How do I read tagger information from a GIT tag?

Question

So far I have:

git rev-parse <tagname> | xargs git cat-file -p 

but this isn't the easiest thing to parse. I was hoping for something similar to git-log's --pretty option so I could grab just the info I need.

Any ideas?

Answer 1

A more direct way of getting the same info is:

git cat-file tag <tagname> 

This uses a single command and avoids the pipe.

I used this in a bash script as follows:

if git rev-parse $TAG^{tag} -- &>/dev/null then     # Annotated tag     COMMIT=$(git rev-parse $TAG^{commit})     TAGGER=($(git cat-file tag $TAG | grep '^tagger'))     N=${#TAGGER} # Number of fields     DATE=${TAGGER[@]:$N-2:2} # Last two fields     AUTHOR=${TAGGER[@]:1:$N-3} # Everything but the first and last two     MESSAGE=$(git cat-file tag $TAG | tail -n+6) elif git rev-parse refs/tags/$TAG -- &>/dev/null then     # Lightweight tag - just a commit, basically     COMMIT=$(git rev-parse $TAG^{commit}) else     echo "$TAG: not a tag" >&2 fi