Prune workflows based on changed files

Only run tests based on things that have actually changed. For
example, if only Python files have changed, we don't need to run
the C++ tests.

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
@@ -35,6 +36,52 @@ jobs:
       - devcontainer
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: always()
+    with:
+      needs: ${{ toJSON(needs) }}
+  changed-files:
+    runs-on: ubuntu-latest
+    name: "Check changed files"
+    outputs:
+      test_cpp: ${{ steps.changed-files.outputs.cpp_any_changed == 'true' }}
+      test_notebooks: ${{ steps.changed-files.outputs.notebooks_any_changed == 'true' }}
+      test_python: ${{ steps.changed-files.outputs.python_any_changed == 'true' }}
+    steps:
+      - name: Get PR info
+        id: get-pr-info
+        uses: rapidsai/shared-actions/get-pr-info@main
+      - name: Checkout code repo
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.sha }}
+          fetch-depth: ${{ fromJSON(steps.get-pr-info.outputs.pr-info).commits }}
+          persist-credentials: false
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v45
+        with:
+          base_sha: ${{ fromJSON(steps.get-pr-info.outputs.pr-info).base.sha }}
+          files_yaml: |
+            cpp:
+              - '**'
+              - '!docs/**'
+              - '!img/**'
+              - '!notebooks/**'
+              - '!python/**'
+              # TODO: Remove this before merging
+              - '!.github/**'
+            notebooks:
+              - '**'
+              - '!docs/**'
+              # TODO: Remove this before merging
+              - '!.github/**'
+            python:
+              - '**'
+              - '!docs/**'
+              - '!img/**'
+              - '!notebooks/**'
+              # TODO: Remove this before merging
+              - '!.github/**'
   checks:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
@@ -48,9 +95,10 @@ jobs:
       build_type: pull-request
       node_type: cpu32
   conda-cpp-tests:
-    needs: conda-cpp-build
+    needs: [conda-cpp-build, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_cpp == 'true'
     with:
       build_type: pull-request
   conda-cpp-checks:
@@ -68,15 +116,17 @@ 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: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
   conda-notebook-tests:
-    needs: conda-python-build
+    needs: [conda-python-build, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_notebooks == 'true'
     with:
       build_type: pull-request
       node_type: "gpu-v100-latest-1"
@@ -105,9 +155,10 @@ jobs:
       extra-repo-deploy-key: CUGRAPH_OPS_SSH_PRIVATE_DEPLOY_KEY
       node_type: cpu32
   wheel-tests-pylibcugraph:
-    needs: wheel-build-pylibcugraph
+    needs: [wheel-build-pylibcugraph, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
       script: ci/test_wheel_pylibcugraph.sh
@@ -122,9 +173,10 @@ jobs:
       extra-repo-sha: branch-24.10
       extra-repo-deploy-key: CUGRAPH_OPS_SSH_PRIVATE_DEPLOY_KEY
   wheel-tests-cugraph:
-    needs: wheel-build-cugraph
+    needs: [wheel-build-cugraph, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
       script: ci/test_wheel_cugraph.sh
@@ -136,9 +188,10 @@ jobs:
       build_type: pull-request
       script: ci/build_wheel_nx-cugraph.sh
   wheel-tests-nx-cugraph:
-    needs: wheel-build-nx-cugraph
+    needs: [wheel-build-nx-cugraph, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
       script: ci/test_wheel_nx-cugraph.sh
@@ -150,9 +203,10 @@ jobs:
       build_type: pull-request
       script: ci/build_wheel_cugraph-dgl.sh
   wheel-tests-cugraph-dgl:
-    needs: wheel-build-cugraph-dgl
+    needs: [wheel-build-cugraph-dgl, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
       script: ci/test_wheel_cugraph-dgl.sh
@@ -165,9 +219,10 @@ jobs:
       build_type: pull-request
       script: ci/build_wheel_cugraph-pyg.sh
   wheel-tests-cugraph-pyg:
-    needs: wheel-build-cugraph-pyg
+    needs: [wheel-build-cugraph-pyg, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
       script: ci/test_wheel_cugraph-pyg.sh
@@ -179,9 +234,10 @@ jobs:
       build_type: pull-request
       script: ci/build_wheel_cugraph-equivariant.sh
   wheel-tests-cugraph-equivariant:
-    needs: wheel-build-cugraph-equivariant
+    needs: [wheel-build-cugraph-equivariant, changed-files]
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/[email protected]
+    if: needs.changed-files.outputs.test_python == 'true'
     with:
       build_type: pull-request
       script: ci/test_wheel_cugraph-equivariant.sh