feat: initial version

.github/workflows/ci.yml

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+---
+name: CI
+
+on:
+  pull_request:
+    branches: [master]
+    types: [opened, synchronize, reopened]
+  push:
+    branches: [master]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  pytest:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-20.04
+          - ubuntu-22.04
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Python Dependencies
+        run: |
+          python -m pip install --upgrade pip setuptools wheel
+          python -m pip install --upgrade -r requirements.txt
+          python -m pip install --upgrade -r requirements-dev.txt
+
+      - name: Test with pytest
+        id: test
+        shell: bash
+        run: |
+          python -m pytest \
+            -rxXs \
+            --tb=native \
+            --verbose \
+            --cov=action \
+            tests
+
+      - name: Upload coverage
+        # any except cancelled or skipped
+        if: >-
+          always() &&
+          (steps.test.outcome == 'success' || steps.test.outcome == 'failure') &&
+          (matrix.docker == false)
+        uses: codecov/codecov-action@v3
+        with:
+          flags: ${{ matrix.os }}
+
+  action:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-20.04
+          - ubuntu-22.04
+        set:
+          - '0'
+          - '1'
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run Action
+        id: action
+        uses: ./
+        with:
+          changelog_path: ./tests/data/set${{ matrix.set }}/CHANGELOG.md
+
+      - name: Print action outputs
+        shell: bash
+        run: |
+          echo "changelog_exists: ${{ steps.action.outputs.changelog_exists }}"
+          echo "changelog_changes: ${{ steps.action.outputs.changelog_changes }}"
+          echo "changelog_date: ${{ steps.action.outputs.changelog_date }}"
+          echo "changelog_url: ${{ steps.action.outputs.changelog_url }}"
+          echo "changelog_version: ${{ steps.action.outputs.changelog_version }}"
+          echo "changelog_release_exists: ${{ steps.action.outputs.changelog_release_exists }}"
+          echo "publish_stable_release: ${{ steps.action.outputs.publish_stable_release }}"
+          echo "release_version: ${{ steps.action.outputs.release_version }}"
+          echo "release_build: ${{ steps.action.outputs.release_build }}"
+          echo "release_tag: ${{ steps.action.outputs.release_tag }}"
+
+      - name: Verify changelog_exists
+        shell: bash
+        run: |
+          if [[ "${{ steps.action.outputs.changelog_exists }}" != "true" ]]; then
+            echo "changelog_exists is not true"
+            exit 1
+          fi
+
+      - name: Verify changelog_changes
+        shell: bash
+        run: |
+          expected_changes=$(cat ./tests/data/set${{ matrix.set }}/changes.txt)
+          if [[ "${{ steps.action.outputs.changelog_changes }}" != "{expected_changes}" ]]; then
+            echo "changelog_changes does not match expected"
+            exit 1
+          fi
+
+      - name: Verify changelog_date
+        shell: bash
+        run: |
+          expected_date=$(cat ./tests/data/set${{ matrix.set }}/date.txt)
+          if [[ "${{ steps.action.outputs.changelog_date }}" != "{expected_date}" ]]; then
+              echo "changelog_date does not match expected"
+              exit 1
+          fi
+
+      - name: Verify changelog_url
+        shell: bash
+        run: |
+          expected_url=$(cat ./tests/data/set${{ matrix.set }}/url.txt)
+          if [[ "${{ steps.action.outputs.changelog_url }}" != "{expected_url}" ]]; then
+              echo "changelog_url does not match expected"
+              exit 1
+          fi
+
+      - name: Verify changelog_version
+        shell: bash
+        run: |
+          expected_version=$(cat ./tests/data/set${{ matrix.set }}/version.txt)
+          if [[ "${{ steps.action.outputs.changelog_version }}" != "{expected_version}" ]]; then
+              echo "changelog_version does not match expected"
+              exit 1
+          fi

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+.idea/
+
+# project specific ignores
+github_*.md
+github/

Dockerfile

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+FROM python:3.12-alpine3.18 AS base
+
+RUN python -m pip install --upgrade pip setuptools wheel
+
+COPY . /app
+COPY $GITHUB_WORKSPACE /app/github/workspace
+
+WORKDIR /app
+RUN python -m pip install --upgrade -r requirements.txt
+
+CMD ["/app/action/main.py"]

action.yml

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+---
+name: "Setup Release"
+description: "Parse the changelog and setup the release parameters."
+author: "LizardByte"
+
+inputs:
+  changelog_path:
+    description: "Path to the changelog file, relative to the GitHub workspace."
+    default: "CHANGELOG.md"
+    required: false
+
+outputs:
+  changelog_changes:
+    description: "List of changes in the latest version."
+  changelog_date:
+    description: "Date of the latest version in the format: `yyyy.m.d`"
+  changelog_exists:
+    description: "Whether the changelog exists."
+  changelog_release_exists:
+    description: "Whether the release exists in GitHub."
+  changelog_url:
+    description: "URL to the latest version in the changelog."
+  changelog_version:
+    description: "Latest version in the changelog."
+  publish_stable_release:
+    description: "Whether to publish a stable release."
+  release_version:
+    description: "Version of the release to make."
+  release_build:
+    description: "Build number of the release to make."
+  release_tag:
+    description: "Tag of the release to make. e.g. `vYYYY.M.D-Build` or `vYYYY.M.D`"
+
+runs:
+  using: "docker"
+  image: "Dockerfile"