tree-sitter-ruby: add build-tree-sitter-ruby.yml for riscv64 wheels

* Package: tree-sitter-ruby
* Version: 0.23.1
* Source: https://github.com/tree-sitter/tree-sitter-ruby
* Docs: https://github.com/tree-sitter/tree-sitter-ruby

Compiles the Ruby tree-sitter grammar's parser and external scanner
into the _binding extension. Upstream publishes no riscv64 wheel.

Mirrors upstream's package-pypi.yml, same shape as the already-merged
build-tree-sitter-java.yml / build-tree-sitter-cpp.yml /
build-tree-sitter-rust.yml.

Author: luhenry

.github/workflows/build-tree-sitter-ruby.yml

@@ -0,0 +1,71 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# Based on upstream's wheel builder:
+#   https://github.com/tree-sitter/workflows/blob/main/.github/workflows/package-pypi.yml
+name: Build tree-sitter-ruby wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'tree-sitter-ruby version to build (git tag without leading v, e.g. 0.23.1)'
+        required: true
+        default: '0.23.1'
+  pull_request:
+    paths:
+      - '.github/workflows/build-tree-sitter-ruby.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.23.1' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  TREE_SITTER_RUBY_VERSION: ${{ inputs.version || '0.23.1' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build tree-sitter-ruby ${{ inputs.version || '0.23.1' }} cp39-abi3-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 120
+
+    steps:
+      - name: Checkout tree-sitter-ruby v${{ env.TREE_SITTER_RUBY_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: tree-sitter/tree-sitter-ruby
+          ref: v${{ env.TREE_SITTER_RUBY_VERSION }}
+          persist-credentials: false
+
+      - uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        env:
+          CIBW_ARCHS: riscv64
+          CIBW_BUILD: cp312-manylinux_riscv64 cp313-manylinux_riscv64 cp314-manylinux_riscv64
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          CIBW_TEST_EXTRAS: core
+          CIBW_TEST_SOURCES: bindings/python/tests
+          CIBW_TEST_COMMAND: python -m unittest discover -v -s bindings/python/tests
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: tree-sitter-ruby-${{ env.TREE_SITTER_RUBY_VERSION }}-cp39-abi3-manylinux_riscv64
+          path: ./wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish tree-sitter-ruby ${{ inputs.version || '0.23.1' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: tree-sitter-ruby-${{ inputs.version || '0.23.1' }}-*-manylinux_riscv64