Add Python application base structure

JIRA: RHELWF-10973

.github/dependabot.yml

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+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "monthly"

.github/workflows/gating.yaml

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+---
+name: Gating
+
+"on":
+  pull_request:
+  push:
+  workflow_dispatch:
+    inputs: {}
+
+jobs:
+  tests:
+    name: Unit tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.12"
+
+      - name: Install dependencies
+        run: python -m pip install tox
+
+      - name: Test with tox
+        run: python -m tox -e py3
+
+      - name: Run coveralls-python
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COVERALLS_FLAG_NAME: python-${{ matrix.python-version }}
+          COVERALLS_PARALLEL: true
+        run: |
+          pip3 install --upgrade pip
+          pip3 install --upgrade setuptools
+          pip3 install --upgrade coveralls==3.2.0
+          coveralls --service=github
+
+  coveralls-finish:
+    name: Finish coveralls-python
+    needs: tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Finished
+        run: |
+          pip3 install --upgrade pip
+          pip3 install --upgrade setuptools
+          pip3 install --upgrade coveralls
+          coveralls --finish --service=github
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  linters:
+    name: Linters
+    strategy:
+      matrix:
+        tox_env:
+          - mypy
+          - semgrep
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.12"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install tox
+
+      - name: Test '${{ matrix.tox_env }}' with tox
+        run: tox -e ${{ matrix.tox_env }}
+
+  hadolint:
+    name: Hadolint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: hadolint/[email protected]
+        with:
+          dockerfile: Containerfile
+          # Ignore list:
+          # * DL3041 - Specify version with dnf install -y <package>-<version>
+          ignore: DL3041
+          failure-threshold: warning

.gitignore

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+/.coverage
+/coverage.xml
+/htmlcov
+/.mypy_cache
+/.ruff_cache
+/.tox

.pre-commit-config.yaml

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+---
+ci:
+  autoupdate_schedule: monthly
+  skip:
+    - hadolint-docker
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.6.0
+    hooks:
+      - id: check-merge-conflict
+      - id: check-yaml
+      - id: debug-statements
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+
+  # Sort imports
+  - repo: https://github.com/pycqa/isort
+    rev: 5.13.2
+    hooks:
+      - id: isort
+        name: isort
+        args:
+          - --line-length=79
+          - --profile=black
+
+  # Remove unused imports, variables, statements
+  - repo: https://github.com/PyCQA/autoflake
+    rev: v2.3.1
+    hooks:
+      - id: autoflake
+
+  # Auto-update syntax
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.15.2
+    hooks:
+      - id: pyupgrade
+        args:
+          - --py311-plus
+
+  # Linter and formatter
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.4.2
+    hooks:
+      - id: ruff
+        args:
+          # ignore: E501 Line too long
+          - --ignore=E501
+      - id: ruff-format
+
+  # Linter and formatter
+  - repo: https://github.com/Instagram/Fixit
+    rev: v2.1.0
+    hooks:
+      - id: fixit-fix
+
+  # Security linter
+  - repo: https://github.com/pycqa/bandit
+    rev: 1.7.8
+    hooks:
+      - id: bandit
+        name: bandit
+        exclude: tests/
+
+  # Dockerfile linter
+  - repo: https://github.com/hadolint/hadolint
+    rev: v2.13.0-beta
+    hooks:
+      - id: hadolint-docker
+
+  # Fix common misspellings
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.2.6
+    hooks:
+      - id: codespell

CODEOWNERS

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+* @release-engineering/retasc-owners

Containerfile

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+FROM registry.fedoraproject.org/fedora:39 as builder
+
+# hadolint ignore=DL3033,DL4006,SC2039,SC3040
+RUN set -exo pipefail \
+    && mkdir -p /mnt/rootfs \
+    # install builder dependencies
+    && yum install -y \
+        --setopt install_weak_deps=false \
+        --nodocs \
+        --disablerepo=* \
+        --enablerepo=fedora,updates \
+        gcc \
+        python3 \
+        python3-devel \
+    # install runtime dependencies
+    && yum install -y \
+        --installroot=/mnt/rootfs \
+        --releasever=/ \
+        --setopt install_weak_deps=false \
+        --nodocs \
+        --disablerepo=* \
+        --enablerepo=fedora,updates \
+        python3 \
+    && yum --installroot=/mnt/rootfs clean all \
+    && rm -rf /mnt/rootfs/var/cache/* /mnt/rootfs/var/log/dnf* /mnt/rootfs/var/log/yum.* \
+    # https://python-poetry.org/docs/master/#installing-with-the-official-installer
+    && curl -sSL https://install.python-poetry.org | python3 - \
+    && python3 -m venv /venv
+
+ENV \
+    PIP_DEFAULT_TIMEOUT=100 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PYTHONFAULTHANDLER=1 \
+    PYTHONHASHSEED=random \
+    PYTHONUNBUFFERED=1
+
+WORKDIR /build
+COPY . .
+# hadolint ignore=SC1091
+RUN set -ex \
+    && export PATH=/root/.local/bin:$PATH \
+    && . /venv/bin/activate \
+    && pip install --no-cache-dir -r requirements.txt \
+    && poetry build --format=wheel \
+    && version=$(poetry version --short) \
+    && pip install --no-cache-dir dist/retasc-"$version"-py3*.whl \
+    && deactivate \
+    && mv /venv /mnt/rootfs \
+    && mkdir -p /mnt/rootfs/src/container \
+    && cp -v container/entrypoint.sh /mnt/rootfs/src/container
+
+# --- Final image
+FROM scratch
+ARG GITHUB_SHA
+ARG EXPIRES_AFTER
+LABEL \
+    name="retasc" \
+    vendor="ReTaSC developers" \
+    summary="Release Task Schedule Curator (ReTaSC)" \
+    description="App for planning product release work in Jira based on schedules in Product Pages" \
+    maintainer="Red Hat, Inc." \
+    license="GPLv3+" \
+    url="https://github.com/release-engineering/retasc" \
+    vcs-type="git" \
+    vcs-ref=$GITHUB_SHA \
+    io.k8s.display-name="ReTaSC" \
+    quay.expires-after=$EXPIRES_AFTER
+
+ENV \
+    PYTHONFAULTHANDLER=1 \
+    PYTHONHASHSEED=random \
+    PYTHONUNBUFFERED=1 \
+    WEB_CONCURRENCY=8
+
+COPY --from=builder /mnt/rootfs/ /
+COPY --from=builder \
+    /etc/yum.repos.d/fedora.repo \
+    /etc/yum.repos.d/fedora-updates.repo \
+    /etc/yum.repos.d/
+WORKDIR /src
+
+USER 1001
+EXPOSE 8080
+
+# Validate virtual environment
+RUN /src/container/entrypoint.sh python -c \
+      'from retasc import __version__; print(__version__)' \
+    && /src/container/entrypoint.sh retasc --version \
+    && /src/container/entrypoint.sh retasc --help
+
+ENTRYPOINT ["/src/container/entrypoint.sh"]
+CMD ["retasc", "--help"]

README.md

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+[![Coverage Status](https://coveralls.io/repos/github/release-engineering/retasc/badge.svg?branch=main)](https://coveralls.io/github/release-engineering/retasc?branch=main)
+
+# Release Task Schedule Curator (ReTaSC)
+
+ReTaSC is an app that plans product release work in Jira based on schedules in
+Product Pages (PP).
+
+## Introduction
+
+ReTaSC is meant to run as a batch job regularly to monitor schedules in PP and
+create or update Jira issues according to custom rules and Jira templates.
+
+ReTaSC manages the Jira issues it creates until resolved. This means that if a
+PP schedule or a rule changes, the related unresolved Jira issues are also
+updated or even closed.
+
+## Tasks and Rules
+
+Tasks are objects managed by ReTaSC. Each Task is related to a specific Rule
+and a Product Release (an identifier in PP).
+
+Rules describe how to manage related tasks using:
+
+- Prerequisites - PP schedule item name with number of days before/after the
+  date, and list of other dependent Rules
+- Jira issue templates
+- Definition of Done (DoD) - currently, the only supported DoD is: "related
+  Jira issues have been resolved"
+
+Task state can be one of:
+
+- Missing (PP schedule is not defined yet)
+- Pending (some prerequisites and not satisfied)
+- In-progress (prerequisites are satisfied and DoD is not)
+- Completed (prerequisites and DoD is satisfied)
+
+## Environment Variables
+
+Below is list of environment variables supported in the container image:
+
+- `RETASC_LOGGING_CONFIG` - Path to JSON file with the logging configuration;
+  see details in [Configuration dictionary
+  schema](https://docs.python.org/3/library/logging.config.html#logging-config-dictschema)
+- `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT` - OpenTelemetry exporter endpoint; if
+  unset (default), traces are not exported; for example:
+  `https://jaeger.example.com:4318/v1/traces`
+- `OTEL_EXPORTER_SERVICE_NAME` - service name for OpenTelemetry; if unset
+  (default), traces are not exported
+
+## Development
+
+This section lists useful commands to help with ReTaSC development.
+
+Install pre-commit locally:
+
+```
+pre-commit install
+```
+
+Creating a new commit or amending an existing commit may cause the pre-commit
+to fail. In many cases pre-commit automatically fixes formatting and you can
+run the command again:
+
+```
+> git commit --ammend --no-edit
+...
+autoflake................................................................Failed
+- hook id: autoflake
+- files were modified by this hook
+...
+
+> git commit --ammend --no-edit
+...
+autoflake................................................................Passed
+...
+```
+
+Run tests and additional linters:
+
+```
+tox
+```
+
+Inspect specific test failure:
+
+```
+tox -e py3 -- --no-cov -lvvvvsxk test_init_tracing_with_valid_config
+```
+
+Install and run the app to virtualenv with [Poetry]:
+
+```
+poetry install
+poetry run retasc --help
+```
+
+Clean up the virtualenv (can be useful after larger host system updates):
+
+```
+poetry env remove --all
+```
+
+[Poetry]: https://python-poetry.org/docs/

container/entrypoint.sh

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+#!/bin/bash
+set -e
+
+. /venv/bin/activate
+exec "$@"