diff --git a/cmake/configure.cmake b/cmake/configure.cmake index a4f98ec7d4af652d0dd0650f4906696ff3a4efb9..7afab5d5344b704a9329e313a81379032ba0cc97 100644 --- a/cmake/configure.cmake +++ b/cmake/configure.cmake @@ -102,12 +102,19 @@ if(WITH_GOLANG) message(FATAL_ERROR "no glide executeble found: $ENV{GOPATH}/bin/glide") endif() - add_custom_target(go_vendor) - add_custom_command(TARGET go_vendor + # this command will only run when the file it depends is missing + # or has changed, or the output is missing. + add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/glide COMMAND env GOPATH=${GOPATH} ${GLIDE} install + COMMAND touch ${CMAKE_BINARY_DIR}/glide + DEPENDS ${PROJ_ROOT}/go/glide.lock WORKING_DIRECTORY "${PADDLE_IN_GOPATH}/go" - ) - add_dependencies(go_vendor go_path) + ) + + # depends on the custom command which outputs + # ${CMAKE_BINARY_DIR}/glide, the custom command does not need to + # run every time this target is built. + add_custom_target(go_vendor DEPENDS ${CMAKE_BINARY_DIR}/glide go_path) endif() endif(WITH_GOLANG)