text: /**
   * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS-IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  'use strict';
  
  const argv = require('minimist')(process.argv.slice(2));
  const globby = require('globby');
  const log = require('fancy-log');
  const path = require('path');
  const url = require('url');
  const util = require('util');
  const {
    gitCommitHash,
    gitCiMasterBaseline,
    shortSha,
  } = require('../../common/git');
  const {
    isPullRequestBuild,
    isPushBuild,
    ciPushBranch,
    ciRepoSlug,
  } = require('../../common/ci');
  const {
    VERSION: internalRuntimeVersion,
  } = require('../../compile/internal-version');
  const {cyan, green, red, yellow} = require('ansi-colors');
  const {report, Report} = require('@ampproject/filesize');
  
  const requestPost = util.promisify(require('request').post);
  
  const filesizeConfigPath = require.resolve('./filesize.json');
  const fileGlobs = require(filesizeConfigPath).filesize.track;
  const normalizedRtvNumber = '1234567890123';
  
  const expectedGitHubRepoSlug = 'ampproject/amphtml';
  const bundleSizeAppBaseUrl = 'https://amp-bundle-size-bot.appspot.com/v0/';
  const replacementExpression = new RegExp(internalRuntimeVersion, 'g');
  
  /**
   * Get the brotli bundle sizes of the current build after normalizing the RTV number.
   *
   * @return {Map<string, number>} the bundle size in KB rounded to 2 decimal
   *   points.
   */
  async function getBrotliBundleSizes() {
    const bundleSizes = {};
  
    log(cyan('brotli'), 'bundle sizes are:');
    await report(
      filesizeConfigPath,
      (content) => content.replace(replacementExpression, normalizedRtvNumber),
      class extends Report {
        update(context) {
          const completed = super.getUpdated(context);
          for (const complete of completed) {
            const [filePath, sizeMap] = complete;
            const relativePath = path.relative('.', filePath);
            const reportedSize = parseFloat((sizeMap[0][0] / 1024).toFixed(2));
            log(' ', cyan(relativePath) + ':', green(reportedSize + 'KB'));
            bundleSizes[relativePath] = reportedSize;
          }
        }
      }
    );
  
    return bundleSizes;
  }
  
  /**
   * Store the bundle size of a commit hash in the build artifacts storage
   * repository to the passed value.
   */
  async function storeBundleSize() {
    if (!isPushBuild() || ciPushBranch() !== 'master') {
      log(
        yellow('Skipping'),
        cyan('--on_push_build') + ':',
        'this action can only be performed on `master` push builds during CI'
      );
      return;
    }
  
    if (ciRepoSlug() !== expectedGitHubRepoSlug) {
      log(
        yellow('Skipping'),
        cyan('--on_push_build') + ':',
        'this action can only be performed during CI builds on the',
        cyan(expectedGitHubRepoSlug),
        'repository'
      );
      return;
    }
  
    const commitHash = gitCommitHash();
    try {
      const response = await requestPost({
        uri: url.resolve(
          bundleSizeAppBaseUrl,
          path.join('commit', commitHash, 'store')
        ),
        json: true,
        body: {
          token: process.env.BUNDLE_SIZE_TOKEN,
          bundleSizes: await getBrotliBundleSizes(),
        },
      });
      if (response.statusCode < 200 || response.statusCode >= 300) {
        throw new Error(
          `${response.statusCode} ${response.statusMessage}: ` + response.body
        );
      }
    } catch (error) {
      log(red('Could not store the bundle size'));
      log(red(error));
      process.exitCode = 1;
      return;
    }
  }
  
  /**
   * Mark a pull request as skipped, via the AMP bundle-size GitHub App.
   */
  async function skipBundleSize() {
    if (isPullRequestBuild()) {
      const commitHash = gitCommitHash();
      try {
        const response = await requestPost(
          url.resolve(
            bundleSizeAppBaseUrl,
            path.join('commit', commitHash, 'skip')
          )
        );
        if (response.statusCode < 200 || response.statusCode >= 300) {
          throw new Error(
            `${response.statusCode} ${response.statusMessage}: ` + response.body
          );
        }
      } catch (error) {
        log(red('Could not report a skipped pull request'));
        log(red(error));
        process.exitCode = 1;
        return;
      }
    } else {
      log(yellow('Pull requests can be marked as skipped only during CI builds'));
    }
  }
  
  /**
   * Report the size to the bundle-size GitHub App, to determine size changes.
   */
  async function reportBundleSize() {
    if (isPullRequestBuild()) {
      const baseSha = gitCiMasterBaseline();
      const commitHash = gitCommitHash();
      try {
        const response = await requestPost({
          uri: url.resolve(
            bundleSizeAppBaseUrl,
            path.join('commit', commitHash, 'report')
          ),
          json: true,
          body: {
            baseSha,
            bundleSizes: await getBrotliBundleSizes(),
          },
        });
        if (response.statusCode < 200 || response.statusCode >= 300) {
          throw new Error(
            `${response.statusCode} ${response.statusMessage}: ` + response.body
          );
        }
      } catch (error) {
        log(red('Could not report the bundle size of this pull request'));
        log(red(error));
        process.exitCode = 1;
        return;
      }
    } else {
      log(
        yellow(
          'Bundle sizes from pull requests can be reported only during CI builds'
        )
      );
    }
  }
  
  async function getLocalBundleSize() {
    if (globby.sync(fileGlobs).length === 0) {
      log('Could not find runtime files.');
      log('Run', cyan('gulp dist --noextensions'), 'and re-run this task.');
      process.exitCode = 1;
      return;
    } else {
      log(
        'Computing bundle size for version',
        cyan(internalRuntimeVersion),
        'at commit',
        cyan(shortSha(gitCommitHash())) + '.'
      );
    }
    await getBrotliBundleSizes();
  }
  
  async function bundleSize() {
    if (argv.on_skipped_build) {
      return skipBundleSize();
    } else if (argv.on_push_build) {
      return storeBundleSize();
    } else if (argv.on_pr_build) {
      return reportBundleSize();
    } else if (argv.on_local_build) {
      return getLocalBundleSize();
    } else {
      log(red('Called'), cyan('gulp bundle-size'), red('with no task.'));
      process.exitCode = 1;
    }
  }
  
  module.exports = {
    bundleSize,
  };
  
  bundleSize.description =
    'Checks if the minified AMP binary has exceeded its size cap';
  bundleSize.flags = {
    'on_push_build':
      '  Store bundle size in AMP build artifacts repo ' +
      '(also implies --on_pr_build)',
    'on_pr_build': '  Report the bundle size of this pull request to GitHub',
    'on_skipped_build':
      "  Set the status of this pull request's bundle " +
      'size check in GitHub to `skipped`',
    'on_local_build': '  Compute the bundle size of the locally built runtime',
  };
  