#!/bin/bash
set -e

lock=${PWD%/*}/.fuck.lock
if [ "x$FUCKING_CARGO" != "x$lock" ]; then
	FUCKING_CARGO=$lock \
	exec with-lock-ex -w "$lock" "$0" "$@"
fi

exec 3<../Fuck
f=Cargo.toml

sed='
/^ *\[dependencies\]/,/^ \[/{
'

exec 4<../Fuck
while read <&4 what where; do
	if [ "x$what" = x- ]; then continue; fi
	qwhere="${where//\//\\/}"
	sed+=' s/^'$what' *=.*/'$what' = { path = "..\/'"${qwhere}"'" }/;
'
done
sed+='}
'

exec 4<../Fuck
while read <&4 what where; do
	wf=../$where/$f
	rm -f $wf.fucking~
	sed <$wf >$wf.fucking~ "$sed"
done

exec 4<../Fuck
while read <&4 what where; do
	wf=../$where/$f
	if ! test -e $wf.unfucked~; then
		ln $wf $wf.unfucked~
	fi
done

trap '
	set +e
	while read <&3 what where; do
		wf=../$where/$f
		if test -e $wf.unfucked~; then
			rm -f $wf.fucked~
			ln $wf $wf.fucked~
			mv -f $wf.unfucked~ $wf
		fi
	done
	echo >&2 'Unfucked'
' EXIT

exec 4<../Fuck
printf >&2 'Fucking'
while read <&4 what where; do
	wf=../$where/$f
	printf >&2 ' %s' "$what"
	if cmp -s $wf.fucked~ $wf.fucking~; then
		mv -f $wf.fucked~ $wf
		rm -f $wf.fucking
	else
		mv -f $wf.fucking~ $wf
		rm -f $wf.fucked
	fi
done
echo >&2

"$@"