207 lines
7.2 KiB
JavaScript
207 lines
7.2 KiB
JavaScript
import { fileURLToPath } from 'node:url';
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import { loadInputs, logInputs } from './lib/inputs.js';
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import { Git } from './lib/git.js';
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import { GiteaClient } from './lib/gitea.js';
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import { OpenCode } from './lib/opencode.js';
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import { log, maskSecrets } from './lib/util.js';
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async function main() {
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const inputs = loadInputs();
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logInputs(inputs);
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const remoteUrl = `${inputs.serverUrl}/${inputs.owner}/${inputs.repo}.git`;
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const git = new Git({ cwd: inputs.workspace, remoteUrl, token: inputs.token });
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const gitea = new GiteaClient({
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serverUrl: inputs.serverUrl,
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owner: inputs.owner,
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repo: inputs.repo,
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token: inputs.token,
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});
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const opencode = new OpenCode({ ...inputs.opencode, language: inputs.language });
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// 1. 準備 git 環境並抓取兩個分支
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log.step('準備 git 環境');
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git.configure();
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git.fetchBranches([inputs.sourceBranch, inputs.targetBranch]);
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// 2. 確認來源分支相對目標分支有變更
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const ahead = git.countAheadCommits(inputs.targetBranch, inputs.sourceBranch);
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if (ahead === 0) {
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log.warn(`來源分支 ${inputs.sourceBranch} 相對 ${inputs.targetBranch} 沒有新的 commit，無需建立 PR`);
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return;
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}
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log.info(`來源分支領先 ${ahead} 個 commit`);
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// 3. 蒐集 diff 內容
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log.step('蒐集 git diff');
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const commitMessages = git.getCommitMessages(inputs.targetBranch, inputs.sourceBranch);
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const diffStat = git.getDiffStat(inputs.targetBranch, inputs.sourceBranch);
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const fullDiff = git.getDiff(inputs.targetBranch, inputs.sourceBranch);
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const { diff, truncated } = truncateDiff(fullDiff, inputs.maxDiffChars);
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if (truncated) log.warn(`diff 過大，已截斷至 ${inputs.maxDiffChars} 字元`);
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// 4. 使用 opencode 產生標題與描述（失敗則 fallback）
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log.step('使用 opencode 產生 PR 標題與描述');
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let summary = await opencode.summarize({
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sourceBranch: inputs.sourceBranch,
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targetBranch: inputs.targetBranch,
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commitMessages,
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diffStat,
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diff,
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});
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if (!summary) {
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log.warn('改用 commit/stat 自動產生標題與描述');
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summary = fallbackSummary({
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source: inputs.sourceBranch,
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target: inputs.targetBranch,
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commitMessages,
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diffStat,
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});
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}
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log.success(`標題: ${summary.title}`);
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// 5. 偵測合併衝突
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log.step('偵測合併衝突');
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const { hasConflict, files } = git.detectConflict(inputs.targetBranch, inputs.sourceBranch);
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if (!hasConflict) {
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// 5a. 無衝突：直接建立 來源 → 目標 的 PR
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log.success('無衝突，建立來源分支 → 目標分支的 PR');
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const { pull, created } = await gitea.createPull({
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head: inputs.sourceBranch,
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base: inputs.targetBranch,
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title: summary.title,
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body: summary.description,
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});
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reportPull(pull, created);
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return;
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}
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// 5b. 有衝突：從目標分支建立解衝突分支，合併來源分支後 PR 回來源分支
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log.warn(`偵測到衝突檔案 (${files.length}): ${files.join(', ')}`);
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const resolveBranch = buildResolveBranchName(inputs.targetBranch, inputs.sourceBranch);
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log.step('建立解衝突分支並合併來源分支');
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const { files: conflictFiles } = git.createResolveBranch({
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target: inputs.targetBranch,
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source: inputs.sourceBranch,
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resolveBranch,
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});
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const body = buildResolveBody({
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source: inputs.sourceBranch,
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target: inputs.targetBranch,
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resolveBranch,
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files: conflictFiles.length ? conflictFiles : files,
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summary,
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});
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log.step('建立解衝突分支 → 來源分支的 PR');
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const { pull, created } = await gitea.createPull({
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head: resolveBranch,
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base: inputs.sourceBranch,
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title: `解衝突: 將 ${inputs.targetBranch} 合併回 ${inputs.sourceBranch}`,
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body,
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});
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reportPull(pull, created);
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}
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/** 把 diff 截斷至上限字元數。 */
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function truncateDiff(diff, maxChars) {
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if (!diff || diff.length <= maxChars) return { diff: diff || '', truncated: false };
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return {
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diff: `${diff.slice(0, maxChars)}\n\n... (diff 已截斷，僅顯示前 ${maxChars} 字元) ...`,
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truncated: true,
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};
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}
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/** opencode 不可用時，用 commit 訊息與 stat 產生簡單摘要。 */
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function fallbackSummary({ source, target, commitMessages, diffStat }) {
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const firstCommit = (commitMessages || '')
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.split('\n')
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.map((l) => l.replace(/^- /, '').trim())
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.find(Boolean);
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const title = firstCommit || `Merge ${source} into ${target}`;
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const description = [
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`## 變更摘要`,
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``,
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`將 \`${source}\` 合併到 \`${target}\`。`,
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``,
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`### Commits`,
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commitMessages || '(無)',
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``,
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`### 變更檔案`,
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'```',
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diffStat || '(無)',
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'```',
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].join('\n');
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return { title, description };
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}
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// 解衝突分支主體最大長度；連同前綴 `resolve-conflict/` 與 runId 後綴，
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// 總長度仍遠低於 Git 對 ref 名稱的限制（約 255）。
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const MAX_BRANCH_STEM_LENGTH = 180;
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/** 解衝突分支名稱。 */
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function buildResolveBranchName(target, source) {
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const runId = process.env.GITHUB_RUN_NUMBER || process.env.GITHUB_RUN_ID || '';
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const safe = (s) => s.replace(/[^a-zA-Z0-9._/-]/g, '-');
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const suffix = runId ? `-${runId}` : '';
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// 截斷主體長度，避免 target/source 過長使分支名稱超出 Git 限制
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const stem = `${safe(target)}-into-${safe(source)}`.slice(0, MAX_BRANCH_STEM_LENGTH);
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return `resolve-conflict/${stem}${suffix}`;
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}
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/** 解衝突 PR 的描述。 */
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function buildResolveBody({ source, target, resolveBranch, files, summary }) {
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return [
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`## ⚠️ 自動解衝突 PR`,
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``,
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`來源分支 \`${source}\` 合併到目標分支 \`${target}\` 時偵測到衝突，`,
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`已自動從 \`${target}\` 建立解衝突分支 \`${resolveBranch}\` 並合併 \`${source}\`。`,
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``,
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`**此 PR 會將 \`${resolveBranch}\` 合併回 \`${source}\`，請在合併前手動解決下列檔案的衝突標記（\`<<<<<<<\`、\`=======\`、\`>>>>>>>\`）：**`,
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``,
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...files.map((f) => `- \`${f}\``),
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``,
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`### ✅ 合併前人工檢查清單`,
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``,
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`- [ ] 已移除所有檔案中的衝突標記（\`<<<<<<<\`、\`=======\`、\`>>>>>>>\`）`,
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`- [ ] 已確認合併結果可正常建置／執行`,
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`- [ ] 已保留雙方必要變更，無誤刪`,
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``,
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`解決並合併此 PR 後，\`${source}\` 即可順利合併進 \`${target}\`。`,
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``,
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`---`,
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``,
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`### AI 變更摘要`,
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``,
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summary.description || '(無)',
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].join('\n');
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}
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/** 印出 PR 結果。 */
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function reportPull(pull, created) {
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const url = pull?.html_url || pull?.url || '';
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const number = pull?.number || '';
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if (created) {
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log.success(`已建立 PR #${number}: ${url}`);
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} else {
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log.info(`PR 已存在 #${number}: ${url}`);
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}
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}
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// 純函式對外匯出，供測試使用（不觸發 main 流程）
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export { truncateDiff, fallbackSummary, buildResolveBranchName, buildResolveBody };
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// 僅在直接以 `node index.js` 執行時才跑主流程；被測試 import 時不執行
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if (process.argv[1] && fileURLToPath(import.meta.url) === process.argv[1]) {
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main().catch((err) => {
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const detail = err?.stack || err?.message || String(err);
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// 錯誤訊息／stack 可能夾帶 token，輸出到 CI 日誌前先遮蔽
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log.error(maskSecrets(detail, [process.env.GITEA_TOKEN]));
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process.exit(1);
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});
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}
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