intbitset: add build-intbitset.yml for riscv64 wheels

.github/workflows/build-intbitset.yml

@@ -0,0 +1,98 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `build_wheels` job of
+# https://github.com/inveniosoftware-contrib/intbitset/blob/v4.1.2/.github/workflows/test-and-build.yml
+name: Build intbitset wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'intbitset version to build (git tag, e.g. v4.1.2)'
+        required: true
+        default: 'v4.1.2'
+  pull_request:
+    paths:
+      - '.github/workflows/build-intbitset.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || 'v4.1.2' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  INTBITSET_VERSION: ${{ inputs.version || 'v4.1.2' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build intbitset ${{ inputs.version || 'v4.1.2' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    strategy:
+      fail-fast: false
+      matrix:
+        python:
+          - "cp312"
+          - "cp313"
+          - "cp314"
+          - "cp314t"
+
+    steps:
+      - name: Checkout intbitset ${{ env.INTBITSET_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: inveniosoftware-contrib/intbitset
+          ref: ${{ env.INTBITSET_VERSION }}
+          persist-credentials: false
+
+      - name: Checkout python-wheels
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          path: python-wheels
+          persist-credentials: false
+
+      - name: Patch intbitset source
+        run: git apply python-wheels/patches/intbitset/${{ env.INTBITSET_VERSION }}/00*.patch
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          CIBW_TEST_REQUIRES: pytest pytest-xdist
+          CIBW_TEST_COMMAND: pytest {package}/tests -n4
+
+      - name: Check the C extension made it into the wheel
+        run: |
+          python3 - wheelhouse/*.whl <<'EOF'
+          import sys, zipfile
+          for whl in sys.argv[1:]:
+              names = zipfile.ZipFile(whl).namelist()
+              assert any(n.startswith("intbitset.") and n.endswith(".so") for n in names), (whl, names)
+              print(whl, "ok")
+          EOF
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: intbitset-${{ env.INTBITSET_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish intbitset ${{ inputs.version || 'v4.1.2' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: intbitset-${{ inputs.version || 'v4.1.2' }}-*-manylinux_riscv64

patches/intbitset/v4.1.2/0001-test_set_consistency-compare-fastdump-by-decompresse.patch

@@ -0,0 +1,45 @@
+From 8faa680140e0824c716c234b1e1401d85cd49579 Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Mon, 7 Sep 2026 14:18:17 +0200
+Subject: [PATCH] test_set_consistency: compare fastdump() by decompressed
+ content, not exact zlib bytes
+
+fastdump() zlib-compresses intbitset's internal representation via the
+stdlib zlib module (intbitset.pyx: return zlib.compress(tmp)), and
+test_set_consistency hardcodes the exact compressed byte string it expects
+back. deflate does not guarantee identical output across zlib builds - only
+that decompressing it recovers the original bytes - so the test is only
+stable on whatever zlib build produced the fixture data. manylinux_riscv64
+(quay.io/pypa/manylinux_2_39_riscv64) links zlib-ng-compat, which compresses
+this input to a functionally identical but byte-different stream, failing
+the raw equality on every interpreter (cp313/cp314/cp314t all hit the same
+single assertion, 13929/13930 tests otherwise passing).
+
+Comparing zlib.decompress() of both sides keeps the real check - that
+fastdump()'s output decodes back to the expected uncompressed
+representation - without assuming a specific zlib build's compression
+output. intbitset1 == intbitset3 and intbitset2 == intbitset4 (parsing the
+same hardcoded dumped bytes back into a set) already cover fastload()'s
+correctness independently.
+
+Upstream-Status: To upstream [not submitted from this automated port run; needs a pull request against inveniosoftware-contrib/intbitset]
+---
+ tests/test_intbitset.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/tests/test_intbitset.py b/tests/test_intbitset.py
+index 6418b38..c44b0b8 100644
+--- a/tests/test_intbitset.py
++++ b/tests/test_intbitset.py
+@@ -762,9 +762,9 @@ def test_set_consistency(original, dumped, dumped_trailing_bits):
+     check_bitset(intbitset3)
+     check_bitset(intbitset4)
+
+-    assert intbitset1.fastdump() == dumped
++    assert zlib.decompress(intbitset1.fastdump()) == zlib.decompress(dumped)
+     assert intbitset1 == intbitset3
+-    assert intbitset2.fastdump() == dumped_trailing_bits
++    assert zlib.decompress(intbitset2.fastdump()) == zlib.decompress(dumped_trailing_bits)
+     assert intbitset2 == intbitset4
+
+