Remove ZetaSQL and Modernize Build Toolchain

.bazelrc

@@ -15,6 +15,7 @@
 # This macro is needed in order for mlmd to build with ZetaSQL which can only
 # be compiled upon c++17 or higher.
 build --cxxopt="-std=c++17"
+build --host_cxxopt="-std=c++17"
 
 # Needed to avoid zetasql proto error.
 build --protocopt=--experimental_allow_proto3_optional
@@ -23,5 +24,31 @@ build --protocopt=--experimental_allow_proto3_optional
 # parameter 'user_link_flags' is deprecated and will be removed soon.
 # It may be temporarily re-enabled by setting --incompatible_require_linker_input_cc_api=false
 build --incompatible_require_linker_input_cc_api=false
+
 build:macos --apple_platform_type=macos
 build:macos_arm64 --cpu=darwin_arm64
+build:macos_arm64 --linkopt=-Wl,-undefined,dynamic_lookup
+build:macos_arm64 --host_linkopt=-Wl,-undefined,dynamic_lookup
+build --conlyopt=-std=c11
+build --host_conlyopt=-std=c11
+build --cxxopt=-std=c++17
+build --host_cxxopt=-std=c++17
+build --copt=-Wno-error
+build --cxxopt=-Wno-error
+build --cxxopt=-fpermissive
+build --conlyopt=-Wno-array-parameter
+build --conlyopt=-Wno-implicit-function-declaration
+build --host_copt=-Wno-error
+build --host_cxxopt=-Wno-error
+build --host_cxxopt=-fpermissive
+build --host_conlyopt=-Wno-array-parameter
+build --host_conlyopt=-Wno-implicit-function-declaration
+# Linux-only linker flags (not supported on macOS)
+build:linux --linkopt=-Wl,--no-as-needed
+build:linux --host_linkopt=-Wl,--no-as-needed
+build:macos_arm64 --copt=-Wno-error=c23-extensions
+build:macos_arm64 --host_copt=-Wno-error=c23-extensions
+build:macos_arm64 --copt=-Wno-c23-extensions
+build:macos_arm64 --host_copt=-Wno-c23-extensions
+build:macos_arm64 --action_env=CONDA_PREFIX
+build:macos_arm64 --action_env=CMAKE_ICONV_FLAG="-DCMAKE_DISABLE_FIND_PACKAGE_Iconv=ON -DICONV_LIBRARIES=$CONDA_PREFIX/lib/libiconv.dylib -DICONV_INCLUDE_DIR=$CONDA_PREFIX/include"

.github/workflows/conda-build.yml

@@ -0,0 +1,97 @@
+name: Build ml-metadata with Conda
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        python-version: ["3.9", "3.10", "3.11", "3.13"]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup Micromamba
+      uses: mamba-org/setup-micromamba@v1
+      with:
+        environment-file: ${{ matrix.os == 'macos-latest' && 'ci/environment-macos.yml' || 'ci/environment.yml' }}
+        cache-environment: true
+        create-args: >-
+          python=${{ matrix.python-version }}
+
+    - name: Display environment info
+      shell: bash -l {0}
+      run: |
+        micromamba info
+        micromamba list
+
+    - name: Install Bazel
+      shell: bash -l {0}
+      run: |
+        # Install Bazelisk (manages Bazel versions)
+        if [ "$RUNNER_OS" == "Linux" ]; then
+          curl -Lo /tmp/bazelisk https://github.com/bazelbuild/bazelisk/releases/download/v1.20.0/bazelisk-linux-amd64
+        elif [ "$RUNNER_OS" == "macOS" ]; then
+          curl -Lo /tmp/bazelisk https://github.com/bazelbuild/bazelisk/releases/download/v1.20.0/bazelisk-darwin-amd64
+        fi
+        chmod +x /tmp/bazelisk
+        sudo mv /tmp/bazelisk /usr/local/bin/bazel
+        echo "USE_BAZEL_VERSION=6.1.0" >> $GITHUB_ENV
+        bazel --version
+
+    - name: Build the package
+      shell: bash -l {0}
+      run: |
+        python setup.py bdist_wheel
+
+    - name: Repair wheel (Linux)
+      if: runner.os == 'Linux'
+      shell: bash -l {0}
+      run: |
+        WHEEL_PATH="$(ls dist/*.whl)"
+        WHEEL_DIR=$(dirname "${WHEEL_PATH}")
+        auditwheel repair --plat manylinux2014_x86_64 -w "${WHEEL_DIR}" "${WHEEL_PATH}"
+        rm "${WHEEL_PATH}"
+
+    - name: Upload wheel artifact
+      uses: actions/upload-artifact@v4.4.0
+      with:
+        name: ml-metadata-wheel-${{ matrix.os }}-py${{ matrix.python-version }}
+        path: dist/*.whl
+
+  upload_to_pypi:
+    name: Upload to PyPI
+    runs-on: ubuntu-latest
+    if: (github.event_name == 'release' && startsWith(github.ref, 'refs/tags')) || (github.event_name == 'workflow_dispatch')
+    needs: [build]
+    environment:
+      name: pypi
+      url: https://pypi.org/p/ml-metadata/
+    permissions:
+      id-token: write
+    steps:
+      - name: Retrieve wheels
+        uses: actions/download-artifact@v4.1.8
+        with:
+          merge-multiple: true
+          path: wheels
+
+      - name: List the build artifacts
+        run: |
+          ls -lAs wheels/
+
+      - name: Upload to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1.9
+        with:
+          packages_dir: wheels/

.github/workflows/conda-test.yml

@@ -0,0 +1,76 @@
+name: Test ml-metadata with Conda
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        python-version: ["3.9", "3.10", "3.11", "3.13"]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup Micromamba
+      uses: mamba-org/setup-micromamba@v1
+      with:
+        environment-file: ${{ matrix.os == 'macos-latest' && 'ci/environment-macos.yml' || 'ci/environment.yml' }}
+        cache-environment: true
+        create-args: >-
+          python=${{ matrix.python-version }}
+
+    - name: Display environment info
+      shell: bash -l {0}
+      run: |
+        micromamba info
+        micromamba list
+
+    - name: Install Bazel
+      shell: bash -l {0}
+      run: |
+        # Install Bazelisk (manages Bazel versions)
+        if [ "$RUNNER_OS" == "Linux" ]; then
+          curl -Lo /tmp/bazelisk https://github.com/bazelbuild/bazelisk/releases/download/v1.20.0/bazelisk-linux-amd64
+        elif [ "$RUNNER_OS" == "macOS" ]; then
+          curl -Lo /tmp/bazelisk https://github.com/bazelbuild/bazelisk/releases/download/v1.20.0/bazelisk-darwin-amd64
+        fi
+        chmod +x /tmp/bazelisk
+        sudo mv /tmp/bazelisk /usr/local/bin/bazel
+        echo "USE_BAZEL_VERSION=6.1.0" >> $GITHUB_ENV
+        bazel --version
+
+    - name: Build the package
+      shell: bash -l {0}
+      run: |
+        python setup.py bdist_wheel
+
+    - name: Install built wheel (Linux/macOS)
+      if: runner.os != 'Windows'
+      shell: bash -l {0}
+      run: |
+        pip install dist/*.whl
+
+    - name: Install built wheel (Windows)
+      if: runner.os == 'Windows'
+      shell: bash -l {0}
+      run: |
+        pip install (Get-ChildItem dist/*.whl | Select-Object -First 1).FullName
+
+    - name: Run tests
+      shell: bash -l {0}
+      run: |
+        # cleanup (interferes with tests)
+        rm -rf bazel-*
+        # run tests
+        pytest -vv