houseplan-card/scripts/validate-commit-provenance.mjs

#!/usr/bin/env node
import { execFileSync } from 'node:child_process';
import { basename } from 'node:path';
import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { bundleCommitErrors } from './bundle-policy.mjs';
import { classify } from './change-classes.mjs';

const TRAILER = /^([A-Za-z][A-Za-z0-9-]*):\s*(.*?)\s*$/;
export const ENFORCEMENT_BOUNDARY = '8e2973fa7a7cb1a80204ff95ecf3f2d7c36ed2ce';

// Immutable history can only be repaired with an equally immutable, exact-SHA
// audit record. This beta candidate changed one version-bearing golden frame
// before the golden trailer check reached main. The following dev commit was
// fully validated on Linux with that exact baseline tree, including a green
// golden job. Keep the exception commit-exact so no later omission is hidden.
export const REVIEWED_GOLDEN_PROVENANCE_EXCEPTIONS = new Map([
  [
    'd4dd027b0a27c3c290195cb0e504b1a44c4c2611',
    'https://github.com/Matysh/houseplan-card/actions/runs/33760450815',
  ],
]);

const GOLDEN_PROVENANCE_ERRORS = new Set([
  'golden baseline commit requires one Release trailer',
  'golden baseline commit requires one Baseline-Reviewed trailer',
  'golden baseline commit requires one Baseline-Reviewed or Baseline-Reviewed-Local trailer',
]);
const LOCAL_BASELINE = /^sha256:([0-9a-f]{64})$/;
const BASELINE_INDEX = 'demo/golden/baselines/baselines-index.json';

/** Git invokes commit-msg before it removes the editor template. Ignore the
 * standard comment/scissors suffix exactly as Git will when it records the
 * commit, while leaving ordinary prose after trailers invalid. */
export function cleanedCommitMessage(message) {
  const lines = String(message).replace(/\r/g, '').split('\n');
  const scissors = lines.findIndex((line) => /^\s*#\s*-+\s*>8\s*-+\s*$/.test(line));
  const visible = scissors >= 0 ? lines.slice(0, scissors) : lines;
  return visible.filter((line) => !/^\s*#/.test(line)).join('\n');
}

export function terminalTrailers(message) {
  const lines = cleanedCommitMessage(message).split('\n');
  while (lines.length && !lines.at(-1).trim()) lines.pop();
  const out = new Map();
  for (let index = lines.length - 1; index >= 0; index--) {
    const match = lines[index].match(TRAILER);
    if (!match) break;
    const values = out.get(match[1]) || [];
    values.unshift(match[2]);
    out.set(match[1], values);
  }
  return out;
}

/**
 * #701 (PROCESS.md §3 п.10): документационный коммит — только файлы класса C —
 * трейлеров не требует, как `skip issue` у CPython. Правило №1 охраняет
 * продуктовый код, а не опечатку в гайде. Пустой список файлов (сообщение без
 * `--staged`) — не документационный коммит: судить нечем, правило прежнее.
 * Трейлеры, если они есть, судятся всегда.
 */
export function isDocsOnlyCommit(changedFiles = []) {
  return changedFiles.length > 0 && changedFiles.every((file) => classify(file.replaceAll('\\', '/')) === 'C');
}

export function validateCommitMessage(message, changedFiles = [], { baselineIndex = undefined, authorDate = null } = {}) {
  const trailers = terminalTrailers(message);
  const errors = [];
  const issues = trailers.get('Issue') || [];
  const visible = trailers.get('User-Visible') || [];
  const exempt = isDocsOnlyCommit(changedFiles) && !issues.length && !visible.length;
  if (!exempt && (!issues.length || issues.some((value) => !/^#[1-9][0-9]*$/.test(value)))) {
    errors.push("missing or invalid terminal 'Issue: #<positive number>' trailer");
  }
  if (!exempt && (visible.length !== 1 || !/^(yes|no)$/.test(visible[0]))) {
    errors.push("expected exactly one terminal 'User-Visible: yes|no' trailer");
  }
  const normalizedFiles = changedFiles.map((file) => file.replaceAll('\\', '/'));
  if (visible.length === 1 && visible[0] === 'yes') {
    for (const changelog of ['docs/CHANGELOG.md', 'docs/CHANGELOG.ru.md']) {
      if (!normalizedFiles.includes(changelog)) {
        errors.push(`user-visible commit must update ${changelog}`);
      }
    }
  }
  // #657: бандл меняет только релизный кандидат. В хуке даты нет — судится
  // всегда; в истории коммиты раньше BUNDLE_RELEASE_ONLY_SINCE не судятся.
  errors.push(...bundleCommitErrors(message, normalizedFiles, { authorDate }));
  const changesGolden = changedFiles.some((file) =>
    /^demo\/golden\/baselines\/.*\.(png|json)$/.test(file.replaceAll('\\', '/')));
  if (changesGolden) {
    const release = trailers.get('Release') || [];
    const reviewed = trailers.get('Baseline-Reviewed') || [];
    const reviewedLocal = trailers.get('Baseline-Reviewed-Local') || [];
    if (release.length !== 1 || !release[0]) errors.push('golden baseline commit requires one Release trailer');
    const sources = Number(reviewed.length === 1 && !!reviewed[0])
      + Number(reviewedLocal.length === 1 && !!reviewedLocal[0]);
    if (sources !== 1 || reviewed.length > 1 || reviewedLocal.length > 1) {
      errors.push('golden baseline commit requires one Baseline-Reviewed or Baseline-Reviewed-Local trailer');
    }
    if (reviewedLocal.length === 1) {
      const digest = reviewedLocal[0].match(LOCAL_BASELINE)?.[1] || null;
      if (!digest) {
        errors.push("Baseline-Reviewed-Local must be 'sha256:<64 lowercase hex>'");
      } else if (baselineIndex !== undefined) {
        try {
          const index = typeof baselineIndex === 'string' ? JSON.parse(baselineIndex) : baselineIndex;
          if (index?.localAttestation?.sha256 !== digest) {
            errors.push('Baseline-Reviewed-Local does not match baselines-index.json localAttestation.sha256');
          }
        } catch {
          errors.push('Baseline-Reviewed-Local requires a readable baselines-index.json');
        }
      }
    }
  }
  return errors;
}

export function validateHistoricalCommit(commit, message, changedFiles = [], options = {}) {
  const errors = validateCommitMessage(message, changedFiles, options);
  if (!REVIEWED_GOLDEN_PROVENANCE_EXCEPTIONS.has(commit)) return errors;
  return errors.filter((error) => !GOLDEN_PROVENANCE_ERRORS.has(error));
}

function git(args) {
  return execFileSync('git', args, { encoding: 'utf8' }).trim();
}

export function assertHookMode(row = git(['ls-files', '-s', '.githooks/commit-msg'])) {
  if (!row.startsWith('100755 ')) {
    throw new Error('.githooks/commit-msg must be tracked as executable (100755)');
  }
}

function gitObjectExists(revision, runner = git) {
  try { runner(['cat-file', '-e', `${revision}^{commit}`]); return true; }
  catch { return false; }
}

export function resolveValidationRange({
  eventName, beforeSha, baseSha, headSha, developmentBranch = 'dev',
}, runner = git) {
  if (!headSha) throw new Error('HEAD_SHA is required');
  if (eventName === 'pull_request') {
    if (!baseSha) throw new Error('BASE_SHA is required for a pull request');
    return `${runner(['merge-base', baseSha, headSha])}..${headSha}`;
  }
  const hasBefore = !!beforeSha && !/^0+$/.test(beforeSha)
    && gitObjectExists(beforeSha, runner);
  const comparison = hasBefore
    ? beforeSha
    // A first push has an all-zero `before`. Issue branches are cut from the
    // integration branch, not GitHub's default branch (`main`), so comparing
    // with main would pull already-landed dev commits into the validation
    // range and judge unrelated/closed issues again (#165).
    : `refs/remotes/origin/${developmentBranch || 'dev'}`;
  return `${runner(['merge-base', comparison, headSha])}..${headSha}`;
}

function assertDescendsFromBoundary(commit) {
  try { git(['merge-base', '--is-ancestor', ENFORCEMENT_BOUNDARY, commit]); }
  catch {
    throw new Error(
      `${commit} does not descend from provenance boundary ${ENFORCEMENT_BOUNDARY}`,
    );
  }
}

function validateOne(label, message, files, options = {}) {
  const errors = validateCommitMessage(message, files, options);
  if (errors.length) throw new Error(`${label}:\n- ${errors.join('\n- ')}`);
}

function main(argv) {
  if (argv.includes('--check-hook-mode')) assertHookMode();
  const fileAt = argv.indexOf('--message-file');
  if (fileAt >= 0) {
    const messageFile = argv[fileAt + 1];
    if (!messageFile) throw new Error('--message-file requires a path');
    if (basename(messageFile) === 'MERGE_MSG') return;
    const files = argv.includes('--staged')
      ? git(['diff', '--cached', '--name-only', '--diff-filter=ACMR']).split('\n').filter(Boolean)
      : [];
    let baselineIndex;
    if (files.some((file) => /^demo\/golden\/baselines\/.*\.(png|json)$/.test(file))) {
      try { baselineIndex = git(['show', `:${BASELINE_INDEX}`]); } catch { baselineIndex = null; }
    }
    validateOne('commit message', readFileSync(messageFile, 'utf8'), files, { baselineIndex });
  }
  const rangeAt = argv.indexOf('--range');
  const githubRange = argv.includes('--github-range');
  if (rangeAt >= 0 || githubRange) {
    const range = githubRange
      ? resolveValidationRange({
          eventName: process.env.EVENT_NAME,
          beforeSha: process.env.BEFORE_SHA,
          baseSha: process.env.BASE_SHA,
          headSha: process.env.HEAD_SHA,
          developmentBranch: process.env.DEVELOPMENT_BRANCH,
        })
      : argv[rangeAt + 1];
    if (!range) throw new Error('--range requires a git revision range');
    const head = range.split('..').at(-1);
    assertDescendsFromBoundary(head);
    const commits = git(['rev-list', '--reverse', range]).split('\n').filter(Boolean);
    for (const commit of commits) {
      // The immutable introducing commit is the boundary. File presence is
      // intentionally irrelevant: deleting the validator inside the range
      // must not create a two-commit bypass.
      try { git(['merge-base', '--is-ancestor', ENFORCEMENT_BOUNDARY, commit]); }
      catch { continue; }
      const parentCount = Number(git(['rev-list', '--parents', '-n', '1', commit]).split(/\s+/).length) - 1;
      if (parentCount > 1) continue;
      const message = git(['show', '-s', '--format=%B', commit]);
      const authorDate = git(['show', '-s', '--format=%aI', commit]);
      const files = git(['diff-tree', '--root', '--no-commit-id', '--name-only', '-r', commit])
        .split('\n').filter(Boolean);
      let baselineIndex;
      if (files.some((file) => /^demo\/golden\/baselines\/.*\.(png|json)$/.test(file))) {
        try { baselineIndex = git(['show', `${commit}:${BASELINE_INDEX}`]); } catch { baselineIndex = null; }
      }
      const errors = validateHistoricalCommit(commit, message, files, { baselineIndex, authorDate });
      if (errors.length) throw new Error(`${commit}:\n- ${errors.join('\n- ')}`);
    }
  }
}

if (process.argv[1] && fileURLToPath(import.meta.url) === process.argv[1]) {
  try { main(process.argv.slice(2)); }
  catch (error) {
    console.error(`House Plan provenance: ${error.message}`);
    process.exitCode = 1;
  }
}