Don't deploy tags to the CI k8s stack (only main commits)

[moskyb]

No description provided.

[zhming0]

I wonder if we need to do branch check here at all? When we create a tag, it will always be from HEAD in main, which would have been deployed already.

It's also an issue if we have this in main branch:

commit A -> B - C

and we decided to make a tag for B, in such case we don't really want a deployment.

Would this work?

Suggested change

	# get the most recent branch that contains the tag, then trim the leading two characters off (git branch outputs an
	# asterisk and space before the current branch, and two spaces before other branches)
	# eg
	# $ git branch
	# main
	# * feature-one
	# feature-two
	# would mean we're on the feature-one branch
	tag_branch=$(git branch --contains "tags/${BUILDKITE_TAG}" --sort committerdate | head -n 1 | cut -b 3-)
	if [ "$tag_branch" != "main" ]; then
	echo "Tag ${BUILDKITE_TAG} was not created from main branch (found: $tag_branch), skipping deployment"
	exit 0
	fi
	exit 0

[moskyb]

When we create a tag, it will always be from HEAD in main, which would have been deployed already.

not when we're tagging off of, for example, v0.32.x, which is a release branch for the 0.32 series

[zhming0]

but in that case, since it has a tag, we can filter it out?

It seems this logic would suffice? if tag -> no deploy

[moskyb]

hmmm, good point. i think we can push this a level higher and do it using if in the pipeline. will investigate...