summaryrefslogtreecommitdiff
path: root/builtin-receive-pack.c
diff options
context:
space:
mode:
Diffstat (limited to 'builtin-receive-pack.c')
-rw-r--r--builtin-receive-pack.c697
1 files changed, 0 insertions, 697 deletions
diff --git a/builtin-receive-pack.c b/builtin-receive-pack.c
deleted file mode 100644
index e8bde02c27..0000000000
--- a/builtin-receive-pack.c
+++ /dev/null
@@ -1,697 +0,0 @@
-#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"
-#include "remote.h"
-#include "transport.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 prefer_ofs_delta = 1;
-static int auto_update_server_info;
-static int auto_gc = 1;
-static const char *head_name;
-static char *capabilities_to_send;
-
-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 (!capabilities_to_send)
- 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_to_send);
- capabilities_to_send = NULL;
- return 0;
-}
-
-static void write_head_info(void)
-{
- for_each_ref(show_ref, NULL);
- if (capabilities_to_send)
- 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 run_receive_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 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);
- return finish_command(&proc);
-}
-
-static int run_update_hook(struct command *cmd)
-{
- static const char update_hook[] = "hooks/update";
- 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;
-
- return run_command_v_opt(argv, RUN_COMMAND_NO_STDIN |
- RUN_COMMAND_STDOUT_TO_STDERR);
-}
-
-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 *warn_unconfigured_deny_msg[] = {
- "Updating the currently checked out branch may cause confusion,",
- "as the index and work tree do not reflect changes that are in HEAD.",
- "As a result, you may see the changes you just pushed into it",
- "reverted when you run 'git diff' over there, and you may want",
- "to run 'git reset --hard' before starting to work to recover.",
- "",
- "You can set 'receive.denyCurrentBranch' configuration variable to",
- "'refuse' in the remote repository to forbid pushing into its",
- "current branch."
- "",
- "To allow pushing into the current branch, you can set it to 'ignore';",
- "but 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, you can set it to 'warn'.",
- "",
- "Note that the default will change in a future version of git",
- "to refuse updating the current branch unless you have the",
- "configuration variable set to either 'ignore' or 'warn'."
-};
-
-static void warn_unconfigured_deny(void)
-{
- int i;
- for (i = 0; i < ARRAY_SIZE(warn_unconfigured_deny_msg); i++)
- warning("%s", warn_unconfigured_deny_msg[i]);
-}
-
-static char *warn_unconfigured_deny_delete_current_msg[] = {
- "Deleting the current branch can cause confusion by making the next",
- "'git clone' not check out any file.",
- "",
- "You can set 'receive.denyDeleteCurrent' configuration variable to",
- "'refuse' in the remote repository to disallow deleting the current",
- "branch.",
- "",
- "You can set it to 'ignore' to allow such a delete without a warning.",
- "",
- "To make this warning message less loud, you can set it to 'warn'.",
- "",
- "Note that the default will change in a future version of git",
- "to refuse deleting the current branch unless you have the",
- "configuration variable set to either 'ignore' or 'warn'."
-};
-
-static void warn_unconfigured_deny_delete_current(void)
-{
- int i;
- for (i = 0;
- i < ARRAY_SIZE(warn_unconfigured_deny_delete_current_msg);
- i++)
- warning("%s", warn_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)) {
- 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_UNCONFIGURED:
- case DENY_WARN:
- warning("updating the current branch");
- if (deny_current_branch == DENY_UNCONFIGURED)
- warn_unconfigured_deny();
- break;
- case DENY_REFUSE:
- error("refusing to update checked out branch: %s", name);
- 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/")) {
- 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:
- case DENY_UNCONFIGURED:
- if (deny_delete_current == DENY_UNCONFIGURED)
- warn_unconfigured_deny_delete_current();
- warning("deleting the current branch");
- break;
- case DENY_REFUSE:
- 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) {
- 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, 0)) {
- 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, status;
- 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;
- status = 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;
- unsigned char sha1[20];
-
- if (unpacker_error) {
- while (cmd) {
- cmd->error_string = "n/a (unpacker error)";
- cmd = cmd->next;
- }
- return;
- }
-
- if (run_receive_hook(pre_receive_hook)) {
- while (cmd) {
- cmd->error_string = "pre-receive hook declined";
- cmd = cmd->next;
- }
- return;
- }
-
- head_name = resolve_ref("HEAD", sha1, 0, NULL);
-
- 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=%"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(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;
-}
-
-static int add_refs_from_alternate(struct alternate_object_database *e, void *unused)
-{
- char *other;
- size_t len;
- struct remote *remote;
- struct transport *transport;
- const struct ref *extra;
-
- e->name[-1] = '\0';
- other = xstrdup(make_absolute_path(e->base));
- e->name[-1] = '/';
- len = strlen(other);
-
- while (other[len-1] == '/')
- other[--len] = '\0';
- if (len < 8 || memcmp(other + len - 8, "/objects", 8))
- return 0;
- /* Is this a git repository with refs? */
- memcpy(other + len - 8, "/refs", 6);
- if (!is_directory(other))
- return 0;
- other[len - 8] = '\0';
- remote = remote_get(other);
- transport = transport_get(remote, other);
- for (extra = transport_get_remote_refs(transport);
- extra;
- extra = extra->next) {
- add_extra_ref(".have", extra->old_sha1, 0);
- }
- transport_disconnect(transport);
- free(other);
- return 0;
-}
-
-static void add_alternate_refs(void)
-{
- foreach_alt_odb(add_refs_from_alternate, NULL);
-}
-
-int cmd_receive_pack(int argc, const char **argv, const char *prefix)
-{
- int i;
- char *dir = NULL;
-
- argv++;
- for (i = 1; i < argc; i++) {
- const char *arg = *argv++;
-
- if (*arg == '-') {
- /* Do flag handling here */
- 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;
-
- capabilities_to_send = (prefer_ofs_delta) ?
- " report-status delete-refs ofs-delta " :
- " report-status delete-refs ";
-
- add_alternate_refs();
- write_head_info();
- clear_extra_refs();
-
- /* 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_or_warn(pack_lockfile);
- if (report_status)
- report(unpack_status);
- run_receive_hook(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);
- }
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 05:56:02 +0000