ci: make yamllint report as success if no yaml files changed

Require to block PR merging

Author: danctorres

.github/workflows/clang_tidy.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Run Clang-Tidy
         run: |
           CHANGED_FILES=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }})
-          if echo "$CHANGED_FILES" | grep -E '\.(cpp|h|hpp|cc|cxx|hxx)$' > /dev/null; then
+          if echo "$CHANGED_FILES" | grep -qE '\.(cpp|h|hpp|cc|cxx|hxx)$'; then
             echo -e "Running clang-tidy"
             bazel build //... \
             --aspects @bazel_clang_tidy//clang_tidy:clang_tidy.bzl%clang_tidy_aspect \

.github/workflows/yamllint.yml

@@ -2,7 +2,7 @@
 name: Lint YAML files
 on:  # yamllint disable-line rule:truthy
   pull_request:
-    paths: ['**/*.yml', '**/*.yaml']
+    branches: ['*']
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -15,4 +15,10 @@ jobs:
           pip install yamllint
       - name: Lint YAML files
         run: |
-          yamllint . || exit 1
+          CHANGED_FILES=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }})
+          if echo "$CHANGED_FILES" | grep -qE '\.(yml|yaml)$'; then
+            echo -e "Running yamllint"
+            yamllint . || exit 1
+          else
+            echo -e "Skipping yamllint since no YAML files were changed."
+          fi