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List:       git
Subject:    Re: [BUG] git bisect colour output contrary to configuration
From:       Ævar Arnfjörð Bjarmason <avarab () gmail ! com>
Date:       2017-12-29 22:05:52
Message-ID: 87zi616vgf.fsf () evledraar ! gmail ! com
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On Fri, Dec 29 2017, zefram@fysh.org jotted:

> My ~/.gitconfig sets color.ui=never, which should prevent attempts
> at colouring output from all git commands.  I do not have any git
> configuration enabling colour in any situation (such as for specific
> commands).  But when a git bisect completes, the output identifying
> the first bad commit includes escape sequences to colour the "commit
> 3e6..." line yellow.  Excerpt of strace output (with many irrelevant
> lines omitted):
> 
> 23851 write(1, "3e6fc602e433dbd76941ac0ef7a438a77fbe9a05 is the first bad \
> commit\n", 65) = 65 23851 open("/home/zefram/.gitconfig", O_RDONLY) = 3
> 23851 read(3, "[user]\n\tname = Zefram\n\temail = zefram@fysh.org\n\tsigningkey = \
> 0x8E1E1EC1\n\n[color]\n\tui = never\n", 4096) = 93 23851 write(1, "\33[33mcommit \
> 3e6fc602e433dbd76941ac0ef7a438a77fbe9a05\33[m\n", 56) = 56 
> Given the configuration, that line should be free of escape sequences.
> 
> I'm mainly using git 2.1.4 via Debian, but I've also
> reproduced this problem with the latest from git.git (commit
> 1eaabe34fc6f486367a176207420378f587d3b48, tagged v2.16.0-rc0).

This issue is a bug, but has nothing do do with bisect per-se, but is a
bug in diff-tree, compare these two:

    git -c color.ui=never diff-tree --pretty --stat HEAD
    git -c color.ui=never show --pretty --stat HEAD

diff-tree will incorrectly show colored output here despite
ui.color=never.


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