* Junio C Hamano (gitster@xxxxxxxxx) [100216 00:42]:
> Larry D'Anna <larry@xxxxxxxxxxxxxx> writes:
>
> > Rationale: diff_flush_patch expects to write its output to options->file.
> > Adding a "silence" flag to diff_flush_patch and everything it calls would be
> > more invasive.
>
> I would agree that the logic to redirect the output to nowhere may be the
> easiest way out, but because the reason anybody sane would want to give -q
> is to say "I don't care what the actual changes are, but I want to know if
> there is any real quick" (otherwise the call would be "diff -w >/dev/null"),
> shouldn't we at least be exiting the loop early when we see any difference?
>
> > Signed-off-by: Larry D'Anna <larry@xxxxxxxxxxxxxx>
> > ---
> > diff.c | 20 ++++++++++++++++++++
> > 1 files changed, 20 insertions(+), 0 deletions(-)
> >
> > diff --git a/diff.c b/diff.c
> > index 68def6c..ff00816 100644
> > --- a/diff.c
> > +++ b/diff.c
> > @@ -3522,6 +3522,26 @@ void diff_flush(struct diff_options *options)
> > separator++;
> > }
> >
> > + if (output_format & DIFF_FORMAT_NO_OUTPUT &&
> > + DIFF_OPT_TST(options, EXIT_WITH_STATUS) &&
> > + DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) {
> > + /* run diff_flush_patch for the exit status */
> > + /* setting options->file to /dev/null should be safe, becaue we
> > + aren't supposed to produce any output anyways */
>
> Style?
>
> > + static FILE *devnull = NULL;
>
> Would this cause one file descriptor to leak? Do we care?
Originally I thought it would be best to just let one leak, because I didn't
know how much longer it would need to stick around. I didn't notice it's being
closed anyway a few lines down.
> > + if(!devnull) {
>
> Style? if (!devnull)
>
> > + devnull = fopen("/dev/null", "w");
> > + if (!devnull)
> > + die_errno("Could not open /dev/null");
> > + }
> > + options->file = devnull;
>
> Would this cause the original "options->file" leak? Do we care?
oops.
> > + for (i = 0; i < q->nr; i++) {
> > + struct diff_filepair *p = q->queue[i];
> > + if (check_pair_status(p))
> > + diff_flush_patch(p, options);
> > + }
> > + }
> > +
> > if (output_format & DIFF_FORMAT_PATCH) {
> > if (separator) {
> > putc(options->line_termination, options->file);
> > --
> > 1.7.0.rc2.40.g7d8aa
>
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