Resolver writes incorrect version into the lock file for packages with numbers in the name

[kleschenko]

• [x] I am on the latest Poetry version.
• [x] I have searched the issues of this repo and believe that this is not a duplicate.
• [x] If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: osx
• Poetry version: 1.0.0b3
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/kleschenko/4a694278ea08be4bce9f48926985a952

Issue

I've found an issue with packages that have a hyphen followed by the number in their name. (for legacy repositories) For example, I have this line in my pyproject.toml:

mandrill-37 = ">=1.1.0"

and after the poetry lock command there will be a following entry in the poetry.lock:

[[package]]
description = "A CLI client and Python API library for the Mandrill email as a service platform. Forked fork python 3.7 support"
name = "mandrill-37"
optional = false
python-versions = "*"
version = "37-1.1.0"

The problem here is in the incorrect version being written down to the lock-file which couldn't be installed later.

Looks like an issue is with the version regex used to split filename and get a version from it:

In [1]: import re                                                                                                      

In [2]: VERSION_REGEX = re.compile(r"(?i)([a-z0-9_\-.]+?)-(?=\d)([a-z0-9_.!+-]+)")                                     

In [3]: VERSION_REGEX.match('mandrill-37-1.1.0')                                                                       
Out[3]: <re.Match object; span=(0, 17), match='mandrill-37-1.1.0'>

In [4]: VERSION_REGEX.match('mandrill-37-1.1.0').groups()                                                              
Out[4]: ('mandrill', '37-1.1.0')

[finswimmer]

Hello @kleschenko,

thanks a lot for reporting. It seems that this is solved in the meantime. At least with poetry 1.0.3 I get:

[[package]]
category = "main"
description = "A CLI client and Python API library for the Mandrill email as a service platform. Forked fork python 3.7 support"
name = "mandrill-37"
optional = false
python-versions = "*"
version = "1.1.0"

fin swimmer

[github-actions[bot]]

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