Filter md

Author: janhohenheim

Diff for: .github/workflows/ci.yml

@@ -23,21 +23,20 @@ jobs:
       # source: https://stackoverflow.com/a/74268200
       run: |
         if ${{ github.event_name == 'pull_request' }}; then
-            changed_files=$(git diff --name-only -r HEAD^1 HEAD | xargs)
+            changed_files=$(git diff --name-only -r HEAD^1 HEAD -z | grep '\.md$' -zZ | xargs -0)
         else
-            changed_files=$(git diff --name-only ${{ github.event.before }} ${{ github.event.after }} | xargs)
+            changed_files=$(git diff --name-only ${{ github.event.before }} ${{ github.event.after }} -z | grep '\.md$' -zZ | xargs -0)
         fi
-        # filter out non-markdown files
-        md_files=$(echo "$changed_files" | grep -E '\.md$')
-        echo "changed_files: $md_files"
-        echo "changed_files=$md_files" >> $GITHUB_ENV
+        echo "changed_files: $changed_files"
+        echo "changed_files=$changed_files" >> $GITHUB_OUTPUT
     - name: Lint
       uses: avto-dev/markdown-lint@v1
       with:
         args: '.'
         config: '.markdownlint.json'
     - name: Check links
       uses: lycheeverse/[email protected]
+      if: ${{ steps.changed-files.outputs.changed_files != '' }}
       with:
         fail: true
         args: --verbose --no-progress --accept '100..=103,200..=299,300..=399' ${{ steps.changed-files.outputs.changed_files }}