Add Github action that verify commit message prefix

If the PR is related to some role, it would verify if in the title or
commit message header there is prefix set.
For example, if change was done for roles/cifmw_helpers, it should
verify if the title or commit message header contains [cifmw_helpers].

Co-Authored-By: Szymon Datko <[email protected]>
Signed-off-by: Daniel Pawlik <[email protected]>

Author: danpawlik

.github/workflows/verify-pr-prefix.yml

@@ -0,0 +1,38 @@
+name: Check if commit message contains role prefix
+
+on:
+  pull_request:
+    types: [opened, synchronize, edited, reopened]
+
+jobs:
+  verify-prefix:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+
+    permissions:
+      contents: write
+      pull-requests: write
+      repository-projects: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Run commit message check
+        id: prefixcheck
+        run: |
+          set +e
+          ./scripts/check-role-prefix.sh > result.log 2>&1
+          EXIT_CODE=$?
+          echo "exit_code=$EXIT_CODE" >> $GITHUB_OUTPUT
+          cat result.log
+
+      - name: Comment on PR if prefix check failed
+        if: steps.prefixcheck.outputs.exit_code != '0'
+        uses: peter-evans/create-or-update-comment@v5
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body-path: ./result.log
+          reactions: confused

scripts/check-role-prefix.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Get the latest commit message file
+TMP_MSG_FILE=$(mktemp)
+git log -1 --pretty=format:"%s%n%n%b" >"$TMP_MSG_FILE"
+
+echo "Checking latest commit message:"
+cat "$TMP_MSG_FILE"
+
+if [ -n "$GITHUB_BASE_REF" ]; then
+    CHANGED_ROLES=$(git diff "origin/${GITHUB_BASE_REF}" --name-only || true)
+else
+    CHANGED_ROLES=$(git diff --cached --name-only || true)
+fi
+
+CHANGED_ROLES=$(echo "$CHANGED_ROLES" | grep '^roles/' | cut -d'/' -f2 | sort -u | xargs | sed 's/ /|/g')
+if [ -z "$CHANGED_ROLES" ]; then
+    echo "No roles modified - skipping check..."
+    exit 0
+fi
+
+echo -e "\n\nDetected changes in roles: **$CHANGED_ROLES**"
+MSG=$(head -n 1 "$TMP_MSG_FILE")
+ROLE_COUNT=$(echo "$CHANGED_ROLES" | tr '|' '\n' | wc -l)
+
+if [ "$ROLE_COUNT" -eq 1 ]; then
+    PATTERN="^[\[(]$CHANGED_ROLES[\])]"
+else
+    PATTERN="^[\[(](multiple)[\])]"
+fi
+
+if ! grep -qE "$PATTERN" <<<"$MSG"; then
+    echo -e "\n**ERROR: Commit message must start with:**\n"
+    if [ "$ROLE_COUNT" -eq 1 ]; then echo -e "\t[$CHANGED_ROLES]\n"; fi
+    if [ "$ROLE_COUNT" -gt 1 ]; then echo -e "\t(multiple)\n\n"; fi
+    echo -e "Example commit header:\n"
+    echo -e "\t-[reproducer] fix task something\n"
+    echo -e "\t-(cifmw_helpers) improve code\n"
+    echo -e "\t-[multiple] updated default value"
+    exit 1
+fi
+
+echo "Commit message prefix is valid."