numpy-minmax: add build-numpy-minmax.yml for riscv64 wheels (#1451)

* **Package**: `numpy-minmax`
* **Version**: `0.6.0`
* **Source**: https://github.com/nomonosound/numpy-minmax
* **Docs**: https://github.com/nomonosound/numpy-minmax

Compiles a cffi C extension for fast min/max on NumPy arrays. Upstream publishes no riscv64 wheel.

Mirrors [upstream's `build.yml`](https://github.com/nomonosound/numpy-minmax/blob/0.6.0/.github/workflows/build.yml).

**Differs from upstream**
- Dropped Windows/macOS/pypy, kept Linux glibc - riscv64 only
- Added `PIP_ONLY_BINARY=numpy` - numpy is only on our registry for riscv64

**Testing**
- same as upstream

**License**: OK

Author: luhenry

.github/workflows/build-numpy-minmax.yml

@@ -0,0 +1,86 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/nomonosound/numpy-minmax/blob/0.6.0/.github/workflows/build.yml
+name: Build numpy-minmax wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'numpy-minmax version to build (git tag, e.g. 0.6.0)'
+        required: true
+        default: '0.6.0'
+  pull_request:
+    paths:
+      - '.github/workflows/build-numpy-minmax.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.6.0' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  NUMPY_MINMAX_VERSION: ${{ inputs.version || '0.6.0' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build numpy-minmax ${{ inputs.version || '0.6.0' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        # Per-interpreter (not abi3): the cffi extension links the version-specific ABI.
+        python:
+          - "cp312"
+          - "cp313"
+          - "cp314"
+          - "cp314t"
+
+    steps:
+      - name: Checkout numpy-minmax ${{ env.NUMPY_MINMAX_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: nomonosound/numpy-minmax
+          ref: ${{ env.NUMPY_MINMAX_VERSION }}
+          fetch-depth: 0  # setuptools_scm derives the version from git tags
+          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: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # numpy is both a build (test) and runtime requirement, and only our registry
+          # has it for riscv64; only-binary keeps a newer PyPI release from winning the
+          # resolution and then compiling from sdist.
+          CIBW_ENVIRONMENT: >-
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+            PIP_ONLY_BINARY=numpy
+
+      - name: Store wheels
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: numpy-minmax-${{ env.NUMPY_MINMAX_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: ./wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish numpy-minmax ${{ inputs.version || '0.6.0' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: numpy-minmax-${{ inputs.version || '0.6.0' }}-*-manylinux_riscv64