Add preliminary support for tracking dependencies

cmaked/CMakeLists.txt

@@ -20,6 +20,8 @@ SET (MOD_SRCS
 	CMakeDetermineDCompiler.cmake  
 	FindGDCPath.cmake
 	UseDDoc.cmake
+	UseDDeps.cmake
+	dependencies.cmake
 )
 
 SET (PLAT_SRCS

cmaked/UseDDeps.cmake

@@ -0,0 +1,66 @@
+# Dependency tracking for D
+#
+#  Copyright (c) 2010 Jens Mueller <jens.k.mueller@gmx.de>
+#
+# All rights reserved.
+#
+# See Copyright.txt for details.
+#
+
+macro(add_executable_with_dependencies _target)
+	# extract D source files from arguments
+	foreach(file ${ARGV})
+		if(${file} MATCHES "\\.d$")
+			list(APPEND d_source_files ${file})
+		endif()
+	endforeach()
+
+	#message("D files in arguments: ${d_source_files}")
+
+	foreach(file IN LISTS d_source_files)
+		set(source_file "${CMAKE_CURRENT_SOURCE_DIR}/${file}")
+		set(dependency_file "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${file}-depend.cmake")
+		set(dependency_files ${dependency_files} ${dependency_file})
+
+		#message("Checking dependencies for ${source_file}")
+		#message("Put into ${dependency_file}")
+		get_directory_property(include_dirs INCLUDE_DIRECTORIES)
+		foreach(include_dir IN LISTS include_dirs)
+			#message("Adding include directory ${include_dir}")
+			set(include_directories "-I${include_dir} ${include_directories}")
+		endforeach()
+
+		# TODO
+		# somehow I have to pass each argument on its own
+		# this fails e.g. if using ${CMAKE_D_FLAGS} in dependencies.cmake
+		# or if there is more than one include dir
+		execute_process(
+			COMMAND ${CMAKE_COMMAND}
+			-D "CMAKE_D_COMPILER:STRING=${CMAKE_D_COMPILER}"
+			-D "CMAKE_D_FLAGS:STRING=${CMAKE_D_FLAGS}"
+			-D "include_directories:STRING=${include_directories}"
+			-D "source_file:STRING=${source_file}"
+			-D "dependency_file:STRING=${dependency_file}"
+			-P "${CMAKE_ROOT}/Modules/dependencies.cmake" # TODO hard coded path
+			)
+
+		# load dependencies from file
+		include(${dependency_file})
+		#message("DEPENDENCIES ${D_DMD_DEPEND}")
+
+		add_custom_command(
+			OUTPUT ${dependency_file}
+			DEPENDS ${D_DMD_DEPEND}
+			COMMAND ${CMAKE_COMMAND}
+			-D "CMAKE_D_COMPILER:STRING=${CMAKE_D_COMPILER}"
+			-D "CMAKE_D_FLAGS:STRING=${CMAKE_D_FLAGS}"
+			-D "include_directories:STRING=${include_directories}"
+			-D "source_file:STRING=${source_file}"
+			-D "dependency_file:STRING=${dependency_file}"
+			-P "${CMAKE_ROOT}/Modules/dependencies.cmake" # TODO hard coded path
+			COMMENT "Scanning for dependencies"
+			)
+	endforeach()
+
+	add_executable(${ARGV} ${dependency_files})
+endmacro(add_executable_with_dependencies)

cmaked/dependencies.cmake

@@ -0,0 +1,47 @@
+#message("Adding dependencies")
+
+#message("CMAKE_D_FLAGS:  ${CMAKE_D_FLAGS} ")
+#message("CMAKE_D_COMPILER:  ${CMAKE_D_COMPILER} ")
+#message("include_directories:  ${include_directories} ")
+#message("source file ${source_file}")
+#message("dependency file ${dependency_file}")
+
+execute_process(COMMAND ${CMAKE_D_COMPILER} ${include_directories} -deps=${dependency_file}.tmp -o- ${source_file})
+#message("executing:  ${CMAKE_D_COMPILER} ${CMAKE_D_FLAGS} ${include_directories} -deps=${dependency_file}.tmp -o- ${source_file}")
+
+if(NOT EXISTS ${dependency_file})
+	file(WRITE ${dependency_file} "# Generated by: ${CMAKE_CURRENT_LIST_FILE}\nSET(D_DMD_DEPEND\n)\n\n")
+endif()
+
+file(READ ${dependency_file}.tmp depend_text)
+#message("DEPENDENCIES: ${depend_text}")
+
+# extract dependencies
+string(REGEX MATCHALL "\\([^)]*\\)" out ${depend_text})
+string(REGEX MATCHALL "[^()]+" out ${out})
+list(REMOVE_DUPLICATES out)
+list(SORT out)
+
+foreach(file ${out})
+	set(dependencies "${dependencies} \"${file}\"\n")
+endforeach()
+
+# write new dependencies to temporary file
+file(WRITE ${dependency_file}.tmp "# Generated by: ${CMAKE_CURRENT_LIST_FILE}\nSET(D_DMD_DEPEND\n ${dependencies})\n\n")
+
+# get old dependencies
+include(${dependency_file})
+set(old_dependencies ${D_DMD_DEPEND})
+# and the new dependencies from temporary file
+include(${dependency_file}.tmp)
+
+# did the dependencies change?
+if(NOT "${D_DMD_DEPEND}" STREQUAL "${old_dependencies}")
+	message("Dependencies changed. Need to build.")
+	execute_process(COMMAND ${CMAKE_COMMAND} -E touch ${source_file})
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} -E copy ${dependency_file}.tmp ${dependency_file})
+execute_process(COMMAND ${CMAKE_COMMAND} -E remove ${dependency_file}.tmp)
+
+#message("Finished dependencies")

tests/CMakeLists.txt

@@ -29,3 +29,4 @@ ADD_SUBDIRECTORY (app_5)
 ADD_SUBDIRECTORY (app_4)
 ADD_SUBDIRECTORY (app_6)
 ADD_SUBDIRECTORY (app_7)
+ADD_SUBDIRECTORY (app_8)

tests/app_8/CMakeLists.txt

@@ -0,0 +1,4 @@
+include(UseDDeps)
+
+include_directories(.)
+add_executable_with_dependencies(app_8 app_8.d)

tests/app_8/app_8.d

@@ -0,0 +1,9 @@
+// barebones app, depends on the standard library
+import std.stdio;
+import a;
+
+int main()
+{
+	writeln( "Hello World!" ); 
+	return 0;
+}