pre-commit githook to make sure files are always added in master and only deleted in feature branches

media-workflow.sh

#!/bin/bash

RED='\033[0;31m'
NC='\033[0m' # No Color

# pre-commit hook to check new files are always added to the master branch and deletions are always made in feature branches.
# useful when master should contain all the files ever added (eg. in a media project), and the feature branches can offer 'views' of parts of them


branch_name=$(git rev-parse --abbrev-ref HEAD)
non_added_files=$(git status -s | egrep -v ^A)
non_deleted_files=$(git status -s | egrep -v ^D)


if [ $branch_name == "master" ] && [ "$non_added_files" != "" ]; then
        # only allow adding files to master
echo "on branch: $branch_name;"
        printf "${RED}some changes are not additions, only allowing additions on master branch. Abort.${NC}\n"
        echo "$non_added_files"
        exit 1
fi

if [ $branch_name != "master" ] && [ "$non_deleted_files=" != "" ]; then
        # only allow removing files from other branches
        printf "${RED}some changes are not deletions, only allowing deletions on branch $branch_name. Abort.${NC}\n"
        echo "$non_deleted_files"
        exit 2
fi
exit 0