configure

#!/bin/sh

CONF_VERSION="`git describe`"
CONF_BUILD_NAME="gojira $CONF_VERSION"
CONF_TARGETS="out/gojira lib"
CONF_PREFIX=/usr/local
CONF_SYSROOT=
CONF_GOJIRA_LIBDIR=
CONF_ENABLE_SOCKETS=1
CONF_ENABLE_FILES=1
CONF_DEBUG=0
CONF_CFLAGS=""
CONF_PUBLIC_MODE=0
CONF_DEV_BUILD=0

# Parse the given options
for arg in $@; do
	OPT_KEY="`echo $arg | cut -d= -f1`"
	OPT_VAL="`echo $arg | cut -d= -f2`"

	case "$OPT_KEY" in
		--prefix)
			CONF_PREFIX="$OPT_VAL"
			;;

		--sysroot)
			CONF_SYSROOT="$OPT_VAL"
			;;

		--help|-h)
			cat <<- END_OF_HELP
				This script sets configuration values for Gojira v0.0.1.

				Options:
				  -h,  --help             Display this help message and exit.
				       --prefix=[path]    Set the installation root to the given path.
				       --sysroot=[path]   Set the path for the system root. This is prepended
				                          to the PREFIX variable when copying files, and is
				                          useful for cross-compiling, chroot installs, etc.
				  -d,  --debug            Specify that this is a debug build. This option
				                          toggles some debugging messages.
				  -ds, --disable-sockets  Disable the built-in networking functions.
				  -df, --disable-files    Disable the built-in file functions.
				  -da, --disable-all      Disable everything extra, and just build the core
				                          interpreter.
				  -lo, --lib-only         Output only a shared object (.so)
				  -lo, --interp-only      Output only the interpreter executable
				  -s,  --static           Output a static executable.
				  -p,  --public           Specify that this will have input from untrusted sources,
				                          and should not perform/output possibly sensitive operations.
				  -D,  --dev              Specify that this is a development build. This changes the
				                          build name accordingly.
			END_OF_HELP
			exit 0
			;;

		--debug|-d)
			CONF_DEBUG=1
			;;

		--disable-sockets|-ds)
			CONF_ENABLE_SOCKETS=0
			;;

		--disable-files|-df)
			CONF_ENABLE_FILES=0
			;;

		--disable-all|-da)
			CONF_ENABLE_SOCKETS=0
			CONF_ENABLE_FILES=0
			;;

		--lib-only|-lo)
			CONF_TARGETS="lib"
			;;

		--interp-only|-io)
			CONF_TARGETS="out/gojira"
			;;

		--static|-s)
			CONF_CFLAGS="$CONF_FLAGS -static"
			;;

		--public-mode|-p)
			CONF_PUBLIC_MODE=1
			;;

		--dev|-D)
			BRANCHNAME="`git rev-parse --abbrev-ref HEAD`"
			CONF_BUILD_NAME="gojira dev build $BRANCHNAME@$CONF_VERSION"
			CONF_DEV_BUILD=1
			;;

		*)
			echo "configure: error: Unknown option \"$OPT_KEY\""
			exit 1
	esac
done;

echo "BUILD_NAME = $CONF_BUILD_NAME"
echo "TARGETS    = $CONF_TARGETS"
echo "PREFIX     = $CONF_PREFIX"
echo "SYSROOT    = $CONF_SYSROOT"
echo "DEV_BUILD  = $CONF_DEV_BUILD"
echo "Full install path: $CONF_SYSROOT$CONF_PREFIX"

# Write the options to the makefile
echo "Generating makefile..."
echo "PREFIX=$CONF_PREFIX"   >  Makefile
echo "SYSROOT=$CONF_SYSROOT" >> Makefile
echo "CONF_TARGETS=$CONF_TARGETS" >> Makefile
echo "CONF_CFLAGS=$CONF_CFLAGS" >> Makefile
cat Makefile.conf >> Makefile

# Set flags in config.h
echo "Generating config.h..."
sed "s#SOME_PREFIX_HERE#$CONF_PREFIX/share/gojira#" < include/gojira/config.h.tmp > include/gojira/config.h
echo "#define GOJIRA_ENABLE_SOCKETS $CONF_ENABLE_SOCKETS" >> include/gojira/config.h
echo "#define GOJIRA_ENABLE_FILES $CONF_ENABLE_FILES" >> include/gojira/config.h
echo "#define GOJIRA_DEBUG $CONF_DEBUG" >> include/gojira/config.h
echo "#define GOJIRA_PUBLIC_MODE $CONF_PUBLIC_MODE" >> include/gojira/config.h
echo "#define GOJIRA_BUILD_NAME \"$CONF_BUILD_NAME\"" >> include/gojira/config.h
echo "#endif" >> include/gojira/config.h

# And we're finished
echo "Done"