ef90d6d420
git_config() only had a function parameter, but no callback data parameter. This assumes that all callback functions only modify global variables. With this patch, every callback gets a void * parameter, and it is hoped that this will help the libification effort. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
520 lines
12 KiB
C
520 lines
12 KiB
C
#include "cache.h"
|
|
#include "pack.h"
|
|
#include "refs.h"
|
|
#include "pkt-line.h"
|
|
#include "run-command.h"
|
|
#include "exec_cmd.h"
|
|
#include "commit.h"
|
|
#include "object.h"
|
|
|
|
static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
|
|
|
|
static int deny_non_fast_forwards = 0;
|
|
static int receive_fsck_objects;
|
|
static int receive_unpack_limit = -1;
|
|
static int transfer_unpack_limit = -1;
|
|
static int unpack_limit = 100;
|
|
static int report_status;
|
|
|
|
static char capabilities[] = " report-status delete-refs ";
|
|
static int capabilities_sent;
|
|
|
|
static int receive_pack_config(const char *var, const char *value, void *cb)
|
|
{
|
|
if (strcmp(var, "receive.denynonfastforwards") == 0) {
|
|
deny_non_fast_forwards = git_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
|
|
if (strcmp(var, "receive.unpacklimit") == 0) {
|
|
receive_unpack_limit = git_config_int(var, value);
|
|
return 0;
|
|
}
|
|
|
|
if (strcmp(var, "transfer.unpacklimit") == 0) {
|
|
transfer_unpack_limit = git_config_int(var, value);
|
|
return 0;
|
|
}
|
|
|
|
if (strcmp(var, "receive.fsckobjects") == 0) {
|
|
receive_fsck_objects = git_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
|
|
return git_default_config(var, value, cb);
|
|
}
|
|
|
|
static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
|
|
{
|
|
if (capabilities_sent)
|
|
packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
|
|
else
|
|
packet_write(1, "%s %s%c%s\n",
|
|
sha1_to_hex(sha1), path, 0, capabilities);
|
|
capabilities_sent = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void write_head_info(void)
|
|
{
|
|
for_each_ref(show_ref, NULL);
|
|
if (!capabilities_sent)
|
|
show_ref("capabilities^{}", null_sha1, 0, NULL);
|
|
|
|
}
|
|
|
|
struct command {
|
|
struct command *next;
|
|
const char *error_string;
|
|
unsigned char old_sha1[20];
|
|
unsigned char new_sha1[20];
|
|
char ref_name[FLEX_ARRAY]; /* more */
|
|
};
|
|
|
|
static struct command *commands;
|
|
|
|
static const char pre_receive_hook[] = "hooks/pre-receive";
|
|
static const char post_receive_hook[] = "hooks/post-receive";
|
|
|
|
static int hook_status(int code, const char *hook_name)
|
|
{
|
|
switch (code) {
|
|
case 0:
|
|
return 0;
|
|
case -ERR_RUN_COMMAND_FORK:
|
|
return error("hook fork failed");
|
|
case -ERR_RUN_COMMAND_EXEC:
|
|
return error("hook execute failed");
|
|
case -ERR_RUN_COMMAND_PIPE:
|
|
return error("hook pipe failed");
|
|
case -ERR_RUN_COMMAND_WAITPID:
|
|
return error("waitpid failed");
|
|
case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
|
|
return error("waitpid is confused");
|
|
case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
|
|
return error("%s died of signal", hook_name);
|
|
case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
|
|
return error("%s died strangely", hook_name);
|
|
default:
|
|
error("%s exited with error code %d", hook_name, -code);
|
|
return -code;
|
|
}
|
|
}
|
|
|
|
static int run_hook(const char *hook_name)
|
|
{
|
|
static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
|
|
struct command *cmd;
|
|
struct child_process proc;
|
|
const char *argv[2];
|
|
int have_input = 0, code;
|
|
|
|
for (cmd = commands; !have_input && cmd; cmd = cmd->next) {
|
|
if (!cmd->error_string)
|
|
have_input = 1;
|
|
}
|
|
|
|
if (!have_input || access(hook_name, X_OK) < 0)
|
|
return 0;
|
|
|
|
argv[0] = hook_name;
|
|
argv[1] = NULL;
|
|
|
|
memset(&proc, 0, sizeof(proc));
|
|
proc.argv = argv;
|
|
proc.in = -1;
|
|
proc.stdout_to_stderr = 1;
|
|
|
|
code = start_command(&proc);
|
|
if (code)
|
|
return hook_status(code, hook_name);
|
|
for (cmd = commands; cmd; cmd = cmd->next) {
|
|
if (!cmd->error_string) {
|
|
size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n",
|
|
sha1_to_hex(cmd->old_sha1),
|
|
sha1_to_hex(cmd->new_sha1),
|
|
cmd->ref_name);
|
|
if (write_in_full(proc.in, buf, n) != n)
|
|
break;
|
|
}
|
|
}
|
|
close(proc.in);
|
|
return hook_status(finish_command(&proc), hook_name);
|
|
}
|
|
|
|
static int run_update_hook(struct command *cmd)
|
|
{
|
|
static const char update_hook[] = "hooks/update";
|
|
struct child_process proc;
|
|
const char *argv[5];
|
|
|
|
if (access(update_hook, X_OK) < 0)
|
|
return 0;
|
|
|
|
argv[0] = update_hook;
|
|
argv[1] = cmd->ref_name;
|
|
argv[2] = sha1_to_hex(cmd->old_sha1);
|
|
argv[3] = sha1_to_hex(cmd->new_sha1);
|
|
argv[4] = NULL;
|
|
|
|
memset(&proc, 0, sizeof(proc));
|
|
proc.argv = argv;
|
|
proc.no_stdin = 1;
|
|
proc.stdout_to_stderr = 1;
|
|
|
|
return hook_status(run_command(&proc), update_hook);
|
|
}
|
|
|
|
static const char *update(struct command *cmd)
|
|
{
|
|
const char *name = cmd->ref_name;
|
|
unsigned char *old_sha1 = cmd->old_sha1;
|
|
unsigned char *new_sha1 = cmd->new_sha1;
|
|
struct ref_lock *lock;
|
|
|
|
/* only refs/... are allowed */
|
|
if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) {
|
|
error("refusing to create funny ref '%s' remotely", name);
|
|
return "funny refname";
|
|
}
|
|
|
|
if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
|
|
error("unpack should have generated %s, "
|
|
"but I can't find it!", sha1_to_hex(new_sha1));
|
|
return "bad pack";
|
|
}
|
|
if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
|
|
!is_null_sha1(old_sha1) &&
|
|
!prefixcmp(name, "refs/heads/")) {
|
|
struct object *old_object, *new_object;
|
|
struct commit *old_commit, *new_commit;
|
|
struct commit_list *bases, *ent;
|
|
|
|
old_object = parse_object(old_sha1);
|
|
new_object = parse_object(new_sha1);
|
|
|
|
if (!old_object || !new_object ||
|
|
old_object->type != OBJ_COMMIT ||
|
|
new_object->type != OBJ_COMMIT) {
|
|
error("bad sha1 objects for %s", name);
|
|
return "bad ref";
|
|
}
|
|
old_commit = (struct commit *)old_object;
|
|
new_commit = (struct commit *)new_object;
|
|
bases = get_merge_bases(old_commit, new_commit, 1);
|
|
for (ent = bases; ent; ent = ent->next)
|
|
if (!hashcmp(old_sha1, ent->item->object.sha1))
|
|
break;
|
|
free_commit_list(bases);
|
|
if (!ent) {
|
|
error("denying non-fast forward %s"
|
|
" (you should pull first)", name);
|
|
return "non-fast forward";
|
|
}
|
|
}
|
|
if (run_update_hook(cmd)) {
|
|
error("hook declined to update %s", name);
|
|
return "hook declined";
|
|
}
|
|
|
|
if (is_null_sha1(new_sha1)) {
|
|
if (!parse_object(old_sha1)) {
|
|
warning ("Allowing deletion of corrupt ref.");
|
|
old_sha1 = NULL;
|
|
}
|
|
if (delete_ref(name, old_sha1)) {
|
|
error("failed to delete %s", name);
|
|
return "failed to delete";
|
|
}
|
|
return NULL; /* good */
|
|
}
|
|
else {
|
|
lock = lock_any_ref_for_update(name, old_sha1, 0);
|
|
if (!lock) {
|
|
error("failed to lock %s", name);
|
|
return "failed to lock";
|
|
}
|
|
if (write_ref_sha1(lock, new_sha1, "push")) {
|
|
return "failed to write"; /* error() already called */
|
|
}
|
|
return NULL; /* good */
|
|
}
|
|
}
|
|
|
|
static char update_post_hook[] = "hooks/post-update";
|
|
|
|
static void run_update_post_hook(struct command *cmd)
|
|
{
|
|
struct command *cmd_p;
|
|
int argc;
|
|
const char **argv;
|
|
|
|
for (argc = 0, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
|
|
if (cmd_p->error_string)
|
|
continue;
|
|
argc++;
|
|
}
|
|
if (!argc || access(update_post_hook, X_OK) < 0)
|
|
return;
|
|
argv = xmalloc(sizeof(*argv) * (2 + argc));
|
|
argv[0] = update_post_hook;
|
|
|
|
for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
|
|
char *p;
|
|
if (cmd_p->error_string)
|
|
continue;
|
|
p = xmalloc(strlen(cmd_p->ref_name) + 1);
|
|
strcpy(p, cmd_p->ref_name);
|
|
argv[argc] = p;
|
|
argc++;
|
|
}
|
|
argv[argc] = NULL;
|
|
run_command_v_opt(argv, RUN_COMMAND_NO_STDIN
|
|
| RUN_COMMAND_STDOUT_TO_STDERR);
|
|
}
|
|
|
|
static void execute_commands(const char *unpacker_error)
|
|
{
|
|
struct command *cmd = commands;
|
|
|
|
if (unpacker_error) {
|
|
while (cmd) {
|
|
cmd->error_string = "n/a (unpacker error)";
|
|
cmd = cmd->next;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (run_hook(pre_receive_hook)) {
|
|
while (cmd) {
|
|
cmd->error_string = "pre-receive hook declined";
|
|
cmd = cmd->next;
|
|
}
|
|
return;
|
|
}
|
|
|
|
while (cmd) {
|
|
cmd->error_string = update(cmd);
|
|
cmd = cmd->next;
|
|
}
|
|
}
|
|
|
|
static void read_head_info(void)
|
|
{
|
|
struct command **p = &commands;
|
|
for (;;) {
|
|
static char line[1000];
|
|
unsigned char old_sha1[20], new_sha1[20];
|
|
struct command *cmd;
|
|
char *refname;
|
|
int len, reflen;
|
|
|
|
len = packet_read_line(0, line, sizeof(line));
|
|
if (!len)
|
|
break;
|
|
if (line[len-1] == '\n')
|
|
line[--len] = 0;
|
|
if (len < 83 ||
|
|
line[40] != ' ' ||
|
|
line[81] != ' ' ||
|
|
get_sha1_hex(line, old_sha1) ||
|
|
get_sha1_hex(line + 41, new_sha1))
|
|
die("protocol error: expected old/new/ref, got '%s'",
|
|
line);
|
|
|
|
refname = line + 82;
|
|
reflen = strlen(refname);
|
|
if (reflen + 82 < len) {
|
|
if (strstr(refname + reflen + 1, "report-status"))
|
|
report_status = 1;
|
|
}
|
|
cmd = xmalloc(sizeof(struct command) + len - 80);
|
|
hashcpy(cmd->old_sha1, old_sha1);
|
|
hashcpy(cmd->new_sha1, new_sha1);
|
|
memcpy(cmd->ref_name, line + 82, len - 81);
|
|
cmd->error_string = NULL;
|
|
cmd->next = NULL;
|
|
*p = cmd;
|
|
p = &cmd->next;
|
|
}
|
|
}
|
|
|
|
static const char *parse_pack_header(struct pack_header *hdr)
|
|
{
|
|
switch (read_pack_header(0, hdr)) {
|
|
case PH_ERROR_EOF:
|
|
return "eof before pack header was fully read";
|
|
|
|
case PH_ERROR_PACK_SIGNATURE:
|
|
return "protocol error (pack signature mismatch detected)";
|
|
|
|
case PH_ERROR_PROTOCOL:
|
|
return "protocol error (pack version unsupported)";
|
|
|
|
default:
|
|
return "unknown error in parse_pack_header";
|
|
|
|
case 0:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static const char *pack_lockfile;
|
|
|
|
static const char *unpack(void)
|
|
{
|
|
struct pack_header hdr;
|
|
const char *hdr_err;
|
|
char hdr_arg[38];
|
|
|
|
hdr_err = parse_pack_header(&hdr);
|
|
if (hdr_err)
|
|
return hdr_err;
|
|
snprintf(hdr_arg, sizeof(hdr_arg), "--pack_header=%u,%u",
|
|
ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
|
|
|
|
if (ntohl(hdr.hdr_entries) < unpack_limit) {
|
|
int code, i = 0;
|
|
const char *unpacker[4];
|
|
unpacker[i++] = "unpack-objects";
|
|
if (receive_fsck_objects)
|
|
unpacker[i++] = "--strict";
|
|
unpacker[i++] = hdr_arg;
|
|
unpacker[i++] = NULL;
|
|
code = run_command_v_opt(unpacker, RUN_GIT_CMD);
|
|
switch (code) {
|
|
case 0:
|
|
return NULL;
|
|
case -ERR_RUN_COMMAND_FORK:
|
|
return "unpack fork failed";
|
|
case -ERR_RUN_COMMAND_EXEC:
|
|
return "unpack execute failed";
|
|
case -ERR_RUN_COMMAND_WAITPID:
|
|
return "waitpid failed";
|
|
case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
|
|
return "waitpid is confused";
|
|
case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
|
|
return "unpacker died of signal";
|
|
case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
|
|
return "unpacker died strangely";
|
|
default:
|
|
return "unpacker exited with error code";
|
|
}
|
|
} else {
|
|
const char *keeper[7];
|
|
int s, status, i = 0;
|
|
char keep_arg[256];
|
|
struct child_process ip;
|
|
|
|
s = sprintf(keep_arg, "--keep=receive-pack %i on ", getpid());
|
|
if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
|
|
strcpy(keep_arg + s, "localhost");
|
|
|
|
keeper[i++] = "index-pack";
|
|
keeper[i++] = "--stdin";
|
|
if (receive_fsck_objects)
|
|
keeper[i++] = "--strict";
|
|
keeper[i++] = "--fix-thin";
|
|
keeper[i++] = hdr_arg;
|
|
keeper[i++] = keep_arg;
|
|
keeper[i++] = NULL;
|
|
memset(&ip, 0, sizeof(ip));
|
|
ip.argv = keeper;
|
|
ip.out = -1;
|
|
ip.git_cmd = 1;
|
|
if (start_command(&ip))
|
|
return "index-pack fork failed";
|
|
pack_lockfile = index_pack_lockfile(ip.out);
|
|
close(ip.out);
|
|
status = finish_command(&ip);
|
|
if (!status) {
|
|
reprepare_packed_git();
|
|
return NULL;
|
|
}
|
|
return "index-pack abnormal exit";
|
|
}
|
|
}
|
|
|
|
static void report(const char *unpack_status)
|
|
{
|
|
struct command *cmd;
|
|
packet_write(1, "unpack %s\n",
|
|
unpack_status ? unpack_status : "ok");
|
|
for (cmd = commands; cmd; cmd = cmd->next) {
|
|
if (!cmd->error_string)
|
|
packet_write(1, "ok %s\n",
|
|
cmd->ref_name);
|
|
else
|
|
packet_write(1, "ng %s %s\n",
|
|
cmd->ref_name, cmd->error_string);
|
|
}
|
|
packet_flush(1);
|
|
}
|
|
|
|
static int delete_only(struct command *cmd)
|
|
{
|
|
while (cmd) {
|
|
if (!is_null_sha1(cmd->new_sha1))
|
|
return 0;
|
|
cmd = cmd->next;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int i;
|
|
char *dir = NULL;
|
|
|
|
argv++;
|
|
for (i = 1; i < argc; i++) {
|
|
char *arg = *argv++;
|
|
|
|
if (*arg == '-') {
|
|
/* Do flag handling here */
|
|
usage(receive_pack_usage);
|
|
}
|
|
if (dir)
|
|
usage(receive_pack_usage);
|
|
dir = arg;
|
|
}
|
|
if (!dir)
|
|
usage(receive_pack_usage);
|
|
|
|
setup_path(NULL);
|
|
|
|
if (!enter_repo(dir, 0))
|
|
die("'%s': unable to chdir or not a git archive", dir);
|
|
|
|
if (is_repository_shallow())
|
|
die("attempt to push into a shallow repository");
|
|
|
|
git_config(receive_pack_config, NULL);
|
|
|
|
if (0 <= transfer_unpack_limit)
|
|
unpack_limit = transfer_unpack_limit;
|
|
else if (0 <= receive_unpack_limit)
|
|
unpack_limit = receive_unpack_limit;
|
|
|
|
write_head_info();
|
|
|
|
/* EOF */
|
|
packet_flush(1);
|
|
|
|
read_head_info();
|
|
if (commands) {
|
|
const char *unpack_status = NULL;
|
|
|
|
if (!delete_only(commands))
|
|
unpack_status = unpack();
|
|
execute_commands(unpack_status);
|
|
if (pack_lockfile)
|
|
unlink(pack_lockfile);
|
|
if (report_status)
|
|
report(unpack_status);
|
|
run_hook(post_receive_hook);
|
|
run_update_post_hook(commands);
|
|
}
|
|
return 0;
|
|
}
|