#!/bin/sh

set -e

BUILD_DIR="BUILD"
INSTALL_DIR="$(pwd)/install"
CFLAGS="-std=gnu99 -Wall -Wextra -pedantic -Werror -Wno-newline-eof -Wno-language-extension-token"
BUILD_SHARED=1
PTHREAD_SUPPORT=1
POSIX_SUPPORT=1
BUILD_PROGRAMS=1
SRC_DIR="src"
INCLUDE_DIR="include"
PROGRAMS_DIR="programs"
OUTPUT_NAME="libdcfg"

for arg in "$@"; do
	case $arg in
		--debug) CFLAGS="$CFLAGS -g -O0" ;;
		--release) CFLAGS="$CFLAGS -O2" ;;
		--no-pthread) PTHREAD_SUPPORT=0 ;;
		--no-posix) POSIX_SUPPORT=0 ;;
		--with-programs) BUILD_PROGRAMS=1 ;;
		--clean) rm -rf "$BUILD_DIR" "$INSTALL_DIR"; echo "Cleaned."; exit 0 ;;
	esac
done

# Setup directories
mkdir -p "$BUILD_DIR" "$INSTALL_DIR/lib" "$INSTALL_DIR/include" "$INSTALL_DIR/bin"

# Compiler and linker
CC=${CC:-cc}

if [ "$PTHREAD_SUPPORT" -eq 1 ]; then
	CFLAGS="$CFLAGS -DDCFG_PTHREAD_SUPPORT"
	LIBS="$LIBS -lpthread"
fi
if [ "$POSIX_SUPPORT" -eq 1 ]; then
	CFLAGS="$CFLAGS -DDCFG_POSIX_SUPPORT"
fi

echo "Building DCFG..."
cd "$BUILD_DIR"

set -x
# Shared library
$CC $CFLAGS -fPIC -shared "../$SRC_DIR/dcfg.c" -I"../$INCLUDE_DIR" -o "$OUTPUT_NAME.so" $LIBS

# Static library
$CC $CFLAGS -c "../$SRC_DIR/dcfg.c" -I"../$INCLUDE_DIR"
ar rcs "$OUTPUT_NAME.a" dcfg.o
set +x
#
# Build programs if requested
if [ "$BUILD_PROGRAMS" -eq 1 ]; then
	echo "Building example programs..."
	for src in "../$PROGRAMS_DIR"/*.c; do
		prog=$(basename "$src" .c)
		echo "Building $prog..."
		$CC $CFLAGS -c "$src" -I"../$INCLUDE_DIR"
		mkdir -p bin
		$CC $CFLAGS "$prog.o" "$OUTPUT_NAME.a" $LIBS -o "bin/$prog"
	done
fi

echo "Installing library..."
cp -r "../$INCLUDE_DIR/"* "$INSTALL_DIR/include/"
cp "$OUTPUT_NAME.so" "$INSTALL_DIR/lib/"
cp "$OUTPUT_NAME.a" "$INSTALL_DIR/lib/"
cp -r "bin/"* "$INSTALL_DIR/bin/"

echo "Done. Installed to $INSTALL_DIR"