CI: setup release artifacts build job and upload with trusted publishing

Author: dnicolodi

.github/workflows/release.yml

@@ -0,0 +1,46 @@
+# SPDX-FileCopyrightText: 2025 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+name: release
+on:
+  push:
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
+    pull_request:
+      branches:
+      - main
+      - release-*
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.14'
+      - run: python -m pip install build
+      - run: python -m build
+      - uses: actions/upload-artifact@v4
+        with:
+          path: dist/*
+
+  upload:
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+    environment:
+      name: pipy
+      url: https://pypi.org/p/meson-python
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          merge-multiple: true
+          path: dist
+      - uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          print-hash: true