ci: add workflow to validate commit names

Author: jesmrec

.github/workflows/conventional-commits.yml

@@ -0,0 +1,67 @@
+name: Conventional Commits
+
+on:
+  pull_request:
+    # Just some events that could involve commit messages
+    types: [opened, synchronize, reopened]
+
+jobs:
+  validate-commit-names:
+    name: Check Commit Names
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout the repository
+      - name: Checkout repository
+        uses: actions/checkout@v5
+        with:
+          # Fetch full history so we can access all commits in the PR
+          fetch-depth: 0
+
+      # Validate commit messages
+      - name: Validate all commit messages
+        run: |
+          echo "Validating all commit names in PR #${{ github.event.pull_request.number }}"
+
+          # Get the base branch and the PR branch
+          BASE_BRANCH="${{ github.event.pull_request.base.ref }}"
+          HEAD_BRANCH="${{ github.event.pull_request.head.ref }}"
+
+          # Fetch the base branch so we can compare commits
+          git fetch origin $BASE_BRANCH
+
+          # Get all commits in the PR (not the base branch ones)
+          # --pretty=format:"%s" gets only the commit message
+          commits=$(git log origin/$BASE_BRANCH..$HEAD_BRANCH --pretty=format:"%s")
+
+          #List of commit messages to validate
+          echo "$commits"
+
+          # Regex pattern for valid Conventional Commit prefixes with a mandatory space
+          regex='^(docs: |fix: |feat: |chore: |refactor: |test: |style: |build: |ci: ).+'
+
+          # Variable to count errors
+          fail=0
+
+          # 'IFS=' disables splitting of the line into words
+          # '-r'  disables interpreting backslashes as escape characters (keeps \ literally)
+          while IFS= read -r commitmsg; do
+            # Skip merge and tx commits
+            if [[ "$commitmsg" =~ ^Merge\ pull\ request || "$commitmsg" =~ ^\[tx\] ]]; then
+              echo "Ignoring merge commit: $commitmsg"
+              continue
+            fi
+
+            # Check if the commit message matches the regex
+            if ! [[ "$commitmsg" =~ $regex ]]; then
+              echo "Invalid commit: $commitmsg"
+              fail=$((fail+1))
+            fi
+          done <<< "$commits"
+
+          # Fail the job if there are any invalid commits
+          if [[ $fail -gt 0 ]]; then
+            echo "$fail commit(s) do not follow the Conventional Commits convention"
+            exit 1
+          else
+            echo "✅ All commits follow the Conventional Commits convention"