Play around with commands

Author: janhohenheim

Diff for: .github/workflows/ci.yml

@@ -15,7 +15,18 @@ jobs:
       # https://github.com/crazy-max/ghaction-github-pages/issues/1#issuecomment-623202206
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
+      with:
+          fetch-depth: ${{ github.event_name == 'pull_request' && 2 || 0 }}
+    - name: Get changed files
+      id: changed-files
+      # source: https://stackoverflow.com/a/74268200
+      run: |
+        if ${{ github.event_name == 'pull_request' }}; then
+            echo "changed_files=$(git diff --name-only -r HEAD^1 HEAD | xargs)" >> $GITHUB_OUTPUT
+        else
+            echo "changed_files=$(git diff --name-only ${{ github.event.before }} ${{ github.event.after }} | xargs)" >> $GITHUB_OUTPUT
+        fi
     - name: Lint
       uses: avto-dev/markdown-lint@v1
       with:
@@ -25,8 +36,8 @@ jobs:
       run: |
         npm install -g @umbrelladocs/linkspector
         echo "linkspector version: $(linkspector --version)"
-        echo "Files changed in this pr: $(git diff --name-only ${{ github.event.before }} ${{ github.sha }})"
-        linkspector check $(git diff --name-only ${{ github.event.before }} ${{ github.sha }})
+        echo "Files changed in this pr: ${{ steps.changed-files.outputs.changed_files }}"
+        linkspector check ${{ steps.changed-files.outputs.changed_files }}
     - name: Install Zola
       run: curl -L ${BASE_URL}/${VERS}/zola-${VERS}-${ARCH}.tar.gz | tar -xz
     - run: ./zola --version