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fix pager.diff with diff --no-index

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git-diff does not rely on the git wrapper to setup its
pager; instead, it sets it up on its own after seeing
whether --quiet or --exit-code has been specified.  After
diff_no_index was split off from cmd_diff, commit b3fde6c
(git diff --no-index: default to page like other diff
frontends, 2008-05-26) duplicated the one-liner from
cmd_diff to turn on the pager.

Later, commit 8f0359f (Allow pager of diff command be
enabled/disabled, 2008-07-21) taught the the version in
cmd_diff to respect the pager.diff config, but the version
in diff_no_index was left behind. This meant that

  git -c pager.diff=0 diff a b

would not use a pager, but

  git -c pager.diff=0 diff --no-index a b

would.  Let's fix it by factoring out a common function.

While we're there, let's update the antiquated comment,
which claims that the pager interferes with propagating the
exit code; this has not been the case since ea27a18 (spawn
pager via run_command interface, 2008-07-22).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2012-06-15 16:29:48 -04:00 committed by Junio C Hamano
parent 121f71f0da
commit 1af3d97751
3 changed files with 20 additions and 13 deletions
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2
builtin.h
View File

@ -41,6 +41,8 @@ int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c);
extern int check_pager_config(const char *cmd);
struct diff_options;
extern void setup_diff_pager(struct diff_options *);
extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, char **buf, unsigned long *buf_size);

24
builtin/diff.c
View File

@ -304,13 +304,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
/*
* If the user asked for our exit code then don't start a
* pager or we would end up reporting its exit code instead.
*/
if (!DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS) &&
check_pager_config("diff") != 0)
setup_pager();
setup_diff_pager(&rev.diffopt);
/*
* Do we have --cached and not have a pending object, then
@ -421,3 +415,19 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
refresh_index_quietly();
return result;
}
void setup_diff_pager(struct diff_options *opt)
{
/*
* If the user asked for our exit code, then either they want --quiet
* or --exit-code. We should definitely not bother with a pager in the
* former case, as we will generate no output. Since we still properly
* report our exit code even when a pager is run, we _could_ run a
* pager with --exit-code. But since we have not done so historically,
* and because it is easy to find people oneline advising "git diff
* --exit-code" in hooks and other scripts, we do not do so.
*/
if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
check_pager_config("diff") != 0)
setup_pager();
}

7
diff-no-index.c
View File

@ -224,12 +224,7 @@ void diff_no_index(struct rev_info *revs,
}
}
/*
* If the user asked for our exit code then don't start a
* pager or we would end up reporting its exit code instead.
*/
if (!DIFF_OPT_TST(&revs->diffopt, EXIT_WITH_STATUS))
setup_pager();
setup_diff_pager(&revs->diffopt);
if (prefix) {
int len = strlen(prefix);