From 1c55937a9a31efce11279f5ca56965f890707fdd Mon Sep 17 00:00:00 2001
From: Seven Gao <799889633@qq.com>
Date: Thu, 27 Aug 2026 22:45:44 +0800
Subject: [PATCH] ci: add SHA fallback when mirror checkout fails

The self-hosted runner's local mirror (/opt/ScratchV) may be stale,
causing 'reference is not a tree' errors when checking out GITHUB_SHA.
Add a fallback that fetches the exact SHA from origin and retries
checkout, ensuring CI works even with an outdated mirror.

Signed-off-by: Seven Gao <799889633@qq.com>
---
 .github/workflows/ci.yml | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6859e7a..5d957ca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -58,11 +58,17 @@ jobs:
           echo "Fetching origin main..."
           retry "git fetch origin main" git fetch origin main || exit 1
           echo "Checking out $GITHUB_SHA..."
-          if git -c advice.detachedHead=false checkout -f "$GITHUB_SHA"; then
-            echo "::notice::Checkout successful: $(git log -1 --format='%h %ai %s')"
+          if ! git -c advice.detachedHead=false checkout -f "$GITHUB_SHA"; then
+            echo "::warning::Checkout failed, fetching SHA directly from origin..."
+            git fetch origin "$GITHUB_SHA" || true
+            if git -c advice.detachedHead=false checkout -f "$GITHUB_SHA"; then
+              echo "::notice::Checkout successful after direct fetch: $(git log -1 --format='%h %ai %s')"
+            else
+              echo "::error::GITHUB_SHA ($GITHUB_SHA) not found — checkout failed"
+              exit 1
+            fi
           else
-            echo "::error::GITHUB_SHA ($GITHUB_SHA) not found in local repo — checkout failed"
-            exit 1
+            echo "::notice::Checkout successful: $(git log -1 --format='%h %ai %s')"
           fi
 
       - name: Install dependencies
@@ -152,11 +158,17 @@ jobs:
           echo "Fetching origin main..."
           retry "git fetch origin main" git fetch origin main || exit 1
           echo "Checking out $GITHUB_SHA..."
-          if git -c advice.detachedHead=false checkout -f "$GITHUB_SHA"; then
-            echo "::notice::Checkout successful: $(git log -1 --format='%h %ai %s')"
+          if ! git -c advice.detachedHead=false checkout -f "$GITHUB_SHA"; then
+            echo "::warning::Checkout failed, fetching SHA directly from origin..."
+            git fetch origin "$GITHUB_SHA" || true
+            if git -c advice.detachedHead=false checkout -f "$GITHUB_SHA"; then
+              echo "::notice::Checkout successful after direct fetch: $(git log -1 --format='%h %ai %s')"
+            else
+              echo "::error::GITHUB_SHA ($GITHUB_SHA) not found — checkout failed"
+              exit 1
+            fi
           else
-            echo "::error::GITHUB_SHA ($GITHUB_SHA) not found in local repo — checkout failed"
-            exit 1
+            echo "::notice::Checkout successful: $(git log -1 --format='%h %ai %s')"
           fi
 
       - name: Install dependencies