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].

Also there is a dedicated script: scripts/check-role-prefix.sh
that gives possibility to test the commit message locally.

Signed-off-by: Daniel Pawlik <[email protected]>

Author: danpawlik

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

@@ -0,0 +1,19 @@
+name: Check if commit message contains role prefix
+
+on:
+  pull_request:
+    types: [opened, synchronize, edited, reopened]
+
+jobs:
+  verify-prefix:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Run commit message check
+        run: |
+          ./scripts/check-role-prefix.sh

scripts/check-role-prefix.sh

@@ -0,0 +1,29 @@
+#!/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 "$TMP_MSG_FILE"
+
+CHANGED_ROLES=$(git diff --cached --name-only || true)
+if [ -z "$CHANGED_ROLES" ]; then
+    CHANGED_ROLES=$(git diff HEAD~1 --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 changed roles: $CHANGED_ROLES"
+MSG=$(head -n 1 "$TMP_MSG_FILE")
+if ! grep -qE "^\[($CHANGED_ROLES)\]" <<<"$MSG"; then
+    echo -e "\nERROR: Commit message must start with one of: [$CHANGED_ROLES]\n"
+    echo "Example: [reproducer] fix task or [cifmw_helpers] improve code"
+    exit 1
+fi
+
+echo "Commit message prefix is valid."