mirror of
https://github.com/git/git.git
synced 2024-11-24 18:33:43 +08:00
db27ee6392
The revised code accidentally inherited the restriction that a reference can be pushed only once, only because the original did not allow renaming. This is no longer necessary so lift it. Signed-off-by: Junio C Hamano <junkio@cox.net>
390 lines
8.2 KiB
C
390 lines
8.2 KiB
C
#include "cache.h"
|
|
#include "pkt-line.h"
|
|
#include "quote.h"
|
|
#include <sys/wait.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
|
|
/*
|
|
* Read all the refs from the other end
|
|
*/
|
|
struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match)
|
|
{
|
|
*list = NULL;
|
|
for (;;) {
|
|
struct ref *ref;
|
|
unsigned char old_sha1[20];
|
|
static char buffer[1000];
|
|
char *name;
|
|
int len;
|
|
|
|
len = packet_read_line(in, buffer, sizeof(buffer));
|
|
if (!len)
|
|
break;
|
|
if (buffer[len-1] == '\n')
|
|
buffer[--len] = 0;
|
|
|
|
if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
|
|
die("protocol error: expected sha/ref, got '%s'", buffer);
|
|
name = buffer + 41;
|
|
if (nr_match && !path_match(name, nr_match, match))
|
|
continue;
|
|
ref = xcalloc(1, sizeof(*ref) + len - 40);
|
|
memcpy(ref->old_sha1, old_sha1, 20);
|
|
memcpy(ref->name, buffer + 41, len - 40);
|
|
*list = ref;
|
|
list = &ref->next;
|
|
}
|
|
return list;
|
|
}
|
|
|
|
int get_ack(int fd, unsigned char *result_sha1)
|
|
{
|
|
static char line[1000];
|
|
int len = packet_read_line(fd, line, sizeof(line));
|
|
|
|
if (!len)
|
|
die("git-fetch-pack: expected ACK/NAK, got EOF");
|
|
if (line[len-1] == '\n')
|
|
line[--len] = 0;
|
|
if (!strcmp(line, "NAK"))
|
|
return 0;
|
|
if (!strncmp(line, "ACK ", 3)) {
|
|
if (!get_sha1_hex(line+4, result_sha1))
|
|
return 1;
|
|
}
|
|
die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
|
|
}
|
|
|
|
int path_match(const char *path, int nr, char **match)
|
|
{
|
|
int i;
|
|
int pathlen = strlen(path);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
char *s = match[i];
|
|
int len = strlen(s);
|
|
|
|
if (!len || len > pathlen)
|
|
continue;
|
|
if (memcmp(path + pathlen - len, s, len))
|
|
continue;
|
|
if (pathlen > len && path[pathlen - len - 1] != '/')
|
|
continue;
|
|
*s = 0;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct refspec {
|
|
char *src;
|
|
char *dst;
|
|
};
|
|
|
|
static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
|
|
{
|
|
int i;
|
|
struct refspec *rs = xmalloc(sizeof(*rs) * (nr_refspec + 1));
|
|
for (i = 0; i < nr_refspec; i++) {
|
|
char *sp, *dp, *ep;
|
|
sp = refspec[i];
|
|
ep = strchr(sp, ':');
|
|
if (ep) {
|
|
dp = ep + 1;
|
|
*ep = 0;
|
|
}
|
|
else
|
|
dp = sp;
|
|
rs[i].src = sp;
|
|
rs[i].dst = dp;
|
|
}
|
|
rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
|
|
return rs;
|
|
}
|
|
|
|
static int count_refspec_match(const char *pattern,
|
|
struct ref *refs,
|
|
struct ref **matched_ref)
|
|
{
|
|
int match;
|
|
int patlen = strlen(pattern);
|
|
|
|
for (match = 0; refs; refs = refs->next) {
|
|
char *name = refs->name;
|
|
int namelen = strlen(name);
|
|
if (namelen < patlen ||
|
|
memcmp(name + namelen - patlen, pattern, patlen))
|
|
continue;
|
|
if (namelen != patlen && name[namelen - patlen - 1] != '/')
|
|
continue;
|
|
match++;
|
|
*matched_ref = refs;
|
|
}
|
|
return match;
|
|
}
|
|
|
|
static void link_dst_tail(struct ref *ref, struct ref ***tail)
|
|
{
|
|
**tail = ref;
|
|
*tail = &ref->next;
|
|
**tail = NULL;
|
|
}
|
|
|
|
static int match_explicit_refs(struct ref *src, struct ref *dst,
|
|
struct ref ***dst_tail, struct refspec *rs)
|
|
{
|
|
int i, errs;
|
|
for (i = errs = 0; rs[i].src; i++) {
|
|
struct ref *matched_src, *matched_dst;
|
|
|
|
matched_src = matched_dst = NULL;
|
|
switch (count_refspec_match(rs[i].src, src, &matched_src)) {
|
|
case 1:
|
|
break;
|
|
case 0:
|
|
errs = 1;
|
|
error("src refspec %s does not match any.");
|
|
break;
|
|
default:
|
|
errs = 1;
|
|
error("src refspec %s matches more than one.",
|
|
rs[i].src);
|
|
break;
|
|
}
|
|
switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
|
|
case 1:
|
|
break;
|
|
case 0:
|
|
if (!memcmp(rs[i].dst, "refs/", 5)) {
|
|
int len = strlen(rs[i].dst) + 1;
|
|
matched_dst = xcalloc(1, sizeof(*dst) + len);
|
|
memcpy(matched_dst->name, rs[i].dst, len);
|
|
link_dst_tail(matched_dst, dst_tail);
|
|
}
|
|
else if (!strcmp(rs[i].src, rs[i].dst) &&
|
|
matched_src) {
|
|
/* pushing "master:master" when
|
|
* remote does not have master yet.
|
|
*/
|
|
int len = strlen(matched_src->name) + 1;
|
|
matched_dst = xcalloc(1, sizeof(*dst) + len);
|
|
memcpy(matched_dst->name, matched_src->name,
|
|
len);
|
|
link_dst_tail(matched_dst, dst_tail);
|
|
}
|
|
else {
|
|
errs = 1;
|
|
error("dst refspec %s does not match any "
|
|
"existing ref on the remote and does "
|
|
"not start with refs/.", rs[i].dst);
|
|
}
|
|
break;
|
|
default:
|
|
errs = 1;
|
|
error("dst refspec %s matches more than one.",
|
|
rs[i].dst);
|
|
break;
|
|
}
|
|
if (errs)
|
|
continue;
|
|
if (matched_dst->peer_ref) {
|
|
errs = 1;
|
|
error("dst ref %s receives from more than one src.",
|
|
matched_dst->name);
|
|
}
|
|
else
|
|
matched_dst->peer_ref = matched_src;
|
|
}
|
|
return -errs;
|
|
}
|
|
|
|
static struct ref *find_ref_by_name(struct ref *list, const char *name)
|
|
{
|
|
for ( ; list; list = list->next)
|
|
if (!strcmp(list->name, name))
|
|
return list;
|
|
return NULL;
|
|
}
|
|
|
|
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
|
|
int nr_refspec, char **refspec, int all)
|
|
{
|
|
struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
|
|
|
|
if (nr_refspec)
|
|
return match_explicit_refs(src, dst, dst_tail, rs);
|
|
|
|
/* pick the remainder */
|
|
for ( ; src; src = src->next) {
|
|
struct ref *dst_peer;
|
|
if (src->peer_ref)
|
|
continue;
|
|
dst_peer = find_ref_by_name(dst, src->name);
|
|
if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
|
|
continue;
|
|
if (!dst_peer) {
|
|
/* Create a new one and link it */
|
|
int len = strlen(src->name) + 1;
|
|
dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
|
|
memcpy(dst_peer->name, src->name, len);
|
|
memcpy(dst_peer->new_sha1, src->new_sha1, 20);
|
|
link_dst_tail(dst_peer, dst_tail);
|
|
}
|
|
dst_peer->peer_ref = src;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum protocol {
|
|
PROTO_LOCAL = 1,
|
|
PROTO_SSH,
|
|
PROTO_GIT,
|
|
};
|
|
|
|
static enum protocol get_protocol(const char *name)
|
|
{
|
|
if (!strcmp(name, "ssh"))
|
|
return PROTO_SSH;
|
|
if (!strcmp(name, "git"))
|
|
return PROTO_GIT;
|
|
die("I don't handle protocol '%s'", name);
|
|
}
|
|
|
|
#define STR_(s) # s
|
|
#define STR(s) STR_(s)
|
|
|
|
static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
|
|
{
|
|
int sockfd = -1;
|
|
char *colon, *end;
|
|
char *port = STR(DEFAULT_GIT_PORT);
|
|
struct addrinfo hints, *ai0, *ai;
|
|
int gai;
|
|
|
|
if (host[0] == '[') {
|
|
end = strchr(host + 1, ']');
|
|
if (end) {
|
|
*end = 0;
|
|
end++;
|
|
host++;
|
|
} else
|
|
end = host;
|
|
} else
|
|
end = host;
|
|
colon = strchr(end, ':');
|
|
|
|
if (colon) {
|
|
*colon = 0;
|
|
port = colon + 1;
|
|
}
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
|
|
gai = getaddrinfo(host, port, &hints, &ai);
|
|
if (gai)
|
|
die("Unable to look up %s (%s)", host, gai_strerror(gai));
|
|
|
|
for (ai0 = ai; ai; ai = ai->ai_next) {
|
|
sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
|
|
if (sockfd < 0)
|
|
continue;
|
|
if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
|
|
close(sockfd);
|
|
sockfd = -1;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
freeaddrinfo(ai0);
|
|
|
|
if (sockfd < 0)
|
|
die("unable to connect a socket (%s)", strerror(errno));
|
|
|
|
fd[0] = sockfd;
|
|
fd[1] = sockfd;
|
|
packet_write(sockfd, "%s %s\n", prog, path);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Yeah, yeah, fixme. Need to pass in the heads etc.
|
|
*/
|
|
int git_connect(int fd[2], char *url, const char *prog)
|
|
{
|
|
char command[1024];
|
|
char *host, *path;
|
|
char *colon;
|
|
int pipefd[2][2];
|
|
pid_t pid;
|
|
enum protocol protocol;
|
|
|
|
host = NULL;
|
|
path = url;
|
|
colon = strchr(url, ':');
|
|
protocol = PROTO_LOCAL;
|
|
if (colon) {
|
|
*colon = 0;
|
|
host = url;
|
|
path = colon+1;
|
|
protocol = PROTO_SSH;
|
|
if (!memcmp(path, "//", 2)) {
|
|
char *slash = strchr(path + 2, '/');
|
|
if (slash) {
|
|
int nr = slash - path - 2;
|
|
memmove(path, path+2, nr);
|
|
path[nr] = 0;
|
|
protocol = get_protocol(url);
|
|
host = path;
|
|
path = slash;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (protocol == PROTO_GIT)
|
|
return git_tcp_connect(fd, prog, host, path);
|
|
|
|
if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
|
|
die("unable to create pipe pair for communication");
|
|
pid = fork();
|
|
if (!pid) {
|
|
snprintf(command, sizeof(command), "%s %s", prog,
|
|
sq_quote(path));
|
|
dup2(pipefd[1][0], 0);
|
|
dup2(pipefd[0][1], 1);
|
|
close(pipefd[0][0]);
|
|
close(pipefd[0][1]);
|
|
close(pipefd[1][0]);
|
|
close(pipefd[1][1]);
|
|
if (protocol == PROTO_SSH)
|
|
execlp("ssh", "ssh", host, command, NULL);
|
|
else
|
|
execlp("sh", "sh", "-c", command, NULL);
|
|
die("exec failed");
|
|
}
|
|
fd[0] = pipefd[0][0];
|
|
fd[1] = pipefd[1][1];
|
|
close(pipefd[0][1]);
|
|
close(pipefd[1][0]);
|
|
return pid;
|
|
}
|
|
|
|
int finish_connect(pid_t pid)
|
|
{
|
|
int ret;
|
|
|
|
for (;;) {
|
|
ret = waitpid(pid, NULL, 0);
|
|
if (!ret)
|
|
break;
|
|
if (errno != EINTR)
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|