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diff --git a/receive-pack.c b/receive-pack.c
index de1d6a4b1c3f51f8763484b6efea0a8ccd289bb3..26aa26bcb5089adcf400d12b673519e328b49a23 100644 (file)
--- a/receive-pack.c
+++ b/receive-pack.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 const char *unpacker[] = { "unpack-objects", NULL };
-
static int deny_non_fast_forwards = 0;
+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";
+static char capabilities[] = " report-status delete-refs ";
static int capabilities_sent;
static int receive_pack_config(const char *var, const char *value)
{
- git_default_config(var, value);
-
- if (strcmp(var, "receive.denynonfastforwards") == 0)
- {
+ if (strcmp(var, "receive.denynonfastforwards") == 0) {
deny_non_fast_forwards = git_config_bool(var, value);
return 0;
}
- 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;
+ }
+
+ return git_default_config(var, value);
}
static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
static struct command *commands;
-static char update_hook[] = "hooks/update";
+static const char pre_receive_hook[] = "hooks/pre-receive";
+static const char post_receive_hook[] = "hooks/post-receive";
-static int run_update_hook(const char *refname,
- char *old_hex, char *new_hex)
+static int hook_status(int code, const char *hook_name)
{
- int code;
-
- if (access(update_hook, X_OK) < 0)
- return 0;
- code = run_command(update_hook, refname, old_hex, new_hex, NULL);
switch (code) {
case 0:
return 0;
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", update_hook);
+ return error("%s died of signal", hook_name);
case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
- return error("%s died strangely", update_hook);
+ return error("%s died strangely", hook_name);
default:
- error("%s exited with error code %d", update_hook, -code);
+ error("%s exited with error code %d", hook_name, -code);
return -code;
}
}
-static int update(struct command *cmd)
+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;
+ }
+ }
+ 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;
- char new_hex[41], old_hex[41];
struct ref_lock *lock;
- cmd->error_string = NULL;
- if (!strncmp(name, "refs/", 5) && check_ref_format(name + 5)) {
- cmd->error_string = "funny refname";
- return error("refusing to create funny ref '%s' locally",
- name);
+ if (!prefixcmp(name, "refs/") && check_ref_format(name + 5)) {
+ error("refusing to create funny ref '%s' locally", name);
+ return "funny refname";
}
- strcpy(new_hex, sha1_to_hex(new_sha1));
- strcpy(old_hex, sha1_to_hex(old_sha1));
- if (!has_sha1_file(new_sha1)) {
- cmd->error_string = "bad pack";
- return error("unpack should have generated %s, "
- "but I can't find it!", new_hex);
+ 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(old_sha1)) {
+ if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
+ !is_null_sha1(old_sha1) &&
+ !prefixcmp(name, "refs/heads/")) {
struct commit *old_commit, *new_commit;
struct commit_list *bases, *ent;
if (!hashcmp(old_sha1, ent->item->object.sha1))
break;
free_commit_list(bases);
- if (!ent)
- return error("denying non-fast forward;"
- " you should pull first");
+ if (!ent) {
+ error("denying non-fast forward %s"
+ " (you should pull first)", name);
+ return "non-fast forward";
+ }
}
- if (run_update_hook(name, old_hex, new_hex)) {
- cmd->error_string = "hook declined";
- return error("hook declined to update %s", name);
+ if (run_update_hook(cmd)) {
+ error("hook declined to update %s", name);
+ return "hook declined";
}
- lock = lock_any_ref_for_update(name, old_sha1);
- if (!lock) {
- cmd->error_string = "failed to lock";
- return error("failed to lock %s", name);
+ if (is_null_sha1(new_sha1)) {
+ if (delete_ref(name, old_sha1)) {
+ error("failed to delete %s", name);
+ return "failed to delete";
+ }
+ fprintf(stderr, "%s: %s -> deleted\n", name,
+ sha1_to_hex(old_sha1));
+ return NULL; /* good */
+ }
+ else {
+ lock = lock_any_ref_for_update(name, old_sha1);
+ 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 */
+ }
+ fprintf(stderr, "%s: %s -> %s\n", name,
+ sha1_to_hex(old_sha1), sha1_to_hex(new_sha1));
+ return NULL; /* good */
}
- write_ref_sha1(lock, new_sha1, "push");
-
- fprintf(stderr, "%s: %s -> %s\n", name, old_hex, new_hex);
- return 0;
}
static char update_post_hook[] = "hooks/post-update";
int argc;
const char **argv;
- if (access(update_post_hook, X_OK) < 0)
- return;
- for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
+ for (argc = 0, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
if (cmd_p->error_string)
continue;
argc++;
}
- argv = xmalloc(sizeof(*argv) * (1 + 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) {
argc++;
}
argv[argc] = NULL;
- run_command_v_opt(argc, argv, RUN_COMMAND_NO_STDIO);
+ run_command_v_opt(argv, RUN_COMMAND_NO_STDIN
+ | RUN_COMMAND_STDOUT_TO_STDERR);
}
-/*
- * This gets called after(if) we've successfully
- * unpacked the data payload.
- */
-static void execute_commands(void)
+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) {
- update(cmd);
+ cmd->error_string = update(cmd);
cmd = cmd->next;
}
- run_update_post_hook(commands);
}
static void read_head_info(void)
hashcpy(cmd->old_sha1, old_sha1);
hashcpy(cmd->new_sha1, new_sha1);
memcpy(cmd->ref_name, line + 82, len - 81);
- cmd->error_string = "n/a (unpacker error)";
+ cmd->error_string = NULL;
cmd->next = NULL;
*p = cmd;
p = &cmd->next;
}
}
-static const char *unpack(int *error_code)
+static const char *parse_pack_header(struct pack_header *hdr)
{
- int code = run_command_v_opt(1, unpacker, RUN_GIT_CMD);
+ 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";
- *error_code = 0;
- 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:
- *error_code = -code;
- return "unpacker exited with error code";
+ }
+}
+
+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;
+ const char *unpacker[3];
+ unpacker[0] = "unpack-objects";
+ unpacker[1] = hdr_arg;
+ unpacker[2] = 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[6];
+ int s, len, status;
+ char keep_arg[256];
+ char packname[46];
+ 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[0] = "index-pack";
+ keeper[1] = "--stdin";
+ keeper[2] = "--fix-thin";
+ keeper[3] = hdr_arg;
+ keeper[4] = keep_arg;
+ keeper[5] = 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";
+
+ /*
+ * The first thing we expects from index-pack's output
+ * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where
+ * %40s is the newly created pack SHA1 name. In the "keep"
+ * case, we need it to remove the corresponding .keep file
+ * later on. If we don't get that then tough luck with it.
+ */
+ for (len = 0;
+ len < 46 && (s = xread(ip.out, packname+len, 46-len)) > 0;
+ len += s);
+ if (len == 46 && packname[45] == '\n' &&
+ memcmp(packname, "keep\t", 5) == 0) {
+ char path[PATH_MAX];
+ packname[45] = 0;
+ snprintf(path, sizeof(path), "%s/pack/pack-%s.keep",
+ get_object_directory(), packname + 5);
+ pack_lockfile = xstrdup(path);
+ }
+
+ status = finish_command(&ip);
+ if (!status) {
+ reprepare_packed_git();
+ return NULL;
+ }
+ return "index-pack abnormal exit";
}
}
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;
if (!enter_repo(dir, 0))
die("'%s': unable to chdir or not a git archive", dir);
- setup_ident();
+ if (is_repository_shallow())
+ die("attempt to push into a shallow repository");
+
git_config(receive_pack_config);
+ 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 */
read_head_info();
if (commands) {
- int code;
- const char *unpack_status = unpack(&code);
- if (!unpack_status)
- execute_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;
}