A bit of vendoring for GO build

CMakeLists.txt

@@ -57,13 +57,20 @@ install(TARGETS libsplit DESTINATION ${DEST_DIR} CONFIGURATIONS Release)
 
 # Proper go build structure will be here
 set(GO_PATH "${CMAKE_BINARY_DIR}/go")
+configure_file ("${PROJECT_SOURCE_DIR}/cmake/version.go.in" "${GO_PATH}/src/libget2/version.go")
+include_directories("${PROJECT_BINARY_DIR}")
 
+find_package(Git REQUIRED)
 find_package(Go 1.4 REQUIRED)
 file(GLOB SRCS_LIBGET2 RELATIVE ${PROJECT_SOURCE_DIR} ${PROJECT_SOURCE_DIR}/libget2/*.go)
 add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/libget2.exe
-	DEPENDS ${SRCS_LIBGET2}
+	DEPENDS ${SRCS_LIBGET2} "${GO_PATH}/src/libget2/version.go"
+	# setting up source tree
 	COMMAND ${CMAKE_COMMAND} -E copy_directory ${PROJECT_SOURCE_DIR}/libget2/ ${GO_PATH}/src/libget2
-	COMMAND ${CMAKE_COMMAND} -E env GOROOT=${GO_ROOT} GOPATH=${GO_PATH} ${GO_EXECUTABLE} get golang.org/x/net/proxy
+	# vendoring packages (COMMAND ${CMAKE_COMMAND} -E env GOROOT=${GO_ROOT} GOPATH=${GO_PATH} ${GO_EXECUTABLE} get golang.org/x/net/proxy)
+	COMMAND ${CMAKE_COMMAND} -E env ${GIT_EXECUTABLE} clone https://go.googlesource.com/net go/src/golang.org/x/net
+	COMMAND ${CMAKE_COMMAND} -E env ${GIT_EXECUTABLE} --git-dir ${GO_PATH}/src/golang.org/x/net/.git --work-tree ${GO_PATH}/src/golang.org/x/net checkout --detach db8e4de5b2d6653f66aea53094624468caad15d2
+	# Building
 	COMMAND ${CMAKE_COMMAND} -E env GOROOT=${GO_ROOT} GOPATH=${GO_PATH} ${GO_EXECUTABLE} build libget2
 	COMMENT "Building GO program")
 add_custom_target(libget2 ALL DEPENDS ${CMAKE_BINARY_DIR}/libget2.exe)

cmake/version.go.in

@@ -0,0 +1,6 @@
+package main
+
+func getVersion() string {
+	return "@PRJ_VERSION_MAJOR@.@PRJ_VERSION_MINOR@"
+}
+

libget2/main.go

@@ -335,7 +335,7 @@ func getFiles(files []string, url, dest string) (err error) {
 
 func main() {
 	flag.Usage = func() {
-		fmt.Fprintf(os.Stderr, "\nTool to download library updates\nVersion 2.0\n\n")
+		fmt.Fprintf(os.Stderr, "\nTool to download library updates\nVersion %s\n\n", getVersion())
 		fmt.Fprintf(os.Stderr, "Usage: %s [options]\n\n", os.Args[0])
 		flag.PrintDefaults()
 	}