Generates a Changelog from the tags in a Git repository

changelog.sh

#!/bin/sh
PREVIOUS="HEAD"
for TAG in `git tag | grep "\d*.\d*-build-\d*" | sort -r | head`
do 
        echo "========================"
        echo "Changes in $PREVIOUS"
        echo "========================"
        CHANGES=`git log $TAG..$PREVIOUS --format=%B | grep "^TF:" | sed 's/TF:/-/g'`
        if [[ -z $CHANGES ]] 
                then
                        echo "No significant changes"
                else
                        echo "$CHANGES"
        fi
        echo ""
        PREVIOUS=$TAG
done