config: select python exe

spawn Python directly instead of the debugger script,
which fixes an issue on Windows.

Fixes #4.

Author: dpo

lib/python-debugger-view.coffee

@@ -104,9 +104,12 @@ class PythonDebuggerView extends View
     @addOutput(data_str.trim())
 
   runBackendDebugger: ->
-    args = [@debuggedFileName]
+    args = [path.join(@backendDebuggerPath, @backendDebuggerName)]
+    args.push(@debuggedFileName)
     args.push(arg) for arg in @debuggedFileArgs
-    @backendDebugger = spawn path.join(@backendDebuggerPath, @backendDebuggerName), args
+    python = atom.config.get "python-debugger.pythonExecutable"
+    console.log("python-debugger: using", python)
+    @backendDebugger = spawn python, args
 
     for breakpoint in @breakpointStore.breakpoints
       @backendDebugger.stdin.write(breakpoint.toCommand() + "\n")

lib/python-debugger.coffee

@@ -6,6 +6,12 @@ module.exports = PythonDebugger =
   pythonDebuggerView: null
   subscriptions: null
 
+  config:
+    pythonExecutable:
+      title: "Path to Python executable to use during debugging"
+      type: "string"
+      default: "python"
+
   createDebuggerView: (backendDebugger) ->
     unless @pythonDebuggerView?
       PythonDebuggerView = require "./python-debugger-view"

resources/atom_pdb.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 # This is a simple customized pdb that has no prompt and outputs the
 # name and line number of the file being debugged after each command.
 # It is appropriate for a IDE-like debugger package in a text editor,