#!/bin/sh

# preserve a packages libraries

verbose=0
all=0
script=0
check=0

while getopts avs arg; do
	case $arg in
		a) all=1;;
		v) verbose=1;;
	c) check=1;;
	s) script=1;;
	?) printf 'usage: zpm-preserve [-av] <pkgname>\n'
		exit 1
		;;
	esac
done

pkgname="$1"

pacman -Qlq "$pkgname" | while read file; do
	if [ ! -f "$file" ]; then continue; fi
	base=$(basename "$file")
	if [ $all -eq 0 ] && [ "$base" = "${base#lib}" ]; then continue; fi

	if [ $check -eq 1 ]; then
		elftype -e "$file"
		rv=$?
		if [ $rv -ne 0 ]; then continue; fi
		for lib in $(zpm getlibs $file | grep preserve); do
			echo $pkgname $file $lib
		done
		continue
	fi

	soname=$(zpm soname $file)
	if [ $? -eq 0 ] && [ -n "$soname" ]; then
		dir=$(dirname "$file")
		if [ "$script" -ne 0 ]; then
			printf 'mkdir -p "%s"\n' "$dir/preserve"
			printf 'ln -f "%s" "%s"\n' "$file" "$dir/preserve/"
		else
			mkdir -p "$dir/preserve"
			if [ "$verbose" -gt 0 ]; then
				printf '# preserving %s\n' "$file"
			fi
			ln -f "$file" "$dir/preserve/"
		fi
	fi
done