do not run pager with diff --no-index --quiet

There is no point in running a pager when --quiet is given,
since we are producing no output. The regular diff code path
handles this already, because --quiet implies --exit-code,
and we check for --exit-code when deciding not to run the
pager.

However, the "quiet implies exit-code" logic is done in
diff_setup_done, and the no-index code path sets up its
pager before running diff_setup_done, and misses this case.

We can fix this by reordering our initialization.
Currently we do:

1. read command line arguments into diff_options

2. Set pager if EXIT_CODE not requested

3. always set EXIT_CODE, since we are emulating
traditional diff

4. call diff_setup_done

We can fix the problem by moving pager initialization (step
2) after step 4. But step 3 must come after step 2 (since we
want to know whether the _user_ requested --exit-code, not
whether we turned it on unconditionally). So we must move
both.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff-no-index.c b/diff-no-index.c
index fc1decdf38a7649f37f410947d343436061aa8a0..77667b810d383d18a3b912b739ba97d430b30133 100644 (file)
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -224,8 +224,6 @@ void diff_no_index(struct rev_info *revs,
                }
        }
 
-       setup_diff_pager(&revs->diffopt);
-
        if (prefix) {
                int len = strlen(prefix);
                const char *paths[3];
@@ -250,13 +248,15 @@ void diff_no_index(struct rev_info *revs,
        if (!revs->diffopt.output_format)
                revs->diffopt.output_format = DIFF_FORMAT_PATCH;
 
-       DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS);
        DIFF_OPT_SET(&revs->diffopt, NO_INDEX);
 
        revs->max_count = -2;
        if (diff_setup_done(&revs->diffopt) < 0)
                die("diff_setup_done failed");
 
+       setup_diff_pager(&revs->diffopt);
+       DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS);
+
        if (queue_diff(&revs->diffopt, revs->diffopt.pathspec.raw[0],
                       revs->diffopt.pathspec.raw[1]))
                exit(1);