Packages/composer: semver not fully supported

Summary

Semver is not fully supported with the composer registry: metadata are not supported.

Steps to reproduce

• Create a tag: v1.0.1+some-metadata

• Add it to the registry via curl; + must be encoded, so I use json instead (curl -d '{"tag":"v1.0.1+metadata"}' -H 'Content-Type: application/json')

• The package is reference as "1.0.1" instead of "1.0.1+some-metadata"

Pre-release works well (for example: 2.0.0-alpha.5)

Example Project

https://gitlab.com/Gounlaf/issue-composer-registry

What is the current bug behavior?

The metadata is stripped from the tag.

What is the expected correct behavior?

Metadata should be included in the

Relevant logs and/or screenshots

The API returns {"message":"201 Created"} in all cases

Output of checks

This bug happens on GitLab.com

Possible fixes

NOOP

I've search for bugs with label=~"Category:Package Registry" + label~"bug" + composer. I found no related issues.

Regards.