openexr: add build-openexr.yml for riscv64 wheels

.github/workflows/build-openexr.yml

@@ -0,0 +1,96 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `build_wheels` job of
+# https://github.com/AcademySoftwareFoundation/openexr/blob/v3.4.15/.github/workflows/python-wheels.yml
+name: Build openexr wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'openexr version to build (git tag without the leading v, e.g. 3.4.15)'
+        required: true
+        default: '3.4.15'
+  pull_request:
+    paths:
+      - '.github/workflows/build-openexr.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '3.4.15' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  # `inputs.version` is empty on pull_request events; default to 3.4.15 there.
+  OPENEXR_VERSION: ${{ inputs.version || '3.4.15' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+  # CMakeLists.txt FetchContent-pulls Imath at this tag when OPENEXR_FORCE_INTERNAL_IMATH
+  # is set; bump alongside it if upstream ever moves the pin.
+  IMATH_TAG: v3.2.2
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build openexr ${{ inputs.version || '3.4.15' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 90
+    strategy:
+      fail-fast: false
+      matrix:
+        python: ["cp312", "cp313", "cp314", "cp314t"]
+
+    steps:
+      - name: Checkout openexr v${{ env.OPENEXR_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: AcademySoftwareFoundation/openexr
+          ref: v${{ env.OPENEXR_VERSION }}
+          persist-credentials: false
+
+      # Imath, libdeflate and OpenJPH are statically linked in (OPENEXR_FORCE_INTERNAL_*),
+      # but upstream's own wheel only ships LICENSE.md; libdeflate/OpenJPH are vendored
+      # under external/ while Imath is git-fetched at configure time (gotcha 53), so none
+      # of the three licences reach dist-info without staging them at the project root.
+      - name: Stage vendored licences
+        run: |
+          cp external/deflate/COPYING LICENSE.deflate
+          cp external/OpenJPH/LICENSE LICENSE.openjph
+          curl -fsSL --retry 5 "https://raw.githubusercontent.com/AcademySoftwareFoundation/Imath/${{ env.IMATH_TAG }}/LICENSE.md" -o LICENSE.imath
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          CIBW_ENVIRONMENT: PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+          # OpenEXR's compiled extension has no Py_mod_gil slot, so cp314t
+          # re-enables the GIL at import and the test suite's warnings-as-errors
+          # config turns that into a collection error (gotcha 127).
+          CIBW_TEST_ENVIRONMENT: PIP_ONLY_BINARY=numpy PYTHON_GIL=1
+          CIBW_TEST_COMMAND: >-
+            python -c "import importlib.metadata as m; f = sorted(str(p).split('licenses/', 1)[1] for p in m.files('openexr') if '.dist-info/licenses/' in str(p)); assert f == ['LICENSE.deflate', 'LICENSE.imath', 'LICENSE.md', 'LICENSE.openjph'], f" &&
+            pytest -s {project}/src/wrappers/python/tests
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: openexr-${{ env.OPENEXR_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish openexr ${{ inputs.version || '3.4.15' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: openexr-${{ inputs.version || '3.4.15' }}-*-manylinux_riscv64