dm-tree: add build-dm-tree.yml for riscv64 wheels

.github/workflows/build-dm-tree.yml

@@ -0,0 +1,109 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/deepmind/tree/blob/0.1.10/.github/workflows/build.yml
+name: Build dm-tree wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'dm-tree version to build (git tag, e.g. 0.1.10)'
+        required: true
+        default: '0.1.10'
+  pull_request:
+    paths:
+      - '.github/workflows/build-dm-tree.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.1.10' }}-${{ 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 0.1.10 there.
+  DM_TREE_VERSION: ${{ inputs.version || '0.1.10' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+  # Versions tree/CMakeLists.txt's FetchContent pins at this tag; bump both in
+  # lockstep with DM_TREE_VERSION.
+  ABSEIL_VERSION: '20260107.1'
+  PYBIND11_VERSION: '3.0.1'
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build dm-tree ${{ inputs.version || '0.1.10' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 90
+    strategy:
+      fail-fast: false
+      matrix:
+        python: ["cp312", "cp313", "cp314", "cp314t"]
+
+    steps:
+      - name: Checkout tree ${{ env.DM_TREE_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: deepmind/tree
+          ref: ${{ env.DM_TREE_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: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # CMakeLists.txt statically links abseil-cpp into _tree.so via FetchContent;
+          # upstream's own wheels ship no licence for it, so pull it from the same
+          # tarball CMake fetches. pybind11 is header-only but its templates end up
+          # compiled into the same .so, so carry its licence too.
+          CIBW_BEFORE_ALL_LINUX: >-
+            mkdir -p /tmp/abseil-cpp /tmp/pybind11 &&
+            curl -sSLf "https://github.com/abseil/abseil-cpp/archive/refs/tags/${ABSEIL_VERSION}.tar.gz"
+            | tar -xz -C /tmp/abseil-cpp --strip-components=1 &&
+            curl -sSLf "https://github.com/pybind/pybind11/archive/refs/tags/v${PYBIND11_VERSION}.tar.gz"
+            | tar -xz -C /tmp/pybind11 --strip-components=1 &&
+            cp /tmp/abseil-cpp/LICENSE {project}/LICENSE.abseil-cpp &&
+            cp /tmp/pybind11/LICENSE {project}/LICENSE.pybind11
+          CIBW_ENVIRONMENT_PASS_LINUX: ABSEIL_VERSION PYBIND11_VERSION
+          CIBW_ENVIRONMENT: >-
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+            MAKEFLAGS=-j$(nproc)
+          CIBW_TEST_REQUIRES: pytest
+          CIBW_TEST_COMMAND: pytest --pyargs tree
+
+      - name: Check the extension and the licences 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("tree/_tree.") and n.endswith(".so") for n in names), whl
+              assert any(n.endswith("licenses/LICENSE") for n in names), whl
+              assert any(n.endswith("licenses/LICENSE.abseil-cpp") for n in names), whl
+              assert any(n.endswith("licenses/LICENSE.pybind11") for n in names), whl
+              print(whl, "ok")
+          EOF
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: dm-tree-${{ env.DM_TREE_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish dm-tree ${{ inputs.version || '0.1.10' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: dm-tree-${{ inputs.version || '0.1.10' }}-*-manylinux_riscv64