appcenter-cli/scripts/download-swagger.js

Command line tool for Visual Studio App Center

// Command line tool to download swagger files from the given environment.
const _ = require('lodash');
const fs = require('fs');
const path = require('path');
const request = require('request');

const endpoints = {
  prod: "https://api.appcenter.ms",
  int: "https://bifrost-int.trafficmanager.net",
  dev: "https://appcenter-api.dev.xtc.xmn.co"
};

const defaultVersion = 'preview';

const parseOpts = {
  string: [ 'env', 'version' ],
  alias: { env: 'e', version: 'v' },
  default: { env: 'prod', version: defaultVersion }
};

const args = require('minimist')(process.argv.slice(2), parseOpts);

function streamDone(origResolve, origReject) {
  let finished = false;
  return {
    resolve: () => {
      if (!finished) {
        finished = true;
        origResolve();
      }
    },
    reject: (e) => {
      if (!finished) {
        finished = true;
        origReject(e);
      }
    }
  };
}

function swaggerDest(environment, version) {
  return path.join('swagger', 'bifrost.swagger.before.json');
}

function downloadSwagger(environment, version) {
  return Promise.resolve()
  .then(() => {
    if (!endpoints[environment]) {
      console.error(`Unknown environment ${environment}`);
      return -1;
    }

    const swaggerUrl = `${endpoints[environment]}/${version}/swagger.json`;
    console.log(`Downloading swagger from ${swaggerUrl}`);
    return new Promise((resolve, reject) => {
      let sd = streamDone(resolve, reject);
      const rs = request(swaggerUrl);
      const s = rs.pipe(fs.createWriteStream(swaggerDest(environment, version)));

      rs.on('error', (e) => { sd.reject(e); })
      s.on('error', (e) => sd.reject(e))
        .on('finish', () => sd.resolve());
    });
  });
}

module.exports = {
  downloadSwagger,
  defaultVersion,
  parseOpts
};