Fix tracebacks when the debug adapter dies very quickly

autoload/vimspector/internal/job.vim

@@ -30,7 +30,9 @@ endfunction
 function! s:_OnExit( channel, status ) abort
   echom 'Channel exit with status ' . a:status
   redraw
-  unlet s:job
+  if exists( 's:job' )
+    unlet s:job
+  endif
   py3 _vimspector_session.OnServerExit( vim.eval( 'a:status' ) )
 endfunction
 
@@ -61,12 +63,17 @@ function! vimspector#internal#job#StartDebugSession( config ) abort
         \                }
         \              )
 
-  echom 'Started job, status is: ' . job_status( s:job )
+  if !exists( 's:job' )
+    " The job died immediately after starting and we cleaned up
+    return v:false
+  endif
+
+  let status = job_status( s:job )
+
+  echom 'Started job, status is: ' . status
   redraw
 
-  if job_status( s:job ) !=# 'run'
-    echom 'Unable to start job, status is: ' . job_status( s:job )
-    redraw
+  if status !=# 'run'
     return v:false
   endif
 
@@ -140,7 +147,7 @@ function! vimspector#internal#job#StartCommandWithLog( cmd, category ) abort
         \ } ) )
 
   if job_status( s:commands[ a:category ][ index ] ) !=# 'run'
-    echom 'Unable to start job for ' . a:cmd
+    echom 'Unable to start job for ' . string( a:cmd )
     redraw
     return v:none
   endif

python3/vimspector/debug_session.py

@@ -879,7 +879,11 @@ class DebugSession( object ):
                        status )
     self.Clear()
 
-    self._connection.Reset()
+    if self._connection is not None:
+      # Can be None if the server dies _before_ StartDebugSession vim function
+      # returns
+      self._connection.Reset()
+
     self._stackTraceView.ConnectionClosed()
     self._variablesView.ConnectionClosed()
     self._outputView.ConnectionClosed()

python3/vimspector/output.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from vimspector import utils
+from vimspector import utils,install
 
 import vim
 import json
@@ -49,10 +49,7 @@ class OutputView( object ):
     for b in set( BUFFER_MAP.values() ):
       self._CreateBuffer( b )
 
-    self._CreateBuffer(
-      'Vimspector',
-      file_name = vim.eval( 'expand( "~/.vimspector.log" )' ) )
-
+    self._CreateBuffer( 'Vimspector', file_name = utils.LOG_FILE )
     self._ShowOutput( 'Console' )
 
   def Print( self, categroy, text ):
@@ -161,6 +158,10 @@ class OutputView( object ):
 
         if file_name is not None:
           assert cmd is None
+          if install.GetOS() == "windows":
+            # FIXME: Can't display fiels in windows (yet?)
+            return
+
           cmd = [ 'tail', '-F', '-n', '+1', '--', file_name ]
 
         if cmd is not None:

python3/vimspector/utils.py

@@ -23,8 +23,10 @@ import string
 import functools
 
 
-_log_handler = logging.FileHandler( os.path.expanduser( '~/.vimspector.log' ),
-                                    mode = 'w' )
+LOG_FILE = os.path.expanduser( os.path.join( '~', '.vimspector.log') )
+
+_log_handler = logging.FileHandler( LOG_FILE, mode = 'w' )
+
 _log_handler.setFormatter(
     logging.Formatter( '%(asctime)s - %(levelname)s - %(message)s' ) )