Disable color when redirecting or piping stdout

README.md

@@ -316,6 +316,8 @@ Color output is enabled by default in Refurb. To disable it, do one of the follo
 
 * Set `color = false` in the config file.
 
+* Pipe/redirect Refurb output to another program or file.
+
 ## Developing / Contributing
 
 ### Setup

refurb/settings.py

@@ -52,7 +52,7 @@ def __post_init__(self) -> None:
                 'refurb: "enable all" and "disable all" can\'t be used at the same time'  # noqa: E501
             )
 
-        if os.getenv("NO_COLOR"):
+        if os.getenv("NO_COLOR") or not sys.stdout.isatty():
             self.color = False
 
     @staticmethod

test/conftest.py

@@ -0,0 +1,10 @@
+from unittest.mock import patch
+import pytest
+
+@pytest.fixture(autouse=True)
+def fake_tty():
+    # Pytest doesnt run in a TTY, so the new TTY detection code is causing a lot of color related
+    # tests to fail. This hack makes it so color is always enabled, like it would in a normal TTY.
+    with patch("sys.stdout.isatty") as p:
+        p.return_value = True
+        yield p