linux-kernel - Re: [PATCH v2] checkkconfigsymbols.py: add --no-color option, don't print color to non-TTY

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Date:	Tue, 5 Jul 2016 10:45:26 +0200
From:	Valentin Rothberg <valentinrothberg@...il.com>
To:	Andrew Donnellan <andrew.donnellan@....ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	josh@...htriplett.org
Subject: Re: [PATCH v2] checkkconfigsymbols.py: add --no-color option, don't
 print color to non-TTY

Hi Andrew,

I am fine with this version of the patch, thanks.  Usually patches to
this script go through Greg's misc tree.

Best regards,
 Valentin

On Tue, Jul 5, 2016 at 9:47 AM, Andrew Donnellan
<andrew.donnellan@....ibm.com> wrote:
> Only print the ANSI colour escape codes if stdout is a TTY. Useful if
> redirecting output to a file or piping to another script.
>
> Also add a new option, --no-color, if the user wants to disable colour
> output for whatever reason.
>
> Signed-off-by: Andrew Donnellan <andrew.donnellan@....ibm.com>
>
> ---
>
> V1->V2:
>         - automatically detect non-TTYs and disable colour output.
>           Suggested by Josh Triplett
> ---
>  scripts/checkkconfigsymbols.py | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py
> index df643f6..b140fc9 100755
> --- a/scripts/checkkconfigsymbols.py
> +++ b/scripts/checkkconfigsymbols.py
> @@ -82,6 +82,11 @@ def parse_options():
>                        default=False,
>                        help="Reset current Git tree even when it's dirty.")
>
> +    parser.add_option('', '--no-color', dest='color', action='store_false',
> +                      default=True,
> +                      help="Don't print colored output. Default when not "
> +                           "outputting to a terminal.")
> +
>      (opts, _) = parser.parse_args()
>
>      if opts.commit and opts.diff:
> @@ -116,6 +121,9 @@ def main():
>      """Main function of this module."""
>      opts = parse_options()
>
> +    global color
> +    color = opts.color and sys.stdout.isatty()
> +
>      if opts.sim and not opts.commit and not opts.diff:
>          sims = find_sims(opts.sim, opts.ignore)
>          if sims:
> @@ -202,14 +210,14 @@ def yel(string):
>      """
>      Color %string yellow.
>      """
> -    return "\033[33m%s\033[0m" % string
> +    return "\033[33m%s\033[0m" % string if color else string
>
>
>  def red(string):
>      """
>      Color %string red.
>      """
> -    return "\033[31m%s\033[0m" % string
> +    return "\033[31m%s\033[0m" % string if color else string
>
>
>  def execute(cmd):
> --
> Andrew Donnellan              OzLabs, ADL Canberra
> andrew.donnellan@....ibm.com  IBM Australia Limited
>