Prune workflows based on changed files

Contributes to rapidsai/build-planning#94

.github/workflows/pr.yaml

@@ -12,6 +12,7 @@ concurrency:
 jobs:
   pr-builder:
     needs:
+      - changed-files
       - checks
       - conda-cpp-build
       - conda-cpp-tests
@@ -22,6 +23,27 @@ jobs:
       - wheel-test-pylibwholegraph
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: always()
+    with:
+      needs: ${{ toJSON(needs) }}
+  changed-files:
+    secrets: inherit
+    uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    with:
+      files_yaml: |
+        test_cpp:
+          - '**'
+          - '!.pre-commit-config.yaml'
+          - '!README.md'
+          - '!python/**'
+          # TODO: Remove this before merging
+          - '!.github/workflows/**'
+        test_python:
+          - '**'
+          - '!.pre-commit-config.yaml'
+          - '!README.md'
+          # TODO: Remove this before merging
+          - '!.github/workflows/**'
   checks:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
@@ -35,9 +57,10 @@ jobs:
       build_type: pull-request
       node_type: cpu16
   conda-cpp-tests:
-    needs: conda-cpp-build
+    needs: [conda-cpp-build, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_cpp
     with:
       build_type: pull-request
   conda-python-build:
@@ -47,9 +70,10 @@ jobs:
     with:
       build_type: pull-request
   conda-python-tests:
-    needs: conda-python-build
+    needs: [conda-python-build, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python
     with:
       build_type: pull-request
   docs-build:
@@ -69,9 +93,10 @@ jobs:
       build_type: pull-request
       script: ci/build_wheel.sh
   wheel-test-pylibwholegraph:
-    needs: wheel-build-pylibwholegraph
+    needs: [wheel-build-pylibwholegraph, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python
     with:
       build_type: pull-request
       script: ci/test_wheel.sh