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https://github.com/liriliri/eustia

Tool for generating utility libraries
https://github.com/liriliri/eustia

bundler utility

Last synced: 20 days ago
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Tool for generating utility libraries

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README 

        


    




[中文](doc/README_CN.md)



# Eustia



[![NPM version][npm-image]][npm-url]

[![Build status][travis-image]][travis-url]

[![Test coverage][codecov-image]][codecov-url]

[![License][license-image]][npm-url]



[npm-image]: https://img.shields.io/npm/v/eustia?style=flat-square 

[npm-url]: https://npmjs.org/package/eustia

[travis-image]: https://img.shields.io/travis/liriliri/eustia?style=flat-square

[travis-url]: https://travis-ci.org/liriliri/eustia

[codecov-image]: https://img.shields.io/codecov/c/github/liriliri/eustia?style=flat-square

[codecov-url]: https://codecov.io/github/liriliri/eustia?branch=master

[license-image]: https://img.shields.io/npm/l/eustia?style=flat-square



Eustia is a tool for generating JavaScript utility libraries. It scans your code 

to generate libraries containing only methods needed on the fly.



![screen shot](https://eustia.liriliri.io/static/img/eustia-screenshot.gif)



## Installation



You can install Eustia using Node Package Manager(**npm**).



```bash

npm install -g eustia

```



## Quick Example



Suppose you want to use trim function in index.html, just write the code down as 

follows:



```html



    

    Eustia

    



    

    var projectName = _.trim(' Eustia ');

    // Some code...

    



```



Run command:



```bash

eustia build

```



The tool will scan you html code and generate a file name **util.js**(Default 

output file name). And that is it, everything is just done!



## Use a Configuration File



You can use Eustia with command lines totally. It usually follows the same

pattern described below:



```bash

eustia build -o util.js index.html *.js ...

```



It's also possible to use a configuration file to save settings. This is pretty 

helpful especially when you want to generate multiple utility libraries for 

different sections of your website.



Just create a file named **.eustia** in your project root.



```json

{

    "page": {

        "files": "./layout/**/*.jade",

        "output": "./static/js/eustia.js"

    },

    "node": {

        "files": ["./lib/*.js", "./tool/**/*.js"],

        "output": "./lib/util.js"

    }

}

```



Running Eustia without any sub commands, the tool will find **.eustia** under 

current working directory to read configuration to generate libraries. It is 

almost the same as running build command from console, just a different way of 

passing options.



For a full list of options can be used, please check

[document](https://eustia.liriliri.io/docs.html#commands) page.



## Prepare Modules



Materials must be prepared first to cook a good meal. Right now, our materials 

is a bunch of small modules. Eustia provides many 

[utilities](https://eustia.liriliri.io/module.html) itself(currently under 

development). Still, there are times you want to add your own ones. 

To achieve that, create a directory named **eustia** in the root directory.



Now, let's say I want to have a function to compare version numbers. The first 

step is to create a js file named **compareVersion.js** in **eustia** directory. 

Then fills it with actual codes to finish the procedure.



```javascript

// eustia/compareVersion.js

_('isStr each'); // dependencies



// export object

function exports(v1, v2)

{

    if (!isStr(v1) || !isStr(v2)) return;

    ...

}

```



Now you can use **compareVersion** anywhere in your project.



Using option **library** allows you to search functions in other paths, 

quite useful when sharing functions among several projects. Besides, 

**Lodash** functions is available by using 

[eustia-lodash](https://github.com/liriliri/eustia-lodash).