Get the time and date of git tags

Question

I have a project that is using git and have tagged all the releases with a tag.

$ git tag
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.1.0

My goal is to list

Answer 1

one can use gawk (not awk) to convert date in the "tagger" line to something human-readable:

git rev-parse v4.4-rc1 | xargs git cat-file -p | gawk '/^tagger/ { print strftime(PROCINFO["strftime"], $(NF-1)) }'

if one does not like gawk then date can be used to convert unix time:

git rev-parse v2.76 | xargs git cat-file -p | awk '/^tagger/ { print "@" $(NF-1) }' | xargs date -d

and example (dnsmasq git repo):

$ git rev-parse v2.76 | xargs git cat-file -p | awk '/^tagger/ { print "@" $(NF-1) }' | xargs date -d
Wed May 18 16:52:12 CEST 2016