Function classifyCommit

src/tools/git/classify-commits.ts:32–93

(c: RawCommit)

const CONV_RE = /^(?<type>[a-z]+)(?:\((?<scope>[^)]+)\))?(?<bang>!)?:\s*(?<desc>.+)$/i;

export function classifyCommit(c: RawCommit): ClassifiedCommit {
  const m = CONV_RE.exec(c.subject.trim());
  const bodyLower = c.body.toLowerCase();
  const hasBreakingTrailer = /\bbreaking[- ]change\b/i.test(c.body);

  if (m?.groups) {
    const type = m.groups.type!.toLowerCase();
    const scope = m.groups.scope;
    const bang = m.groups.bang === '!';
    if (bang || hasBreakingTrailer) {
      return { ...c, category: 'breaking', scope, reason: `conventional ${type}!${scope ? `(${scope})` : ''}` };
    }
    switch (type) {
      case 'feat':
      case 'feature':
        return { ...c, category: 'features', scope, reason: `conventional feat` };
      case 'fix':
      case 'bugfix':
      case 'hotfix':
        return { ...c, category: 'fixes', scope, reason: `conventional fix` };
      case 'perf':
        return { ...c, category: 'perf', scope, reason: `conventional perf` };
      case 'docs':
      case 'doc':
        return { ...c, category: 'docs', scope, reason: `conventional docs` };
      case 'refactor':
      case 'chore':
      case 'test':
      case 'tests':
      case 'ci':
      case 'build':
      case 'style':
        return { ...c, category: 'internal', scope, reason: `conventional ${type}` };
    }
  }

  if (hasBreakingTrailer) {
    return { ...c, category: 'breaking', reason: 'BREAKING CHANGE trailer in body' };
  }

  // Free-form heuristic fallback. Order matters — earlier wins.
  const subj = c.subject.toLowerCase();
  if (/\b(add|new|introduce|implement|support)\b/.test(subj)) {
    return { ...c, category: 'features', reason: 'subject suggests addition' };
  }
  if (/\b(fix|resolve|correct|patch|repair|prevent)\b/.test(subj)) {
    return { ...c, category: 'fixes', reason: 'subject suggests fix' };
  }
  if (/\b(refactor|cleanup|rename|reorganize|move|extract)\b/.test(subj)) {
    return { ...c, category: 'internal', reason: 'subject suggests refactor' };
  }
  if (/\b(doc|docs|readme|comment)\b/.test(subj)) {
    return { ...c, category: 'docs', reason: 'subject suggests docs' };
  }
  if (/\b(perf|performance|optimi[sz]e|speed)\b/.test(subj)) {
    return { ...c, category: 'perf', reason: 'subject suggests perf' };
  }
  if (bodyLower.includes('breaking')) {