bin/lb-ios

#!/usr/bin/env node

var fs = require('fs');
var path = require('path');
var semver = require('semver');
var mkdirp = require('mkdirp');
var optimist = require('optimist');

// var generator = require(loopback-sdk-ios-codegen);
var generator = require('../lib/objc-codegen');

var argv = optimist
  .usage('Generate iOS Objective-C client code for your LoopBack application.' +
    '\nUsage:' +
    '\n    $0 [options] path-to-app ios-client-dir-path' +
    '\n' +
    '\nExample:' +
    '\n    $0 -p XX server/app.js client/ios/gen-src')
  .describe('p', 'The prefix for generated iOS object names.')
  .default('p', '')
  .alias({ p: 'model-name-prefix' })
  .describe('v', 'Print more info about the progress.')
  .alias({ v: 'verbose' })
  .demand(2)
  .argv;

try {
  var appFile = path.resolve(argv._[0]);
  var clientDir = path.resolve(argv._[1]);
  var modelPrefix = argv['model-name-prefix'];
  var verbose = argv['verbose'];

  console.error('Loading LoopBack app %j', appFile);
  var app = require(appFile);
  assertLoopBackVersion(app);
  if (verbose) {
    console.error('Loopback version: ' + app.loopback.version);
  }

  console.error('Generating iOS models with prefix %j', modelPrefix);
  var files = generator.objcModels(app, modelPrefix, verbose);

  if (!fs.existsSync(clientDir)){
    mkdirp.mkdirP.sync(clientDir);
  }

  for (var objcFileName in files) {
    var filepath = path.resolve(clientDir, objcFileName);
    console.log('Writing: ' + filepath);
    if (verbose) {
      console.error('--');
      console.error(files[objcFileName]);
      console.error('--\n');
    }
    fs.writeFileSync(filepath, files[objcFileName]);
  }
  
  console.error('Done\n');
}
catch(err) {
  console.error('\nERROR: ' + err.message + '\n');
  if (verbose) {
    console.error(err.stack);
  }
  process.exitCode = 1;
}

// The app.js scaffolded by `slc lb project` loads strong-agent module that
// used to have a bug where it prevented the application from exiting.
// To work around that issue, we are explicitly exiting here.
//
// The exit is deferred to the next tick in order to prevent the Node bug:
// https://github.com/joyent/node/issues/3584
process.nextTick(function() {
  process.exit();
});

//--- helpers ---//

function assertLoopBackVersion(app) {
  // app.loopback property was added before v2.0.0.
  // If app.loopback is undefined, then it's an unsupported version.
  if (typeof app.loopback === 'undefined' || semver.lt(app.loopback.version, '2.0.0')) {
    throw new Error('LoopBack version too old\n' +
      'The code generator does not support applications based\n' +
      'on LoopBack versions older than 2.0.0. Please upgrade your\n' +
      'project to a recent version of LoopBack and run this tool again.\n');
  }
}