Try to use git hash in crash reports

gui/qt/exception_window.py

@@ -25,6 +25,9 @@ import json
 import locale
 import platform
 import traceback
+import os
+import sys
+import subprocess
 
 import requests
 from PyQt5.QtCore import QObject
@@ -33,7 +36,6 @@ from PyQt5.QtGui import QIcon
 from PyQt5.QtWidgets import *
 
 from electrum.i18n import _
-import sys
 from electrum import ELECTRUM_VERSION, bitcoin
 
 issue_template = """<h2>Traceback</h2>
@@ -165,6 +167,11 @@ class Exception_Window(QWidget):
         except:
             # Maybe the wallet isn't loaded yet
             pass
+        try:
+            args["app_version"] = self.get_git_version()
+        except:
+            # This is probably not running from source
+            pass
         return args
 
     def get_report_string(self):
@@ -172,6 +179,11 @@ class Exception_Window(QWidget):
         info["traceback"] = "".join(traceback.format_exception(*self.exc_args))
         return issue_template.format(**info)
 
+    @staticmethod
+    def get_git_version():
+        dir = os.path.dirname(os.path.realpath(sys.argv[0]))
+        return subprocess.check_output(['git', 'describe', '--always'], cwd=dir)
+
 
 def _show_window(*args):
     if not Exception_Window._active_window: