#!/bin/sh

set -e

: "${prefix:=/usr/local}"
: "${includedir:=$prefix/include}"
: "${libdir:=$prefix/lib}"
: "${DESTDIR:=}"

HEADER=BlocksRuntime/Block.h
LIB=libBlocksRuntime.a
SHLIB=

docmd()
{
	echo "$*"
	if [ -z "$dryrun" ]; then eval "$*"; fi
}

if ! myid="$(id -u)"; then
	echo "Cannot run id, aborting!"
	exit 1
fi
if [ ! -r $HEADER ]; then
	echo "Cannot find $HEADER, aborting!"
	exit 1
fi
dryrun=
if [ "$1" = '-n' ] || [ "$1" = '--dry-run' ]; then
	dryrun=1
	shift
fi
static=1
shared=1
case "$1" in
	"-static"|"--static")
		shift
		shared=
		;;
	"-shared"|"--shared")
		shift
		static=
		;;
esac
if [ "$#" != 0 ]; then
	echo "Usage: [prefix=prefixdir] $0 [-n | --dry-run] [-shared | -static]"
	exit 1
fi
if [ -n "$shared" ]; then
	UNAME_S="$(uname -s 2>/dev/null)" || :
	case "$UNAME_S" in
		Darwin)
			SHLIB="${LIB%.a}.dylib"
			SHLIBMODE=755
			;;
		*)
			SHLIB="${LIB%.a}.so"
			SHLIBMODE=644
			;;
	esac
	if [ -n "$static" ]; then
		# ignore a missing shared library
		[ -e "$SHLIB" ] || SHLIB=
	else
		LIB=
	fi
fi
if [ -n "$LIB" ] && [ ! -r "$LIB" ]; then
	echo "Cannot find $LIB, did you run \`buildlib\` or \`buildlib-osx\`?"
	exit 1
fi
if [ -n "$SHLIB" ] && [ ! -r "$SHLIB" ]; then
	echo "Cannot find $SHLIB, did you run \`buildlib -shared\` or \`buildlib-osx -shared\`?"
	exit 1
fi

[ -z "$DESTDIR" ] ||
echo "Destination Root(\$DESTDIR):     $DESTDIR (default is \"\")"
echo "Install Prefix(\$prefix):        $prefix (default is /usr/local)"
echo "Include Directory(\$includedir): $includedir (default is \$prefix/include)"
echo "Library Directory(\$libdir):     $libdir (default is \$prefix/lib)"
echo "(use prefix=prefixdir $0 [or similar] to change)"
echo ''

if [ -z "$DESTDIR" -a -z "$dryrun" -a "$myid" != 0 ]; then
	echo "Must be root to install, use sudo $0"
	echo "(Or try using the --dry-run option)"
	exit 1
fi
docmd "install -d "$DESTDIR"$includedir "$DESTDIR"$libdir"
docmd "install -m 644 $HEADER "$DESTDIR"$includedir/"
[ -z "$LIB" ] ||
docmd "install -m 644 $LIB "$DESTDIR"$libdir/"
[ -z "$SHLIB" ] ||
docmd "install -m $SHLIBMODE $SHLIB "$DESTDIR"$libdir/"