Merge pull request #205 from layus/sbt

Remove the need for sbt during 'make install'

Author: sjmackenzie

bootcompiler/CMakeLists.txt

@@ -10,12 +10,15 @@ set(SBT_JAVA_OPTS
 set(SBT "${Java_JAVA_EXECUTABLE}" ${SBT_JAVA_OPTS} -Dfile.encoding=UTF-8
   -jar "${CMAKE_CURRENT_SOURCE_DIR}/sbt-launch.jar")
 
-add_custom_target(bootcompiler
-  ALL
+file(GLOB_RECURSE bootcompiler_sources src/*)
+add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/bootcompiler.jar"
   COMMAND ${SBT} one-jar
-  COMMAND ${CMAKE_COMMAND} -E copy_if_different
+  COMMAND ${CMAKE_COMMAND} -E copy
     "${CMAKE_CURRENT_SOURCE_DIR}/target/scala-2.9.1/bootcompiler_2.9.1-2.0-SNAPSHOT-one-jar.jar"
     "${CMAKE_CURRENT_BINARY_DIR}/bootcompiler.jar"
   WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+  DEPENDS "sbt-launch.jar" "build.sbt" "project/plugins.sbt" ${bootcompiler_sources}
   COMMENT "Building the bootcompiler"
   VERBATIM)
+
+add_custom_target(bootcompiler DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/bootcompiler.jar")