test: share bare repository across print workflows

.gitea/workflows/prepare.yml

@@ -6,46 +6,97 @@ on:
       - main
   workflow_dispatch:
 
+concurrency:
+  group: prepare-${{ github.repository }}
+  cancel-in-progress: false
+
+env:
+  WORKSPACE_ROOT: "/data/workspace"
+
 jobs:
   prepare:
     runs-on: standard-ubuntu-22
     steps:
-      - name: 准备复用仓库（强制全量拉取 + 丢弃本地改动）
+      - name: 准备共享仓库和持久 Worktree
         run: |
-          set -e
-          REPO_DIR=/tmp/reused-repo
+          set -euo pipefail
+
+          REPO_NAME="${{ github.event.repository.name }}"
           REPO_URL="${{ github.server_url }}/${{ github.repository }}.git"
-          BRANCH="${{ github.ref_name }}"
+          HEAD_SHA="${{ github.sha }}"
+          REPOSITORY_DIR="${WORKSPACE_ROOT}/${REPO_NAME}/repository.git"
+          WORKTREE_ROOT="${WORKSPACE_ROOT}/${REPO_NAME}/worktrees"
 
-          echo "===== [$(date '+%F %T')] 开始准备仓库 ====="
-          echo "复用目录: $REPO_DIR"
+          case "$HEAD_SHA" in
+            ''|*[!0-9a-fA-F]*)
+              echo "无效的触发提交 SHA: $HEAD_SHA" >&2
+              exit 1
+              ;;
+          esac
+
+          echo "===== [$(date '+%F %T')] 开始准备共享仓库 ====="
+          echo "共享仓库: $REPOSITORY_DIR"
+          echo "Worktree 根目录: $WORKTREE_ROOT"
           echo "仓库地址: $REPO_URL"
-          echo "目标分支: $BRANCH"
+          echo "触发提交: $HEAD_SHA"
 
-          if [ ! -d "$REPO_DIR/.git" ]; then
-            echo "首次使用，克隆仓库..."
-            git clone "$REPO_URL" "$REPO_DIR"
+          mkdir -p "$(dirname "$REPOSITORY_DIR")" "$WORKTREE_ROOT"
+
+          if [ ! -d "$REPOSITORY_DIR" ]; then
+            echo "首次使用，初始化 bare 仓库..."
+            git init --bare "$REPOSITORY_DIR"
+          elif [ "$(git --git-dir="$REPOSITORY_DIR" rev-parse --is-bare-repository)" != "true" ]; then
+            echo "共享仓库目录不是 bare 仓库: $REPOSITORY_DIR" >&2
+            exit 1
           fi
 
-          cd "$REPO_DIR"
+          if git --git-dir="$REPOSITORY_DIR" remote get-url origin >/dev/null 2>&1; then
+            git --git-dir="$REPOSITORY_DIR" remote set-url origin "$REPO_URL"
+          else
+            git --git-dir="$REPOSITORY_DIR" remote add origin "$REPO_URL"
+          fi
 
-          echo "----- 丢弃本地所有更改 -----"
-          git reset --hard
-          git clean -fdx
+          echo "----- 从远端集中 fetch 一次 -----"
+          git --git-dir="$REPOSITORY_DIR" fetch \
+            --prune --prune-tags --tags --force origin \
+            '+refs/heads/*:refs/remotes/origin/*'
 
-          echo "----- 强制拉取最新（含 tag，删除已消失的远端 ref）-----"
-          git remote set-url origin "$REPO_URL"
-          git fetch origin --prune --prune-tags --tags --force
+          if ! git --git-dir="$REPOSITORY_DIR" cat-file -e "${HEAD_SHA}^{commit}"; then
+            echo "共享仓库中不存在触发提交: $HEAD_SHA" >&2
+            exit 1
+          fi
 
-          echo "----- 强制对齐到远端分支 -----"
-          git checkout -B "$BRANCH" "origin/$BRANCH"
-          git reset --hard "origin/$BRANCH"
-          git clean -fdx
+          ensure_worktree() {
+            role=$1
+            worktree_dir="${WORKTREE_ROOT}/${role}"
 
-          echo "----- 当前状态 -----"
-          git log -1 --oneline
-          echo "本地 tags:"
-          git tag
+            if [ -e "$worktree_dir" ]; then
+              if [ ! -f "$worktree_dir/.git" ]; then
+                echo "Worktree 路径已存在但不是 linked worktree: $worktree_dir" >&2
+                return 1
+              fi
+
+              common_dir=$(git -C "$worktree_dir" rev-parse --path-format=absolute --git-common-dir)
+              if [ "$common_dir" != "$(realpath "$REPOSITORY_DIR")" ]; then
+                echo "Worktree 不属于共享仓库: $worktree_dir" >&2
+                return 1
+              fi
+
+              echo "复用持久 Worktree: $worktree_dir"
+              return 0
+            fi
+
+            echo "首次创建持久 Worktree: $worktree_dir"
+            git --git-dir="$REPOSITORY_DIR" worktree add --detach "$worktree_dir" "$HEAD_SHA"
+          }
+
+          ensure_worktree "print1"
+          ensure_worktree "print2"
+
+          echo "----- 当前共享仓库状态 -----"
+          git --git-dir="$REPOSITORY_DIR" log -1 --oneline "$HEAD_SHA"
+          git --git-dir="$REPOSITORY_DIR" worktree list
+          echo "===== Prepare 完成 ====="
 
       - name: 模拟准备耗时
         run: |