component-ls

#!/usr/bin/env node

/**
 * Module dependencies.
 */

var program = require('commander');
var component = require('..');
var archy = require('archy');
var path = require('path');
var resolve = path.resolve;
var lookup = component.lookup;
var fs = require('fs');
var exists = fs.existsSync;
var utils = component.utils;

// parse argv

program
  .option('-d, --depth <n>', 'set the depth to <n>', Infinity)
  .parse(process.argv);

// component.json required

if (!exists('component.json')) utils.fatal('missing component.json');

// output tree

var tree = tree('component.json');
console.log();
console.log(indent(archy(tree)));

/**
 * Return the dependency tree of the given config `file`.
 *
 * @param {String} file
 * @param {Array} paths
 * @return {Object}
 */

function tree(file, paths, depth){
  depth = depth || 0;
  var conf = require(resolve(file));
  var deps = Object.keys(conf.dependencies || {});
  var node = {};

  // local deps
  if (conf.local) deps = deps.concat(conf.local);

  // lookup paths
  paths = (paths || ['components']).concat(conf.paths);

  // label
  node.label = '\033[36m' + conf.name + '\033[m';
  node.label += ' \033[90m' + (conf.version || '') + '\033[m';

  // --depth n
  if (++depth > program.depth) return node;

  // dependencies
  node.nodes = deps.map(function(dep){
    var dep = dep.replace('/', '-');
    var file = lookup(dep, paths);
    if (!file) throw new Error('failed to resolve location of "' + dep + '"');
    file = resolve(file, 'component.json');
    return tree(file, paths, depth);
  });

  return node;
}

/**
 * Indent `str`.
 */

function indent(str) {
  return str.replace(/^/gm, '  ');
}