replace.env.js

#!/usr/bin/env node
var path = require('path');
var process = require('process');
var fs = require('fs');
var npmConfigJson = JSON.parse(process.env.npm_config_argv).original;
var indexEnv = npmConfigJson.indexOf('--env');
var env = '';

if (indexEnv !== -1) {
  env = npmConfigJson[indexEnv+1];
} else if (npmConfigJson.indexOf('--sandbox3') !== -1) {
  env = 'sandbox3';	
} else if (npmConfigJson.indexOf('--sandbox4') !== -1) {
  env = 'sandbox4';	
} else if (npmConfigJson.indexOf('--staging') !== -1) {
  env = 'staging';	
} else if (npmConfigJson.indexOf('--production') !== -1) {
  env = 'production';	
} else {
  // no arguments, use the actual config.ts
  return
}

var envVars;

try {
  envVars = require(path.join('../', 'env', env + '.json'));
} catch(e) {
  envVars = {};
}

const ENV = Object.assign(envVars, {
  environment: JSON.stringify(env)
})

var content = fs.readFileSync('./src/providers/config/config.ts.sample');
var contentReplace = content.toString()
  .replace(/ENV.api_url/, ENV.api_url)
  .replace(/ENV.login.client_id/, ENV.client_id_login)
  .replace(/ENV.login.client_secret/, ENV.client_secret_login)
  .replace(/ENV.google_maps_key/, ENV.google_maps_key);
var wstream = fs.createWriteStream('./src/providers/config/config.ts');
wstream.write(contentReplace);
wstream.end();