fix: 改用 Gitea API commit findings.json，不依賴 git binary

app/git.js

@@ -1,37 +1,22 @@
-import { spawnSync } from 'child_process';
-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);
-  return (result.stdout || '').trim();
-}
+import fs from 'fs';
+import path from 'path';
+import { commitFile } from './gitea.js';
+import { FINDINGS_PATH } from './config.js';
 
 /**
- * Commit findings.json 並 push 到 PR 來源分支
+ * 透過 Gitea API 將 findings.json push 到來源分支（不需要 git binary）
  */
-export function commitAndPush(workspace) {
-  const repoDir = `${workspace}/${GITEA_REPOSITORY}`;
-  const remoteUrl = GITEA_SERVER_URL.replace(/\/$/, '').replace('https://', `https://${GITEA_TOKEN}@`) + `/${GITEA_REPOSITORY}.git`;
-
+export async function commitAndPush(workspace) {
   try {
-    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}`);
+    const fullPath = path.join(workspace, FINDINGS_PATH);
+    const content = fs.readFileSync(fullPath, 'utf8');
+    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}`);
   } catch (e) {
     console.log(`  ⚠️  Runner failed: commit/push 失敗: ${e.message}`);
   }

app/gitea.js

@@ -1,6 +1,6 @@
 import axios from 'axios';
 import https from 'https';
-import { GITEA_TOKEN, GITEA_SERVER_URL, GITEA_REPOSITORY, PR_NUMBER } from './config.js';
+import { GITEA_TOKEN, GITEA_SERVER_URL, GITEA_REPOSITORY, PR_NUMBER, PR_HEAD_BRANCH } from './config.js';
 
 const httpsAgent = new https.Agent({ rejectUnauthorized: false });
 const headers = () => ({ Authorization: `token ${GITEA_TOKEN}`, 'Content-Type': 'application/json' });
@@ -15,3 +15,37 @@ export async function postComment(body) {
   const resp = await axios.post(api(`/repos/${GITEA_REPOSITORY}/issues/${PR_NUMBER}/comments`), { body }, { headers: headers(), timeout: 30000, httpsAgent });
   return resp.data;
 }
+
+/**
+ * 透過 Gitea API 建立或更新檔案（不需要 git binary）
+ */
+export async function commitFile(filePath, content, message) {
+  const encoded = Buffer.from(content).toString('base64');
+  const url = api(`/repos/${GITEA_REPOSITORY}/contents/${filePath}`);
+
+  // 先嘗試取得現有檔案的 SHA
+  let sha;
+  try {
+    const existing = await axios.get(`${url}?ref=${PR_HEAD_BRANCH}`, { headers: headers(), httpsAgent, timeout: 15000 });
+    sha = existing.data.sha;
+  } catch {
+    sha = undefined;
+  }
+
+  const payload = {
+    message,
+    content: encoded,
+    branch: PR_HEAD_BRANCH,
+    ...(sha ? { sha } : {}),
+  };
+
+  const resp = await axios.request({
+    method: sha ? 'put' : 'post',
+    url,
+    headers: headers(),
+    httpsAgent,
+    timeout: 30000,
+    data: payload,
+  });
+  return resp.data;
+}