ci(yamllint): add YAML linting (reanahub#838)

Closes reanahub#836

.editorconfig

@@ -0,0 +1,3 @@
+[*.{yaml,yml}]
+indent_size = 2
+indent_style = space

.github/workflows/ci.yml

@@ -175,3 +175,21 @@ jobs:
 
       - name: Run chart-testing (lint)
         run: ct lint --config .github/ct.yaml
+
+  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

.yamllint.yaml

@@ -0,0 +1,9 @@
+extends: default
+
+rules:
+  document-start: disable
+  line-length: disable
+  truthy: disable
+
+ignore:
+  - helm/reana  # is linted by `helm lint` and `ct lint`

MANIFEST.in

@@ -13,6 +13,7 @@ include *.yml
 include .flake8
 include LICENSE
 include pytest.ini
+exclude .editorconfig
 exclude .readthedocs.yaml
 prune docs/_build
 recursive-include reana *.py

helm/configurations/values-dev.yaml

@@ -1,33 +1,33 @@
 # REANA components pointing to `latest`, locally built master branch
 
 components:
-    reana_db:
-      image: docker.io/library/postgres:14.10
-    reana_server:
-      image: docker.io/reanahub/reana-server
-      environment:
-        REANA_SCHEDULER_REQUEUE_SLEEP: 2
-        REANA_RATELIMIT_SLOW: "5 per second"
-        REANA_RATELIMIT_GUEST_USER: "100 per second"
-        REANA_RATELIMIT_AUTHENTICATED_USER: "100 per second"
-    reana_workflow_controller:
-      image: docker.io/reanahub/reana-workflow-controller
-      environment:
-        REANA_RUNTIME_KUBERNETES_KEEP_ALIVE_JOBS_WITH_STATUSES: failed
-    reana_workflow_engine_cwl:
-      image: docker.io/reanahub/reana-workflow-engine-cwl
-    reana_workflow_engine_yadage:
-      image: docker.io/reanahub/reana-workflow-engine-yadage
-    reana_workflow_engine_serial:
-      image: docker.io/reanahub/reana-workflow-engine-serial
-    reana_workflow_engine_snakemake:
-      image: docker.io/reanahub/reana-workflow-engine-snakemake
-    reana_job_controller:
-      image: docker.io/reanahub/reana-job-controller
-    reana_message_broker:
-      image: docker.io/reanahub/reana-message-broker
-    reana_ui:
-      image: docker.io/reanahub/reana-ui
+  reana_db:
+    image: docker.io/library/postgres:14.10
+  reana_server:
+    image: docker.io/reanahub/reana-server
+    environment:
+      REANA_SCHEDULER_REQUEUE_SLEEP: 2
+      REANA_RATELIMIT_SLOW: "5 per second"
+      REANA_RATELIMIT_GUEST_USER: "100 per second"
+      REANA_RATELIMIT_AUTHENTICATED_USER: "100 per second"
+  reana_workflow_controller:
+    image: docker.io/reanahub/reana-workflow-controller
+    environment:
+      REANA_RUNTIME_KUBERNETES_KEEP_ALIVE_JOBS_WITH_STATUSES: failed
+  reana_workflow_engine_cwl:
+    image: docker.io/reanahub/reana-workflow-engine-cwl
+  reana_workflow_engine_yadage:
+    image: docker.io/reanahub/reana-workflow-engine-yadage
+  reana_workflow_engine_serial:
+    image: docker.io/reanahub/reana-workflow-engine-serial
+  reana_workflow_engine_snakemake:
+    image: docker.io/reanahub/reana-workflow-engine-snakemake
+  reana_job_controller:
+    image: docker.io/reanahub/reana-job-controller
+  reana_message_broker:
+    image: docker.io/reanahub/reana-message-broker
+  reana_ui:
+    image: docker.io/reanahub/reana-ui
 
 pgbouncer:
   enabled: true

run-tests.sh

@@ -75,6 +75,10 @@ check_helm () {
     helm lint helm/reana
 }
 
+check_yamllint () {
+    yamllint .
+}
+
 check_all () {
     check_commitlint
     check_shellcheck
@@ -85,6 +89,7 @@ check_all () {
     check_sphinx
     check_pytest
     check_helm
+    check_yamllint
 }
 
 if [ $# -eq 0 ]; then
@@ -103,5 +108,6 @@ case $arg in
     --check-sphinx) check_sphinx;;
     --check-pytest) check_pytest;;
     --check-helm) check_helm;;
+    --check-yamllint) check_yamllint;;
     *) echo "[ERROR] Invalid argument '$arg'. Exiting." && exit 1;;
 esac