Make core aware of poetry lock files

[abn]

Lock file parsing logic and should be implemented by poetry-core. In many cases downstream consumers need to depend on poetry in order parse information, get packages etc from the lock file. This change proposes to move basic implementation to core such that poetry only needs to implements specifics such as Locker.locked_packages() which now will become return Repository(packages=self.get_packages(categories=["main"]).

This change also now ensures poetry.lock is included the package sdist.

[abn]

The build failures are because of the last poetry prerelease not working on windows/2.7.

[johnthagen]

Thank you for working on this. The missing lock file support is currently a blocker to better tox integration (enpaul/tox-poetry-installer#2, sinoroc/tox-poetry-dev-dependencies#45), so getting this in would be a big step forward for many users who want to use tox and poetry together.

[abn]

Appreciate the input. I would really appreciate wider testing of this to ensure it covers required scenarios. So, if anyone want to define various complex scenarios to test even just manually, that would help the confidence in the implementation.

Note that the lock parsing logic has undergone significant bug fixes in poetry@1.1.z some real interesting scenarios came up.

I am also considering a re-write of how lock data is loaded, so it's more a graph in memory.

Additionally working on the bug fixes, I realised that in order for the lock file to be truly independent the 508 information from pyproject for top level dependencies will also need to be preserved in the lock file.

[johnthagen]

@abn A couple of edge cases I hit when trying some of the tox plugins. Also, note that Poetry 1.1 changed how the lock file works, so in some cases a plugin worked on <1.1, but doesn't work on >1.1. I will say that in my opinion making it compatible with newer poetry is most important as that is what most users will be using.

Markers in sub-dependencies (one current plugin has issues dealing with this, so we need them parsed out properly in poetry-core):

[[package]]
name = "ipython"
version = "7.18.1"
description = "IPython: Productive Interactive Computing"
category = "main"
optional = false
python-versions = ">=3.7"

[package.dependencies]
appnope = {version = "*", markers = "sys_platform == \"darwin\""}
backcall = "*"
colorama = {version = "*", markers = "sys_platform == \"win32\""}
decorator = "*"
jedi = ">=0.10"
pexpect = {version = ">4.3", markers = "sys_platform != \"win32\""}
pickleshare = "*"
prompt-toolkit = ">=2.0.0,<3.0.0 || >3.0.0,<3.0.1 || >3.0.1,<3.1.0"
pygments = "*"
traitlets = ">=4.2"

URL dependencies:

[tool.poetry.dependencies]
en-core-web-sm = {url = "https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-2.3.0/en_core_web_sm-2.3.0.tar.gz"}

And Git dependencies, for example:

$ poetry add git+https://github.com/sdispater/pendulum.git#develop

[cognifloyd]

Pants (pantsbuild/pants#10655 (comment)) recently merged a custom way to read poetry's metadata. The lack of lock file support in poetry-core was cited as a reason to not reuse poetry-core. I would have preferred they reuse poetry-core, but oh well.

What's the next step to get this merged?

[abn]

Sorry for letting this become stale, next step is for me to get this rebased and reworked with the recent changes. Additionally, once it is ready, I would definitely appreciate some addtional eyes on this.

[abn]

Rebased this. While the code works, and is an exact port of current poetry@master, the functionality introduced via groups is a bit ambiguous at present.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
5 Code Smells

No Coverage information
1.5% Duplication

[riconnon]

@abn this currently represents the primary reason I'm stuck installing poetry rather than poetry-core for my container builds, because I want to install a consistent set of things based on the lock file.
I'm very keen to see this functionality included in poetry-core if possible so let me know if there's anything that can be done to help move this along.

[riconnon]

In case it's beneficial, I have rebased this PR on my branch here: https://github.com/riconnon/poetry-core/tree/add-locker

[abn]

Thanks @riconnon I will see what the other's on the core team think about this in general.

[riconnon]

@abn did you get a chance to talk to the rest of the core team? This remains my biggest poetry bugbear so I'm keen to work to a solution if possible.
Let me know if there's anything I can do to help.

[rbuckland]

@abn - do you have an update for this ticket ?

[noamraph]

@abn @sdispater can you say what's missing here, if anything? I just heard of pipx run, and I want to write utilities that would allow me, and others in my company, to just pipx run them. For this, I obviously want users to use the dependencies in the lock file, so my utility will run in the most repeatable way. However, I understand that this is waiting for this PR, from 3 years ago, and specifically, to your feedback. Can you help in saying what needs to be done?

Thanks!
Noam