From cd6ffa51713a82e74f89ac6197e0974f4c384cac Mon Sep 17 00:00:00 2001
From: Ludovic Henry <git@ludovic.dev>
Date: Thu, 27 Aug 2026 04:35:56 +0200
Subject: [PATCH] blis: add build-blis.yml for riscv64 wheels
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

cython-blis compiles the vendored BLIS sources listed in a pregenerated
blis/_src/make/<platform>-<arch>.jsonl. setup.py's get_arch_name() already
maps any Linux machine that is not x86_64/aarch64/ppc64le to the portable
`generic` config, whose 297 compile specs carry only -O3/-fPIC/-std=c99 and
no arch-specific flags, sources or intrinsics — so riscv64 needs no BLIS_ARCH
override and no patch.

Mirrors upstream's cibuildwheel.yml, narrowed to manylinux_riscv64, plus the
test invocation from their separate tests.yml (install the wheel, run the
suite that ships inside it via `pytest --pyargs blis -Werror`). Free-threaded
builds are excluded because upstream's [tool.cibuildwheel] skips `cp3??t-*`
and PyPI carries no cp3XXt wheel.

Validated locally in quay.io/pypa/manylinux_2_39_aarch64 with
BLIS_ARCH=generic: the wheel builds, carries both blis.cy/blis.py extensions
and dist-info/licenses/LICENSE, and the suite passes.
---
 .github/workflows/build-blis.yml | 100 +++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 .github/workflows/build-blis.yml

diff --git a/.github/workflows/build-blis.yml b/.github/workflows/build-blis.yml
new file mode 100644
index 000000000..3ddf9d1ed
--- /dev/null
+++ b/.github/workflows/build-blis.yml
@@ -0,0 +1,100 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/explosion/cython-blis/blob/release-v1.3.3/.github/workflows/cibuildwheel.yml
+name: Build blis wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'blis version to build (e.g. 1.3.3)'
+        required: true
+        default: '1.3.3'
+  pull_request:
+    paths:
+      - '.github/workflows/build-blis.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '1.3.3' }}-${{ 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 1.3.3 there.
+  BLIS_VERSION: ${{ inputs.version || '1.3.3' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  build_wheels:
+    name: Build blis ${{ inputs.version || '1.3.3' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 360
+    strategy:
+      fail-fast: false
+      matrix:
+        # Upstream's [tool.cibuildwheel] skips `cp3??t-*`, so no free-threaded build.
+        python:
+          - "cp312"
+          - "cp313"
+          - "cp314"
+
+    steps:
+      - name: Checkout cython-blis ${{ env.BLIS_VERSION }}
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
+        with:
+          repository: explosion/cython-blis
+          ref: release-v${{ env.BLIS_VERSION }}
+          persist-credentials: false
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # setup.py's get_arch_name() already picks the portable `generic` BLIS
+          # config for any Linux machine that is not x86_64/aarch64/ppc64le.
+          CIBW_ENVIRONMENT: PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+          # Upstream tests in a separate workflow (tests.yml), which installs the
+          # wheel, deletes the source tree and runs the suite shipped inside it.
+          CIBW_TEST_REQUIRES: pytest hypothesis>=4.0.0,<7.0.0
+          CIBW_TEST_COMMAND: python -m pytest --pyargs blis -Werror
+
+      - name: Check the compiled extensions made it into the wheel
+        run: |
+          python3 - wheelhouse/*.whl <<'EOF'
+          import sys, zipfile
+          for whl in sys.argv[1:]:
+              names = zipfile.ZipFile(whl).namelist()
+              got = {n for n in names if n.endswith(".so")}
+              assert len(got) == 2, f"expected blis.cy and blis.py extensions in {whl}, got {got}"
+              print(whl, sorted(got))
+          EOF
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: blis-${{ env.BLIS_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish blis ${{ inputs.version || '1.3.3' }} to GitLab
+    needs: [build_wheels]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Publish wheels and open docs PR
+        uses: riseproject-dev/python-wheels/actions/publish-wheels@main
+        with:
+          artifact-pattern: blis-${{ env.BLIS_VERSION }}-*-manylinux_riscv64
+          gitlab-username: ${{ vars.GITLAB_DEPLOY_USER }}
+          gitlab-token: ${{ secrets.GITLAB_DEPLOY_TOKEN }}
+          gitlab-project-id: ${{ vars.GITLAB_PROJECT_ID }}
+          gh-token: ${{ secrets.GITHUB_TOKEN }}