no colors for powershell users

pipenv/patched/crayons.py

@@ -12,19 +12,34 @@ import os
 import re
 import sys
 
+import shellingham
 import colorama
 
 PY3 = sys.version_info[0] >= 3
 
 __all__ = (
-    'red', 'green', 'yellow', 'blue',
-    'black', 'magenta', 'cyan', 'white', 'normal',
-    'clean', 'disable',
+    "red",
+    "green",
+    "yellow",
+    "blue",
+    "black",
+    "magenta",
+    "cyan",
+    "white",
+    "normal",
+    "clean",
+    "disable",
 )
 
 COLORS = __all__[:-2]
 
-if 'get_ipython' in dir():
+is_ipython = "get_ipython" in dir()
+try:
+    is_powershell = "powershell" in shellingham.detect_shell()[0]
+except shellingham.ShellDetectionFailure:
+    pass
+
+if is_ipython or is_powershell:
     """
        when ipython is fired lot of variables like _oh, etc are used.
        There are so many ways to find current python interpreter is ipython.
@@ -37,16 +52,17 @@ else:
 
 class ColoredString(object):
     """Enhanced string for __len__ operations on Colored output."""
+
     def __init__(self, color, s, always_color=False, bold=False):
         super(ColoredString, self).__init__()
         if not PY3 and isinstance(s, unicode):
-            self.s = s.encode('utf-8')
+            self.s = s.encode("utf-8")
         else:
             self.s = s
         self.color = color
         self.always_color = always_color
         self.bold = bold
-        if os.environ.get('PIPENV_FORCE_COLOR'):
+        if os.environ.get("PIPENV_FORCE_COLOR"):
             self.always_color = True
 
     def __getattr__(self, att):
@@ -62,12 +78,19 @@ class ColoredString(object):
                 return [self._new(x) for x in result]
             else:
                 return result
+
         return func_help
 
     @property
     def color_str(self):
-        style = 'BRIGHT' if self.bold else 'NORMAL'
-        c = '%s%s%s%s%s' % (getattr(colorama.Fore, self.color), getattr(colorama.Style, style), self.s, colorama.Fore.RESET, getattr(colorama.Style, 'NORMAL'))
+        style = "BRIGHT" if self.bold else "NORMAL"
+        c = "%s%s%s%s%s" % (
+            getattr(colorama.Fore, self.color),
+            getattr(colorama.Style, style),
+            self.s,
+            colorama.Fore.RESET,
+            getattr(colorama.Style, "NORMAL"),
+        )
 
         if self.always_color:
             return c
@@ -85,12 +108,13 @@ class ColoredString(object):
     def __unicode__(self):
         value = self.color_str
         if isinstance(value, bytes):
-            return value.decode('utf8')
+            return value.decode("utf8")
         return value
 
     if PY3:
         __str__ = __unicode__
     else:
+
         def __str__(self):
             return self.color_str
 
@@ -104,57 +128,59 @@ class ColoredString(object):
         return str(other) + str(self.color_str)
 
     def __mul__(self, other):
-        return (self.color_str * other)
+        return self.color_str * other
 
     def _new(self, s):
         return ColoredString(self.color, s)
 
 
 def clean(s):
-    strip = re.compile("([^-_a-zA-Z0-9!@#%&=,/'\";:~`\$\^\*\(\)\+\[\]\.\{\}\|\?\<\>\\]+|[^\s]+)")
-    txt = strip.sub('', str(s))
+    strip = re.compile(
+        "([^-_a-zA-Z0-9!@#%&=,/'\";:~`\$\^\*\(\)\+\[\]\.\{\}\|\?\<\>\\]+|[^\s]+)"
+    )
+    txt = strip.sub("", str(s))
 
-    strip = re.compile(r'\[\d+m')
-    txt = strip.sub('', txt)
+    strip = re.compile(r"\[\d+m")
+    txt = strip.sub("", txt)
 
     return txt
 
 
 def normal(string, always=False, bold=False):
-    return ColoredString('RESET', string, always_color=always, bold=bold)
+    return ColoredString("RESET", string, always_color=always, bold=bold)
 
 
 def black(string, always=False, bold=False):
-    return ColoredString('BLACK', string, always_color=always, bold=bold)
+    return ColoredString("BLACK", string, always_color=always, bold=bold)
 
 
 def red(string, always=False, bold=False):
-    return ColoredString('RED', string, always_color=always, bold=bold)
+    return ColoredString("RED", string, always_color=always, bold=bold)
 
 
 def green(string, always=False, bold=False):
-    return ColoredString('GREEN', string, always_color=always, bold=bold)
+    return ColoredString("GREEN", string, always_color=always, bold=bold)
 
 
 def yellow(string, always=False, bold=False):
-    return ColoredString('YELLOW', string, always_color=always, bold=bold)
+    return ColoredString("YELLOW", string, always_color=always, bold=bold)
 
 
 def blue(string, always=False, bold=False):
-    return ColoredString('BLUE', string, always_color=always, bold=bold)
+    return ColoredString("BLUE", string, always_color=always, bold=bold)
 
 
 def magenta(string, always=False, bold=False):
-    return ColoredString('MAGENTA', string, always_color=always, bold=bold)
+    return ColoredString("MAGENTA", string, always_color=always, bold=bold)
 
 
 def cyan(string, always=False, bold=False):
-    return ColoredString('CYAN', string, always_color=always, bold=bold)
+    return ColoredString("CYAN", string, always_color=always, bold=bold)
 
 
 def white(string, always=False, bold=False):
     # This upsets people...
-    return ColoredString('WHITE', string, always_color=always, bold=bold)
+    return ColoredString("WHITE", string, always_color=always, bold=bold)
 
 
 def disable():