Fix jarun#203: support env var DISABLE_PROMPT_COLOR

This reverts commit cf3137e.

Author: jarun

README.md

@@ -395,6 +395,10 @@ Please consult the manual of your terminal emulator as well as the [Wikipedia ar
 
 3. Google News service is not available if the language is `dk` (Denmark), `fi` (Finland) or `is` (Iceland). Use `-l en`. Please refer to #187 for more information.
 
+4. Some users have reported problems with a colored omniprompt (refer to issue [#203](https://github.com/jarun/googler/issues/203)) with iTerm2 on OS X. To force a plain omniprompt:
+
+       export DISABLE_PROMPT_COLOR=1
+
 ### Notes
 
 1. Initially I raised a pull request but I could see that the last change was made 7 years earlier. In addition, there is no GitHub activity from the original author [Henri Hakkinen](https://github.com/henux) in past year. I have created this independent repo for the project with the name `googler`. I retained the original copyright information.

googler

@@ -1770,6 +1770,8 @@ class GooglerCmd(object):
         self._results_filtered = False
         self._urltable = {}
 
+        self.promptcolor = True if os.getenv('DISABLE_PROMPT_COLOR') is None else False
+
     @property
     def options(self):
         """Current options."""
@@ -1905,7 +1907,7 @@ class GooglerCmd(object):
         """
         colors = self.colors
         message = 'googler (? for help)'
-        prompt = (colors.prompt + message + colors.reset + ' ') if colors else (message + ': ')
+        prompt = (colors.prompt + message + colors.reset + ' ') if (colors and self.promptcolor) else (message + ': ')
         enter_count = 0
         while True:
             try:

googler.1

@@ -228,6 +228,9 @@ Overrides the default browser. Ref:
 .BI GOOGLER_COLORS
 Refer to the \fBCOLORS\fR section.
 .TP
+.BI DISABLE_PROMPT_COLOR
+Force a plain omniprompt if you are facing issues with colors at the prompt.
+.TP
 .BI https_proxy
 Refer to the \fB--proxy\fR option.
 .SH EXAMPLES