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Add diff-option --ext-diff

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To prevent funky games with external diff engines, git-log and
friends prevent external diff engines from being called. That makes
sense in the context of git-format-patch or git-rebase.

However, for "git log -p" it is not so nice to get the message
that binary files cannot be compared, while "git diff" has no
problems with them, if you provided an external diff driver.

With this patch, "git log --ext-diff -p" will do what you expect,
and the option "--no-ext-diff" can be used to override that
setting.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2007-06-30 18:47:07 +01:00 committed by Junio C Hamano
parent c401b33c34
commit 72909befaa
2 changed files with 12 additions and 0 deletions
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8
Documentation/diff-options.txt
View File

@ -168,5 +168,13 @@
--quiet::
Disable all output of the program. Implies --exit-code.
--ext-diff::
Allow an external diff helper to be executed. If you set an
external diff driver with gitlink:gitattributes(5), you need
to use this option with gitlink:git-log(1) and friends.
--no-ext-diff::
Disallow external diff drivers.
For more detailed explanation on these common options, see also
link:diffcore.html[diffcore documentation].

4
diff.c
View File

@ -2241,6 +2241,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
options->exit_with_status = 1;
else if (!strcmp(arg, "--quiet"))
options->quiet = 1;
else if (!strcmp(arg, "--ext-diff"))
options->allow_external = 1;
else if (!strcmp(arg, "--no-ext-diff"))
options->allow_external = 0;
else
return 0;
return 1;