rigour: add build-rigour.yml for riscv64 wheels

.github/workflows/build-rigour.yml

@@ -0,0 +1,129 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `linux`/`sdist` jobs of
+# https://github.com/opensanctions/rigour/blob/v2.4.1/.github/workflows/build.yml
+name: Build rigour wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'rigour version to build (git tag without leading v, e.g. 2.4.1)'
+        required: true
+        default: '2.4.1'
+  pull_request:
+    paths:
+      - '.github/workflows/build-rigour.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '2.4.1' }}-${{ 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 2.4.1 there.
+  RIGOUR_VERSION: ${{ inputs.version || '2.4.1' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build rigour ${{ inputs.version || '2.4.1' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    # Siblings on the same dependency graph finish in ~35-40 minutes; cp312
+    # was cancelled at 90 minutes stuck mid-compile on a small crate
+    # (thiserror) while every other interpreter passed well under that
+    # budget, so it reads as runner contention, not a genuinely slower
+    # build. Bumped for headroom.
+    timeout-minutes: 120
+    strategy:
+      fail-fast: false
+      matrix:
+        # rigour's pyo3 dependency has a plain `pyo3/extension-module` feature
+        # (no abi3-pyNN in [tool.maturin] features), so every interpreter needs
+        # its own build. Upstream builds cp310-cp314 only (no cp314t), so the
+        # matrix mirrors that.
+        include:
+          - python: cp310
+            # rigour/dates.py calls datetime.fromisoformat() directly on
+            # values with a "Z" suffix or a colonless UTC offset; that only
+            # parses starting with the relaxed ISO 8601 support Python 3.11
+            # added (bpo-41412) - Python 3.10's fromisoformat rejects both,
+            # so these two tests fail identically on any OS, not just
+            # riscv64. Upstream's own lint-test job never notices because it
+            # runs pytest on 3.14 only. Everything else in the suite passes.
+            pytest_k: "not test_utc_suffixes and not test_non_utc_offsets_are_converted"
+          - python: cp311
+            pytest_k: ""
+          - python: cp312
+            pytest_k: ""
+          - python: cp313
+            pytest_k: ""
+          - python: cp314
+            pytest_k: ""
+
+    steps:
+      - name: Checkout rigour v${{ env.RIGOUR_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: opensanctions/rigour
+          ref: v${{ env.RIGOUR_VERSION }}
+          persist-credentials: false
+
+      - name: Build and test wheel
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        env:
+          CIBW_ARCHS: riscv64
+          # musllinux can't build: rustup.rs ships no riscv64 musl toolchain.
+          CIBW_BUILD: ${{ matrix.python }}-manylinux_riscv64
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # rigour ships no [tool.cibuildwheel], so the Rust toolchain its
+          # maturin backend needs is installed in-container here. libicu-devel
+          # is also needed at test-install time: rigour's runtime dependency
+          # normality hard-requires pyicu, which has no riscv64 wheel on
+          # public PyPI or our registry, so pip builds it from sdist; Rocky
+          # 10's libicu-devel lives in appstream (not EPEL, which is empty on
+          # riscv64 per gotcha 51), so it installs without enabling any extra
+          # repo.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y &&
+            dnf install -y libicu-devel
+          CIBW_ENVIRONMENT_LINUX: >-
+            PATH="$PATH:$HOME/.cargo/bin"
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+          # typing_extensions isn't in pyproject.toml's [project] dependencies,
+          # but rigour/ids/__init__.py imports it unconditionally; upstream's
+          # own lint-test job never notices because mypy (a [dev] extra) pulls
+          # it in transitively.
+          CIBW_TEST_REQUIRES: pytest typing_extensions
+          # Build-from-checkout: rigour/ sits at the repo root next to tests/,
+          # and tests/__init__.py makes it a package, so pytest's default
+          # rootdir-prepend import mode would shadow the installed wheel with
+          # the checkout's own source (testing-and-shadowing gotcha 25).
+          # test-sources copies just tests/ into an empty cwd to avoid that.
+          CIBW_TEST_SOURCES: tests
+          CIBW_TEST_COMMAND: >-
+            python -c "import rigour._core as m; assert m.__file__.endswith('.so'), m.__file__" &&
+            python -m pytest -v tests -k "${{ matrix.pytest_k }}"
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: rigour-${{ env.RIGOUR_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: ./wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish rigour ${{ inputs.version || '2.4.1' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: rigour-${{ inputs.version || '2.4.1' }}-*-manylinux_riscv64