coveo-stew

coveo-stew is a Poetry plugin that delivers simple CI/CD tools for python using poetry as its backend.

Important

Version 4.0 Breaking Changes

Version 4.0 is a major breaking change as coveo-stew was rewritten as a Poetry plugin which required some changes to the command line interface.

If you're upgrading from a previous version, please refer to the upgrade guide.

Features

CI tools

• Config-free pytest, mypy and black runners
• Add your own linters and tools
• JUnit report generation
• GitHub Action that runs all your CI tools

Similar to: tox

CD tools

• GitHub Action for Continuous Delivery (CD) (publish to pypi)
• Automated "patch" version bumps (requires a pypi server)
• Can download locked dependencies into a folder, for offline distribution

Similar to: poetry, flit, pbr, setuptools

Multiple projects

• Support for several isolated poetry projects in one GitHub repository
• Support for local path references
• A "one ring to rule them all" virtual environment that includes all subprojects within the repository
• Batch operations

Similar to: nothing! it's unique! 😎

Prerequisites

• Poetry 2.0 or higher
• Poetry must be installed with Python 3.9 or higher

Installation

coveo-stew can be installed either as a Poetry plugin or as a standalone CLI tool.

As a Poetry plugin (recommended for CI servers)

Starting from coveo-stew version 4.0, you can install stew as a Poetry plugin.

We recommend this approach for CI servers: it's easier to inject a plugin into poetry than to install a new CLI tool into the path. Also, since poetry and stew share some common dependencies, it can translate into faster setups.

Installation depends on how you installed Poetry:

Using pipx

pipx install poetry
pipx inject poetry "coveo-stew>=4"

See the poetry documentation for more information and alternative installation methods.

As a standalone CLI tool

The main appeal of this approach is that it's shorter to type, making it a popular option for local development.

In order to install stew as a standalone CLI tool, we recommend using pipx:

pipx install coveo-stew

Note: Having both the plugin and the CLI won't cause issues.

GitHub Action

This action installs Python, Poetry, and Stew, then runs "stew ci" on your Python project.

jobs:
  stew-ci:
    runs-on: ubuntu-latest
    steps:
      - uses: coveo/stew@main
        with:
          python-version: "3.10"
          project-name: your-project-name

See additional options and documentation in the action file.

Repository Structure

Please read these guides to learn how to organize your repository for maximum compatibility:

• For a single library
• For multiple libraries

Commands

General command usage

Calling coveo-stew will depend on how you installed it:

1. As a Poetry plugin:

   poetry stew <command> [options]

2. As a standalone CLI tool:

   stew <command> [options]

Both interfaces provide identical functionality. You can choose whichever approach you prefer based on your workflow.

Unless a project name is specified, commands will operate on all projects in a git repository:

# Perform a command on all projects
poetry stew <command>
# Or using the standalone CLI
stew <command>

# Get help about a specific command
poetry stew <command> --help
# Or using the standalone CLI
stew <command> --help

Some commands allow specifying a project name:

# Run on all projects with <project-name> in their name (partial, case-insensitive)
poetry stew <command> <project-name>
# Or using the standalone CLI
stew <command> <project-name>

# Disable partial project name matching
poetry stew <command> <project-name> --exact-match
# Or using the standalone CLI
stew <command> <project-name> --exact-match

# Only consider the project at this location
poetry stew <command> .<path>
# Or using the standalone CLI
stew <command> .<path>

The remainder of the documentation will use stew <command> for brevity. Simply prefix with poetry if you installed it as a plugin.

Main Commands

stew ci

Runs all CI tools on one or multiple projects. Errors will show in the console, and JUnit XML reports will be generated inside the .ci folder.

Without configuration, this command will run:

• mypy (using opinionated, strict rules)
• poetry check
• stew check-outdated

Options:

• --fix: Reformat code if black fails
• --check <runner>: Launch only that runner (can be repeated)
• --skip <runner>: Skip that runner (takes precedence over --check, can be repeated)
• --quick: Skip running poetry install --remove-untracked before running the checks
• --extra <extra>: Install the specified extra(s) for this run (can be repeated)
• --all-extras: Install all extras for this run
• --no-extras: Don't install any extras for this run

stew build

Store the project and its locked dependencies to disk for offline installation:

stew build --target <folder>

The folder can later be installed offline with:

pip install --no-index --find-links <folder> <project-name>

Options:

• --target: Specifies where wheels should be downloaded
• --python: Target a different Python version/environment

Important: Make sure your target folder is clean before building.

Other useful commands

• stew check-outdated: Check for or update out-of-date files
• stew pull-dev-requirements: Update dev requirements in a pydev project
• stew bump: Run poetry lock on all projects
• stew refresh: Run poetry install on all projects
• stew fresh-eggs: Clear .egg-info folders (useful when changing [tool.poetry.scripts])
• stew locate <project>: Return the path to a project

Configuration

Configuration is done through the pyproject.toml file:

[tool.stew]
build-without-hashes = false  # Disable hashes when calling pip during stew build
pydev = false                 # Enable pydev mode (see multiple-libraries guide)
build-dependencies = {}       # Additional dependencies for stew build
extras = []                   # Extras to install during stew build and stew ci
all-extras = false            # Install all extras during stew build and stew ci
quick = {}                    # Controls which checks are skipped with --quick

[tool.stew.ci]
mypy = true
pytest = false
black = false
poetry-check = true
check-outdated = true
offline-build = false

# Custom runners
[tool.stew.ci.custom-runners]
flake8 = true
bandit.check-args = ["--quiet", "--recursive", "."]

[tool.stew.ci.custom-runners.isort]
check-args = ["--check", ".", "--profile", "black"]
autofix-args = [".", "--profile", "black"]

See the full documentation for stew configuration and CI runners.

FAQ and Troubleshooting

See our FAQ and Troubleshooting guide for solutions to common issues and best practices.