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> While this doesn’t give us great granularity in terms of order of changes within a single day

Use hours, minutes and seconds?

I like being able to use the image in later pipeline steps without having to pass a variable around. This would be tough to do with time, but it's easy to do with date since we only really run those pipeline during work hours.

Don't you need partial SHA anyway? This needs a variable.

And if you have a git checkout around, you can use git commit timestamp - time up to seconds and does not need anything except the source tree.

This will result in using the same tag for all builds that day - which defeats the purpose of a unique version to a large degree If you are planning on testing or deploying a specific version.

The tag also contains the commit id, not just the date.

Right - that would assume that the build does not pull in potentially different dependency [versions] even if the code itself doesn't change. This may or may not be the case.

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