rbutil: cmake: Make linuxdeploy download a global target.

That way we won't get duplicated targets when the deploy function is
used for multiple targets.

Change-Id: Ie14fdd74fcc496647c3c041ae2fcf902a3cb15fa

utils/cmake/deploy.cmake

@@ -25,26 +25,28 @@ endif()
 
 # Linux: Build AppImage
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
-    function(deploy_qt target qtbindir iconfile desktopfile dmgbuildcfg)
-        if("${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
-            message(WARNING "Deploying a Debug build.")
-        endif()
-
     set(LINUXDEPLOY ${CMAKE_BINARY_DIR}/linuxdeploy-x86_64.AppImage)
     set(LINUXDEPLOYQT ${CMAKE_BINARY_DIR}/linuxdeploy-plugin-qt-x86_64.AppImage)
     add_custom_command(
         COMMENT "Downloading linuxdeploy"
         OUTPUT ${LINUXDEPLOY}
-            OUTPUT ${LINUXDEPLOYQT}
+               ${LINUXDEPLOYQT}
         COMMAND ${CMAKE_COMMAND}
             -DOUTDIR=${CMAKE_BINARY_DIR}
             -DURL=https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
-                -P ${CMAKE_SOURCE_DIR}/cmake/download.cmake
+            -P ${CMAKE_CURRENT_LIST_DIR}/download.cmake
         COMMAND ${CMAKE_COMMAND}
             -DOUTDIR=${CMAKE_BINARY_DIR}
             -DURL=https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage
-                -P ${CMAKE_SOURCE_DIR}/cmake/download.cmake
+            -P ${CMAKE_CURRENT_LIST_DIR}/download.cmake
         )
+        # intermediate target needed to be able to get back to the actual file dependency.
+        add_custom_target(linuxdeploy DEPENDS ${LINUXDEPLOY})
+    function(deploy_qt target qtbindir iconfile desktopfile dmgbuildcfg)
+        if("${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
+            message(WARNING "Deploying a Debug build.")
+        endif()
+
         add_custom_command(
             OUTPUT ${CMAKE_BINARY_DIR}/${target}.AppImage
             COMMENT "Creating AppImage ${target}"
@@ -57,8 +59,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
                     --appdir=AppImage-${target}
                     --output=appimage
                     --verbosity=2
-            DEPENDS ${target}
-                    ${LINUXDEPLOY}
+            DEPENDS ${target} linuxdeploy
             )
         add_custom_target(deploy_${target}
             DEPENDS ${CMAKE_BINARY_DIR}/${target}.AppImage)