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-rw-r--r--builtin/receive-pack.c837
1 files changed, 837 insertions, 0 deletions
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
new file mode 100644
index 0000000..e1a687a
--- /dev/null
+++ b/builtin/receive-pack.c
@@ -0,0 +1,837 @@
+#include "builtin.h"
+#include "pack.h"
+#include "refs.h"
+#include "pkt-line.h"
+#include "sideband.h"
+#include "run-command.h"
+#include "exec_cmd.h"
+#include "commit.h"
+#include "object.h"
+#include "remote.h"
+#include "transport.h"
+#include "string-list.h"
+#include "sha1-array.h"
+
+static const char receive_pack_usage[] = "git receive-pack <git-dir>";
+
+enum deny_action {
+ DENY_UNCONFIGURED,
+ DENY_IGNORE,
+ DENY_WARN,
+ DENY_REFUSE
+};
+
+static int deny_deletes;
+static int deny_non_fast_forwards;
+static enum deny_action deny_current_branch = DENY_UNCONFIGURED;
+static enum deny_action deny_delete_current = DENY_UNCONFIGURED;
+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 int use_sideband;
+static int prefer_ofs_delta = 1;
+static int auto_update_server_info;
+static int auto_gc = 1;
+static const char *head_name;
+static int sent_capabilities;
+
+static enum deny_action parse_deny_action(const char *var, const char *value)
+{
+ if (value) {
+ if (!strcasecmp(value, "ignore"))
+ return DENY_IGNORE;
+ if (!strcasecmp(value, "warn"))
+ return DENY_WARN;
+ if (!strcasecmp(value, "refuse"))
+ return DENY_REFUSE;
+ }
+ if (git_config_bool(var, value))
+ return DENY_REFUSE;
+ return DENY_IGNORE;
+}
+
+static int receive_pack_config(const char *var, const char *value, void *cb)
+{
+ if (strcmp(var, "receive.denydeletes") == 0) {
+ deny_deletes = git_config_bool(var, value);
+ return 0;
+ }
+
+ 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;
+ }
+
+ if (!strcmp(var, "receive.denycurrentbranch")) {
+ deny_current_branch = parse_deny_action(var, value);
+ return 0;
+ }
+
+ if (strcmp(var, "receive.denydeletecurrent") == 0) {
+ deny_delete_current = parse_deny_action(var, value);
+ return 0;
+ }
+
+ if (strcmp(var, "repack.usedeltabaseoffset") == 0) {
+ prefer_ofs_delta = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (strcmp(var, "receive.updateserverinfo") == 0) {
+ auto_update_server_info = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (strcmp(var, "receive.autogc") == 0) {
+ auto_gc = 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 (sent_capabilities)
+ packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
+ else
+ packet_write(1, "%s %s%c%s%s\n",
+ sha1_to_hex(sha1), path, 0,
+ " report-status delete-refs side-band-64k",
+ prefer_ofs_delta ? " ofs-delta" : "");
+ sent_capabilities = 1;
+ return 0;
+}
+
+static void write_head_info(void)
+{
+ for_each_ref(show_ref, NULL);
+ if (!sent_capabilities)
+ show_ref("capabilities^{}", null_sha1, 0, NULL);
+
+}
+
+struct command {
+ struct command *next;
+ const char *error_string;
+ unsigned int skip_update;
+ unsigned char old_sha1[20];
+ unsigned char new_sha1[20];
+ char ref_name[FLEX_ARRAY]; /* more */
+};
+
+static const char pre_receive_hook[] = "hooks/pre-receive";
+static const char post_receive_hook[] = "hooks/post-receive";
+
+static void rp_error(const char *err, ...) __attribute__((format (printf, 1, 2)));
+static void rp_warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
+
+static void report_message(const char *prefix, const char *err, va_list params)
+{
+ int sz = strlen(prefix);
+ char msg[4096];
+
+ strncpy(msg, prefix, sz);
+ sz += vsnprintf(msg + sz, sizeof(msg) - sz, err, params);
+ if (sz > (sizeof(msg) - 1))
+ sz = sizeof(msg) - 1;
+ msg[sz++] = '\n';
+
+ if (use_sideband)
+ send_sideband(1, 2, msg, sz, use_sideband);
+ else
+ xwrite(2, msg, sz);
+}
+
+static void rp_warning(const char *err, ...)
+{
+ va_list params;
+ va_start(params, err);
+ report_message("warning: ", err, params);
+ va_end(params);
+}
+
+static void rp_error(const char *err, ...)
+{
+ va_list params;
+ va_start(params, err);
+ report_message("error: ", err, params);
+ va_end(params);
+}
+
+static int copy_to_sideband(int in, int out, void *arg)
+{
+ char data[128];
+ while (1) {
+ ssize_t sz = xread(in, data, sizeof(data));
+ if (sz <= 0)
+ break;
+ send_sideband(1, 2, data, sz, use_sideband);
+ }
+ close(in);
+ return 0;
+}
+
+static int run_receive_hook(struct command *commands, const char *hook_name)
+{
+ static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
+ struct command *cmd;
+ struct child_process proc;
+ struct async muxer;
+ 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;
+
+ if (use_sideband) {
+ memset(&muxer, 0, sizeof(muxer));
+ muxer.proc = copy_to_sideband;
+ muxer.in = -1;
+ code = start_async(&muxer);
+ if (code)
+ return code;
+ proc.err = muxer.in;
+ }
+
+ code = start_command(&proc);
+ if (code) {
+ if (use_sideband)
+ finish_async(&muxer);
+ return code;
+ }
+
+ 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);
+ if (use_sideband)
+ finish_async(&muxer);
+ return finish_command(&proc);
+}
+
+static int run_update_hook(struct command *cmd)
+{
+ static const char update_hook[] = "hooks/update";
+ const char *argv[5];
+ struct child_process proc;
+ int code;
+
+ 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.no_stdin = 1;
+ proc.stdout_to_stderr = 1;
+ proc.err = use_sideband ? -1 : 0;
+ proc.argv = argv;
+
+ code = start_command(&proc);
+ if (code)
+ return code;
+ if (use_sideband)
+ copy_to_sideband(proc.err, -1, NULL);
+ return finish_command(&proc);
+}
+
+static int is_ref_checked_out(const char *ref)
+{
+ if (is_bare_repository())
+ return 0;
+
+ if (!head_name)
+ return 0;
+ return !strcmp(head_name, ref);
+}
+
+static char *refuse_unconfigured_deny_msg[] = {
+ "By default, updating the current branch in a non-bare repository",
+ "is denied, because it will make the index and work tree inconsistent",
+ "with what you pushed, and will require 'git reset --hard' to match",
+ "the work tree to HEAD.",
+ "",
+ "You can set 'receive.denyCurrentBranch' configuration variable to",
+ "'ignore' or 'warn' in the remote repository to allow pushing into",
+ "its current branch; however, this is not recommended unless you",
+ "arranged to update its work tree to match what you pushed in some",
+ "other way.",
+ "",
+ "To squelch this message and still keep the default behaviour, set",
+ "'receive.denyCurrentBranch' configuration variable to 'refuse'."
+};
+
+static void refuse_unconfigured_deny(void)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(refuse_unconfigured_deny_msg); i++)
+ rp_error("%s", refuse_unconfigured_deny_msg[i]);
+}
+
+static char *refuse_unconfigured_deny_delete_current_msg[] = {
+ "By default, deleting the current branch is denied, because the next",
+ "'git clone' won't result in any file checked out, causing confusion.",
+ "",
+ "You can set 'receive.denyDeleteCurrent' configuration variable to",
+ "'warn' or 'ignore' in the remote repository to allow deleting the",
+ "current branch, with or without a warning message.",
+ "",
+ "To squelch this message, you can set it to 'refuse'."
+};
+
+static void refuse_unconfigured_deny_delete_current(void)
+{
+ int i;
+ for (i = 0;
+ i < ARRAY_SIZE(refuse_unconfigured_deny_delete_current_msg);
+ i++)
+ rp_error("%s", refuse_unconfigured_deny_delete_current_msg[i]);
+}
+
+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)) {
+ rp_error("refusing to create funny ref '%s' remotely", name);
+ return "funny refname";
+ }
+
+ if (is_ref_checked_out(name)) {
+ switch (deny_current_branch) {
+ case DENY_IGNORE:
+ break;
+ case DENY_WARN:
+ rp_warning("updating the current branch");
+ break;
+ case DENY_REFUSE:
+ case DENY_UNCONFIGURED:
+ rp_error("refusing to update checked out branch: %s", name);
+ if (deny_current_branch == DENY_UNCONFIGURED)
+ refuse_unconfigured_deny();
+ return "branch is currently checked out";
+ }
+ }
+
+ 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 (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) {
+ if (deny_deletes && !prefixcmp(name, "refs/heads/")) {
+ rp_error("denying ref deletion for %s", name);
+ return "deletion prohibited";
+ }
+
+ if (!strcmp(name, head_name)) {
+ switch (deny_delete_current) {
+ case DENY_IGNORE:
+ break;
+ case DENY_WARN:
+ rp_warning("deleting the current branch");
+ break;
+ case DENY_REFUSE:
+ case DENY_UNCONFIGURED:
+ if (deny_delete_current == DENY_UNCONFIGURED)
+ refuse_unconfigured_deny_delete_current();
+ rp_error("refusing to delete the current branch: %s", name);
+ return "deletion of the current branch prohibited";
+ }
+ }
+ }
+
+ 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) {
+ rp_error("denying non-fast-forward %s"
+ " (you should pull first)", name);
+ return "non-fast-forward";
+ }
+ }
+ if (run_update_hook(cmd)) {
+ rp_error("hook declined to update %s", name);
+ return "hook declined";
+ }
+
+ if (is_null_sha1(new_sha1)) {
+ if (!parse_object(old_sha1)) {
+ rp_warning("Allowing deletion of corrupt ref.");
+ old_sha1 = NULL;
+ }
+ if (delete_ref(name, old_sha1, 0)) {
+ rp_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) {
+ rp_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 *commands)
+{
+ struct command *cmd;
+ int argc;
+ const char **argv;
+ struct child_process proc;
+
+ for (argc = 0, cmd = commands; cmd; cmd = cmd->next) {
+ if (cmd->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 = commands; cmd; cmd = cmd->next) {
+ char *p;
+ if (cmd->error_string)
+ continue;
+ p = xmalloc(strlen(cmd->ref_name) + 1);
+ strcpy(p, cmd->ref_name);
+ argv[argc] = p;
+ argc++;
+ }
+ argv[argc] = NULL;
+
+ memset(&proc, 0, sizeof(proc));
+ proc.no_stdin = 1;
+ proc.stdout_to_stderr = 1;
+ proc.err = use_sideband ? -1 : 0;
+ proc.argv = argv;
+
+ if (!start_command(&proc)) {
+ if (use_sideband)
+ copy_to_sideband(proc.err, -1, NULL);
+ finish_command(&proc);
+ }
+}
+
+static void check_aliased_update(struct command *cmd, struct string_list *list)
+{
+ struct string_list_item *item;
+ struct command *dst_cmd;
+ unsigned char sha1[20];
+ char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41];
+ int flag;
+
+ const char *dst_name = resolve_ref(cmd->ref_name, sha1, 0, &flag);
+
+ if (!(flag & REF_ISSYMREF))
+ return;
+
+ if ((item = string_list_lookup(list, dst_name)) == NULL)
+ return;
+
+ cmd->skip_update = 1;
+
+ dst_cmd = (struct command *) item->util;
+
+ if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) &&
+ !hashcmp(cmd->new_sha1, dst_cmd->new_sha1))
+ return;
+
+ dst_cmd->skip_update = 1;
+
+ strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV));
+ strcpy(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV));
+ strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV));
+ strcpy(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV));
+ rp_error("refusing inconsistent update between symref '%s' (%s..%s) and"
+ " its target '%s' (%s..%s)",
+ cmd->ref_name, cmd_oldh, cmd_newh,
+ dst_cmd->ref_name, dst_oldh, dst_newh);
+
+ cmd->error_string = dst_cmd->error_string =
+ "inconsistent aliased update";
+}
+
+static void check_aliased_updates(struct command *commands)
+{
+ struct command *cmd;
+ struct string_list ref_list = STRING_LIST_INIT_NODUP;
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ struct string_list_item *item =
+ string_list_append(&ref_list, cmd->ref_name);
+ item->util = (void *)cmd;
+ }
+ sort_string_list(&ref_list);
+
+ for (cmd = commands; cmd; cmd = cmd->next)
+ check_aliased_update(cmd, &ref_list);
+
+ string_list_clear(&ref_list, 0);
+}
+
+static void execute_commands(struct command *commands, const char *unpacker_error)
+{
+ struct command *cmd;
+ unsigned char sha1[20];
+
+ if (unpacker_error) {
+ for (cmd = commands; cmd; cmd = cmd->next)
+ cmd->error_string = "n/a (unpacker error)";
+ return;
+ }
+
+ if (run_receive_hook(commands, pre_receive_hook)) {
+ for (cmd = commands; cmd; cmd = cmd->next)
+ cmd->error_string = "pre-receive hook declined";
+ return;
+ }
+
+ check_aliased_updates(commands);
+
+ head_name = resolve_ref("HEAD", sha1, 0, NULL);
+
+ for (cmd = commands; cmd; cmd = cmd->next)
+ if (!cmd->skip_update)
+ cmd->error_string = update(cmd);
+}
+
+static struct command *read_head_info(void)
+{
+ struct command *commands = NULL;
+ 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;
+ if (strstr(refname + reflen + 1, "side-band-64k"))
+ use_sideband = LARGE_PACKET_MAX;
+ }
+ cmd = xcalloc(1, 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);
+ *p = cmd;
+ p = &cmd->next;
+ }
+ return commands;
+}
+
+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=%"PRIu32",%"PRIu32,
+ 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);
+ if (!code)
+ return NULL;
+ return "unpack-objects abnormal exit";
+ } 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 %"PRIuMAX" on ", (uintmax_t) 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;
+ status = start_command(&ip);
+ if (status) {
+ 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(struct command *commands, const char *unpack_status)
+{
+ struct command *cmd;
+ struct strbuf buf = STRBUF_INIT;
+
+ packet_buf_write(&buf, "unpack %s\n",
+ unpack_status ? unpack_status : "ok");
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (!cmd->error_string)
+ packet_buf_write(&buf, "ok %s\n",
+ cmd->ref_name);
+ else
+ packet_buf_write(&buf, "ng %s %s\n",
+ cmd->ref_name, cmd->error_string);
+ }
+ packet_buf_flush(&buf);
+
+ if (use_sideband)
+ send_sideband(1, 1, buf.buf, buf.len, use_sideband);
+ else
+ safe_write(1, buf.buf, buf.len);
+ strbuf_release(&buf);
+}
+
+static int delete_only(struct command *commands)
+{
+ struct command *cmd;
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (!is_null_sha1(cmd->new_sha1))
+ return 0;
+ }
+ return 1;
+}
+
+static void add_one_alternate_sha1(const unsigned char sha1[20], void *unused)
+{
+ add_extra_ref(".have", sha1, 0);
+}
+
+static void collect_one_alternate_ref(const struct ref *ref, void *data)
+{
+ struct sha1_array *sa = data;
+ sha1_array_append(sa, ref->old_sha1);
+}
+
+static void add_alternate_refs(void)
+{
+ struct sha1_array sa = SHA1_ARRAY_INIT;
+ for_each_alternate_ref(collect_one_alternate_ref, &sa);
+ sha1_array_for_each_unique(&sa, add_one_alternate_sha1, NULL);
+ sha1_array_clear(&sa);
+}
+
+int cmd_receive_pack(int argc, const char **argv, const char *prefix)
+{
+ int advertise_refs = 0;
+ int stateless_rpc = 0;
+ int i;
+ char *dir = NULL;
+ struct command *commands;
+
+ packet_trace_identity("receive-pack");
+
+ argv++;
+ for (i = 1; i < argc; i++) {
+ const char *arg = *argv++;
+
+ if (*arg == '-') {
+ if (!strcmp(arg, "--advertise-refs")) {
+ advertise_refs = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--stateless-rpc")) {
+ stateless_rpc = 1;
+ continue;
+ }
+
+ usage(receive_pack_usage);
+ }
+ if (dir)
+ usage(receive_pack_usage);
+ dir = xstrdup(arg);
+ }
+ if (!dir)
+ usage(receive_pack_usage);
+
+ setup_path();
+
+ if (!enter_repo(dir, 0))
+ die("'%s' does not appear to be a git repository", 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;
+
+ if (advertise_refs || !stateless_rpc) {
+ add_alternate_refs();
+ write_head_info();
+ clear_extra_refs();
+
+ /* EOF */
+ packet_flush(1);
+ }
+ if (advertise_refs)
+ return 0;
+
+ if ((commands = read_head_info()) != NULL) {
+ const char *unpack_status = NULL;
+
+ if (!delete_only(commands))
+ unpack_status = unpack();
+ execute_commands(commands, unpack_status);
+ if (pack_lockfile)
+ unlink_or_warn(pack_lockfile);
+ if (report_status)
+ report(commands, unpack_status);
+ run_receive_hook(commands, post_receive_hook);
+ run_update_post_hook(commands);
+ if (auto_gc) {
+ const char *argv_gc_auto[] = {
+ "gc", "--auto", "--quiet", NULL,
+ };
+ run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
+ }
+ if (auto_update_server_info)
+ update_server_info(0);
+ }
+ if (use_sideband)
+ packet_flush(1);
+ return 0;
+}