Function printChangeSummary

build-system/pr-check/utils.js:34–86

* Prints a summary of files changed by, and commits included in the PR.

()

 * Prints a summary of files changed by, and commits included in the PR.
 */
function printChangeSummary() {
  const loggingPrefix = getLoggingPrefix();
  let commitSha;

  if (isCiBuild()) {
    logWithoutTimestamp(
      `${loggingPrefix} Latest commit from ${cyan('main')} included ` +
        `in this build: ${cyan(shortSha(gitCiMainBaseline()))}`
    );
    commitSha = ciPullRequestSha();
  } else {
    commitSha = gitCommitHash();
  }
  logWithoutTimestamp(
    `${loggingPrefix} Testing the following changes at commit ` +
      `${cyan(shortSha(commitSha))}`
  );

  const filesChanged = gitDiffStatMain();
  logWithoutTimestamp(filesChanged);

  const branchCreationPoint = gitBranchCreationPoint();
  if (branchCreationPoint) {
    logWithoutTimestamp(
      `${loggingPrefix} Commit log since branch`,
      `${cyan(gitBranchName())} was forked from`,
      `${cyan('main')} at`,
      `${cyan(shortSha(branchCreationPoint))}:`
    );
    logWithoutTimestamp(gitDiffCommitLog() + '\n');
  } else {
    logWithoutTimestamp(
      loggingPrefix,
      yellow('WARNING:'),
      'Could not find a common ancestor for',
      cyan(gitBranchName()),
      'and',
      cyan('main') + '. (This can happen with older PR branches.)'
    );
    logWithoutTimestamp(
      loggingPrefix,
      yellow('NOTE 1:'),
      'If this causes unexpected test failures, try rebasing the PR branch on',
      cyan('main') + '.'
    );
    logWithoutTimestamp(
      loggingPrefix,
      yellow('NOTE 2:'),
      "If rebasing doesn't work, you may have to recreate the branch. See",
      cyan(GIT_BRANCH_URL) + '.\n'
    );
  }
}

/**
 * Signal to dependent jobs that they should be skipped. Uses an identifier that