chore: add fast-forward workflows (#49)

* chore: add fast-forward workflows

* chore: fast forward actions v2

* feat: change label name

* lint

Author: bearmigiano

.github/workflows/check-fast-forward.yml

@@ -0,0 +1,43 @@
+# Fast Forward Check Workflow
+# This workflow validates pull requests with the 'fast-forward' label to ensure they follow
+# the correct branch hierarchy before allowing fast-forward merging:
+# - PRs targeting 'bepolia' must come from 'devel' branch
+# - PRs targeting 'main' must come from 'bepolia' branch
+# The workflow runs on PR events and validates branch structure without merging.
+
+name: check-fast-forward
+on:
+  pull_request:
+    types: [opened, edited, labeled, synchronize]
+    branches:
+      - main
+      - bepolia
+jobs:
+  check-fast-forward:
+    runs-on: ubuntu-latest
+
+    if: ${{ contains(github.event.pull_request.labels.*.name, 'fast-forward') }}
+
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+
+    steps:
+      - name: Validate branches
+        run: |
+          echo "GITHUB_BASE_REF: $GITHUB_BASE_REF"
+          echo "GITHUB_HEAD_REF: $GITHUB_HEAD_REF"
+          if [ "$GITHUB_BASE_REF" == "bepolia" ] && [ "$GITHUB_HEAD_REF" != "devel" ]; then
+            echo "Error: When targeting bepolia branch, head branch must be devel"
+            exit 1
+          elif [ "$GITHUB_BASE_REF" == "main" ] && [ "$GITHUB_HEAD_REF" != "bepolia" ]; then
+            echo "Error: When targeting main branch, head branch must be bepolia"
+            exit 1
+          fi
+
+      - name: Fast forwarding
+        uses: sequoia-pgp/fast-forward@v1
+        with:
+          merge: false
+          comment: on-error # always | never | on-error

.github/workflows/fast-forward.yml

@@ -0,0 +1,44 @@
+# Fast Forward Workflow
+# This workflow automatically fast-forwards pull requests with the 'fast-forward' label
+# when they receive an approved review. It ensures proper branch hierarchy:
+# - PRs targeting 'bepolia' must come from 'devel' branch
+# - PRs targeting 'main' must come from 'bepolia' branch
+# The workflow uses sequoia-pgp/fast-forward action to merge changes automatically.
+
+name: execute-fast-forward
+on:
+  pull_request_review:
+    types: [submitted]
+    branches:
+      - main
+      - bepolia
+jobs:
+  execute-fast-forward:
+    runs-on: ubuntu-latest
+
+    if:
+      ${{ contains(github.event.pull_request.labels.*.name, 'fast-forward') && github.event.review.state == 'approved'
+      }}
+
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+
+    steps:
+      - name: Validate branches
+        run: |
+          echo "GITHUB_BASE_REF: ${{ github.event.pull_request.base.ref }}"
+          echo "GITHUB_HEAD_REF: ${{ github.event.pull_request.head.ref }}"
+          if [ ${{ github.event.pull_request.base.ref }} == "bepolia" ] && [ ${{ github.event.pull_request.head.ref }} != "devel" ]; then
+            echo "Error: When targeting bepolia branch, head branch must be devel"
+            exit 1
+          elif [ ${{ github.event.pull_request.base.ref }} == "main" ] && [ ${{ github.event.pull_request.head.ref }} != "bepolia" ]; then
+            echo "Error: When targeting main branch, head branch must be bepolia"
+            exit 1
+          fi
+      - name: Fast forwarding
+        uses: sequoia-pgp/fast-forward@v1
+        with:
+          merge: true
+          comment: on-error # always | never | on-error

.github/workflows/tests-merge.yml

@@ -4,8 +4,8 @@ on:
   push:
     branches:
       - main
-      - devel
       - bepolia
+      - devel
 
 jobs:
   test: