Tuesday, 16 June 2015

git tricks - get latest tag and its distance from HEAD

Problem: "I want to get the git tag of the current project, but only if it's associated to the latest commit. If not, I want to know what's the current commit hash."

In order to achieve this I was using something like:
This works but a drawback is that I either see the tag or the latest commit.
So a coworker pointed me to this:

git describe --tags --always

which I didn't know and it's just great. It returns a string with this format:

TAG-N-gSHA

where:

TAG is the most recent tag.
N is the number of commits from the TAG.
'g' is just a formatting convention.
SHA is the latest commit (HEAD).

If the latest commit is also pointed by the tag, then it just returns TAG.

'git describe' is explained here.

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