Fail gracefully when --color is specified and pygments is not installed in patterncfg

1 files changed, 8 insertions, 1 deletions

diff --git a/patternutils/commands/patterncfg.py b/patternutils/commands/patterncfg.py
index 0115ed2..8f85b8f 100644
--- a/patternutils/commands/patterncfg.py
+++ b/patternutils/commands/patterncfg.py
@@ -136,12 +136,19 @@ def view(name: str, command: str, color: bool) -> None:
         click.secho("File not found!", fg="red", err=True)
         raise SystemExit
     else:
-        if color:
+        if color and has_pygments:
             if filename.endswith("jinja2"):
                 lexer = DjangoLexer
             else:
                 lexer = Python3Lexer
             text = highlight(text, lexer(), TerminalFormatter())
+        elif color and not has_pygments:
+            click.echo(
+                "Pygments is not installed!. Cannot colorize output.",
+                fg="red",
+                err=True,
+            )
+            raise SystemExit
         click.echo(text[:-1])