From d0c279dc3643f8d1402e585e255fb119d0e419d6 Mon Sep 17 00:00:00 2001
From: Ludovic Henry <git@ludovic.dev>
Date: Mon, 7 Sep 2026 06:41:13 +0200
Subject: [PATCH] libscrc: add build-libscrc.yml for riscv64 wheels

Pure-C CRC3-CRC82 checksum library, no build backend beyond setuptools
and no abi3 (extensions bind the full C API), so every interpreter
gets its own build. Building from the upstream checkout (not the PyPI
sdist, which omits LICENSE) picks up the GPLv3 LICENSE file for
setuptools' automatic dist-info inclusion. Test command extends
upstream's own CI (which only exercises libscrc.test.crc16) to every
test module the package ships.
---
 .github/workflows/build-libscrc.yml | 90 +++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 .github/workflows/build-libscrc.yml

diff --git a/.github/workflows/build-libscrc.yml b/.github/workflows/build-libscrc.yml
new file mode 100644
index 000000000..cefaa5ac0
--- /dev/null
+++ b/.github/workflows/build-libscrc.yml
@@ -0,0 +1,90 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/hex-in/libscrc/blob/v1.8.1/.github/workflows/pythonpackage.yml
+name: Build libscrc wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'libscrc version to build (git tag without leading v, e.g. 1.8.1)'
+        required: true
+        default: '1.8.1'
+  pull_request:
+    paths:
+      - '.github/workflows/build-libscrc.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '1.8.1' }}-${{ 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 1.8.1 there.
+  LIBSCRC_VERSION: ${{ inputs.version || '1.8.1' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+  MUSLLINUX_RISCV64_IMAGE: quay.io/pypa/musllinux_1_2_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build libscrc ${{ inputs.version || '1.8.1' }} ${{ matrix.python }}-${{ matrix.libc }}_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        # Per-interpreter (not abi3): the extensions link the full C API.
+        python: ["cp312", "cp313", "cp314", "cp314t"]
+        libc: [manylinux, musllinux]
+
+    steps:
+      - name: Checkout libscrc v${{ env.LIBSCRC_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: hex-in/libscrc
+          ref: v${{ env.LIBSCRC_VERSION }}
+          persist-credentials: false
+
+      - uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        env:
+          CIBW_ARCHS: riscv64
+          CIBW_BUILD: ${{ matrix.python }}-${{ matrix.libc }}_riscv64
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          CIBW_MUSLLINUX_RISCV64_IMAGE: ${{ env.MUSLLINUX_RISCV64_IMAGE }}
+          # Mirror upstream's own CI (build + `python -m libscrc.test.crc16`),
+          # extended to every test module upstream ships (only crc16 is wired
+          # into pythonpackage.yml).
+          CIBW_TEST_COMMAND: >-
+            python -c "import libscrc._crc16 as m; assert m.__file__.endswith('.so'), m.__file__" &&
+            python -m libscrc.test.canx &&
+            python -m libscrc.test.crc8 &&
+            python -m libscrc.test.crc16 &&
+            python -m libscrc.test.crc24 &&
+            python -m libscrc.test.crc32 &&
+            python -m libscrc.test.crc64 &&
+            python -m libscrc.test.crcx &&
+            python -m libscrc.test.hacker &&
+            python -m libscrc.test.modbus
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: libscrc-${{ env.LIBSCRC_VERSION }}-${{ matrix.python }}-${{ matrix.libc }}_riscv64
+          path: ./wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish libscrc ${{ inputs.version || '1.8.1' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: libscrc-${{ inputs.version || '1.8.1' }}-*riscv64