feat(ref): #1017 added name field for gitref

[haarchri]

Signed-off-by: Christopher Paul Haar christopherpaul.haar@dkb.de
Co-Authored-by: André Kesser andre.kesser@dkb.de

implemented Name field for GitRepositoryRef wich takes precedence over all reference fields. If Name is found for both Branch and Tag, Tag is used!

implements #1017

Open:
need to implement HostKeyCallback for go-git v5:
ssh: must specify HostKeyCallback

Tests:

branch: v1.x

spec:
  gitImplementation: go-git
  interval: 5m0s
  ref:
    name: v1.x
  timeout: 60s
  url: https://github.com/stefanprodan/podinfo

kubectl get gitrepo -A 
NAMESPACE   NAME      URL                                       AGE     READY   STATUS
default     podinfo   https://github.com/stefanprodan/podinfo   1h51m   True    stored artifact for revision 'HEAD/6c8a85a5ab953874c7c83d50317359a0e5a352a9'

tag: 6.0.3

spec:
  gitImplementation: go-git
  interval: 5m0s
  ref:
    name: 6.0.3
  timeout: 60s
  url: https://github.com/stefanprodan/podinfo

kubectl get gitrepo -A 
NAMESPACE   NAME      URL                                       AGE     READY   STATUS
default     podinfo   https://github.com/stefanprodan/podinfo    1h58m   True    stored artifact for revision 'HEAD/ea292aa958c5e348266518af2261dc04d6270439'

[stefanprodan]

@haarchri as discussed in #1017 the ref.name must be a Git reference which has this format:

• branch refs/heads/main
• tag refs/tags/v0.0.1
• GitHub PR refs/pull/1017/head
• GitLab MR refs/merge-requests/1017/head

To implement this, first we need to create a new checkout strategy in fluxcd/pkg/git.

[hiddeco]

Superseded by #1026