Packages with semvar+devnum schemas don't resolve.

• [ 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: Ubuntu 18.10
• Poetry version: 0.12.10
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/jMyles/8ad4b9e81ec8697669c4df8480f121c7

Issue

A schema of seemingly increasingly popularity, especially in high-velocity projects, is the following:

(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(-(?P<stage>[^.]*)\.(?P<devnum>\d+))

For example: 0.2.1-alpha.26

It appears that poetry will not install packages that have such a version specification in their history. For example:

poetry add eth-keys

results in:

                                                         
[ValueError]                              
Could not find a matching version of package eth-keys  
                                                         
add [-D|--dev] [--git GIT] [--path PATH] [-E|--extras EXTRAS] [--optional] [--python PYTHON] [--platform PLATFORM] [--allow-prereleases] [--dry-run] [--] <name> (<name>)...

…despite eth-keys obviously being a valid package.

[fchorney]

What about the situation where a packages dependency only has prereleases? My solution was to just add that sub package manually, but I don’t think that should be the solution.

[stale[bot]]

Closing this issue automatically because it has not had any activity since it has been marked as stale. If you think it is still relevant and should be addressed, feel free to open a new one.