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# require-directory Recursively iterates over specified directory, `require()`'ing each file, and returning a nested hash structure containing those modules. **[Follow me (@troygoode) on Twitter!](https://twitter.com/intent/user?screen_name=troygoode)** [](https://nodei.co/npm/require-directory/) [](http://travis-ci.org/troygoode/node-require-directory) ## How To Use ### Installation (via [npm](https://npmjs.org/package/require-directory)) ```bash $ npm install require-directory ``` ### Usage A common pattern in node.js is to include an index file which creates a hash of the files in its current directory. Given a directory structure like so: * app.js * routes/ * index.js * home.js * auth/ * login.js * logout.js * register.js `routes/index.js` uses `require-directory` to build the hash (rather than doing so manually) like so: ```javascript var requireDirectory = require('require-directory'); module.exports = requireDirectory(module); ``` `app.js` references `routes/index.js` like any other module, but it now has a hash/tree of the exports from the `./routes/` directory: ```javascript var routes = require('./routes'); // snip app.get('/', routes.home); app.get('/register', routes.auth.register); app.get('/login', routes.auth.login); app.get('/logout', routes.auth.logout); ``` The `routes` variable above is the equivalent of this: ```javascript var routes = { home: require('routes/home.js'), auth: { login: require('routes/auth/login.js'), logout: require('routes/auth/logout.js'), register: require('routes/auth/register.js') } }; ``` *Note that `routes.index` will be `undefined` as you would hope.* ### Specifying Another Directory You can specify which directory you want to build a tree of (if it isn't the current directory for whatever reason) by passing it as the second parameter. Not specifying the path (`requireDirectory(module)`) is the equivelant of `requireDirectory(module, __dirname)`: ```javascript var requireDirectory = require('require-directory'); module.exports = requireDirectory(module, './some/subdirectory'); ``` For example, in the [example in the Usage section](#usage) we could have avoided creating `routes/index.js` and instead changed the first lines of `app.js` to: ```javascript var requireDirectory = require('require-directory'); var routes = requireDirectory(module, './routes'); ``` ## Options You can pass an options hash to `require-directory` as the 2nd parameter (or 3rd if you're passing the path to another directory as the 2nd parameter already). Here are the available options: ### Whitelisting Whitelisting (either via RegExp or function) allows you to specify that only certain files be loaded. ```javascript var requireDirectory = require('require-directory'), whitelist = /onlyinclude.js$/, hash = requireDirectory(module, {include: whitelist}); ``` ```javascript var requireDirectory = require('require-directory'), check = function(path){ if(/onlyinclude.js$/.test(path)){ return true; // don't include }else{ return false; // go ahead and include } }, hash = requireDirectory(module, {include: check}); ``` ### Blacklisting Blacklisting (either via RegExp or function) allows you to specify that all but certain files should be loaded. ```javascript var requireDirectory = require('require-directory'), blacklist = /dontinclude\.js$/, hash = requireDirectory(module, {exclude: blacklist}); ``` ```javascript var requireDirectory = require('require-directory'), check = function(path){ if(/dontinclude\.js$/.test(path)){ return false; // don't include }else{ return true; // go ahead and include } }, hash = requireDirectory(module, {exclude: check}); ``` ### Visiting Objects As They're Loaded `require-directory` takes a function as the `visit` option that will be called for each module that is added to module.exports. ```javascript var requireDirectory = require('require-directory'), visitor = function(obj) { console.log(obj); // will be called for every module that is loaded }, hash = requireDirectory(module, {visit: visitor}); ``` The visitor can also transform the objects by returning a value: ```javascript var requireDirectory = require('require-directory'), visitor = function(obj) { return obj(new Date()); }, hash = requireDirectory(module, {visit: visitor}); ``` ### Renaming Keys ```javascript var requireDirectory = require('require-directory'), renamer = function(name) { return name.toUpperCase(); }, hash = requireDirectory(module, {rename: renamer}); ``` ### No Recursion ```javascript var requireDirectory = require('require-directory'), hash = requireDirectory(module, {recurse: false}); ``` ## Run Unit Tests ```bash $ npm run lint $ npm test ``` ## License [MIT License](http://www.opensource.org/licenses/mit-license.php) ## Author [Troy Goode](https://github.com/TroyGoode) ([troygoode@gmail.com](mailto:troygoode@gmail.com))
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