manageprojects - Manage Python / Django projects

Mix the idea of Ansible with CookieCutter Templates and Django Migrations to manage and update your Python Packages and Django Projects...

The main idea it to transfer changes of a CookieCutter template back to the created project. Manageprojects used git to create a patch of the template changes and applies it to the created project.

Besides this, manageprojects also includes other generic helper for Python packages:

• publish_package() - Build and upload a new release to PyPi, but with many pre-checks.
• format-file - Format/Check a Python source file with Darker & Co., useful as IDE action.

Read below the Helper section.

install

Currently just clone the project and just start the cli (that will create a virtualenv and installs every dependencies)

e.g.:

~$ git clone https://github.com/jedie/manageprojects.git
~$ cd manageprojects
~/manageprojects$ ./cli.py --help

The output of ./cli.py --help looks like:

Usage: ./cli.py [OPTIONS] COMMAND [ARGS]...

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --help      Show this message and exit.                                                          │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
╭─ Commands ───────────────────────────────────────────────────────────────────────────────────────╮
│ check-code-style            Check code style by calling darker + flake8                          │
│ clone-project               Clone existing project by replay the cookiecutter template in a new  │
│                             directory.                                                           │
│ coverage                    Run and show coverage.                                               │
│ fix-code-style              Fix code style of all manageprojects source code files via darker    │
│ format-file                 Format and check the given python source code file with              │
│                             darker/isort/pyupgrade/autopep8/mypy etc.                            │
│ install                     Run pip-sync and install 'manageprojects' via pip as editable.       │
│ mypy                        Run Mypy (configured in pyproject.toml)                              │
│ publish                     Build and upload this project to PyPi                                │
│ reverse                     Create a cookiecutter template from a managed project.               │
│ safety                      Run safety check against current requirements files                  │
│ start-project               Start a new "managed" project via a CookieCutter Template. Note: The │
│                             CookieCutter Template *must* be use git!                             │
│ test                        Run unittests                                                        │
│ tox                         Run tox                                                              │
│ update                      Update "requirements*.txt" dependencies files                        │
│ update-project              Update a existing project.                                           │
│ update-test-snapshot-files  Update all test snapshot files (by remove and recreate all snapshot  │
│                             files)                                                               │
│ version                     Print version and exit                                               │
│ wiggle                      Run wiggle to merge *.rej in given directory.                        │
│                             https://github.com/neilbrown/wiggle                                  │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

most important commands

start-project

Help from ./cli.py start-project --help Looks like:

Usage: ./cli.py start-project [OPTIONS] TEMPLATE OUTPUT_DIR

 Start a new "managed" project via a CookieCutter Template. Note: The CookieCutter Template *must*
 be use git!
 e.g.:
 ./cli.py start-project https://github.com/jedie/cookiecutter_templates/ --directory
 piptools-python ~/foobar/

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --directory             TEXT  Cookiecutter Option: Directory within repo that holds              │
│                               cookiecutter.json file for advanced repositories with multi        │
│                               templates in it                                                    │
│ --checkout              TEXT  Cookiecutter Option: branch, tag or commit to checkout after git   │
│                               clone                                                              │
│ --input/--no-input            Cookiecutter Option: Do not prompt for parameters and only use     │
│                               cookiecutter.json file content                                     │
│                               [default: input]                                                   │
│ --replay/--no-replay          Cookiecutter Option: Do not prompt for parameters and only use     │
│                               information entered previously                                     │
│                               [default: no-replay]                                               │
│ --password              TEXT  Cookiecutter Option: Password to use when extracting the           │
│                               repository                                                         │
│ --config-file           FILE  Cookiecutter Option: Optional path to "cookiecutter_config.yaml"   │
│ --help                        Show this message and exit.                                        │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

update-project

Help from ./cli.py update-project --help Looks like:

Usage: ./cli.py update-project [OPTIONS] PROJECT_PATH

 Update a existing project.
 e.g. update by overwrite (and merge changes manually via git):
 ./cli.py update-project --overwrite ~/foo/bar/

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --overwrite/--no-overwrite          Overwrite all Cookiecutter template files to the last        │
│                                     template state and do not apply the changes via git patches. │
│                                     The developer is supposed to apply the differences manually  │
│                                     via git. Will be aborted if the project git repro is not in  │
│                                     a clean state.                                               │
│                                     [default: no-overwrite]                                      │
│ --password                    TEXT  Cookiecutter Option: Password to use when extracting the     │
│                                     repository                                                   │
│ --config-file                 FILE  Cookiecutter Option: Optional path to                        │
│                                     "cookiecutter_config.yaml"                                   │
│ --input/--no-input                  Cookiecutter Option: Do not prompt for parameters and only   │
│                                     use cookiecutter.json file content                           │
│                                     [default: no-input]                                          │
│ --cleanup/--no-cleanup              Cleanup created temporary files [default: cleanup]           │
│ --help                              Show this message and exit.                                  │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

workflow

1. Create a new project

Use start-project command and a github url as Cookiecutter template, e.g.:

~/manageprojects$ ./cli.py start-project https://github.com/jedie/cookiecutter_templates/ --directory piptools-python ~/my_new_project/
~/manageprojects$ cd ~/my_new_project/your_cool_package/
~/my_new_project/your_cool_package/$ git init
~/my_new_project/your_cool_package/$ git add .
~/my_new_project/your_cool_package/$ git commit --message "my cool new project"

Note: https://github.com/jedie/cookiecutter_templates is a multi template repository, the piptools-python template is here: https://github.com/jedie/cookiecutter_templates/tree/main/piptools-python

After running the start-project command, look into the created files. Manage projects stores all needed meta information about the used Cookiecutter template into pyproject.toml, e.g.:

~/manageprojects$ cat ~/my_new_project/your_cool_package/pyproject.toml
...
[manageprojects] # https://github.com/jedie/manageprojects
initial_revision = "6e4c875"
initial_date = 2022-11-10T12:37:20+01:00
cookiecutter_template = "https://github.com/jedie/cookiecutter_templates/"
cookiecutter_directory = "piptools-python"

[manageprojects.cookiecutter_context.cookiecutter]
...

2. Update existing project

If the source Cookiecutter changed, then you can apply these changes to your created project, e.g.:

~/manageprojects$ ./cli.py update-project ~/my_new_project/your_cool_package/

After this, manageproject will update the own meta information in pyproject.toml by add applied_migrations with the information about the current Cookiecutter version, e.g.:

~/manageprojects$ cat ~/my_new_project/your_cool_package/pyproject.toml
...
[manageprojects] # https://github.com/jedie/manageprojects
initial_revision = "6e4c875"
initial_date = 2022-11-10T12:37:20+01:00
cookiecutter_template = "https://github.com/jedie/cookiecutter_templates/"
cookiecutter_directory = "piptools-python"
applied_migrations = [
    "dd69dcf", # 2022-11-22T19:48:28+01:00
]
...

How?

Everything is based on git ;)

• manageprojects knows the git hash of the used Cookiecutter Template at creation time and the current git hash.
• It builds a git patch between these two commits.
• This patch will be applied to the created project sources.

So theoretically the changes in the template are applied to the project.

However, this does not work in every case, because git can't match the changes.

See below:

drawbacks

One problem is that git can't apply all changes.

But git apply is used with --reject. It applies the parts of the patch that are applicable, and leave the rejected hunks in corresponding *.rej files.

There is a cool tool, called wiggle: https://github.com/neilbrown/wiggle

It tries to apply rejected patches by perform word-wise diffs.

Just run wiggle via manageproject CLI, e.g.:

~/manageprojects$ ./cli.py wiggle ~/my_new_project/your_cool_package/

Update by overwrite

A alternative way to update a project:

1. Just overwrite all files with the current Cookiecutter template output
2. Merge changes manually via git

So you doesn't have trouble with not applyable git patches ;)

Just add --overwrite, e.g.:

~/manageprojects$ ./cli.py update-project --overwrite ~/my_new_project/your_cool_package/

Helper

Below are some generic tools helpful for Python packages.

"reverse" - Reverse a project into a Cookiecutter template

A existing managed project can be converted back to a Cookiecutter template, e.g.:

~/manageprojects$ ./cli.py reverse ~/my_new_project/ ~/cookiecutter_template/

"format-file" - Format and check the given python source code file

You can use format-file as "Action on save" or manual action in your IDE to fix code style ;)

Usage: ./cli.py format-file [OPTIONS] FILE_PATH

 Format and check the given python source code file with darker/isort/pyupgrade/autopep8/mypy etc.
 The optional fallback values will be only used, if we can't get them from the project meta files
 like ".editorconfig" and "pyproject.toml"

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --py-version           TEXT     Fallback Python version for darker/pyupgrade, if version is not  │
│                                 defined in pyproject.toml                                        │
│                                 [default: 3.9]                                                   │
│ --max-line-length  -l  INTEGER  Fallback max. line length for darker/isort etc., if not defined  │
│                                 in .editorconfig                                                 │
│                                 [default: 119]                                                   │
│ --darker-prefixes      TEXT     Apply prefixes via autopep8 before calling darker.               │
│                                 [default: E301,E302,E303,E305,W391]                              │
│ --help                          Show this message and exit.                                      │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

publish

The manageprojects.utilities.publish.publish_package() is designed for external packages, too.

Build and upload (with twine) a project to PyPi with many pre-checks:

• Has correct version number?
• Is on main branch and up-to-date with origin?
• Check if current version already published
• Build a git tag based on current package version
• Adds change messages since last release to git tag message

Some checks result in a hard exit, but some can be manually confirmed from the user to continue publishing.

Links

• Own Cookiecutter Templates: https://github.com/jedie/cookiecutter_templates
• https://github.com/cookiecutter/cookiecutter
• Available Cookiecutters template on GitHub: https://github.com/search?q=cookiecutter&type=Repositories
• Packaging Python Projects: https://packaging.python.org/en/latest/tutorials/packaging-projects/