make pygments library optional

jc/cli.py

@@ -11,14 +11,19 @@ import importlib
 import textwrap
 import signal
 import json
+import jc
+import jc.appdirs as appdirs
+# make pygments import optional
+try:
     import pygments
     from pygments import highlight
     from pygments.style import Style
     from pygments.token import (Name, Number, String, Keyword)
     from pygments.lexers import JsonLexer
     from pygments.formatters import Terminal256Formatter
-import jc
-import jc.appdirs as appdirs
+    pygments_installed = True
+except Exception:
+    pygments_installed = False
 
 
 class info():
@@ -115,6 +120,7 @@ if os.path.isdir(local_parsers_dir):
 
 # We only support 2.3.0+, pygments changed color names in 2.4.0.
 # startswith is sufficient and avoids potential exceptions from split and int.
+if pygments_installed:
     if pygments.__version__.startswith('2.3.'):
         PYGMENT_COLOR = {
             'black': '#ansiblack',
@@ -438,6 +444,9 @@ def main():
     quiet = 'q' in options
     raw = 'r' in options
 
+    if not pygments_installed:
+        mono = True
+
     if help_me:
         print(helptext())
         sys.exit(0)