generate a very simple changelog between the current branch and it's build branch, or other named branch

git-changelog

#!/bin/bash

# gives a changelog from the last build branch to the feature branch

currentBranch=$(git rev-parse --abbrev-ref HEAD)
currentBranch=${currentBranch#"build/"}
buildBranch="build/${currentBranch}"

# if no args, $buildBranch..$currentBranch
# if one arg, $1..$currentBranch
# if twho args, $1..$2
fromBranch=${1-$buildBranch}
toBranch=${2-$currentBranch}

fromType=$([ -z "${1}" ] && echo 'build branch' || echo '')
echo "Change log from ${fromType} ${fromBranch} to ${toBranch}:"

git log --pretty='format:- %s (%aN)' "${fromBranch}..${toBranch}"

Added a header note to the log, so we know what we're looking at.