fix: 改回 git commit/push，強制 Dockerfile rebuild 確保 git binary 存在

app/git.js

@@ -1,25 +1,36 @@
-import fs from 'fs';
+import { spawnSync } from 'child_process';
 import path from 'path';
-import { commitFile } from './gitea.js';
-import { FINDINGS_PATH } from './config.js';
+import { GITEA_SERVER_URL, GITEA_REPOSITORY, GITEA_TOKEN, PR_HEAD_BRANCH, FINDINGS_PATH } from './config.js';
+
+function git(args, cwd) {
+  const result = spawnSync('git', args, { cwd, encoding: 'utf8' });
+  if (result.error) throw result.error;
+  if (result.status !== 0) throw new Error((result.stderr || result.stdout || '').trim());
+  return (result.stdout || '').trim();
+}
 
-/**
- * 透過 Gitea API 將 findings.json push 到來源分支（不需要 git binary）
- */
 export async function commitAndPush(workspace) {
+  const repoDir = path.join(workspace, GITEA_REPOSITORY);
+  const remoteUrl = GITEA_SERVER_URL.replace(/\/$/, '').replace('https://', `https://${GITEA_TOKEN}@`).replace('http://', `http://${GITEA_TOKEN}@`) + `/${GITEA_REPOSITORY}.git`;
+
   try {
-    const fullPath = path.join(workspace, FINDINGS_PATH);
-    const content = fs.readFileSync(fullPath, 'utf8');
-    console.log(`  [debug] FINDINGS_PATH=${FINDINGS_PATH} branch=${process.env.PR_HEAD_BRANCH} token=${process.env.GITEA_TOKEN ? '***' : 'EMPTY'}`);
-    const result = await commitFile(
-      FINDINGS_PATH,
-      content,
-      'chore: update ai-review findings [skip ci]'
-    );
-    const commitHash = result.commit?.sha?.slice(0, 7) || 'unknown';
-    console.log(`  ✅ persisted findings  commit=${commitHash}  push=${process.env.PR_HEAD_BRANCH}`);
+    git(['config', 'user.email', 'ai-review[bot]@gitea'], repoDir);
+    git(['config', 'user.name', 'AI Review Bot'], repoDir);
+    git(['fetch', 'origin', PR_HEAD_BRANCH], repoDir);
+    git(['checkout', PR_HEAD_BRANCH], repoDir);
+    git(['add', FINDINGS_PATH], repoDir);
+
+    const status = git(['status', '--porcelain'], repoDir);
+    if (!status) {
+      console.log('  findings.json 無變更，跳過 commit');
+      return;
+    }
+
+    const out = git(['commit', '-m', 'chore: update ai-review findings [skip ci]'], repoDir);
+    const commitHash = out.match(/\[.+ ([a-f0-9]+)\]/)?.[1] || 'unknown';
+    git(['push', remoteUrl, PR_HEAD_BRANCH], repoDir);
+    console.log(`  ✅ persisted findings  commit=${commitHash}  push=${PR_HEAD_BRANCH}`);
   } catch (e) {
-    const detail = e.response?.data ? JSON.stringify(e.response.data) : e.message;
-    console.log(`  ⚠️  Runner failed: commit/push 失敗: ${e.response?.status || ''} ${detail}`);
+    console.log(`  ⚠️  Runner failed: commit/push 失敗: ${e.message}`);
   }
 }