[CI, Enhancement] Add Codecov support

.github/workflows/ci.yml

@@ -139,14 +139,16 @@ jobs:
           export COVERAGE_FILE=$(pwd)/.coverage.sklearn
           if [ "${{ steps.set-env.outputs.DPCFLAG }}" == "" ]; then export CPU=cpu; fi
           bash .ci/scripts/run_sklearn_tests.sh $CPU
-      - name: Archive coverage data
+      - name: Create coverage report
+        run: |
+          source venv/bin/activate
+          coverage combine .coverage.sklearnex .coverage.sklearn
+          coverage json -o coverage.lnx${{ matrix.PYTHON_VERSION }}_${{ matrix.SKLEARN_VERSION }}.json
+      - name: Archive coverage report
         uses: actions/upload-artifact@v4
         with:
           name: coverage_lnx_Py${{ matrix.PYTHON_VERSION }}_${{ matrix.SKLEARN_VERSION }}
-          path: |
-             .coverage.sklearn
-             .coverage.sklearnex
-          include-hidden-files: true
+          path: coverage.lnx${{ matrix.PYTHON_VERSION }}_${{ matrix.SKLEARN_VERSION }}.json
       - name: Sklearn testing [preview]
         run: |
           source venv/bin/activate
@@ -282,14 +284,17 @@ jobs:
           set COVERAGE_FILE=%cd%\.coverage.sklearn
           if "${{ steps.set-env.outputs.DPCFLAG }}"=="" set CPU=cpu
           bash .ci/scripts/run_sklearn_tests.sh %CPU%
-      - name: Archive coverage data
+      - name: Create coverage report
+        shell: cmd
+        run: |
+          call .\venv\Scripts\activate.bat
+          coverage combine .coverage.sklearnex .coverage.sklearn
+          coverage json -o coverage.win${{ matrix.PYTHON_VERSION }}_${{ matrix.SKLEARN_VERSION }}.json
+      - name: Archive coverage report
         uses: actions/upload-artifact@v4
         with:
           name: coverage_win_Py${{ matrix.PYTHON_VERSION }}_${{ matrix.SKLEARN_VERSION }}
-          path: |
-             .coverage.sklearn
-             .coverage.sklearnex
-          include-hidden-files: true
+          path: coverage.win${{ matrix.PYTHON_VERSION }}_${{ matrix.SKLEARN_VERSION }}.json
       - name: Sklearn testing [preview]
         shell: cmd
         run: |

.github/workflows/codecov.yml

@@ -0,0 +1,57 @@
+#===============================================================================
+# Copyright contributors to the oneDAL project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#===============================================================================
+
+name: codecov
+on:
+  workflow_run:
+    workflows: [CI]
+    types:
+      - completed
+
+permissions: read-all
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref_name }}-${{ github.event.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  upload_coverage:
+    name: Codecov
+    runs-on: ubuntu-24.04
+    if: ${{ github.repository == 'uxlfoundation/scikit-learn-intelex' && github.event.workflow_run.conclusion == 'success' }}
+    timeout-minutes: 5
+
+    steps:
+      - name: Checkout Scikit-learn-intelex
+        uses: actions/checkout@v4
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: coverage
+          github-token: ${{ github.token }}
+          run-id: ${{ github.event.workflow_run.id }}
+          merge-multiple: true
+      - name: Install codecov cli
+        run: |
+          curl -Os https://cli.codecov.io/latest/linux/codecov
+          chmod +x codecov
+      - name: Upload to codecov
+        run: |
+          export PR=${{ github.event.workflow_run.pull_requests[0].number }}
+          export SHA=${{ github.event.workflow_run.head_sha }}
+          export CODECOV_NAME=CI-$PR-$SHA
+          if [ -n "${PR}" ]; then export PR="-P ${PR}"; fi
+          ./codecov -v upload-process -Z -t ${{ secrets.CODECOV_TOKEN }} -n $CODECOV_NAME -C $SHA -F github -s ./coverage $PR