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[bug-diffutils] bug#22067: bug#22067: bug#22067: bug#20062: bug#20062: [

From: Giuseppe Scrivano
Subject: [bug-diffutils] bug#22067: bug#22067: bug#22067: bug#20062: bug#20062: [PATCH] diff: add support for --color
Date: Thu, 11 Feb 2016 13:43:22 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Jim Meyering <address@hidden> writes:

> On Wed, Feb 10, 2016 at 8:45 AM, Giuseppe Scrivano <address@hidden> wrote:
>> Gisle Vanem <address@hidden> writes:
>>> Giuseppe Scrivano wrote:
>>>> thanks for your patches.  Is it fine for you if we keep bug-diffutils in
>>>> the loop?
>>> Sure. I forgot it was in the CC-list.
>>> Attached again; wincolor.c + diff-1.txt.
>>> Excused my diff format; I'm a "git n00b". Hope you figure it out.
>> cannot talk for the diff maintainers, but personally I would split it
>> two patches: one that fixes the build on Windows, I would not care to
>> disable them as in any case the user specifies when to use them or not;
>> and another patch that adds the support for colors on Windows.
>> In this way the first one could be applied immediately and there is more
>> time to review the second one which adds support for colors on Windows.
>> Anyway, let's wait for the maintainers' opinion about it.  My previous
>> patch is also waiting to be applied.
> Hi Giuseppe,
> The only thing missing from your infloop-fixing patch is an
> addition to the regression test suite. Can you contrive an
> example that induces the infinite recursion? It's not an
> absolute requirement in this case, but would be nice...

I can write one, but it will need a change in the code as well, since
the signals are installed only when outputting to a tty:

diff --git a/src/util.c b/src/util.c
index bf9ed97..be7d436 100644
--- a/src/util.c
+++ b/src/util.c
@@ -718,7 +718,7 @@ check_color_output (bool is_pipe)
   if (colors_enabled)
     parse_diff_color ();
-  if (output_is_tty)
+  if (output_is_tty || getenv ("DIFF_INSTALL_SIGNALS"))
     install_signal_handlers ();

Is that fine?


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