ci(spread): run docs tests if docs are changed

.github/workflows/spread.yaml

@@ -24,7 +24,36 @@ jobs:
           name: snap
           path: ${{ steps.rockcraft.outputs.snap }}
 
-  snap-tests:
+  #  snap-tests:
+  #    runs-on: [self-hosted, spread-installed]
+  #    needs: [snap-build]
+  #
+  #    steps:
+  #      - name: Cleanup job workspace
+  #        run: |
+  #          rm -rf "${{ github.workspace }}"
+  #          mkdir "${{ github.workspace }}"
+  #      - name: Checkout rockcraft
+  #        uses: actions/checkout@v4
+  #        with:
+  #          fetch-depth: 0
+  #          submodules: true
+  #      - name: Download snap artifact
+  #        uses: actions/download-artifact@v4
+  #        with:
+  #          name: snap
+  #          path: tests
+  #      - name: Run spread
+  #        run: spread
+  #
+  #      - name: Discard spread workers
+  #        if: always()
+  #        run: |
+  #          shopt -s nullglob
+  #          for r in .spread-reuse.*.yaml; do
+  #            spread -discard -reuse-pid="$(echo "$r" | grep -o -E '[0-9]+')"
+  #          done
+  docs-tests:
     runs-on: [self-hosted, spread-installed]
     needs: [snap-build]
 
@@ -38,14 +67,21 @@ jobs:
         with:
           fetch-depth: 0
           submodules: true
+      - name: Check if docs are changed
+        uses: dorny/paths-filter@v3
+        id: changes
+        with:
+          filters: |
+            docs:
+              - 'docs/**'
       - name: Download snap artifact
+        if: steps.changes.outputs.docs == 'true'
         uses: actions/download-artifact@v4
         with:
           name: snap
           path: tests
-      - name: Run spread
-        run: spread
-
+      - name: Run docs spread tests
+        run: spread docs/
       - name: Discard spread workers
         if: always()
         run: |