Simplify setup code for user repositories (#20)

* Simplify user setup by moving checkout and mode detection into action

- Action now handles checkout with fetch-depth: 0 internally
- Auto-detects mode (squash-merge vs conflict-resolved) from event context
- Removes need for users to specify mode or pr-branch inputs
- Simplifies workflow to just trigger + single action call
- E2e tests now copy workflow from repo and sed the action reference
- E2e tests verify repo is clean and commit exists on origin before running

* Fix e2e tests to use remote action at current SHA instead of local copy

* Fix e2e test job detection and bash glob pattern for label matching

* Skip checkout when no action needed to avoid wasteful git operations

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: Phlogistique

.github/workflows/update-pr-stack.yml

@@ -7,35 +7,11 @@ on:
 permissions:
   contents: write
   pull-requests: write
-  repository-projects: read # See https://github.com/cli/cli/discussions/5307
 
 jobs:
   update-pr-stack:
-    if: github.event.action == 'closed' && github.event.pull_request.merged == true && github.event.pull_request.merge_commit_sha != ''
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-
-      - name: Update PR stack
-        uses: ./
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-
-  continue-after-conflict-resolution:
-    if: github.event.action == 'synchronize' && contains(github.event.pull_request.labels.*.name, 'autorestack-needs-conflict-resolution')
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-
-      - name: Continue PR stack update after conflict resolution
-        uses: ./
+      - uses: Phlogistique/autorestack-action@main
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          mode: conflict-resolved
-          pr-branch: ${{ github.event.pull_request.head.ref }}

action.yml

@@ -7,32 +7,52 @@ inputs:
     description: 'GitHub token for API access'
     required: true
     default: ${{ github.token }}
-  mode:
-    description: 'Action mode: squash-merge (after PR merge) or conflict-resolved (after manual resolution)'
-    required: false
-    default: 'squash-merge'
-  pr-branch:
-    description: 'The PR branch that was pushed (required for conflict-resolved mode)'
-    required: false
-    default: ''
 
 runs:
   using: 'composite'
   steps:
+    - name: Check if action should run
+      id: check
+      shell: bash
+      env:
+        EVENT_ACTION: ${{ github.event.action }}
+        PR_LABELS: ${{ join(github.event.pull_request.labels.*.name, ',') }}
+        PR_MERGED: ${{ github.event.pull_request.merged }}
+        MERGE_COMMIT_SHA: ${{ github.event.pull_request.merge_commit_sha }}
+      run: |
+        if [[ "$EVENT_ACTION" == "closed" && "$PR_MERGED" == "true" && -n "$MERGE_COMMIT_SHA" ]]; then
+          echo "mode=squash-merge" >> $GITHUB_OUTPUT
+        elif [[ "$EVENT_ACTION" == "synchronize" && "$PR_LABELS" == *autorestack-needs-conflict-resolution* ]]; then
+          echo "mode=conflict-resolved" >> $GITHUB_OUTPUT
+        else
+          echo "Event does not match any action trigger (action=$EVENT_ACTION, merged=$PR_MERGED, labels=$PR_LABELS)"
+          echo "mode=skip" >> $GITHUB_OUTPUT
+        fi
+
+    - name: Checkout repository
+      if: steps.check.outputs.mode != 'skip'
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+        token: ${{ inputs.github-token }}
+
     - name: Update PR stack
+      if: steps.check.outputs.mode != 'skip'
       shell: bash
       env:
         GITHUB_TOKEN: ${{ inputs.github-token }}
         GIT_AUTHOR_NAME: github-actions
         GIT_AUTHOR_EMAIL: github-actions@github.com
         GIT_COMMITTER_NAME: github-actions
         GIT_COMMITTER_EMAIL: github-actions@github.com
-        ACTION_MODE: ${{ inputs.mode }}
+        ACTION_MODE: ${{ steps.check.outputs.mode }}
         SQUASH_COMMIT: ${{ github.event.pull_request.merge_commit_sha }}
         MERGED_BRANCH: ${{ github.event.pull_request.head.ref }}
         TARGET_BRANCH: ${{ github.event.pull_request.base.ref }}
-        PR_BRANCH: ${{ inputs.pr-branch }}
-      run: ${{ github.action_path }}/update-pr-stack.sh
+        PR_BRANCH: ${{ github.event.pull_request.head.ref }}
+      run: |
+        echo "Running in $ACTION_MODE mode"
+        ${{ github.action_path }}/update-pr-stack.sh
 
 branding:
   icon: 'git-pull-request'

tests/test_e2e.sh

@@ -210,16 +210,14 @@ wait_for_synchronize_workflow() {
             echo >&2 "Found candidate run IDs: $candidate_run_ids. Checking runs..."
             for run_id in $candidate_run_ids; do
                 echo >&2 "Checking candidate run ID: $run_id"
-                run_info=$(log_cmd gh run view "$run_id" --repo "$REPO_FULL_NAME" --json headBranch,jobs || echo "{}")
+                run_info=$(log_cmd gh run view "$run_id" --repo "$REPO_FULL_NAME" --json headBranch || echo "{}")
 
                 run_head_branch=$(echo "$run_info" | jq -r '.headBranch // ""')
-                # Check if this run has the continue-after-conflict-resolution job
-                has_continue_job=$(echo "$run_info" | jq -r '.jobs[] | select(.name == "continue-after-conflict-resolution") | .name' || echo "")
 
-                echo >&2 "  Run head branch: $run_head_branch, has continue job: $has_continue_job"
+                echo >&2 "  Run head branch: $run_head_branch"
 
-                if [[ "$run_head_branch" == "$branch_name" && -n "$has_continue_job" ]]; then
-                    echo >&2 "Found matching workflow run ID: $run_id (synchronize with continue job)"
+                if [[ "$run_head_branch" == "$branch_name" ]]; then
+                    echo >&2 "Found matching workflow run ID: $run_id (branch matches)"
                     target_run_id="$run_id"
                     break
                 fi
@@ -372,6 +370,34 @@ wait_for_workflow() {
 # --- Test Execution ---
 echo >&2 "--- Starting E2E Test ---"
 
+# 0. Sanity checks - ensure we're testing committed code
+echo >&2 "0. Running sanity checks..."
+
+# Check that the working directory is clean
+if ! git -C "$PROJECT_ROOT" diff --quiet HEAD 2>/dev/null; then
+    echo >&2 "ERROR: Repository has uncommitted changes."
+    echo >&2 "Please commit your changes before running e2e tests."
+    echo >&2 "This ensures we test exactly what will be deployed."
+    git -C "$PROJECT_ROOT" status --short >&2
+    exit 1
+fi
+
+# Get the current commit SHA from the action repo
+ACTION_REPO_COMMIT=$(git -C "$PROJECT_ROOT" rev-parse HEAD)
+echo >&2 "Testing commit: $ACTION_REPO_COMMIT"
+
+# Check that the current commit exists on origin
+if ! git -C "$PROJECT_ROOT" fetch origin --quiet 2>/dev/null; then
+    echo >&2 "WARNING: Could not fetch from origin, skipping remote check"
+elif ! git -C "$PROJECT_ROOT" branch -r --contains "$ACTION_REPO_COMMIT" 2>/dev/null | grep -q .; then
+    echo >&2 "ERROR: Current commit $ACTION_REPO_COMMIT does not exist on origin."
+    echo >&2 "Please push your changes before running e2e tests."
+    echo >&2 "This ensures the workflow can reference the action at this commit."
+    exit 1
+fi
+
+echo >&2 "✅ Sanity checks passed"
+
 # 1. Setup local repository
 echo >&2 "1. Setting up local test repository..."
 TEST_DIR=$(mktemp -d)
@@ -394,65 +420,17 @@ log_cmd git add file.txt
 log_cmd git commit -m "Initial commit"
 INITIAL_COMMIT_SHA=$(git rev-parse HEAD)
 
-# Copy action files
-echo >&2 "Copying action files..."
-cp "$PROJECT_ROOT/action.yml" .
-cp "$PROJECT_ROOT/update-pr-stack.sh" .
-cp "$PROJECT_ROOT/command_utils.sh" .
-
-# Create workflow file pointing to the local action
-echo >&2 "Creating workflow file..."
+# Copy workflow file from the repo and modify it to use the current commit SHA
+# This tests the actual deployed action, not a local copy
+echo >&2 "Copying workflow file from repo..."
 mkdir -p .github/workflows
-cat > .github/workflows/"$WORKFLOW_FILE" <<EOF
-name: Update Stacked PRs on Squash Merge (E2E Test)
-on:
-  pull_request:
-    types: [closed, synchronize]
-permissions:
-  contents: write
-  pull-requests: write
-jobs:
-  update-pr-stack:
-    # Only run on actual squash merges initiated by the test script
-    if: |
-      github.event.action == 'closed' &&
-      github.event.pull_request.merged == true &&
-      github.event.pull_request.merge_commit_sha != ''
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          # Fetch all history for all branches and tags
-          fetch-depth: 0
-          # Use a PAT token for checkout to allow pushing updates
-          token: \${{ secrets.GITHUB_TOKEN }}
-      - name: Update PR stack
-        # Use the action from the current repository checkout
-        uses: ./
-        with:
-          github-token: \${{ secrets.GITHUB_TOKEN }}
-  continue-after-conflict-resolution:
-    # Run when a PR with the conflict label is updated (user pushed conflict resolution)
-    if: |
-      github.event.action == 'synchronize' &&
-      contains(github.event.pull_request.labels.*.name, 'autorestack-needs-conflict-resolution')
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          token: \${{ secrets.GITHUB_TOKEN }}
-      - name: Continue PR stack update after conflict resolution
-        uses: ./
-        with:
-          github-token: \${{ secrets.GITHUB_TOKEN }}
-          mode: conflict-resolved
-          pr-branch: \${{ github.event.pull_request.head.ref }}
-EOF
-
-log_cmd git add action.yml update-pr-stack.sh command_utils.sh .github/workflows/"$WORKFLOW_FILE"
+cp "$PROJECT_ROOT/.github/workflows/$WORKFLOW_FILE" .github/workflows/
+
+# Replace @main with the current commit SHA to test exactly what we pushed
+sed -i "s|uses: Phlogistique/autorestack-action@main|uses: Phlogistique/autorestack-action@$ACTION_REPO_COMMIT|g" .github/workflows/"$WORKFLOW_FILE"
+echo >&2 "Modified workflow to use action at commit $ACTION_REPO_COMMIT"
+
+log_cmd git add .github/workflows/"$WORKFLOW_FILE"
 log_cmd git commit -m "Add action and workflow files"
 ACTION_COMMIT_SHA=$(git rev-parse HEAD)