(WIP) Release process rehaul

[frapposelli]

DO NOT MERGE this PR, upstream work in goreleaser is not complete yet.

This PR intends to rehaul the release process for govc, adding vcsim to the list of artifacts published at every release, and keeping the door open for more (like toolbox).

Changes:

• Move to a single, autogenerated, changelog. the changelog creation is automated with git-chlog keeping the same standard structure as before. The old changelogs are preserved and point to the new one.
• build.sh and release.sh are removed, replaced by goreleaser and git-chlog.
• RELEASE.md was added, to explain and document the steps required to cut a govmomi release.
• vcsim was added as published artifact (binary, brew and docker image)
• Both vcsim and govc are compiled for arm and arm64 platforms.

/cc @dougm @akutz @lamw

[akutz]

Hi @frapposelli,

I'd like to suggest changing the default behavior of the root Makefile. With Go 1.10+ supporting build cache, I think it's better to use go build whenever possible over go install. It keeps things from polluting the global GOBIN. So instead of using the Makefile's install target or having test targets depend on install targets, I think we should have it all depend on build targets.

It's also consistent with how typical Makefiles differentiate between building and installing.

Thoughts?

[dougm]

Thanks @frapposelli , this is looking good, definitely want to get this in for the next release.

[dougm]

btw, this diff seems to be a difference with sort between Linux and Mac.

[frapposelli]

yeah, I noticed as well, will investigate.

[frapposelli]

I standardized scripts/contributors.sh on GNU sort, but running it on Mac does not change the outcome... interesting...

[frapposelli]

Pushed an update with some improvements and added toolbox to the list of binaries built.

@akutz agree on your suggested changes, will make a separate commits as I need to take a second look at the current Makefile, I focused mostly on goreleaser as it is compiling the binaries independently, without calling the Makefile.

[embano1]

Closing this as #2340 and following PRs will fix it using Github Actions.