main() — react Function Reference

Architecture documentation for the main() function in index.js from the react codebase.

Function javascript BabelCompiler Optimization

Entity Profile

BabelCompiler→ Optimization→ main() — react Function Reference

Dependency Diagram

graph TD
  b820a5b1_eaac_bb88_0a69_0d0448036f47["main()"]
  50fe247d_7ce0_aaae_b002_93c23cc44a73["index.js"]
  b820a5b1_eaac_bb88_0a69_0d0448036f47 -->|defined in| 50fe247d_7ce0_aaae_b002_93c23cc44a73
  style b820a5b1_eaac_bb88_0a69_0d0448036f47 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

scripts/tasks/generate-changelog/index.js lines 16–149

async function main() {
  const {packageSpecs, summarizer, debug, format} = parseArgs(
    process.argv.slice(2)
  );
  const log = debug
    ? (...args) => console.log('[generate-changelog]', ...args)
    : noopLogger;

  const allStablePackages = Object.keys(stablePackages);
  const packageTargets = new Map();
  for (let i = 0; i < packageSpecs.length; i++) {
    const spec = packageSpecs[i];
    if (!allStablePackages.includes(spec.name)) {
      throw new Error(
        `Package "${spec.name}" is not listed in stablePackages.`
      );
    }
    if (packageTargets.has(spec.name)) {
      throw new Error(`Package "${spec.name}" was specified more than once.`);
    }
    packageTargets.set(spec.name, spec);
  }

  const targetPackages = packageSpecs.map(spec => spec.name);
  log(
    `Starting changelog generation for: ${packageSpecs
      .map(spec => `${spec.name}@${spec.displayVersion || spec.version}`)
      .join(', ')}`
  );

  const packageInfoMap = new Map();
  const packageInfoResults = await Promise.all(
    targetPackages.map(async pkg => {
      const info = await fetchNpmInfo(pkg, {log});
      return {pkg, info};
    })
  );
  for (let i = 0; i < packageInfoResults.length; i++) {
    const entry = packageInfoResults[i];
    packageInfoMap.set(entry.pkg, entry.info);
  }

  const commitPackagesMap = new Map();
  const commitCollections = await Promise.all(
    targetPackages.map(async pkg => {
      const {gitHead} = packageInfoMap.get(pkg);
      const commits = await collectCommitsSince(pkg, gitHead, {log});
      log(`Package ${pkg} has ${commits.length} commit(s) since ${gitHead}.`);
      return {pkg, commits};
    })
  );
  for (let i = 0; i < commitCollections.length; i++) {
    const entry = commitCollections[i];
    const pkg = entry.pkg;
    const commits = entry.commits;
    for (let j = 0; j < commits.length; j++) {
      const sha = commits[j];
      if (!commitPackagesMap.has(sha)) {
        commitPackagesMap.set(sha, new Set());
      }
      commitPackagesMap.get(sha).add(pkg);
    }
  }
  log(`Found ${commitPackagesMap.size} commits touching target packages.`);

  if (commitPackagesMap.size === 0) {
    console.log('No commits found for the selected packages.');
    return;
  }

  const commitDetails = await Promise.all(
    Array.from(commitPackagesMap.entries()).map(
      async ([sha, packagesTouched]) => {
        const detail = await loadCommitDetails(sha, {log});
        detail.packages = packagesTouched;
        detail.prNumber = extractPrNumber(detail.subject, detail.body);
        return detail;
      }
    )
  );