cmake: faster external projects build

without tests and archive download instead of git clone

Author: arteniioleg

CMakeLists.txt

@@ -7,7 +7,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 set(EXTERNAL_PROJECT_VERSION_GLFW 3.2.1)
-set(EXTERNAL_PROJECT_VERSION_GLM 0.9.9-a2)
+set(EXTERNAL_PROJECT_VERSION_GLM 0.9.9.0)
 set(EXTERNAL_PROJECT_VERSION_GSL v1.0.0)
 include(ExternalProjects.cmake)
 

ExternalProjects.cmake

@@ -7,28 +7,35 @@ add_custom_target(external_all)
 set_target_properties(external_all PROPERTIES EXCLUDE_FROM_ALL TRUE)
 
 ExternalProject_Add(external_glfw
-        GIT_REPOSITORY https://github.com/glfw/glfw.git
-        GIT_TAG ${EXTERNAL_PROJECT_VERSION_GLFW}
+        URL https://github.com/glfw/glfw/archive/${EXTERNAL_PROJECT_VERSION_GLFW}.tar.gz
         PREFIX ${EXTERNAL_PROJECTS_PREFIX}
-        CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_INSTALL_PREFIX}
+        CMAKE_ARGS
+            -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_INSTALL_PREFIX}
+            -DBUILD_SHARED_LIBS=OFF
+            -DGLFW_BUILD_EXAMPLES=OFF
+            -DGLFW_BUILD_TESTS=OFF
+            -DGLFW_BUILD_DOCS=OFF
+            -DGLFW_INSTALL=ON
         )
 set_target_properties(external_glfw PROPERTIES EXCLUDE_FROM_ALL TRUE)
 add_dependencies(external_all external_glfw)
 
 ExternalProject_Add(external_glm
-        GIT_REPOSITORY https://github.com/g-truc/glm.git
-        GIT_TAG ${EXTERNAL_PROJECT_VERSION_GLM}
+        URL https://github.com/g-truc/glm/archive/${EXTERNAL_PROJECT_VERSION_GLM}.tar.gz
         PREFIX ${EXTERNAL_PROJECTS_PREFIX}
-        CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_INSTALL_PREFIX}
+        CMAKE_ARGS
+            -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_INSTALL_PREFIX}
+            -DGLM_TEST_ENABLE=OFF
         )
 set_target_properties(external_glm PROPERTIES EXCLUDE_FROM_ALL TRUE)
 add_dependencies(external_all external_glm)
 
 ExternalProject_Add(external_gsl
-        GIT_REPOSITORY https://github.com/Microsoft/GSL.git
-        GIT_TAG ${EXTERNAL_PROJECT_VERSION_GSL}
+        URL https://github.com/Microsoft/GSL/archive/${EXTERNAL_PROJECT_VERSION_GSL}.tar.gz
         PREFIX ${EXTERNAL_PROJECTS_PREFIX}
-        CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_INSTALL_PREFIX} -DGSL_TEST=OFF # https://github.com/Microsoft/GSL/issues/525
+        CMAKE_ARGS
+            -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_INSTALL_PREFIX}
+            -DGSL_TEST=OFF
         )
 set_target_properties(external_gsl PROPERTIES EXCLUDE_FROM_ALL TRUE)
 add_dependencies(external_all external_gsl)