launched script is now snap friendly.

CMakeLists.txt

@@ -85,7 +85,9 @@ install(DIRECTORY ${MOOSE_EXAMPLE_DIR}/
     PATTERN "*.pyc" EXCLUDE
     )
 
-configure_file( ${CMAKE_SOURCE_DIR}/cmake/moose.in ${CMAKE_BINARY_DIR}/moose )
+# Copy the command to launch moose.
+file(COPY ${CMAKE_SOURCE_DIR}/moose DESTINATION ${CMAKE_BINARY_DIR})
+
 install(PROGRAMS ${CMAKE_BINARY_DIR}/moose DESTINATION bin)
 
 ## UNINSTALL

cmake/moose.in

-#!/usr/bin/env bash
-
-(
-    cd @CMAKE_INSTALL_PREFIX@/lib/moose && python mgui.py & 
-)

moose

+#!/usr/bin/env bash
+SCRIPT_DIR="$(dirname "${BASH_SOURCE[0]}")"
+(
+    # Get the current path of script.
+    cd $SCRIPT_DIR/../lib/moose/gui && python mgui.py & 
+)