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run-command: support custom fd-set in async

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This patch adds the possibility to supply a set of non-0 file
descriptors for async process communication instead of the
default-created pipe.

Additionally, we now support bi-directional communiction with the
async procedure, by giving the async function both read and write
file descriptors.

To retain compatiblity and similar "API feel" with start_command,
we require start_async callers to set .out = -1 to get a readable
file descriptor.  If either of .in or .out is 0, we supply no file
descriptor to the async process.

[sp: Note: Erik started this patch, and a huge bulk of it is
     his work.  All bugs were introduced later by Shawn.]

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Erik Faye-Lund
2010-02-05 12:57:38 -08:00
committed by Junio C Hamano
parent 4f41b61148
commit ae6a5609c0
7 changed files with 131 additions and 37 deletions
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7
upload-pack.c
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@ -105,12 +105,12 @@ static void show_edge(struct commit *commit)
fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1));
}
static int do_rev_list(int fd, void *create_full_pack)
static int do_rev_list(int in, int out, void *create_full_pack)
{
int i;
struct rev_info revs;
pack_pipe = xfdopen(fd, "w");
pack_pipe = xfdopen(out, "w");
init_revisions(&revs, NULL);
revs.tag_objects = 1;
revs.tree_objects = 1;
@ -162,8 +162,9 @@ static void create_pack_file(void)
int arg = 0;
if (shallow_nr) {
memset(&rev_list, 0, sizeof(rev_list));
rev_list.proc = do_rev_list;
rev_list.data = 0;
rev_list.out = -1;
if (start_async(&rev_list))
die("git upload-pack: unable to fork git-rev-list");
argv[arg++] = "pack-objects";