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?
> + 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?
> + 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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