text: /**
   * @license
   * Copyright Google LLC All Rights Reserved.
   *
   * Use of this source code is governed by an MIT-style license that can be
   * found in the LICENSE file at https://angular.io/license
   */
  
  'use strict';
  
  // Imports
  const fs = require('fs');
  const path = require('path');
  
  // Get branch and project name from command line arguments.
  const [, , limitFile, project, commit] = process.argv;
  
  // Load sizes.
  const currentSizes = JSON.parse(fs.readFileSync('/tmp/current.log', 'utf8'));
  const allLimitSizes = JSON.parse(fs.readFileSync(limitFile, 'utf8'));
  
  // TODO: Change the `master` golden key to something more obvious, or remove it. The branch
  // name is unreasonable since the limits are always taken from the currently checked-out revision.
  const limitSizes = allLimitSizes[project]['master'];
  
  // Check current sizes against limits.
  let failed = false;
  const successMessages = [];
  const failureMessages = [];
  for (const compressionType in limitSizes) {
    if (typeof limitSizes[compressionType] === 'object') {
      const limitPerFile = limitSizes[compressionType];
  
      for (const filename in limitPerFile) {
        const expectedSize = limitPerFile[filename];
        const actualSize = currentSizes[`${compressionType}/${filename}`];
  
        if (actualSize === undefined) {
          failed = true;
          // An expected compression type/file combination is missing. Maybe the file was renamed or
          // removed. Report it as an error, so the user updates the corresponding limit file.
          console.error(
              `ERROR: Commit ${commit} ${compressionType} ${filename} measurement is missing. ` +
              'Maybe the file was renamed or removed.');
        } else {
          const absoluteSizeDiff = Math.abs(actualSize - expectedSize);
          // If size diff is larger than 1% or 500 bytes...
          if (absoluteSizeDiff > 500 || absoluteSizeDiff > expectedSize / 100) {
            failed = true;
            // We must also catch when the size is significantly lower than the payload limit, so
            // we are forced to update the expected payload number when the payload size reduces.
            // Otherwise, we won't be able to catch future regressions that happen to be below
            // the artificially inflated limit.
            const operator = actualSize > expectedSize ? 'exceeded' : 'fell below';
  
            failureMessages.push(
                `FAIL: Commit ${commit} ${compressionType} ${filename} ${
                    operator} expected size by 500 bytes or >1% ` +
                `(expected: ${expectedSize}, actual: ${actualSize}).`);
          } else {
            successMessages.push(
                `SUCCESS: Commit ${commit} ${compressionType} ${
                    filename} did NOT cross size threshold of 500 bytes or >1% ` +
                `(expected: ${expectedSize}, actual: ${actualSize}).`);
          }
        }
      }
    }
  }
  
  // Group failure messages separately from success messages so they are easier to find.
  successMessages.concat(failureMessages).forEach(message => console.error(message));
  
  if (failed) {
    const projectRoot = path.resolve(__dirname, '../..');
    const limitFileRelPath = path.relative(projectRoot, limitFile);
    console.info(
        `If this is a desired change, please update the size limits in file '${limitFileRelPath}'.`);
    process.exit(1);
  } else {
    console.info(`Payload size check passed. All diffs are less than 1% or 500 bytes.`);
  }
  