dephell 0.7.1

Installation

The simplest way:

python3 -m pip install --user dephell[full]

See installation documentation for better ways.

Supported formats

1. Archives:

   1. *.egg-info (egginfo)

   2. *.tar.gz (sdist)

   3. *.whl (wheel)

2. pip:

   1. requirements.txt (pip)

   2. requirements.lock (piplock)

3. pipenv:

   1. Pipfile (pipfile)

   2. Pipfile.lock (pipfilelock)

4. pоetry:

   1. pyproject.toml (poetry)

   2. poetry.lock (poetrylock)

5. Other:

   1. setup.py (setuppy) 1.conda‘s environment.yml (conda)

   2. pyproject.toml build-system requires (pyproject)

   3. Installed packages (installed).

Usage

First of all, install DepHell and activate autocomplete:

python3 -m pip install --user dephell[full]
dephell autocomplete

Let’s get sampleproject and make it better.

git clone https://github.com/pypa/sampleproject.git
cd sampleproject

This project uses setup.py for dependencies and metainfo. However, this format is over-complicated for most projects. Let’s convert it into poetry:

dephell deps convert --from=setup.py --to=pyproject.toml

It will make next pyproject.toml:

[tool.poetry]
name = "sampleproject"
version = "1.2.0"
description = "A sample Python project"
authors = ["The Python Packaging Authority <pypa-dev@googlegroups.com>"]
readme = "README.md"

[tool.poetry.scripts]
sample = "sample:main"

[tool.poetry.dependencies]
python = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,<4,>=2.7"
coverage = {optional = true}
peppercorn = "*"

[tool.poetry.dev-dependencies]
check-manifest = "*"

[tool.poetry.extras]
test = ["coverage"]

Now, let’s generate some useful files:

dephell generate authors

dephell generate license MIT

# https://editorconfig.org/
dephell generate editorconfig

Our users probably have not installed poetry, but they are likely to have pip and can install files from setup.py. Let’s make it easier to generate setup.py from our pyproject.toml. Also, it points to DepHell as your default dependencies file. Add the following lines in the pyproject.toml:

[tool.dephell.main]
from = {format = "poetry", path = "pyproject.toml"}
to = {format = "setuppy", path = "setup.py"}

You can see a full, real-world example of a config in DepHell’s own pyproject.toml.

Now we can call DepHell commands without explicitly specifying from and to:

dephell deps convert

It will make setup.py and README.rst from pyproject.toml and README.md.

Now let’s test our code in a virtual environment:

$ dephell venv run pytest
WARNING venv does not exist, creating... (project=/home/gram/Documents/sampleproject, env=main, path=/home/gram/.local/share/dephell/venvs/sampleproject-Whg0/main)
INFO venv created (path=/home/gram/.local/share/dephell/venvs/sampleproject-Whg0/main)
WARNING executable does not found in venv, trying to install... (executable=pytest)
INFO build dependencies graph...
INFO installation...
# ... pip output
# ... pytest output

We can now activate the virtual environment for our project and run any commands inside:

dephell venv shell

Ugh, we have tests, but don’t have pytest in our dependencies file. Let’s add it:

dephell deps add --envs dev test -- pytest

Afer that our dev-dependencies looks like this:

[tool.poetry.dev-dependencies]
check-manifest = "*"
pytest = "*"

[tool.poetry.extras]
test = ["coverage", "pytest"]

Eventually we will have many more dependencies. Let’s look at how many of them we have now:

$ dephell deps tree
- check-manifest [required: *, locked: 0.37, latest: 0.37]
- coverage [required: *, locked: 4.5.3, latest: 4.5.3]
- peppercorn [required: *, locked: 0.6, latest: 0.6]
- pytest [required: *, locked: 4.4.0, latest: 4.4.0]
  - atomicwrites [required: >=1.0, locked: 1.3.0, latest: 1.3.0]
  - attrs [required: >=17.4.0, locked: 19.1.0, latest: 19.1.0]
  - colorama [required: *, locked: 0.4.1, latest: 0.4.1]
  - funcsigs [required: >=1.0, locked: 1.0.2, latest: 1.0.2]
  - more-itertools [required: <6.0.0,>=4.0.0, locked: 5.0.0, latest: 7.0.0]
    - six [required: <2.0.0,>=1.0.0, locked: 1.12.0, latest: 1.12.0]
  - more-itertools [required: >=4.0.0, locked: 7.0.0, latest: 7.0.0]
  - pathlib2 [required: >=2.2.0, locked: 2.3.3, latest: 2.3.3]
    - scandir [required: *, locked: 1.10.0, latest: 1.10.0]
    - six [required: *, locked: 1.12.0, latest: 1.12.0]
  - pluggy [required: >=0.9, locked: 0.9.0, latest: 0.9.0]
  - py [required: >=1.5.0, locked: 1.8.0, latest: 1.8.0]
  - setuptools [required: *, locked: 41.0.0, latest: 41.0.0]
  - six [required: >=1.10.0, locked: 1.12.0, latest: 1.12.0]

Hm…Is it as many as it seems? Let’s look at their size.

$ dephell inspect venv --filter=lib_size
11.96Mb

Ugh…Ok, it’s Python. Are they actual?

$ dephell deps outdated
[
  {
    "description": "More routines for operating on iterables, beyond itertools",
    "installed": [
      "5.0.0"
    ],
    "latest": "7.0.0",
    "name": "more-itertools",
    "updated": "2019-03-28"
  },
]

Pytest requires old version of more-itertools. That happens.

If our tests and dependencies are OK, it’s time to deploy. First of all, increment the project version:

$ dephell project bump minor
INFO generated new version (old=1.2.0, new=1.3.0)

And then build packages:

$ dephell project build
INFO dumping... (format=setuppy)
INFO dumping... (format=egginfo)
INFO dumping... (format=sdist)
INFO dumping... (format=wheel)
INFO builded

Now, we can upload these packages to PyPI with twine.

These are some of the most useful commands. See documentation for more details.

Compatibility

DepHell is tested on Linux and Mac OS X with Python 3.5, 3.6, 3.7. And one of the coolest things is that DepHell is run by DepHell on Travis CI.

How can I help

1. Star project on Github. Developers believe in the stars.

2. Tell your fellows that Gram has a made cool thing for you.

3. Open an issue if you have thoughts on how to make DepHell better.

4. Things that you can contribute in any project in DepHell ecosystem:

   1. Fix grammar and typos.

   2. Document new things.

   3. Tests, we always need more tests.

   4. Make READMEs more nice and friendly.

   5. View issues with the help wanted label to find things that you can fix.

   6. Anything what you want. If it is a new feature, please open an issue before writing code.

Thank you :heart: