pycrc32: add build-pycrc32.yml for riscv64 wheels

.github/workflows/build-pycrc32.yml

@@ -0,0 +1,97 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `linux` job of
+# https://github.com/code-inflation/pycrc32/blob/v0.3.0/.github/workflows/CI.yml
+name: Build pycrc32 wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'pycrc32 version to build (git tag without the leading v, e.g. 0.3.0)'
+        required: true
+        default: '0.3.0'
+  pull_request:
+    paths:
+      - '.github/workflows/build-pycrc32.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.3.0' }}-${{ 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 0.3.0 there.
+  PYCRC32_VERSION: ${{ inputs.version || '0.3.0' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build pycrc32 ${{ inputs.version || '0.3.0' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        # No abi3 feature on pyo3 in Cargo.toml, so upstream ships one wheel
+        # per interpreter (matches PyPI's cp3xx-cp3xx tags). The v0.3.0 tag
+        # pins pyo3 = "0.23.3" (master has since bumped to 0.25.1), whose max
+        # supported Python is 3.13 - cp314/cp314t fail to build against this
+        # release with "The configured Python interpreter version (3.14) is
+        # newer than PyO3's maximum supported version (3.13)".
+        python: ["cp312", "cp313"]
+
+    steps:
+      - name: Checkout pycrc32 v${{ env.PYCRC32_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: code-inflation/pycrc32
+          ref: v${{ env.PYCRC32_VERSION }}
+          persist-credentials: false
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+        env:
+          # musllinux is dropped: rustup.rs ships no riscv64 musl toolchain.
+          CIBW_BUILD: ${{ matrix.python }}-manylinux_riscv64
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # pycrc32 ships no [tool.cibuildwheel]; the Rust toolchain its
+          # maturin backend needs is installed in-container here.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          CIBW_ENVIRONMENT_LINUX: PATH="$PATH:$HOME/.cargo/bin"
+          CIBW_TEST_REQUIRES: pytest
+          # The test suite lives at pycrc32/tests, inside the importable package
+          # directory (which also holds __init__.py). Staging only the tests
+          # subtree keeps test_cwd's pycrc32/ from carrying an __init__.py, so
+          # it stays a harmless namespace portion and the installed wheel's
+          # concrete package wins the import (gotcha 174).
+          CIBW_TEST_SOURCES: pycrc32/tests
+          CIBW_TEST_COMMAND: >-
+            python -c "import pycrc32.pycrc32 as m; assert m.__file__.endswith('.so'), m.__file__" &&
+            python -m pytest pycrc32/tests
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: pycrc32-${{ env.PYCRC32_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish pycrc32 ${{ inputs.version || '0.3.0' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: pycrc32-${{ inputs.version || '0.3.0' }}-*-manylinux_riscv64