use yaml anchor to de-dupe linux action (#986)

Author: jjhelmus

.github/workflows/linux.yml

@@ -218,7 +218,7 @@ jobs:
       matrix: ${{ fromJson(needs.generate-matrix.outputs.python-build-matrix-0) }}
       fail-fast: false
     name: ${{ matrix.target_triple }} / ${{ matrix.python }} / ${{ matrix.build_options }}
-    steps:
+    steps: &build_steps
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           fetch-depth: 0
@@ -326,96 +326,4 @@ jobs:
       matrix: ${{ fromJson(needs.generate-matrix.outputs.python-build-matrix-1) }}
       fail-fast: false
     name: ${{ matrix.target_triple }} / ${{ matrix.python }} / ${{ matrix.build_options }}
-    steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-
-      - name: Set up uv
-        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
-        with:
-          enable-cache: false
-
-      - name: Download pythonbuild
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
-        with:
-          name: ${{ matrix.crate_artifact_name }}
-          path: build
-
-      - name: Download images
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
-        with:
-          pattern: image-*
-          path: build
-          merge-multiple: true
-
-      - name: Cache downloads
-        uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
-        with:
-          path: build/downloads
-          key: ${{ matrix.target_triple }}-${{ hashFiles('pythonbuild/downloads.py')}}
-          restore-keys: |
-            ${{ matrix.target_triple }}-${{ hashFiles('pythonbuild/downloads.py')}}
-            ${{ matrix.target_triple }}-
-
-      - name: Load Docker Images
-        run: |
-          for f in build/image-*.tar.zst; do
-            echo "decompressing $f"
-            zstd -d --rm ${f}
-          done
-
-          for f in build/image-*.tar; do
-            echo "loading $f"
-            docker load --input $f
-          done
-
-      - name: Build
-        if: ${{ ! matrix.dry-run }}
-        run: |
-          # Do empty target so all generated files are touched.
-          ./build.py --make-target empty
-
-          # Touch mtimes of all images so they are newer than autogenerated files above.
-          touch build/image-*
-
-          ./build.py --target-triple ${MATRIX_TARGET_TRIPLE} --python cpython-${MATRIX_PYTHON} --options ${MATRIX_BUILD_OPTIONS}
-        env:
-          MATRIX_TARGET_TRIPLE: ${{ matrix.target_triple }}
-          MATRIX_PYTHON: ${{ matrix.python }}
-          MATRIX_BUILD_OPTIONS: ${{ matrix.build_options }}
-
-      - name: Generate attestations
-        uses: actions/attest-build-provenance@977bb373ede98d70efdf65b84cb5f73e068dcc2a # v3.0.0
-        if: ${{ github.ref == 'refs/heads/main' }}
-        with:
-          subject-path: dist/*
-
-      - name: Upload Distribution
-        if: ${{ ! matrix.dry-run }}
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
-        with:
-          name: cpython-${{ matrix.python }}-${{ matrix.target_triple }}-${{ matrix.build_options }}
-          path: dist/*
-
-      - name: Validate Distribution
-        if: ${{ ! matrix.dry-run }}
-        run: |
-          chmod +x build/pythonbuild
-
-          if [ "${MATRIX_RUN}" == "true" ]; then
-            if [ "${MATRIX_LIBC}" == "musl" ]; then
-              sudo apt install musl-dev
-
-              # GitHub's setup-python action sets `LD_LIBRARY_PATH` which overrides `RPATH`
-              # as used in the musl builds.
-              unset LD_LIBRARY_PATH
-            fi
-            EXTRA_ARGS="--run"
-          fi
-
-          build/pythonbuild validate-distribution ${EXTRA_ARGS} dist/*.tar.zst
-        env:
-          MATRIX_RUN: ${{ matrix.run }}
-          MATRIX_LIBC: ${{ matrix.libc }}
+    steps: *build_steps