Add a reset command to undo all the UI and reset everything

autoload/vimspector.vim

@@ -19,16 +19,18 @@ let s:save_cpo = &cpo
 set cpo&vim
 " }}}
 
-  py3 << EOF
-from vimspector import debug_session
-_vimspector_session = debug_session.DebugSession()
-EOF
+
+call vimspector#internal#state#Reset()
 
 " TODO: Test function
 function! vimspector#Launch() abort
   py3 _vimspector_session.Start()
 endfunction
 
+function! vimspector#Reset() abort
+  py3 _vimspector_session.Reset()
+endfunction
+
 function! vimspector#Restart() abort
   py3 _vimspector_session.Restart()
 endfunction

autoload/vimspector/internal/job.vim

@@ -103,6 +103,12 @@ function! vimspector#internal#job#StopDebugSession() abort
   unlet s:job
 endfunction
 
+function! vimspector#internal#job#Reset() abort
+  if exists( 's:job' )
+    call vimspector#internal#job#StopDebugSession()
+  endif
+endfunction
+
 " Boilerplate {{{
 let &cpo=s:save_cpo
 unlet s:save_cpo

autoload/vimspector/internal/state.vim

@@ -0,0 +1,32 @@
+" vimspector - A multi-language debugging system for Vim
+" Copyright 2018 Ben Jackson
+"
+" Licensed under the Apache License, Version 2.0 (the "License");
+" you may not use this file except in compliance with the License.
+" You may obtain a copy of the License at
+"
+"   http://www.apache.org/licenses/LICENSE-2.0
+"
+" Unless required by applicable law or agreed to in writing, software
+" distributed under the License is distributed on an "AS IS" BASIS,
+" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+" See the License for the specific language governing permissions and
+" limitations under the License.
+
+
+" Boilerplate {{{
+let s:save_cpo = &cpo
+set cpo&vim
+" }}}
+
+function! vimspector#internal#state#Reset()
+    py3 << EOF
+from vimspector import debug_session
+_vimspector_session = debug_session.DebugSession()
+EOF
+endfunction
+
+" Boilerplate {{{
+let &cpo=s:save_cpo
+unlet s:save_cpo
+" }}}