Created
September 29, 2021 11:25
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#!/bin/bash | |
if [ "$#" -ne 2 ] ; then | |
echo "Usage: `basename -- $0` date tagFilter" | |
echo "eg: `basename -- $0` 20201225 TAG_SUBSTRING_TO_MATCH" | |
exit 1 | |
fi | |
DATE=$1 | |
SEARCH=$2 | |
YEAR=${DATE:0:4} | |
MONTH=${DATE:4:2} | |
DAYS=${DATE:6:2} | |
git for-each-ref --sort=creatordate --format '%(refname) CreateDate=%(creatordate)' refs/tags | | |
grep ${SEARCH} | | |
awk -F'CreateDate=' -v YEAR=${YEAR} -v MONTH=${MONTH} -v DAYS=${DAYS} ' | |
BEGIN{ | |
m=split("Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec",d,"|") | |
for(o=1;o<=m;o++){ | |
months[d[o]]=sprintf("%02d",o) | |
} | |
before = mktime(YEAR " " MONTH " " DAYS " 00 00 00") | |
} | |
{ | |
split($2,time," ") | |
date = (time[5] " " months[time[2]] " " time[3] " 00 00 00 ") | |
timestamp = mktime(date) | |
if ( timestamp < before ) { | |
split($1,tagElements,"/") | |
print tagElements[3] | |
} | |
} | |
' | tail -1l | |
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Find the last tag in a git repo which precedes a date and matches a search string
Needs to be run in the same directory as the repo (or amend to take git repo dir as an extra argument)