git-diffadd

#!/bin/bash -x

#
#    Created by Shaul Yermol 2018 
#    Copyright © 2018 Shaul Yemrol shaul.yermol@gmail.com. All rights reserved.
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.

#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <https://www.gnu.org/licenses/>.

((!$#)) && echo No file name, command ignored! && exit 1

IFS=$(echo -en "\n\b")
echo diffadd ${1}
INPATH="${1}"

if [[ -f "${INPATH}" ]]; then 
    git difftool -y "$INPATH" && git add -u $INPATH
elif [[ -d "${INPATH}" ]]; then
    for FILE in `git status --porcelain "${INPATH}" | grep -e '^AM' -e '^ M' -e '^ AM' | cut -c 4-1000`; do
	echo $FILE
	FILE=$( echo "$FILE" | sed 's/\"//g' )
	FILE=$(printf %q "$FILE")
	echo $FILE
	git difftool -y -- $FILE 
	read -p "Add ${FILE}? y/n" -n 1 -r
	# echo  # (optional) move to a new line
	if [[ $REPLY =~ ^[Yy]$ ]]
	then
    	# do dangerous stuff
	    git add -u $FILE ;
	fi
    done
else
    echo "${INPATH}" is not a valid file or directory
    exit 1
fi