Repository https://npm.dev.studioweare.com

WE_ARE NPM Assets

Expose NPM modules assets folder.

Installation

$ npm install weare-npm-assets

Usage

Say we're in a app named module that have lodash as a dependency.

var express = require('express');
var app = express();
var npmAssets = require('weare-npm-assets')();

var lodashScriptPath = npmAssets.getFilePath(require, 'lodash');
// -> /app/modules/lodash/index.js
var myAppScriptPath = npmAssets.getFilePath(require, null, 'javascripts/app.js', 'src');
// -> /app/src/javascripts/app.js

npmAssets.expressServe(app);
// Will create 2 virtual paths:
//   "/app/modules/lodash" real path -> "/{root-of-the-app}/node_modules/lodash"
//   "/app/src"            real path -> "/{root-of-the-app}/src"

app.use('/', function (req, res) {
  res.send(
    '<script src="'+lodashScriptPath+'" />' +
    '<script src="'+myAppScriptPath+'" />'
  );
});

Debug

To see the virtual paths generated by "getFilePath" and the static paths (virtual/hard) that are created, you can setup the environment variable DEBUG to npm-assets when starting your app:

$ DEBUG=npm-assets node bin/www

Function references

Most useful:

• getFilePath(cRequire, dependency, file, relPath)
• getFileHardPath(cRequire, dependency, file)
• expressServe(app)

Expert mode:

• addStaticPath (cRequire, dependency, relVirtualPath, relHardPath, mainRelPath)
• getMainFileRelPath(cRequire, dependency)
• getFolderPath(cRequire, dependency, mainRelPath)

getFilePath(cRequire, dependency, file, relPath)

/**
 * Get the virtual path of a file contain in a module or one of his dependency.
 *
 * By passing the reference of the "require" function, the contextual dependency
 * will be processed by "require" to retrieve the right module folder.
 *
 * This will create a public static path that expose the entire module or one
 * of his subfolder.
 *
 * Ex: Module X require module A and B. Module A can be found at the same level
 * that module X but module B have a specific version so it's found in X/node_modules/B.
 *
 * @param Function cRequire
 *   The contextual "require" function.
 * @param String dependency
 *   (optionnal) The name of the main module dependency. When used, the final
 *   path of the file looks like this:
 *   /{main-module}/modules/{dependency}/{file}
 * @param String file
 *   (optionnal) The module relative file path. By default, this is the main
 *   module's file.
 * @param String relPath
 *   (optionnal) The relative folder path in which to get the file. Useful for
 *   not exposing the entire module folder, see this example:
 *     getFilePath(require, null, 'src/javascripts/app.js')
 *       Will expose the folder of the entire module (/).
 *     getFilePath(require, null, 'javascripts/app.js', 'src')
 *      Will only expose the "src" folder of the module (/src).
 *   For non-weird results, don't use if "file" is undefined.
 *
 * @return String
 *   The virtual path of the file.
 */

getFileHardPath(cRequire, dependency, file)

/**
 * Get the hardpath of a file contain in a module or one of his dependency.
 *
 * @param Function cRequire
 *   The contextual "require" function.
 * @param String dependency
 *   (optionnal) The name of the main module dependency. If it's undefined, the
 *   file will be search in the main module.
 * @param String file
 *   (optionnal) The module relative file path. By default, this is the main
 *   module's file.
 *
 * @return String
 *   The hardpath of the file.
 */

expressServe(app)

/**
 * Serve all the static path with Express.
 *
 * @param Function express
 *   Express reference.
 * @param Object app
 *   The Express application.
 */

addStaticPath (cRequire, dependency, relVirtualPath, relHardPath, mainRelPath)

/**
 * Add a static path for a module or one of it's dependency and return the
 * resulting virtual path.
 *
 * @param Function cRequire
 *   The main module contextual "require" function.
 * @param String dependency
 *   (optionnal) The name of the main module dependency.
 * @param String relVirtualPath
 *   (optionnal) A path that will be append to the main module/dependency
 *   virtual path folder. Useful to follow the same hierarchy of the module's
 *   folders when exposing only a specific folder with the "relHardPath" argument
 *   ("src" folder for example).
 * @param String relHardPath
 *   (optionnal) A path that will be append to the main module/dependency
 *   hard path folder. Useful to not expose the entire module folder
 *   (only "src" folder for example).
 * @param String mainRelPath
 *   (optionnal) The relative path of the main file of the module. Useful for
 *   NPM module that don't have main file. In that case, point to any file
 *   inside the module folder. Default: Will try to find the main file in
 *   "package.json" file, then default to "index.js".
 */

getMainFileRelPath(cRequire, dependency)

/**
 * Get the relative path of the main file of the main module/dependency.
 *
 * @param Function cRequire
 *   The main module contextual "require" function.
 * @param String dependency
 *   (optionnal) The name of the main module dependency.
 *
 * @return String
 *   Return the relative path of the main file of the module.
 */

getFolderPath(cRequire, dependency, mainRelPath)

/**
 * Get the absolute folder path of the main module/dependency.
 *
 * @param Function cRequire
 *   The main module contextual "require" function.
 * @param String dependency
 *   (optionnal) The name of the main module dependency.
 * @param String mainRelPath
 *   (optionnal) The relative path of the main file of the module. Useful for
 *   NPM module that don't have main file. In that case, point to any file
 *   inside the module folder. Default: Will try to find the main file in
 *   "package.json" file, then default to "index.js".
 *
 * @return String
 *   Return the absolute folder path of the module.
 */