psygnal: add build-psygnal.yml for riscv64 wheels

.github/workflows/build-psygnal.yml

@@ -0,0 +1,97 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/pyapp-kit/psygnal/blob/v0.15.1/.github/workflows/pypi.yml
+name: Build psygnal wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'psygnal version to build (git tag without the v, e.g. 0.15.1)'
+        required: true
+        default: '0.15.1'
+  pull_request:
+    paths:
+      - '.github/workflows/build-psygnal.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.15.1' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  PSYGNAL_VERSION: ${{ inputs.version || '0.15.1' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  build_wheels:
+    name: Build psygnal ${{ inputs.version || '0.15.1' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    strategy:
+      fail-fast: false
+      matrix:
+        # mypyc emits per-interpreter (non-abi3) wheels; upstream ships no
+        # free-threaded wheel, so cp314t is out.
+        python: ["cp312", "cp313", "cp314"]
+
+    steps:
+      - name: Checkout psygnal ${{ env.PSYGNAL_VERSION }}
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
+        with:
+          repository: pyapp-kit/psygnal
+          ref: v${{ env.PSYGNAL_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: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # Upstream's uv frontend asserts a host `uv`, which the runner has not got.
+          # --no-isolation makes the mypy pin below stick.
+          CIBW_BUILD_FRONTEND: "build; args: --no-isolation"
+          # mypy 1.20 mypyc miscompiles psygnal 0.15.1: importing the wheel segfaults.
+          CIBW_BEFORE_BUILD: >-
+            pip install "hatchling>=1.8.0" hatch-vcs "hatch-mypyc>=0.13.0"
+            "mypy<1.20" "mypy_extensions>=0.4.2" "pydantic!=2.10.0" types-attrs
+            "msgspec; python_version < '3.14'"
+          # Restates upstream's [tool.cibuildwheel.environment], which this replaces.
+          # only-binary keeps the compiled deps on the registry's riscv64 wheels.
+          CIBW_ENVIRONMENT: >-
+            HATCH_BUILD_HOOKS_ENABLE=1
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+            PIP_ONLY_BINARY=numpy,pydantic-core,msgspec
+          # The mypyc hook is opt-in, and a failure to enable it yields a
+          # pure-Python wheel under a manylinux tag.
+          CIBW_TEST_COMMAND: >-
+            python -c "import psygnal; assert psygnal._compiled, 'wheel is not compiled'"
+            && pytest {project}/tests -v
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: psygnal-${{ env.PSYGNAL_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish psygnal ${{ inputs.version || '0.15.1' }} to GitLab
+    needs: [build_wheels]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Publish wheels and open docs PR
+        uses: riseproject-dev/python-wheels/actions/publish-wheels@main
+        with:
+          artifact-pattern: psygnal-${{ env.PSYGNAL_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 }}