mbland/slack-github-issues

#! /usr/bin/env node

var packageInfo = require('../package.json');
var Config = require('../lib/config');
var fs = require('fs');
var path = require('path');
var programName = path.basename(process.argv[1]);
var option = process.argv[2];
var usage = [
  'Usage:',
  '  ' + programName + ' [-hv|print-template]',
  '  ' + programName + ' validate <config.json>',
  '',
  'Where:',
  '  -h, --help, help        show this help',
  '  -v, --version, version  show version info',
  '  print-template          print an example slack-emoji-issues.json config',
  '  validate <config.json>  validate the specified config file'
].join('\n');

var showHelp, showVersion;

if (option === 'print-template') {
  var config = require('../config/slack-emoji-issues.json');
  console.log(JSON.stringify(config, null, 2));
  process.exit(0);
}

showHelp = (option === '-h' || option === '--help' || option === 'help');
showVersion = (option === '-v' || option === '--version' ||
  option === 'version');

if (showHelp) {
  console.log(usage);
} else if (showVersion) {
  console.log(packageInfo.name + ' v' + packageInfo.version);
}

if (showHelp || showVersion) {
  process.exit(0);
}

function exitWithError(message) {
  console.error(message);
  process.exit(1);
}

if (option === 'validate') {
  var configPath = process.argv[3],
      fullConfigPath = path.resolve(configPath),
      configData;

  if (configPath === undefined) {
    exitWithError('validate: no config file path specified');
  }

  if (!fs.existsSync(fullConfigPath)) {
    exitWithError(configPath + ': does not exist');
  }

  try {
    configData = require(fullConfigPath);
    new Config(configData);
  } catch (err) {
    exitWithError(err.message);
  }
  console.log(configPath + ': OK');

} else {
  if (process.argv.length !== 2) {
    console.error('Invalid arguments:', process.argv.slice(2).join(' '));
  }
  exitWithError(usage);
}