古いgitブランチを探すシェルスクリプト

old-branches.sh

#!sh -eu

threshold=$1
threshold=$(echo $threshold | sed -e s/-//g) # 2018-06-28 -> 20180628

for b in $(git branch -r | grep -v HEAD);
do
        date=$(git show --date=short --pretty=format:"%ad" $b | head -1 | sed -e s/-//g)
        if [ $date -lt $threshold ]; then
                echo $b $date
        fi
done