Git

#!/usr/local/bin/bash
if [ "$1" == "" ]; then
        echo "usage: $0 <filename>"
        exit 1
fi
 
if [ ! -e $1 ]; then
        echo "$0: File does not exist ($1)"
        exit 1
fi
 
echo -en "Finding first commit..."
COMMIT=`git log --pretty=oneline "$1" | tail -n 1 | cut -d " " -f 1`
if [ "$COMMIT" == "" ]; then
        echo "$0: Error while retrieving commits for file \"$1\""
        exit 1
fi
 
echo -en "\rFinding tags containing commit $COMMIT..."
git tag -l --contains "$COMMIT" > /tmp/tag_contains
if [ "$?" != "0" ]; then
        echo "$0: Error while retrieving tags containing commit \"$COMMIT\""
        exit 1
fi
 
echo -en "\rFinding first tag that contains $COMMIT..."
git for-each-ref --sort='-*authordate' --format='%(tag)' refs/tags/ |
while read a; do
        if [ "$a" == "" ]; then
                continue
        fi
        grep "$a" /tmp/tag_contains > /dev/null
        if [ "$?" == "0" ]; then
                LAST=$a
        else
                echo "$LAST" > /tmp/tag_first
                break
        fi
done
TAG=`cat /tmp/tag_first`
rm /tmp/tag_contains /tmp/tag_first
 
echo -en "\rFinding tag information..."
INFO=`git show "$TAG" | head -n 3 | tail -n 2`
if [ "$INFO" == "" ]; then
        echo "$0: Error retrieving info for tag \"TAG\" (maybe it isn't annotated?)"
        exit 1
fi
 
echo -en "\r\0033[K"
echo -e "File:\t\t$1"
echo -e "First tag:\t$TAG"
echo "$INFO" | sed -re 's/^(.+):[ ]+(.+)$/\1:\t\t\2/'