Add realgud:pdb-remote for remote kinds of pdb execution, e.g. telnet

hostname port-number. This hasn't been tested.

realgud/debugger/pdb/core.el

@@ -36,6 +36,9 @@
 (defvar realgud:pdb-minibuffer-history nil
   "minibuffer history list for the command `pdb'.")
 
+(defvar realgud:pdb-remote-minibuffer-history nil
+  "minibuffer history list for the command `pdb-remote'.")
+
 (easy-mmode-defmap pdb-minibuffer-local-map
   '(("\C-i" . comint-dynamic-complete-filename))
   "Keymap for minibuffer prompting of gud startup command."
@@ -142,7 +145,29 @@ Note that the script name path has been expanded via `expand-file-name'.
 	   )))
       (list interpreter-args debugger-args script-args annotate-p))))
 
-;; To silence Warning: reference to free variable
+(defun pdb-parse-remote-cmd-args (orig-args)
+    "Parse command line ORIG-ARGS
+ORIG-ARGS should contain a tokenized list of the command line to run.
+
+We return the a list containing:
+* the command processor (e.g. python) and it's arguments if any - a list of strings
+* the name of the debugger given (e.g. pdb) and its arguments - a list of strings
+* the script name and its arguments - list of strings
+* nil
+
+For example for the following input:
+  (map 'list 'symbol-name
+   '(telnet localhost 6900))
+
+we might return:
+   ((\"telnet\" \"localhost\" \"6900\") (\"pdb\") (\"\") nil)
+
+Note that the script name path has been expanded via `expand-file-name'.
+"
+    (list orig-args '("pdb") '("") nil)
+  )
+
+  ;; To silence Warning: reference to free variable
 (defvar realgud:pdb-command-name)
 
 (defun pdb-suggest-invocation (debugger-name)

realgud/debugger/pdb/pdb.el

@@ -75,6 +75,34 @@ fringe and marginal icons.
   )
 
 
+;;;###autoload
+(defun realgud:pdb-remote (&optional opt-cmd-line no-reset)
+  "Invoke the pdb Python debugger and start the Emacs user interface.
+
+String OPT-CMD-LINE specifies how to run pdb. You will be prompted
+for a command line is one isn't supplied.
+
+OPT-COMMAND-LINE is treated like a shell string; arguments are
+tokenized by `split-string-and-unquote'. The tokenized string is
+parsed by `pdb-parse-remote-cmd-args' and path elements found by that
+are expanded using `realgud:expand-file-name-if-exists'.
+
+Normally, command buffers are reused when the same debugger is
+reinvoked inside a command buffer with a similar command. If we
+discover that the buffer has prior command-buffer information and
+NO-RESET is nil, then that information which may point into other
+buffers and source buffers which may contain marks and fringe or
+marginal icons is reset. See `loc-changes-clear-buffer' to clear
+fringe and marginal icons.
+"
+  (interactive)
+  (realgud:run-debugger "pdb" 'pdb-remote-query-cmdline
+			'pdb-parse-remote-cmd-args
+			'realgud:pdb-remote-minibuffer-history
+			opt-cmd-line no-reset)
+  )
+
+
 (defalias 'pdb 'realgud:pdb)
 
 (provide-me "realgud-")