ci(yamllint): add YAML linting (reanahub#301)

Author: CameronMcClymont

.github/workflows/ci.yml

@@ -139,6 +139,24 @@ jobs:
           sudo apt-get install shfmt
           ./run-tests.sh --check-shfmt
 
+  lint-yamllint:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Lint YAML files
+        run: |
+          pip install yamllint
+          ./run-tests.sh --check-yamllint
+
   docs-sphinx:
     runs-on: ubuntu-24.04
     steps:
@@ -211,8 +229,7 @@ jobs:
   release-docker:
     runs-on: ubuntu-24.04
     if: >
-      vars.RELEASE_DOCKER == 'true' &&
-      github.event_name == 'push' &&
+      vars.RELEASE_DOCKER == 'true' && github.event_name == 'push' &&
       startsWith(github.ref, 'refs/tags/')
     needs:
       - docs-sphinx

.yamllint.yaml

@@ -0,0 +1,8 @@
+extends: default
+
+rules:
+  comments:
+    min-spaces-from-content: 1
+  document-start: disable
+  line-length: disable
+  truthy: disable

run-tests.sh

@@ -83,6 +83,10 @@ check_jsonlint() {
     find . -name "*.json" -exec jsonlint -q {} \+
 }
 
+check_yamllint() {
+    yamllint .
+}
+
 check_shfmt() {
     shfmt -d .
 }
@@ -99,6 +103,7 @@ check_all() {
     check_dockerfile
     check_docker_build
     check_jsonlint
+    check_yamllint
     check_shfmt
 }
 
@@ -120,6 +125,7 @@ case $arg in
 --check-dockerfile) check_dockerfile ;;
 --check-docker-build) check_docker_build ;;
 --check-jsonlint) check_jsonlint ;;
+--check-yamllint) check_yamllint ;;
 --check-shfmt) check_shfmt ;;
 --check-all) check_all ;;
 *) echo "[ERROR] Invalid argument '$arg'. Exiting." && exit 1 ;;