bower/bin/bower

#!/usr/bin/env node

var semver = require('semver');
var nopt   = require('nopt');
var path   = require('path');
var pkg    = require(path.join(__dirname, '..', 'package.json'));

var template = require('../lib/util/template');
var bower    = require('../lib');

var command;
var options;
var shorthand;
var input   = process.argv;
var cmdList = Object.keys(bower.commands);
var nodeVer = process.version;
var reqVer  = pkg.engines.node;

process.title = 'bower';

if (reqVer && !semver.satisfies(nodeVer, reqVer)) {
  throw new Error('Required: node ' + reqVer);
}

shorthand = { 'v': ['--version'] };
options   = { version: Boolean };
options   = nopt(options, shorthand, process.argv);

bower.version = pkg.version;

if (options.version) return console.log(bower.version);
if (~cmdList.indexOf(command = options.argv.remain && options.argv.remain.shift())) bower.command = command;

bower.commands[bower.command || 'help'].line(input)
  .on('data', function (data) {
    if (data) console.log(data);
  })
  .on('end', function (data) {
    if (data) console.log(data);
  })
  .on('error', function (err)  {
    if (options.verbose) throw err;
    else console.log(template('error', { message: err.message }, true));
  });