linux-kernel - Re: [PATCH] fread does not return negative on error

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Date:	Wed, 24 Jun 2009 09:15:20 -0700
From:	Junio C Hamano <gitster@...ox.com>
To:	Johannes Schindelin <Johannes.Schindelin@....de>
Cc:	Ingo Molnar <mingo@...e.hu>,
	René Scharfe <rene.scharfe@...fire.ath.cx>,
	roel kluin <roel.kluin@...il.com>, git@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] fread does not return negative on error

Johannes Schindelin <Johannes.Schindelin@....de> writes:

> This here script:
>
> -- snip --
> for file in abspath.c alias.c cache.h color.c color.h config.c ctype.c \
> 	environment.c exec_cmd.c exec_cmd.h help.c help.h levenshtein.c \
> 	levenshtein.h pager.c parse-options.c parse-options.h path.c \
> 	quote.c quote.h run-command.c run-command.h sigchain.c sigchain.h \
> 	strbuf.c strbuf.h string.c string.h symbol.c symbol.h usage.c \
> 	util.h wrapper.c
> do
> 	echo $file
> 	git shortlog -n -s $file | head -n 2
> done

I have thought about suggesting this myself, and your output for many of
the files matched my intuition, but some were grossly off, so I checked.

The above procedure counts commits, and a one liner "s/char \*/const &/"
weighs as heavily as the patch that implemented the whole thing, for a
file that was done in one commit almost perfectly except that it needed a
small constness fix.  Summarizing output from "blame" for each file may
give you a more meaningful results:

    # timestamp
    ts='[12][0-9][0-9][0-9]-[0-9][0-9]-[0-3][0-9] ..:..:.. [-+]....'
    # linenum
    lno='[1-9][0-9]*'
    git blame "$file" |
    sed -e 's/^[^ ]*  *(\([^)]*[^ ]\)  *'"$ts  *$lno"').*/\1/' |
    sort |
    uniq -c |
    sort -r -n

For example, I do not think it is fair to credit me for abspath.c more
than Dmitry like this:

> outputs this (note that a few files you mentioned are not in git.git):
>
> abspath.c
>      2	Junio C Hamano
>      1	Dmitry Potapov

Initially Dmitry introduced this file with 5b8e6f8 (shrink git-shell by
avoiding redundant dependencies, 2008-06-28) at 68 lines.  J6t added 36
lines for add_path() with 10c4c88 (Allow add_path() to add non-existent
directories to the path, 2008-07-21), I added 12 lines to add a new
function with 90b4a71 (is_directory(): a generic helper function,
2008-09-09) and then added a two-liner out-of-bounds-then-die check in
737e31a (make_absolute_path(): check bounds when seeing an overlong
symlink, 2008-12-17).
--
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