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Elixir Cross Referencer

#!/bin/sh

export LC_ALL=POSIX
export LC_CTYPE=POSIX

prefix=${1}
if [ -z "$prefix" ]; then
	echo "usage: applets/install.sh DESTINATION [--symlinks/--hardlinks]"
	exit 1;
fi
h=`sort busybox.links | uniq`
cleanup="0"
noclobber="0"
case "$2" in
	--hardlinks) linkopts="-f";;
	--symlinks)  linkopts="-fs";;
	--cleanup)   cleanup="1";;
	--noclobber) noclobber="1";;
	"")          h="";;
	*)           echo "Unknown install option: $2"; exit 1;;
esac

if [ -n "$DO_INSTALL_LIBS" ] && [ "$DO_INSTALL_LIBS" != "n" ]; then
	# get the target dir for the libs
	# assume it starts with lib
	libdir=$($CC -print-file-name=libc.so | \
		 sed -n 's%^.*\(/lib[^\/]*\)/libc.so%\1%p')
	if test -z "$libdir"; then
		libdir=/lib
	fi

	mkdir -p $prefix/$libdir || exit 1
	for i in $DO_INSTALL_LIBS; do
		rm -f $prefix/$libdir/$i || exit 1
		if [ -f $i ]; then
			cp -a $i $prefix/$libdir/ || exit 1
			chmod 0644 $prefix/$libdir/$i || exit 1
		fi
	done
fi

if [ "$cleanup" = "1" ] && [ -e "$prefix/bin/busybox" ]; then
	inode=`ls -i "$prefix/bin/busybox" | awk '{print $1}'`
	sub_shell_it=`
	cd "$prefix"
	for d in usr/sbin usr/bin sbin bin; do
		pd=$PWD
		if [ -d "$d" ]; then
			cd $d
			ls -iL . | grep "^ *$inode" | awk '{print $2}' | env -i xargs rm -f
		fi
		cd "$pd"
	done
	`
fi

rm -f $prefix/bin/busybox || exit 1
mkdir -p $prefix/bin || exit 1
install -m 755 busybox $prefix/bin/busybox || exit 1

for i in $h; do
	appdir=`dirname $i`
	mkdir -p $prefix/$appdir || exit 1
	if [ "$2" = "--hardlinks" ]; then
		bb_path="$prefix/bin/busybox"
	else
		case "$appdir" in
		/)
			bb_path="bin/busybox"
		;;
		/bin)
			bb_path="busybox"
		;;
		/sbin)
			bb_path="../bin/busybox"
		;;
		/usr/bin|/usr/sbin)
			bb_path="../../bin/busybox"
		;;
		*)
		echo "Unknown installation directory: $appdir"
		exit 1
		;;
		esac
	fi
	if [ "$noclobber" = "0" ] || [ ! -e "$prefix$i" ]; then
		echo "  $prefix$i -> $bb_path"
		ln $linkopts $bb_path $prefix$i || exit 1
	else
		echo "  $prefix$i already exists"
	fi
done

exit 0