        <p>This is a really dope page.</p>
        <script src="js/util.js"></script>
        <script src="js/main.js"></script>
        <script src="js/about.js" type="module"></script>
    </body>
</html>
/* base.css */
body {
    background: blue;
    display: none;
}
h1 {
    font-size: 22px;
}

/* about.css */
p {
    color: white;
}
// util.js
function showElement(element) {
    element.style.display = 'block';
}

// main.js
window.addEventListener('load', () => {
    console.log("Page loaded!");
    showElement(document.querySelector('body'));
});

// about.js
import { GOLDEN_RATIO } from './constants.js';
console.log("Oh, by the way, the golden ratio is " + GOLDEN_RATIO);

// constants.js
export const PI = Math.PI;
export const GOLDEN_RATIO = 1.61803398875;

After running Sarcina on this source folder, we get the following distribution folder:

dist
│   index.html
│   about.html  
└───bundles
    │   0.css
    │   1.css
    │   0.js
    │   1.js
<!-- index.html -->
<html>
    <head>
        <title>Main Page</title>
        <link rel="stylesheet" href="bundles/0.css">
    </head>
    <body>
        <h1>Welcome!</h1>
        <script src="bundles/0.js"></script>
    </body>
</html>

<!-- about.html -->
<html>
    <head>
        <title>About Page</title>
        <link rel="stylesheet" href="bundles/1.css">
    </head>
    <body>
        <h1>About</h1>
        <p>This is a really dope page.</p>
        <script src="bundles/0.js"></script>
        <script src="bundles/1.js"></script>
    </body>
</html>
/* 0.css */
body{background:blue;display:none;}h1{font-size:22px;}

/* 1.css */
body{background:blue;display:none;}h1{font-size:22px;}p{color:white;}
// 0.js
function showElement(element){element.style.display='block'};window.addEventListener('load',function(){console.log("Page loaded!"),showElement(document.querySelector('body'))});

// 1.js
console.log("Oh, by the way, the golden ratio is "+1.61803398875);

Sarcina took all the source files, minified and bundled them, and re-inserted them into the HTML (which was left unminified for demonstration purposes). More specifically, js/util.js and js/main.js were bundled together into bundles/0.js,while the ES6 Modules in js/about.js were automatically resolved by Sarcina and bundled into bundles/1.js. In index.html, css/base.css was bundled on its own, while in about.html, it was bundled with css/about.css.


Installation

Sarcina is used programatically. Simply require it using Node:

const sarcina = require('sarcina');

Usage

Sarcina has only one, core method:

sarcina.bundle([options])

Returns: A promise resolving to an object once bundling is complete. This object contains the boolean property success, indicating if the bundling succeeded, and the property error, which is null if there was none.

Programmatic examples

In the following example, the folder input is bundled into the folder output, and the success of the operation is printed:

sarcina.bundle({
    src: 'path/to/input',
    dist: 'path/to/output'
}).then((result) => console.log(result.success));

We might want to inject our bundled styles and scripts directly into our markup:

sarcina.bundle({
    src: 'path/to/input',
    dist: 'path/to/output',
    injectCss: true,
    injectScript: true
}).then((result) => console.log(result.success));

Here, we choose to bundle not to bundle any CSS:

sarcina.bundle({
    src: 'path/to/input',
    dist: 'path/to/output',
    bundleCss: false
}).then((result) => console.log(result.success));

We might want to support older JavaScript versions, but also still want to be able to read the resulting script:

sarcina.bundle({
    src: 'path/to/input',
    dist: 'path/to/output',
    transpileScript: sarcina.ES3,
    minifyScript: false
}).then((result) => console.log(result.success));

Our folder might contain files only meant for development, so we choose to ignore those:

sarcina.bundle({
    src: 'path/to/input',
    dist: 'path/to/output',
    ignore: ['test', '*.sh', 'assets/audio/*.wav']
}).then((result) => console.log(result.success));

Options

The following options can be used to configure a bundling process:

General options

Name Default Description
src ./src The path to the input directory.
dist ./dist The path to the output directory. This directory will be deleted and recreated on every run.
minifyMarkup true When set to true, HTML will be minified.
randomBundleNames true When set to true, bundles will be given random hexadecimal names. Otherwise, they will be numbered.

CSS-related options

Name Default Description
bundleCss true When set to true, CSS will be bundled.
cssInsertPosition sarcina.END_OF_HEAD Specifies the position in which CSS bundles will be inserted into the markup. Can be:

sarcina.LOCAL - Bundles will be inserted approximately where the elements they bundled once were. You should choose this if you want to leave the relative position to other HTML elements unchanged. This option is not reommended for CSS.
sarcina.START_OF_HEAD - Bundles will be inserted right after the opening <head> tag.
sarcina.END_OF_HEAD - Bundles will be inserted right before the closing </head> tag. In almost all cases, this is where your styles should be.
sarcina.START_OF_BODY - Bundles will be inserted right after the opening <body> tag.
sarcina.END_OF_BODY - Bundles will be inserted right before the closing </body> tag.
sarcina.START_OF_DOCUMENT - Bundles will be inserted right after the opening <html> tag.
sarcina.END_OF_DOCUMENT - Bundles will be inserted right before the closing </html> tag.
sarcina.START_OF_FILE - Bundles will be inserted at the very start of the file.
sarcina.END_OF_FILE - Bundles will be inserted at the very end of the file.
minifyCss true When set to true, CSS will be minified.
optimizeCss false When set to true, CSS will be optimized using CleanCSS.
autoprefixCss false When set to true, vendor prefixes will be automatically added to the CSS using PostCSS and Autoprefixer to achieve wider browser support.
handleInlineCss true Specifies whether or not inline CSS (that inbetween <style> tags) will be included by the bundler.
injectCss false When set to true, CSS will not be put into seperate files but instead be directly injected into the markup.
sanitizeInjectedCss true Replace certain characters in the injected CSS with their unicode representation in order to prevent broken HTML. There's no real reason to turn this off.
cssFileAction sarcina.KEEP_NECESSARY Specifies what to do with .css files found in the input directory. Can be:

sarcina.REMOVE_ALL - Copy no CSS files into the output directory.
sarcina.REMOVE_BUNDLED - Copy only those CSS files into the output directory that have not been included in any bundle.
sarcina.KEEP_NECESSARY - Keep all files that are listed in the handleCssFiles option. If bundleCss is set to false, also keep all the files that are included in the markup.
sarcina.KEEP_ALL - Copy all CSS files into the output directory.
missingCssFileTagAction sarcina.KEEP Specifies the action taken with <link> tags that point to a local file which doesn't exist. Can be:

sarcina.KEEP - Keep the tags, but don't process them.
sarcina.REMOVE - Remove the tags.
handledCssFiles [] Specifies a list of CSS files to be processed and replaced, independent of any markup - for example, if you wanted to minimize every file individually. Can be:

- An array of Globs, specifying all affected files
- 'all' - Process every file
- 'necessary' - Process all files included in the markup

Script-related options

Name Default Description
bundleScript true When set to true, scripts will be bundled.
scriptInsertPosition sarcina.LOCAL Specifies the position in which JS bundles will be inserted into the markup. Can be:

sarcina.LOCAL - Bundles will be inserted approximately where the elements they bundled once were. You should choose this if you want to leave the relative position to other HTML elements unchanged. This option is by far the best for scripts, as their relative position within the markup can play a vital role.
sarcina.START_OF_HEAD - Bundles will be inserted right after the opening <head> tag.
sarcina.END_OF_HEAD - Bundles will be inserted right before the closing </head> tag.
sarcina.START_OF_BODY - Bundles will be inserted right after the opening <body> tag.
sarcina.END_OF_BODY - Bundles will be inserted right before the closing </body> tag.
sarcina.START_OF_DOCUMENT - Bundles will be inserted right after the opening <html> tag.
sarcina.END_OF_DOCUMENT - Bundles will be inserted right before the closing </html> tag.
sarcina.START_OF_FILE - Bundles will be inserted at the very start of the file.
sarcina.END_OF_FILE - Bundles will be inserted at the very end of the file.
minifyScript true When set to true, scripts will be minified using UglifyES.
transpileScript false This option allows automatic transpilation of the JavaScript to earlier versions for increased browser support. Can be:

false - Don't transpile.
true - Transpile to ES5.
sarcina.ES3 - Transpile to ES3.
sarcina.ES5 - Transpile to ES5.
sarcina.ES6/sarcina.ES2015 - Transpile to ES6.
sarcina.ES2016 - Transpile to ES2016.
sarcina.ES2017 - Transpile to ES2017.
sarcina.ESNEXT - Transpile to ESNext.
iifeScript false When set to true, every bundle will be wrapped in an IIFE. This can be done to prevent globals from being created. This can be the desired outcome, however it could also break the interactions between multiple bundles that depend on their global variables.
insertPolyfill false When set to true, a Polyfill.io script will be inserted at the beginning of the <head> element. This script will read the browser's user agent string and intelligently include polyfills. Note that this insertion takes place regardless of the value of the bundleScript option.
handleInlineScript true Specifies whether or not inline JavaScript (that inbetween <script> tags) will be included by the bundler.
injectScript false When set to true, scripts will not be put into seperate files but instead be directly injected into the markup.
sanitizeInjectedScript true Replace certain characters in the injected script with their unicode representation in order to prevent broken HTML. There's no real reason to turn this off.
scriptFileAction sarcina.KEEP_NECESSARY Specifies what to do with .js files found in the input directory. Can be:

sarcina.REMOVE_ALL - Copy no JS files into the output directory.
sarcina.REMOVE_BUNDLED - Copy only those JS files into the output directory that have not been included in any bundle.
sarcina.KEEP_NECESSARY - Keep all files that are listed in the handleScriptFiles and handleModuleFiles option, aswell as all async scripts. If bundleScript is set to false, also keep all files that are included in the markup.
sarcina.KEEP_ALL - Copy all JS files into the output directory.
missingScriptFileTagAction sarcina.KEEP Specifies the action taken with <script tags that point to a local file which doesn't exist. Can be:

sarcina.KEEP - Keep the tags, but don't process them.
sarcina.REMOVE - Remove the tags.
uglifyOptionsOverride null An object, which can be used to override the default UglifyES settings, used for JavaScript minification.
handledScriptFiles [] Specifies a list of script files to be processed and replaced, independent of any markup - for example, if you wanted to minimize and transpile every file individually. Can be:

- An array of Globs, specifying all affected files
- 'all' - Process every file
- 'necessary' - Process all files included in the markup
handledModuleFiles [] Like handledScriptFiles, but it treats every file like an entry point to a ES6 module. all is not an option here.

File-related options

Name Default Description
removeEmptyDirectories true Whether or not empty directories should be removed. A directory is considered empty if it or its subdirectories contain no files.
keep [] An array containing Globs, specifying files and directories to be kept. Can be used to override certain automatic file deletion rules. Files listed in keep take precedence over ignore.
ignore [] An array containing Globs, specifying files and directories to be ignored and not copied.
ignoreGit true When set to true, .git and .gitignore will be ignored.
ignoreDsStore true When set to true, DSStore files created by macOS will be ignored.

Other options

Name Default Description
verbose false When set to true, sarcina will constantly print the process of the bundling process.
markupOptionOverride {} An object where its keys are Globs and its values are a subset of options from this list, which are then used to override the options for a given markup file matching the glob. This can be used to override/change options for specific markup files, for example when we want leave one file un-minified.
individuallyHandledFilesOptionOverride {} Same as markupOptionOverride, but instead can be used to target individually-handled files specified in handledCssFiles, handledScriptFiles and handledModuleFiles. Example: We might want to wrap all our bundles in IIFEs, but not individual JavaScript files. Hence, we would use this option and set iifeScript to false for all JavaScript files.

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