GitLab file resolver should support deeply nested repositories

[etsauer]

Describe the bug

When attempting to create a workspace from a GitLab repository that is more than 2 levels deep (e.g. my.gitlab.com/group/subgrp1/subgrpN/repo.git), Che will fail to find the devfile.

Looking in <cheUrl>/swagger/#/scm/resolveFile, this can be easily seen by pluggin in the above sample URL:

Sample curl from SWAGGER

curl -X 'GET' \
  '[https://devspaces.apps. mycluster.p1.openshiftapps.com/api/scm/resolve?repository=https%3A%2F%2Fmy.gitlab.com%2Fgroup%2Fsubgrp1%2FsubgrpN%2Frepo.git&file=.devfile.yaml'](https://devspaces.apps.my-cluster.p1.openshiftapps.com/api/scm/resolve?repository=https%3A%2F%2Fmy.gitlab.com%2Fgroup%2Fsubgrp1%2FsubgrpN%2Frepo.git&file=.devfile.yaml%27) \
  -H 'accept: */*'

Response:

{
  "message": "Cannot find suitable file resolver for the provided URL."
}

It looks like the GitLabUrlParser is written to stop at two levels of depth per: https://github.com/eclipse-che/che-server/blob/main/wsmaster/che-core-api-factory-gitlab/src/main/java/org/eclipse/che/api/factory/server/gitlab/GitlabUrlParser.java#L48-L52

However, as documented in the Gitlab Docs GitLab supports up to 20 levels of nesting. It's common for enterprise users to use sub groups to match their org hierarchy, which commonly goes beyond 2 levels.

Che version

7.58

Steps to reproduce

Create a GitLab repo with at least 3 levels of subgroups such as https://my.gitlab.com/group/subgrp1/subgrpN/repo.git, and put a devfile in it.

Use SWAGGER or the curl below to try and fetch the devfile:

curl -X 'GET'
'https://devspaces.apps.my-cluster.p1.openshiftapps.com/api/scm/resolve?repository=https%3A%2F%2Fmy.gitlab.com%2Fgroup%2Fsubgrp1%2FsubgrpN%2Frepo.git&file=.devfile.yaml'
-H 'accept: /'

Expected behavior

Should return 200, and allow you to download the devfile

Runtime

OpenShift

Screenshots

No response

Installation method

OperatorHub

Environment

Linux

Eclipse Che Logs

No response

Additional context

No response

[devstudio-release]

sync'd to Red Hat JIRA https://issues.redhat.com/browse/CRW-4154

• feat: GitLab support nested repositories che-server#467