Merge branch 'symlink_at_install_time' into 'master'

Symlink at install time

See merge request !1

bash/CMakeLists.txt

+# Add commands that can use LIGO channel completion to this list
+set (COMPLETE_THESE_COMMANDS
+    ndscope
+    cdsutils
+    caget
+    caput
+    camonitor
+)
+
+set(COMPLETE_COMMAND_REGISTRATION)
+foreach(entry ${COMPLETE_THESE_COMMANDS})
+    set(COMPLETE_COMMAND_REGISTRATION "${COMPLETE_COMMAND_REGISTRATION}
+complete -F _channel_completion ${entry}")
+endforeach()
+
+set(COMPLETE_SCRIPT_DIR "${CMAKE_INSTALL_PREFIX}/share/bash-completion/completions")
+
 configure_file(ligo_channel_completion.in ${CMAKE_CURRENT_BINARY_DIR}/ligo_channel_completion @ONLY)
+configure_file(link_file.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/link_file.cmake @ONLY)
+
 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/ligo_channel_completion"
-        DESTINATION ${CMAKE_INSTALL_PREFIX}/share/bash-completion/completions)
\ No newline at end of file
+        DESTINATION ${COMPLETE_SCRIPT_DIR})
+
+install(SCRIPT ${CMAKE_CURRENT_BINARY_DIR}/link_file.cmake)

bash/ligo_channel_completion.in

@@ -20,8 +20,4 @@ _channel_completion()
 
 	return 0
 }
-complete -F _channel_completion ndscope
-complete -F _channel_completion cdsutils
-complete -F _channel_completion caget
-complete -F _channel_completion caput
-complete -F _channel_completion camonitor
+@COMPLETE_COMMAND_REGISTRATION@
\ No newline at end of file

bash/link_file.cmake.in

+message("external process DESTDIR=$ENV{DESTDIR} INSTALL_PREFIX=@CMAKE_INSTALL_PREFIX@ SCRIPT_DIR=@COMPLETE_SCRIPT_DIR@")
+
+# ideas from  https://stackoverflow.com/questions/35765106/symbolic-links-cmake
+set (LINK_ENTRIES "@COMPLETE_THESE_COMMANDS@")
+foreach (entry ${LINK_ENTRIES})
+    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ligo_channel_completion ${entry}
+        WORKING_DIRECTORY "$ENV{DESTDIR}@COMPLETE_SCRIPT_DIR@"
+    )
+    message("-- Created symlink: for ${entry}")
+endforeach()
+message("Working dir = $ENV{DESTDIR}@COMPLETE_SCRIPT_DIR@")
\ No newline at end of file