some install fixes, now I dont see the INSTALL target on projects using the prebuilt-SDK

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

CMakeLists.txt

@@ -132,7 +132,7 @@ ly_delayed_generate_runtime_dependencies()
 ly_test_impact_post_step()
 
 # 7. Generate the O3DE find file and setup install locations for scripts, tools, assets etc., required by the engine
-if(NOT INSTALLED_ENGINE)
+if(LY_INSTALL_ENABLED)
     # 8. Generate the O3DE find file and setup install locations for scripts, tools, assets etc., required by the engine
     ly_setup_o3de_install()
     # 9. CPack information (to be included after install)

Code/LauncherUnified/CMakeLists.txt

@@ -111,6 +111,7 @@ ly_install_directory(
         Platform/${PAL_PLATFORM_NAME}
         Platform/Common
     DESTINATION LauncherGenerator/Platform
+    VERBATIM
 )
 ly_install_files(
     FILES FindLauncherGenerator.cmake

cmake/3rdParty.cmake

@@ -306,20 +306,10 @@ endfunction()
 function(ly_install_external_target 3RDPARTY_ROOT_DIRECTORY)
 
     # Install the Find file to our <install_location>/cmake directory
-    install(FILES ${CMAKE_CURRENT_LIST_FILE}
-        DESTINATION cmake
+    ly_install_files(FILES ${CMAKE_CURRENT_LIST_FILE}
+        DESTINATION cmake/3rdParty
     )
-
-    # We only want to install external targets that are part of our source tree
-    # Checking for relative path beginning with "../" also works when the path
-    # given is on another drive letter on windows(i.e., RELATIVE_PATH returns an absolute path)
-    file(RELATIVE_PATH rel_path ${CMAKE_SOURCE_DIR} ${3RDPARTY_ROOT_DIRECTORY})
-    if (NOT ${rel_path} MATCHES "^../")
-        get_filename_component(rel_path ${rel_path} DIRECTORY)
-        install(DIRECTORY ${3RDPARTY_ROOT_DIRECTORY}
-            DESTINATION ${rel_path}
-        )
-    endif()
+    ly_install_directory(DIRECTORIES ${3RDPARTY_ROOT_DIRECTORY})
 
 endfunction()
 

cmake/Install.cmake

@@ -6,7 +6,12 @@
 #
 #
 
-if(NOT INSTALLED_ENGINE)
+ly_set(LY_INSTALL_ENABLED TRUE)
+if(INSTALLED_ENGINE)
+    ly_set(LY_INSTALL_ENABLED FALSE)
+endif()
+
+if(LY_INSTALL_ENABLED)
     ly_get_absolute_pal_filename(pal_dir ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Platform/${PAL_PLATFORM_NAME})
     include(${pal_dir}/Install_${PAL_PLATFORM_NAME_LOWERCASE}.cmake)
 endif()
@@ -27,6 +32,10 @@ endif()
 #
 function(ly_install_directory)
 
+    if(NOT LY_INSTALL_ENABLED)
+        return()
+    endif()
+
     set(options VERBATIM)
     set(oneValueArgs DESTINATION)
     set(multiValueArgs DIRECTORIES EXCLUDE_PATTERNS)
@@ -91,6 +100,10 @@ endfunction()
 #
 function(ly_install_files)
 
+    if(NOT LY_INSTALL_ENABLED)
+        return()
+    endif()
+
     set(options PROGRAMS)
     set(oneValueArgs DESTINATION)
     set(multiValueArgs FILES)