[CI] macos-latest -> macos-10.15 (#836)

This avoids trying to install missing pytorch wheels after the latest
runner image update

.github/workflows/integration-tests.yml

@@ -8,20 +8,19 @@ on:
       - triton-mlir
 
 jobs:
-
   Runner-Preparation:
     runs-on: ubuntu-latest
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
-    - name: Prepare runner matrix
-      id: set-matrix
-      run: |
-        if [ x"${{ github.repository }}" == x"openai/triton" ]; then
-          echo '::set-output name=matrix::[["self-hosted", "A10"], "macos-latest"]'
-        else
-          echo '::set-output name=matrix::["ubuntu-latest", "macos-latest"]'
-        fi
+      - name: Prepare runner matrix
+        id: set-matrix
+        run: |
+          if [ x"${{ github.repository }}" == x"openai/triton" ]; then
+            echo '::set-output name=matrix::[["self-hosted", "A10"], "macos-10.15"]'
+          else
+            echo '::set-output name=matrix::["ubuntu-latest", "macos-10.15"]'
+          fi
 
   Integration-Tests:
     needs: Runner-Preparation
@@ -33,7 +32,6 @@ jobs:
         runner: ${{fromJson(needs.Runner-Preparation.outputs.matrix)}}
 
     steps:
-
       - name: Checkout
         uses: actions/checkout@v2
 
@@ -42,33 +40,32 @@ jobs:
           rm -rf ~/.triton/cache/
 
       - name: Check imports
-        if: ${{ matrix.runner != 'macos-latest' }}
+        if: startsWith(matrix.runner, 'ubuntu')
         run: |
           pip install isort
           isort -c ./python || ( echo '::error title=Imports not sorted::Please run \"isort ./python\"' ; exit 1 )
 
       - name: Check python style
-        if: ${{ matrix.runner != 'macos-latest' }}
+        if: startsWith(matrix.runner, 'ubuntu')
         run: |
           pip install autopep8
           autopep8 -a -r -d --exit-code ./python || ( echo '::error title=Style issues::Please run \"autopep8 -a -r -i ./python\"' ; exit 1 )
 
       - name: Check cpp style
-        if: ${{ matrix.runner != 'macos-latest' }}
+        if: startsWith(matrix.runner, 'ubuntu')
         run: |
           pip install clang-format
           find . -regex '.*\.\(cpp\|hpp\|h\|cc\)' -not -path "./python/build/*" -not -path "./include/triton/external/*" -print0 | xargs -0 -n1 clang-format -style=file --dry-run -Werror -i ||
           (echo '::error title=Style issues:: Please run `find . -regex ".*\.\(cpp\|hpp\|h\|cc\)" -not -path "./python/build/*" -not -path "./include/triton/external/*" -print0 | xargs -0 -n1 clang-format -style=file -i`' ; exit 1)
 
       - name: Flake8
-        if: ${{ matrix.runner != 'macos-latest' }}
+        if: startsWith(matrix.runner, 'ubuntu')
         run: |
           pip install flake8
           flake8 --config ./python/setup.cfg ./python || ( echo '::error::Flake8 failed; see logs for errors.' ; exit 1 )
 
       - name: Install Triton
         run: |
-          alias python='python3'
           cd python
           TRITON_USE_ASSERT_ENABLED_LLVM=TRUE pip3 install -e '.[tests]'
 
@@ -82,7 +79,7 @@ jobs:
           lit -v "$LIT_TEST_DIR"
 
       - name: Run python tests
-        if: ${{ matrix.runner[0] == 'self-hosted' }}
+        if: ${{matrix.runner[0] == 'self-hosted'}}
         run: |
           cd python/tests
           pytest