Make build_deb.sh script to build libraries and binaries separately

Also add usage help and a few code cleanup

scripts/build_deb.sh

@@ -6,15 +6,44 @@
 # the Free Software Foundation; either version 3 of the License, or
 # (at your option) any later version.
 
-if [ -d .git ]; then
-	echo Please run this script in a clean place.
-	echo e.g.
-	echo "    mkdir -p ~/build-area/"
-	echo "    cp $0 ~/build-area/"
-	echo "    cd ~/build-area"
-	echo "    ./$(basename $0)"
-	exit
-fi
+help_usage() {
+cat << EOT
+
+Build shadowsocks-libev and its dependencies
+Usage:
+	$(basename $0) [--help|-h] [lib|bin|all]
+
+	--help|-h	Show this usage.
+	lib		Build library packages only.
+	bin		Build binary packages only.
+			However, you need the libraries built previously, in current working directory.
+			For advanced user only.
+	all		Build both binary and library packages (default).
+			The safe choice for everyone.
+
+Please run this script in a clean place.
+e.g.
+	mkdir -p ~/build-area
+	cd ~/build-area
+	ln -s $(readlink -f $0) .
+	./$(basename $0)
+
+EOT
+exit
+}
+
+help_lib() {
+cat << EOT
+
+Failed to install required library:
+	$1
+You can try to fix it by:
+
+	$0 lib
+
+EOT
+exit
+}
 
 apt_init() {
 	DEPS="$1"
@@ -41,12 +70,10 @@ apt_init() {
 # Cleanup
 apt_clean() {
 	sudo apt-get purge -y $DEPS $DEPS_BPO debhelper \
-		libbloom-dev libcork-dev libcorkipset-dev libmbedtls-dev \
-		libsodium-dev libbloom-build-deps simple-obfs-build-deps \
-		shadowsocks-libev-build-deps
-	sudo apt-get purge -y libcork-build-deps libcorkipset-build-deps
-	sudo apt-get purge -y libsodium-build-deps
-	sudo apt-get purge -y mbedtls-build-deps
+		libbloom-dev libcork-dev libcorkipset-dev libmbedtls-dev libsodium-dev
+	sudo apt-get purge -y libcork-build-deps libcorkipset-build-deps \
+		libbloom-build-deps libsodium-build-deps mbedtls-build-deps
+	sudo apt-get purge -y simple-obfs-build-deps shadowsocks-libev-build-deps
 	sudo apt-get autoremove -y
 }
 
@@ -96,39 +123,65 @@ dsc_build() {
 # Build and install libcork deb
 build_install_libcork() {
 	BRANCH=$1
-	gbp_build https://github.com/rogers0/libcork $BRANCH
+	if [ $BUILD_LIB -eq 1 ]; then
+		gbp_build https://github.com/rogers0/libcork $BRANCH
+	else
+		ls libcork-dev_*.deb libcork16_*.deb 2>&1 > /dev/null ||
+			help_lib "libcork-dev libcork16"
+	fi
 	sudo dpkg -i libcork-dev_*.deb libcork16_*.deb
 }
 
 # Build and install libcorkipset deb
 build_install_libcorkipset() {
 	BRANCH=$1
-	gbp_build https://github.com/rogers0/libcorkipset $BRANCH
+	if [ $BUILD_LIB -eq 1 ]; then
+		gbp_build https://github.com/rogers0/libcorkipset $BRANCH
+	else
+		ls libcorkipset-dev_*.deb libcorkipset1_*.deb 2>&1 > /dev/null ||
+			help_lib "libcorkipset-dev libcorkipset1"
+	fi
 	sudo dpkg -i libcorkipset-dev_*.deb libcorkipset1_*.deb
 }
 
 # Build libmbedtls deb
 build_install_libmbedtls() {
 	BRANCH=$1
-	gbp_build https://anonscm.debian.org/git/collab-maint/mbedtls.git $BRANCH
+	if [ $BUILD_LIB -eq 1 ]; then
+		gbp_build https://anonscm.debian.org/git/collab-maint/mbedtls.git $BRANCH
+	else
+		ls libmbed*.deb 2>&1 > /dev/null ||
+			help_lib libmbedtls
+	fi
 	sudo dpkg -i libmbed*.deb
 }
 
 # Build libsodium deb
 build_install_libsodium() {
-	dsc_build http://httpredir.debian.org/debian/pool/main/libs/libsodium/libsodium_1.0.11-1~bpo8+1.dsc
+	if [ $BUILD_LIB -eq 1 ]; then
+		dsc_build http://httpredir.debian.org/debian/pool/main/libs/libsodium/libsodium_1.0.11-1~bpo8+1.dsc
+	else
+		ls libsodium*.deb 2>&1 > /dev/null ||
+			help_lib libsodium
+	fi
 	sudo dpkg -i libsodium*.deb
 }
 
 # Build libbloom deb
 build_install_libbloom() {
 	BRANCH=$1
-	gbp_build https://github.com/rogers0/libbloom $BRANCH
+	if [ $BUILD_LIB -eq 1 ]; then
+		gbp_build https://github.com/rogers0/libbloom $BRANCH
+	else
+		ls libbloom-dev_*.deb libbloom1_*.deb 2>&1 > /dev/null ||
+			help_lib "libbloom-dev libbloom1"
+	fi
 	sudo dpkg -i libbloom-dev_*.deb libbloom1_*.deb
 }
 
 # Add patch to work on system with debhelper 9 only
 patch_sslibev_dh9() {
+if [ $BUILD_BIN -eq 1 ]; then
 	BRANCH=$1
 	gbp clone --pristine-tar https://anonscm.debian.org/git/collab-maint/shadowsocks-libev.git
 	cd shadowsocks-libev
@@ -139,49 +192,79 @@ patch_sslibev_dh9() {
 	git add -u
 	git commit -m "Patch to work with ubuntu trusty (14.04)"
 	cd -
+fi
 }
 
 # Build and install shadowsocks-libev deb
 build_install_sslibev() {
+if [ $BUILD_BIN -eq 1 ]; then
 	BRANCH=$1
 	gbp_build https://anonscm.debian.org/git/collab-maint/shadowsocks-libev.git $BRANCH
 	sudo dpkg -i shadowsocks-libev_*.deb
 	sudo apt-get install -fy
+fi
 }
 
 # Build and install simple-obfs
 build_install_simpleobfs() {
+if [ $BUILD_BIN -eq 1 ]; then
 	BRANCH=$1
 	git_build https://github.com/rogers0/simple-obfs $BRANCH
 	sudo dpkg -i simple-obfs_*.deb
 	sudo apt-get install -fy
+fi
 }
 
 export XZ_DEFAULTS=--memlimit=128MiB
 
 OSID=$(grep ^ID= /etc/os-release|cut -d= -f2)
 OSVER=$(lsb_release -cs)
+BUILD_LIB=0
+BUILD_BIN=0
+
+case "$1" in
+--help|-h)
+	help_usage
+	;;
+lib)
+	BUILD_LIB=1
+	;;
+bin)
+	BUILD_BIN=1
+	;;
+all|"")
+	BUILD_LIB=1
+	BUILD_BIN=1
+	;;
+*)
+	echo Parameter error, exiting ...
+	exit
+esac
+
+# Exit if in a git repo
+[ -d .git ] && help_usage
+
+case "$OSVER" in
+jessie)
+	BPO="debhelper libsodium-dev"
+	;;
+xenial)
+	BPO=debhelper
+	;;
+esac
+apt_init "git-buildpackage equivs" "$BPO"
 
 case "$OSVER" in
 wheezy|precise)
 	echo Sorry, your system $OSID/$OSVER is not supported.
 	;;
-jessie)
-	apt_init "git-buildpackage equivs" "debhelper libsodium-dev"
-	build_install_libbloom exp1
-	build_install_sslibev exp1
-	build_install_simpleobfs exp1
-	apt_clean
-	;;
-stretch|unstable|sid)
-	apt_init "git-buildpackage equivs"
+jessie|stretch|unstable|sid|zesty)
 	build_install_libbloom exp1
 	build_install_sslibev exp1
 	build_install_simpleobfs exp1
 	apt_clean
 	;;
 trusty)
-	apt_init "git-buildpackage equivs"
 	build_install_libcork trusty
 	build_install_libcorkipset trusty
 	build_install_libmbedtls debian/jessie-backports
@@ -192,17 +275,7 @@ trusty)
 	build_install_simpleobfs exp1_trusty
 	apt_clean
 	;;
-xenial)
-	apt_init "git-buildpackage equivs" debhelper
-	build_install_libcork debian
-	build_install_libcorkipset debian
-	build_install_libbloom exp1
-	build_install_sslibev exp1
-	build_install_simpleobfs exp1
-	apt_clean
-	;;
-yakkety)
-	apt_init "git-buildpackage equivs"
+xenial|yakkety)
 	build_install_libcork debian
 	build_install_libcorkipset debian
 	build_install_libbloom exp1