tooljs-tool/lib/modules.js

Composible Tooling for JavaScript

/**
 * Module dependencies.
 */

var path = require('path');

/**
 * TODO: move to a separate module.
 */

module.exports = function(){
  var paths = [];
  var win32 = process.platform === 'win32';

  // Walk up the CWD and add `node_modules/` folder lookup on each level
  process.cwd().split(path.sep).forEach(function(part, i, parts){
    var lookup = path.join.apply(path, parts.slice(0, i + 1).concat(['node_modules']));
    if (!win32) lookup = '/' + lookup;
    paths.push(lookup);
  });

  // Adding global NPM directories
  // We tried using NPM to get the global modules path, but it haven't work out
  // because of bugs in the parseable implementation of `ls` command and mostly
  // performance issues. So, we go with our best bet for now.
  if (process.env.NODE_PATH) {
    paths = compact(process.env.NODE_PATH.split(path.delimiter)).concat(paths);
  } else {
    // global node_modules should be 5 directory up this one (most of the time)
    paths.push(path.join(__dirname, '../../../../..'));

    // adds support for generator resolving when yeoman-generator has been linked
    paths.push(path.join(path.dirname(process.argv[1]), '../..'));

    // Default paths for each system
    if (win32) {
      paths.push(path.join(process.env.APPDATA, 'npm/node_modules'));
    } else {
      paths.push('/usr/lib/node_modules');
      paths.push('/usr/local/lib/node_modules');
    }
  }

  return paths.reverse();
};

/**
 * Remove blank items from array.
 */

function compact(arr) {
  var res = [];
  for (var i = 0, n = arr.length; i < n; i++) {
    if (!arr[i]) continue;
    res.push(arr[i]);
  }
  return res;
}