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git-send-pack: actually send the object pack

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This concludes this lesson.  I've actually successfully sent an update
using the git-send-pack command.

Probably tons of work still to do, and nasty debugging, but it's now
actually potentially useful.
This commit is contained in:
Linus Torvalds 2005-06-30 10:17:39 -07:00
parent 2eca23daf5
commit 94fdb7aa17
1 changed files with 79 additions and 12 deletions
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91
send-pack.c
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@ -13,7 +13,82 @@ struct ref {
char name[0];
};
static struct ref *ref_list = NULL, **last_ref = &ref_list;
static void exec_pack_objects(void)
{
static char *args[] = {
"git-pack-objects",
"--stdout",
NULL
};
execvp("git-pack-objects", args);
die("git-pack-objects exec failed (%s)", strerror(errno));
}
static void exec_rev_list(struct ref *refs)
{
static char *args[1000];
int i = 0;
args[i++] = "git-rev-list"; /* 0 */
args[i++] = "--objects"; /* 1 */
while (refs) {
char *buf = malloc(100);
if (i > 900)
die("git-rev-list environment overflow");
args[i++] = buf;
snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
buf += 50;
args[i++] = buf;
snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
refs = refs->next;
}
args[i] = NULL;
execvp("git-rev-list", args);
die("git-rev-list exec failed (%s)", strerror(errno));
}
static void rev_list(int fd, struct ref *refs)
{
int pipe_fd[2];
pid_t pack_objects_pid;
if (pipe(pipe_fd) < 0)
die("rev-list setup: pipe failed");
pack_objects_pid = fork();
if (!pack_objects_pid) {
dup2(pipe_fd[0], 0);
dup2(fd, 1);
close(pipe_fd[0]);
close(pipe_fd[1]);
close(fd);
exec_pack_objects();
die("pack-objects setup failed");
}
if (pack_objects_pid < 0)
die("pack-objects fork failed");
dup2(pipe_fd[1], 1);
close(pipe_fd[0]);
close(pipe_fd[1]);
close(fd);
exec_rev_list(refs);
}
static int pack_objects(int fd, struct ref *refs)
{
pid_t rev_list_pid;
rev_list_pid = fork();
if (!rev_list_pid) {
rev_list(fd, refs);
die("rev-list setup failed");
}
if (rev_list_pid < 0)
die("rev-list fork failed");
/*
* We don't wait for the rev-list pipeline in the parent:
* we end up waiting for the other end instead
*/
}
static int read_ref(const char *ref, unsigned char *sha1)
{
@ -35,6 +110,7 @@ static int read_ref(const char *ref, unsigned char *sha1)
static int send_pack(int in, int out)
{
struct ref *ref_list = NULL, **last_ref = &ref_list;
struct ref *ref;
for (;;) {
@ -79,17 +155,8 @@ static int send_pack(int in, int out)
}
packet_flush(out);
/*
* FIXME! Here we need to now send the pack-file to the "out" fd, using something
* like this:
*
* fork() +
* dup2(out, 1) +
* execve("/bin/sh git-rev-list --objects ..for-each-ref-list.. | "
* "git-pack-objects --stdout");
*
* but I'm too tired right now.
*/
if (ref_list)
pack_objects(out, ref_list);
close(out);
return 0;
}