Support LFS in git plugin

[colindean]

Description

We're currently using this to pull down tags and LFS.

def pull_git_tag_and_lfs(pull_tags_from_branch):
    return {
        "name": "git-lfs",
        "image": "hub.docker.target.com/gitlab/gitlab-runner:latest",
        "commands": [
            "git lfs pull",
            "git fetch --no-tags origin %s" % pull_tags_from_branch
        ]
    }

The git plugin can pull tags but it still can't pull LFS.

Value

Adding LFS would enable us to use the git plugin and not need to resort to external images.

Definition of Done

Add lfs: true and it just works.

steps:
  - name: clone_hello-world
    image: vela-plugins/git:v0.6.0
    pull: always
    parameters:
      path: hello-world
      ref: refs/heads/master
      remote: https://git.example.com/octocat/hello-world.git
      sha: 7fd1a60b01f91b314f59955a4e4d4e80d8edf11d
      tags: true
      lfs: true

[wass3rw3rk]

denfinitely doable and the size increase is less than what it was adding github-cli (go-vela/vela-git#157) which added over 50MB?!

image	size
vela-git	30.3MB
vela-git + github-cli	82.9MB
vela-git + github-cli + git-lfs	90.2MB

[colindean]

GH CLI has a ton of deps baked in IIRC.

[wass3rw3rk]

ah, i thought it was "just a Go binary" ™️ 😮 i guess it is but with lots of dependencies like you said.