#!/bin/bash
# - arguments will be exported to env
# - must called from within the repo root

export REPO=$(basename $(pwd) .git)

while test $# -gt 0
do
	export "$1"
	shift
done

for FILE in $(ls -a $(dirname -- $0)/presets)
do
	SRCFILE=$(dirname -- $0)/presets/$FILE
	case $FILE in
	.|..)
		continue
		;;
	composer.json)
		test "${COMPOSER+set}" = "" && continue
		SRCFILE=$(mktemp -t $RANDOM)
		php -d variables_order=E $(dirname -- $0)/presets/composer.json >$SRCFILE
		;;
	package.xml|CREDITS)
		test "${PECL+set}" = "" && continue
		SRCFILE=$(mktemp -t $RANDOM)
		php -d variables_order=E $(dirname -- $0)/presets/package.xml >$SRCFILE
		;;
	README.md)
		SRCFILE=$(mktemp -t $RANDOM)
		php -d variables_order=E $(dirname -- $0)/presets/README.md >$SRCFILE
		;;
	*)
		;;
	esac

	if test -e $FILE
	then
		DIFF="diff -udbBE -- $SRCFILE $FILE"
		# ignore changes with only additions or removals
		if  ! $DIFF | awk '{if(NR<4){next}}/^-/{if(p){exit 1}m++}/^\+/{if(m){exit 1}p++}'
		then
			while read -n 1 -p "File $FILE exists and differs (q,s,r,d,v,?) " ACTION
			do
				echo
				case $ACTION in
				s)
					break
					;;
				r)
					cp -fv -- $SRCFILE $FILE
					break
					;;
				d)
					$DIFF
					;;
				v)
					vimdiff -- $SRCFILE $FILE
					;;
				q)
					exit
					;;
				*)
					echo "Select what to do now:"
					echo "  (q)uit and exit program now"
					echo "  (s)kip this file an keep the existing"
					echo "  (r)eplace the existing file with the preset"
					echo "  (d)iff the two files -udbBE"
					echo "  (v)imdiff the two files"
					echo "  (?) this help"
					echo
					;;
				esac
			done
		fi
	else
		cp -v $SRCFILE $FILE
	fi
done