chore: setup commitlint and git hooks

.gitea/workflows/commit-conventional.yml

@@ -29,22 +29,32 @@ jobs:
           EVENT_NAME: ${{ github.event_name }}
           BEFORE_SHA: ${{ github.event.before }}
           PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
           HEAD_SHA: ${{ github.sha }}
         run: |
           set -euo pipefail
 
           BASE_SHA=""
+          TARGET_SHA="${HEAD_SHA}"
 
-          if [ "${EVENT_NAME}" = "pull_request" ] && [ -n "${PR_BASE_SHA:-}" ]; then
+          if [ "${EVENT_NAME}" = "pull_request" ] && [ -n "${PR_HEAD_SHA:-}" ]; then
+            TARGET_SHA="${PR_HEAD_SHA}"
+          fi
+
+          if [ "${EVENT_NAME}" = "pull_request" ] && [ -n "${PR_BASE_SHA:-}" ] && [ -n "${TARGET_SHA:-}" ]; then
+            BASE_SHA="$(git merge-base "${PR_BASE_SHA}" "${TARGET_SHA}" || true)"
+
+            if [ -z "${BASE_SHA}" ]; then
               BASE_SHA="${PR_BASE_SHA}"
+            fi
           elif [ -n "${BEFORE_SHA:-}" ] && [ "${BEFORE_SHA}" != "0000000000000000000000000000000000000000" ]; then
             BASE_SHA="${BEFORE_SHA}"
-          elif git rev-parse "${HEAD_SHA}^" >/dev/null 2>&1; then
-            BASE_SHA="$(git rev-parse "${HEAD_SHA}^")"
+          elif git rev-parse "${TARGET_SHA}^" >/dev/null 2>&1; then
+            BASE_SHA="$(git rev-parse "${TARGET_SHA}^")"
           fi
 
-          if [ -n "${BASE_SHA}" ] && [ "${BASE_SHA}" != "${HEAD_SHA}" ]; then
-            npx --no -- commitlint --from "${BASE_SHA}" --to "${HEAD_SHA}" --verbose
+          if [ -n "${BASE_SHA}" ] && [ "${BASE_SHA}" != "${TARGET_SHA}" ]; then
+            npx --no -- commitlint --from "${BASE_SHA}" --to "${TARGET_SHA}" --verbose
           else
-            git log -1 --format=%s "${HEAD_SHA}" | npx --no -- commitlint --verbose
+            git log -1 --format=%s "${TARGET_SHA}" | npx --no -- commitlint --verbose
           fi