edit content-checks.yml to scan only files included in last commit

Author: AntoineSoetewey

.github/workflows/content-checks.yml

@@ -4,43 +4,121 @@ on:
   push:
     branches:
       - "**"
+    paths:
+      - "**/*.md"
+      - "**/*.qmd"
   pull_request:
+    paths:
+      - "**/*.md"
+      - "**/*.qmd"
 
 jobs:
+  detect-changes:
+    name: Detect changed content files
+    runs-on: ubuntu-latest
+    outputs:
+      files: ${{ steps.changed-files.outputs.files }}
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Collect changed markdown/quarto files
+        id: changed-files
+        shell: bash
+        run: |
+          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
+            base="${{ github.event.pull_request.base.sha }}"
+            head="${{ github.event.pull_request.head.sha }}"
+          else
+            base="${{ github.event.before }}"
+            head="${{ github.sha }}"
+          fi
+
+          changed_files=$(git diff --name-only "$base" "$head" -- '*.md' '*.qmd' | tr '\n' ' ')
+          echo "files=$changed_files" >> "$GITHUB_OUTPUT"
+
+      - name: Log changed files
+        if: steps.changed-files.outputs.files != ''
+        run: |
+          echo "Changed .md/.qmd files:"
+          printf '%s\n' ${{ steps.changed-files.outputs.files }}
+
+      - name: Job summary
+        if: steps.changed-files.outputs.files != ''
+        run: |
+          {
+            echo "## Changed content files"
+            echo
+            echo "Base: ${{ github.event.pull_request.base.sha || github.event.before }}"
+            echo "Head: ${{ github.event.pull_request.head.sha || github.sha }}"
+            echo
+            for file in ${{ steps.changed-files.outputs.files }}; do
+              echo "- $file"
+            done
+          } >> "$GITHUB_STEP_SUMMARY"
+
+      - name: Job summary (no changes)
+        if: steps.changed-files.outputs.files == ''
+        run: |
+          {
+            echo "## Changed content files"
+            echo
+            echo "Base: ${{ github.event.pull_request.base.sha || github.event.before }}"
+            echo "Head: ${{ github.event.pull_request.head.sha || github.sha }}"
+            echo
+            echo "No .md/.qmd files changed in this commit/PR."
+          } >> "$GITHUB_STEP_SUMMARY"
+
   spell-check:
     name: Spell check (md/qmd)
     runs-on: ubuntu-latest
+    needs: detect-changes
     steps:
       - name: Check out repository
         uses: actions/checkout@v4
 
+      - name: Skip notice (no md/qmd changes)
+        if: needs.detect-changes.outputs.files == ''
+        run: echo "No .md/.qmd files changed; skipping spell check."
+
       - name: Set up Python
+        if: needs.detect-changes.outputs.files != ''
         uses: actions/setup-python@v5
         with:
           python-version: "3.x"
 
       - name: Install codespell
+        if: needs.detect-changes.outputs.files != ''
         run: python -m pip install --upgrade pip codespell
 
       - name: Run codespell on .md and .qmd
+        if: needs.detect-changes.outputs.files != ''
         run: |
-          codespell --quiet-level=2 $(git ls-files '*.md' '*.qmd')
+          codespell --quiet-level=2 ${{ needs.detect-changes.outputs.files }}
 
   link-check:
     name: Link check (md/qmd)
     runs-on: ubuntu-latest
+    needs: detect-changes
     steps:
       - name: Check out repository
         uses: actions/checkout@v4
 
+      - name: Skip notice (no md/qmd changes)
+        if: needs.detect-changes.outputs.files == ''
+        run: echo "No .md/.qmd files changed; skipping link check."
+
       - name: Run lychee on .md and .qmd
         uses: lycheeverse/lychee-action@v1.10.0
+        if: needs.detect-changes.outputs.files != ''
         with:
           args: >-
             --no-progress
             --verbose
             --accept 200,204,206
             --exclude-mail
-            $(git ls-files '*.md' '*.qmd')
+            ${{ needs.detect-changes.outputs.files }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}