bitbake: lib/bb: support NO_COLOR

Red text on a black background can make it difficult for people with
visual impairments to read the text of error messages.  Respect the
presence of a non-empty NO_COLOR environment variable as an indication
the user doesn't want colorization to be automatically enabled.

See: https://no-color.org/
(Bitbake rev: d9986c54cd3d67ed1f7cb636b17696c8d0d4db85)

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/bitbake/lib/bb/msg.py b/bitbake/lib/bb/msg.py
index 93575d89c4..3e18596faa 100644
--- a/bitbake/lib/bb/msg.py
+++ b/bitbake/lib/bb/msg.py
@@ -230,7 +230,7 @@ def logger_create(name, output=sys.stderr, level=logging.INFO, preserve_handlers
     console = logging.StreamHandler(output)
     console.addFilter(bb.msg.LogFilterShowOnce())
     format = bb.msg.BBLogFormatter("%(levelname)s: %(message)s")
-    if color == 'always' or (color == 'auto' and output.isatty()):
+    if color == 'always' or (color == 'auto' and output.isatty() and os.environ.get('NO_COLOR', '') == ''):
         format.enable_color()
     console.setFormatter(format)
     if preserve_handlers: