Add CI workflow for publishing releases

.github/bin/check-version.sh

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+#!/usr/bin/env bash
+# This file is part of indico-patcher.
+# Copyright (C) 2023 UNCONVENTIONAL
+
+set -e
+
+# Fail if the tag version is not passed
+if [ -z "$1" ]; then
+    echo "::error::No tag version passed."
+    exit 1
+fi
+
+# Get the tag version from the argument
+TAG_VERSION=$1
+
+# Get the version from pyproject.toml
+PROJECT_VERSION="$(grep 'version =' pyproject.toml | cut -d '"' -f 2)"
+
+# Check if the tag version matches the project version
+if [ "${TAG_VERSION}" != "${PROJECT_VERSION}" ]; then
+    echo "::error::Tag version ${TAG_VERSION} doesn't match project version ${PROJECT_VERSION}."
+    exit 1
+fi

.github/bin/extract-changelog.py

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+#!/usr/bin/env python
+# This file is part of indico-patcher.
+# Copyright (C) UNCONVENTIONAL
+
+import re
+import sys
+from pathlib import Path
+
+CHANGELOG_FILENAME = "CHANGELOG.md"
+
+
+def extract_section(version):
+    path = Path(CHANGELOG_FILENAME)
+    text = path.read_text()
+
+    # Check that the changelog contains a section for the given version
+    re_start = rf"^## ({re.escape(version)})(.*)$"
+    if not (match := re.search(re_start, text, re.MULTILINE)):
+        print(f"::error::Version {version} not found in {CHANGELOG_FILENAME}.")
+        sys.exit(1)
+
+    # Check that the given version is not marked as unreleased
+    if "unreleased" in match.group(2).lower():
+        print(f"::error::Version {version} is marked as unreleased in {CHANGELOG_FILENAME}.")
+        sys.exit(1)
+
+    # Extract the changes for the given version
+    re_end = r"^## (.*)$"
+    text = text[match.end(0):]
+    if match := re.search(re_end, text, re.MULTILINE):
+        text = text[:match.start()]
+
+    return text.strip()
+
+
+def main():
+    version = sys.argv[1]
+    out_path = None
+    if len(sys.argv) > 2:
+        out_path = Path(sys.argv[2])
+    changelog = extract_section(version)
+    if not out_path:
+        print(changelog)
+        return
+    out_path.write_text(changelog)
+    print(f"Changelog for {version} written to {out_path}.")
+
+
+if __name__ == "__main__":
+    main()

.github/workflows/releasing.yaml

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+name: releasing
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  check:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Check tag version
+        run: |
+          .github/bin/check-version.sh "${GITHUB_REF#refs/tags/v}"
+
+  build:
+    needs: check
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install poetry
+        run: |
+          pipx install poetry
+      - name: Build package
+        run: |
+          poetry build
+      - name: Extract changelog
+        run: |
+          .github/bin/extract-changelog.py ${{ github.ref_name }} /tmp/changelog.md
+      - uses: actions/upload-artifact@v3
+        name: Upload build artifacts
+        with:
+          name: wheel
+          retention-days: 7
+          path: ./dist/*.whl
+      - uses: actions/upload-artifact@v3
+        name: Upload changelog
+        with:
+          name: changelog
+          retention-days: 7
+          path: /tmp/changelog.md
+
+  release:
+    needs: build
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/download-artifact@v3
+      - name: Draft release
+        run: >-
+          gh release create
+          --draft
+          --repo ${{ github.repository }}
+          --title ${{ github.ref_name }}
+          --notes-file changelog/changelog.md
+          ${{ github.ref_name }}
+          wheel/*
+        env:
+          GH_TOKEN: ${{ github.token }}
+
+  publish:
+    needs: release
+    environment:
+      name: pypi
+      url: https://pypi.org/project/indico-patcher/
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: write
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v3
+      - name: Publish package to Test PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/
+          packages-dir: wheel/
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          packages-dir: wheel/
+      - name: Publish release
+        run: >-
+          gh release edit
+          --draft=false
+          --repo ${{ github.repository }}
+          ${{ github.ref_name }}
+        env:
+          GH_TOKEN: ${{ github.token }}