Migrate conda packaging to rattler-build (v1 recipe format) for GitHub Actions CI

.github/workflows/conda-package.yml

@@ -57,8 +57,6 @@ jobs:
         shell: ${{ matrix.os == 'windows-2022' && 'cmd /C CALL {0}' || 'bash -el {0}' }}
 
     env:
-      build-conda-pkg-env: 'environments/build_conda_pkg.yml'
-      build-env-name: 'build'
       python-label: ${{ endsWith(matrix.python_spec, 't') && format('{0}t', matrix.python) || matrix.python }}
       python-conda-spec: ${{ matrix.python_spec || matrix.python }}
 
@@ -73,46 +71,74 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Setup miniconda
-        id: setup_miniconda
-        continue-on-error: true
-        uses: conda-incubator/setup-miniconda@8ee1f361103df19b6f8c8655fd3967a8ecb162d5 # v4.0.1
+      # rattler-build is a standalone binary with no conda/Python dependency,
+      # so building conda packages with it doesn't need a full conda
+      # distribution on the runner - only rattler-build itself needs to be on
+      # PATH
+      - name: Setup rattler-build
+        uses: prefix-dev/rattler-build-action@v0.2.39
         with:
-          miniforge-version: latest
-          use-mamba: 'true'
-          conda-remove-defaults: 'true'
-          environment-file: ${{ env.build-conda-pkg-env }}
-          activate-environment: ${{ env.build-env-name }}
-
-      - name: ReSetup miniconda
-        if: steps.setup_miniconda.outcome == 'failure'
-        uses: conda-incubator/setup-miniconda@8ee1f361103df19b6f8c8655fd3967a8ecb162d5 # v4.0.1
-        with:
-          miniforge-version: latest
-          use-mamba: 'true'
-          conda-remove-defaults: 'true'
-          environment-file: ${{ env.build-conda-pkg-env }}
-          activate-environment: ${{ env.build-env-name }}
+          setup-only: true
 
-      - name: List installed packages
-        run: mamba list
+      - name: Check rattler-build version
+        run: rattler-build --version
 
-      - name: Store conda paths as envs
+      - name: Store build output paths
         shell: bash -el {0}
         run: |
-          echo "CONDA_BLD=$CONDA_PREFIX/conda-bld/${{ runner.os == 'Linux' && 'linux' || 'win' }}-64/" | tr "\\\\" '/' >> "$GITHUB_ENV"
+          echo "CONDA_BLD=$GITHUB_WORKSPACE/output/${{ runner.os == 'Linux' && 'linux-64' || 'win-64' }}/" >> "$GITHUB_ENV"
           echo "WHEELS_OUTPUT_FOLDER=$GITHUB_WORKSPACE${{ runner.os == 'Linux' && '/' || '\\' }}" >> "$GITHUB_ENV"
 
+      - name: Compute version from git describe
+        shell: bash -el {0}
+        run: |
+          DESCRIBE=$(git describe --tags --long)
+          echo "GIT_DESCRIBE_TAG=$(echo "$DESCRIBE" | sed -E 's/-[0-9]+-g[0-9a-f]+$//')" >> "$GITHUB_ENV"
+          echo "GIT_DESCRIBE_NUMBER=$(echo "$DESCRIBE" | sed -E 's/^.*-([0-9]+)-g[0-9a-f]+$/\1/')" >> "$GITHUB_ENV"
+
+      # rattler-build looks for build.bat on Windows (build.sh/build.bat is the
+      # symmetric naming it expects), while conda-build is still used for this
+      # recipe in non-GitHub CI and required bld.bat.
+      # Keep bld.bat as the single real source file and
+      # just copy it under the name rattler-build needs, so both build systems
+      # keep working off the same script without maintaining two duplicates
+      - name: Prepare build.bat for rattler-build
+        if: runner.os == 'Windows'
+        shell: bash -el {0}
+        run: cp conda-recipe/bld.bat conda-recipe/build.bat
+
       - name: Build conda package
         id: build_conda_pkg
         continue-on-error: true
-        run: conda-build --no-test --python "${{ env.python-conda-spec }}" --numpy 2.0 ${{ env.channels-list }} conda-recipe
+        shell: bash -el {0}
+        run: |
+          read -ra RATTLER_CHANNELS <<< "$(echo "${{ env.channels-list }}" | sed 's/--override-channels//')"
+          rattler-build build \
+            --recipe conda-recipe \
+            --no-include-recipe \
+            --channel-priority disabled \
+            --target-platform ${{ runner.os == 'Linux' && 'linux-64' || 'win-64' }} \
+            --variant-config conda-recipe/conda_build_config.yaml \
+            --variant "python=${{ env.python-conda-spec }}" \
+            --variant numpy=2 \
+            "${RATTLER_CHANNELS[@]}"
         env:
           MAX_BUILD_CMPL_MKL_VERSION: '2027.0a0'
 
       - name: ReBuild conda package
         if: steps.build_conda_pkg.outcome == 'failure'
-        run: conda-build --no-test --python "${{ env.python-conda-spec }}" --numpy 2.0 ${{ env.channels-list }} conda-recipe
+        shell: bash -el {0}
+        run: |
+          read -ra RATTLER_CHANNELS <<< "$(echo "${{ env.channels-list }}" | sed 's/--override-channels//')"
+          rattler-build build \
+            --recipe conda-recipe \
+            --no-include-recipe \
+            --channel-priority disabled \
+            --target-platform ${{ runner.os == 'Linux' && 'linux-64' || 'win-64' }} \
+            --variant-config conda-recipe/conda_build_config.yaml \
+            --variant "python=${{ env.python-conda-spec }}" \
+            --variant numpy=2 \
+            "${RATTLER_CHANNELS[@]}"
         env:
           MAX_BUILD_CMPL_MKL_VERSION: '2027.0a0'
 

conda-recipe/recipe.yaml

@@ -0,0 +1,121 @@
+schema_version: 1
+
+context:
+  max_compiler_and_mkl_version: ${{ env.get("MAX_BUILD_CMPL_MKL_VERSION", default="2027.0a0") }}
+  required_compiler_version: ${{ env.get("MIN_BUILD_CMPL_VERSION", default="2026.1.1") }}
+  required_mkl_version: "2026.0"
+  required_dpctl_version: 0.23.0dev0
+
+package:
+  name: dpnp
+  version: ${{ env.get("GIT_DESCRIBE_TAG") }}
+
+source:
+  path: ..
+
+build:
+  number: ${{ env.get("GIT_DESCRIBE_NUMBER") }}
+  script:
+    env:
+      WHEELS_OUTPUT_FOLDER: ${{ env.get("WHEELS_OUTPUT_FOLDER", default="") }}
+      OVERRIDE_INTEL_IPO: ${{ env.get("OVERRIDE_INTEL_IPO", default="") }}
+      # conda-build used to forward GIT_DESCRIBE_NUMBER into the build script
+      # automatically; rattler-build does not, so bld.bat's
+      # `wheel tags --remove --build %GIT_DESCRIBE_NUMBER%` was silently
+      # getting an empty value on Windows, which made that command fail and
+      # broke the wheel install step further down the script.
+      GIT_DESCRIBE_NUMBER: ${{ env.get("GIT_DESCRIBE_NUMBER") }}
+  dynamic_linking:
+    missing_dso_allowlist:
+      - "*DPCTLSyclInterface*"
+      - "*/dpnp_backend_c.dll"
+
+requirements:
+  host:
+    - python
+    - pip >=25.0
+    - pybind11 >=3.0.2
+    - python-build>=1.2.2
+    - cmake>=3.31.6
+    - cython>=3.1.0
+    - dpctl >=${{ required_dpctl_version }}
+    - if: not win
+      then: ninja>=1.11.1
+    - numpy
+    - scikit-build>=0.18.1
+    - setuptools>=79.0.1
+    - wheel>=0.45.1
+    - versioneer ==0.29
+    # versioneer dependency
+    - if: match(python, "<3.11")
+      then: tomli
+    # Do not use pyproject.toml for setting dependencies on OneAPI packages
+    - mkl-devel-dpcpp >=${{ required_mkl_version }},<${{ max_compiler_and_mkl_version }}
+    - onedpl-devel
+    - tbb-devel
+    - if: win
+      then: opencl-headers >=2025.06.13
+  build:
+    - ${{ compiler('cxx') }}
+    - ${{ stdlib('c') }}
+    - ${{ compiler('dpcpp') }} >=${{ required_compiler_version }},<${{ max_compiler_and_mkl_version }}
+  run:
+    - python
+    - ${{ pin_compatible('dpctl', lower_bound='x.x.x', upper_bound=None) }}
+    - ${{ pin_compatible('dpcpp-cpp-rt', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('intel-sycl-rt', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('intel-cmplr-lib-rt', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('mkl', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('onemkl-sycl-blas', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('onemkl-sycl-dft', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('onemkl-sycl-lapack', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('onemkl-sycl-rng', lower_bound='x.x', upper_bound='x') }}
+    - ${{ pin_compatible('onemkl-sycl-vm', lower_bound='x.x', upper_bound='x') }}
+    - numpy
+    - if: linux
+      then: ocl-icd-system
+    - if: win
+      then: khronos-opencl-icd-loader
+  ignore_run_exports:
+    by_name:
+      - dpctl
+      - numpy
+      - python
+      # building with Intel DPC++ and do not import the MSVC runtime DLLs
+      - if: win
+        then: vc14_runtime
+      - if: win
+        then: ucrt
+
+tests:
+  - script:
+      - python -c "import dpnp; print(dpnp.__version__)"
+    requirements:
+      run:
+        - pytest
+        - setuptools
+        - if: match(python, "<3.14")
+          then: scipy
+
+about:
+  license: BSD-3-Clause
+  license_file: LICENSE.txt
+  summary: Data Parallel Extension for NumPy
+  description: |
+    <strong>LEGAL NOTICE: Use of this software package is subject to the
+    software license agreement (as set forth above, in the license section of
+    the installed Conda package and/or the README file) and all notices,
+    disclaimers or license terms for third party or open source software
+    included in or with the software.</strong>
+    <br/><br/>
+    EULA: <a href="https://opensource.org/licenses/BSD-3-Clause" target="_blank">BSD-3-Clause</a>
+    <br/><br/>
+
+
+  homepage: https://github.com/IntelPython/dpnp
+
+extra:
+  recipe-maintainers:
+    - antonwolfy
+    - vlad-perevezentsev
+    - ndgrigorian

environments/build_conda_pkg.yml

@@ -2,5 +2,4 @@ name: Build DPNP conda package
 channels:
   - conda-forge
 dependencies:
-  - conda-build=25.11.1
-  - conda-verify=3.4.2
+  - rattler-build