pcodec: add build-pcodec.yml for riscv64 wheels

.github/workflows/build-pcodec.yml

@@ -0,0 +1,106 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `linux` job of
+# https://github.com/pcodec/pcodec/blob/Python_v1.0.3/.github/workflows/python_publish.yml
+name: Build pcodec wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'pcodec version to build (git tag without leading Python_v, e.g. 1.0.3)'
+        required: true
+        default: '1.0.3'
+  pull_request:
+    paths:
+      - '.github/workflows/build-pcodec.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '1.0.3' }}-${{ 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 1.0.3 there.
+  PCODEC_VERSION: ${{ inputs.version || '1.0.3' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build pcodec ${{ inputs.version || '1.0.3' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        # PyO3 extension built per-interpreter (upstream ships cp3x-cp3x wheels,
+        # no abi3).
+        python: ["cp312", "cp313", "cp314", "cp314t"]
+
+    steps:
+      # Checked out at the workspace root: pco_python is a member of pcodec's
+      # Cargo workspace and builds against its sibling pco/better_io crates.
+      - name: Checkout pcodec Python_v${{ env.PCODEC_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: pcodec/pcodec
+          ref: Python_v${{ env.PCODEC_VERSION }}
+          persist-credentials: false
+
+      - name: Stage the licence beside pco_python's pyproject.toml
+        # maturin globs LICEN[CS]E* relative to the pyproject directory, which
+        # in this monorepo is pco_python/ -- so upstream's published wheels
+        # carry no licence text at all, only the classifier.
+        run: cp LICENSE pco_python/LICENSE
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          package-dir: pco_python
+          output-dir: wheelhouse/
+          # musllinux is dropped: rustup.rs ships no riscv64 musl toolchain.
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # pco_python ships no [tool.cibuildwheel], so the Rust toolchain its
+          # maturin backend needs is installed in-container here.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          CIBW_ENVIRONMENT_LINUX: >-
+            PATH="$PATH:$HOME/.cargo/bin"
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+          # numpy is a runtime dependency; public PyPI's newest release always
+          # outranks our registry's version and has no riscv64 wheel, so pin
+          # resolution to a binary to avoid a from-source numpy build.
+          CIBW_TEST_ENVIRONMENT_LINUX: PIP_ONLY_BINARY=numpy
+          CIBW_TEST_REQUIRES: pytest
+          # test-sources resolves against the checkout root, not package-dir.
+          # pco/assets holds the .pco fixture files test_standalone.py reads
+          # via a ../../pco/assets/*.pco relative path.
+          CIBW_TEST_SOURCES: pco_python/test pco_python/README.md pco/assets
+          CIBW_TEST_COMMAND: >-
+            python -c "import pcodec.pcodec as m; assert m.__file__.endswith('.so'), m.__file__"
+            && cd pco_python && python -m pytest -v --doctest-glob=*.md test README.md
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: pcodec-${{ env.PCODEC_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish pcodec ${{ inputs.version || '1.0.3' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: pcodec-${{ inputs.version || '1.0.3' }}-*-manylinux_riscv64