Replace calls to git binary in git package with pure go code

[puerco]

Our git package has several calls to the git package. In order to be able to use our binaries in leaner container images (ie distroless) we need to write alternatives to some of its functions to pure go, and drop the calls to the git binary.

[justaugustus]

From @puerco in #13 (comment) and #13 (comment):

Thinking a little bit about these functions that relate to forking, much of the code relies on github apis, but if you think about it the functions are more git specific. For example, things like github.BranchExists() are in essence GitHub API laziness for looking into the git ls-remote output 🤔 WDYT?

The downside of course is that we would have to implement some of the github code in git which is in practice pointless as we already have the functionality.

Also, ref #3 (comment):

/hold cancel (ref: https://kubernetes.slack.com/archives/CJH2GBF7Y/p1631557597076000?thread_ts=1631554156.074500&cid=CJH2GBF7Y)

@justaugustus

@puerco — actually, I stand by the original assessment (because of github importing git)

@justaugustus

Let’s do the initial migration to release-sdk and then pull out the git stuff in a follow-up

@puerco

ok 👍

@justaugustus

(I’d just prefer not to have any refactors masked by the migration commits)

@puerco

yeah makes sense

@justaugustus

also, it looks like it might be really simple, but I’ve made the mistake of assuming that before 🙃

/help

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In response to this:

From @puerco in #13 (comment) and #13 (comment):

Thinking a little bit about these functions that relate to forking, much of the code relies on github apis, but if you think about it the functions are more git specific. For example, things like github.BranchExists() are in essence GitHub API laziness for looking into the git ls-remote output 🤔 WDYT?

The downside of course is that we would have to implement some of the github code in git which is in practice pointless as we already have the functionality.

Also, ref #3 (comment):

/hold cancel (ref: https://kubernetes.slack.com/archives/CJH2GBF7Y/p1631557597076000?thread_ts=1631554156.074500&cid=CJH2GBF7Y)

@justaugustus

@puerco — actually, I stand by the original assessment (because of github importing git)

@justaugustus

Let’s do the initial migration to release-sdk and then pull out the git stuff in a follow-up

@puerco

ok 👍

@justaugustus

(I’d just prefer not to have any refactors masked by the migration commits)

@puerco

yeah makes sense

@justaugustus

also, it looks like it might be really simple, but I’ve made the mistake of assuming that before 🙃

/help

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[palnabarun]

/cc
(I am interested in this but not very sure when I would get some time to work on it, maybe the December vacations. This sounds to me like a good weekend hacking project)

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/lifecycle stale

[k8s-triage-robot]

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/lifecycle stale

[cpanato]

/remove-lifecycle stale

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/lifecycle stale

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/lifecycle rotten

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/close not-planned

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@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
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/close not-planned

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[sbdtu5498]

/assign