Function prepareReportFilesToCompare

packages/ci/src/lib/run-utils.ts:209–259

(
  args: CompareReportsArgs,
)

}

export async function prepareReportFilesToCompare(
  args: CompareReportsArgs,
): Promise<Diff<string>> {
  const { config, project, ctx } = args;
  const {
    outputDir = DEFAULT_PERSIST_OUTPUT_DIR,
    filename = DEFAULT_PERSIST_FILENAME,
  } = config.persist ?? {};
  const label = project?.name;

  const originalReports = await Promise.all(
    [args.currReport, args.prevReport].map(({ files }) =>
      readJsonFile<Report>(files.json),
    ),
  );
  const labeledReports = label
    ? originalReports.map(report => ({ ...report, label }))
    : originalReports;

  const reportPaths = labeledReports.map((report, idx) => {
    const key: keyof Diff<string> = idx === 0 ? 'after' : 'before';
    const filePath = createReportPath({
      outputDir: path.resolve(ctx.directory, outputDir),
      filename,
      format: 'json',
      suffix: key,
    });
    return { key, report, filePath };
  });

  await Promise.all(
    reportPaths.map(({ filePath, report }) =>
      writeFile(filePath, JSON.stringify(report, null, 2)),
    ),
  );

  logDebug(
    [
      'Prepared',
      project && `"${project.name}" project's`,
      'report files for comparison',
      `at ${reportPaths.map(({ filePath }) => filePath).join(' and ')}`,
    ]
      .filter(Boolean)
      .join(' '),
  );

  return objectFromEntries(
    reportPaths.map(({ key, filePath }) => [key, filePath]),
  );
}

export async function saveDiffFiles(
  args: CompareReportsArgs,