fix: сравнение с origin через merge-base (расхождение веток)

Co-authored-by: Cursor <cursoragent@cursor.com>

src/services/git-deploy.js

@@ -117,17 +117,57 @@ async function gitCmd(args, cwd, { needsWrite = false } = {}) {
   }
 }
 
-/** Сколько коммитов на origin/main без записи в .git (без fetch) */
-async function getCommitsBehind(root) {
+/**
+ * Сравнение с origin/main через ls-remote + merge-base (без fetch, без записи в .git).
+ */
+async function getRemoteSyncStatus(root) {
   const localHead = (await gitCmd(['rev-parse', 'HEAD'], root)).split('\n')[0].trim();
   const remoteOut = await gitCmd(['ls-remote', 'origin', 'refs/heads/main'], root);
   const remoteSha = remoteOut.split(/\s+/)[0]?.trim();
   if (!remoteSha) {
     throw new Error('Не найден refs/heads/main на origin');
   }
-  if (remoteSha === localHead) return 0;
-  const count = await gitCmd(['rev-list', '--count', `${localHead}..${remoteSha}`], root);
-  return parseInt(count, 10) || 0;
+
+  const remoteShort = (
+    await gitCmd(['rev-parse', '--short', remoteSha], root)
+  ).split('\n')[0].trim();
+
+  if (remoteSha === localHead) {
+    return { behind: 0, ahead: 0, diverged: false, remoteShort, remoteSha };
+  }
+
+  let mergeBase;
+  try {
+    mergeBase = (await gitCmd(['merge-base', localHead, remoteSha], root)).split('\n')[0].trim();
+  } catch {
+    throw new Error(
+      'Не удалось сравнить с origin/main (нет общего предка). Выполните на сервере: git fetch && git reset --hard origin/main'
+    );
+  }
+
+  if (!mergeBase) {
+    throw new Error('Нет общего предка с origin/main');
+  }
+
+  let behind = 0;
+  let ahead = 0;
+
+  if (mergeBase !== remoteSha) {
+    const behindStr = await gitCmd(['rev-list', '--count', `${mergeBase}..${remoteSha}`], root);
+    behind = parseInt(behindStr, 10) || 0;
+  }
+  if (mergeBase !== localHead) {
+    const aheadStr = await gitCmd(['rev-list', '--count', `${mergeBase}..${localHead}`], root);
+    ahead = parseInt(aheadStr, 10) || 0;
+  }
+
+  return {
+    behind,
+    ahead,
+    diverged: behind > 0 && ahead > 0,
+    remoteShort,
+    remoteSha,
+  };
 }
 
 async function getGitInfo({ fetchRemote = false } = {}) {
@@ -157,6 +197,9 @@ async function getGitInfo({ fetchRemote = false } = {}) {
     dirty: false,
     dirtyHint: null,
     behind: null,
+    ahead: null,
+    diverged: false,
+    remoteShort: null,
     updateEnabled: isUpdateEnabled(),
     platform: process.platform,
   };
@@ -191,7 +234,11 @@ async function getGitInfo({ fetchRemote = false } = {}) {
 
   if (fetchRemote) {
     try {
-      info.behind = await getCommitsBehind(root);
+      const sync = await getRemoteSyncStatus(root);
+      info.behind = sync.behind;
+      info.ahead = sync.ahead;
+      info.diverged = sync.diverged;
+      info.remoteShort = sync.remoteShort;
     } catch (err) {
       info.fetchError = err.message;
       if (repoOwner) {