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-rw-r--r--builtin/receive-pack.c254
1 files changed, 186 insertions, 68 deletions
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index d634b5a3d5..7ec68a1e80 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1,4 +1,4 @@
-#include "cache.h"
+#include "builtin.h"
#include "pack.h"
#include "refs.h"
#include "pkt-line.h"
@@ -10,6 +10,8 @@
#include "remote.h"
#include "transport.h"
#include "string-list.h"
+#include "sha1-array.h"
+#include "connected.h"
static const char receive_pack_usage[] = "git receive-pack <git-dir>";
@@ -24,7 +26,8 @@ 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_fsck_objects = -1;
+static int transfer_fsck_objects = -1;
static int receive_unpack_limit = -1;
static int transfer_unpack_limit = -1;
static int unpack_limit = 100;
@@ -78,6 +81,11 @@ static int receive_pack_config(const char *var, const char *value, void *cb)
return 0;
}
+ if (strcmp(var, "transfer.fsckobjects") == 0) {
+ transfer_fsck_objects = git_config_bool(var, value);
+ return 0;
+ }
+
if (!strcmp(var, "receive.denycurrentbranch")) {
deny_current_branch = parse_deny_action(var, value);
return 0;
@@ -119,9 +127,25 @@ static int show_ref(const char *path, const unsigned char *sha1, int flag, void
return 0;
}
+static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, void *cb_data)
+{
+ path = strip_namespace(path);
+ /*
+ * Advertise refs outside our current namespace as ".have"
+ * refs, so that the client can use them to minimize data
+ * transfer but will otherwise ignore them. This happens to
+ * cover ".have" that are thrown in by add_one_alternate_ref()
+ * to mark histories that are complete in our alternates as
+ * well.
+ */
+ if (!path)
+ path = ".have";
+ return show_ref(path, sha1, flag, cb_data);
+}
+
static void write_head_info(void)
{
- for_each_ref(show_ref, NULL);
+ for_each_ref(show_ref_cb, NULL);
if (!sent_capabilities)
show_ref("capabilities^{}", null_sha1, 0, NULL);
@@ -130,7 +154,8 @@ static void write_head_info(void)
struct command {
struct command *next;
const char *error_string;
- unsigned int skip_update;
+ unsigned int skip_update:1,
+ did_not_exist:1;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
char ref_name[FLEX_ARRAY]; /* more */
@@ -188,21 +213,15 @@ static int copy_to_sideband(int in, int out, void *arg)
return 0;
}
-static int run_receive_hook(struct command *commands, const char *hook_name)
+typedef int (*feed_fn)(void *, const char **, size_t *);
+static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_state)
{
- 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;
- }
+ int code;
- if (!have_input || access(hook_name, X_OK) < 0)
+ if (access(hook_name, X_OK) < 0)
return 0;
argv[0] = hook_name;
@@ -230,15 +249,13 @@ static int run_receive_hook(struct command *commands, const char *hook_name)
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;
- }
+ while (1) {
+ const char *buf;
+ size_t n;
+ if (feed(feed_state, &buf, &n))
+ break;
+ if (write_in_full(proc.in, buf, n) != n)
+ break;
}
close(proc.in);
if (use_sideband)
@@ -246,6 +263,51 @@ static int run_receive_hook(struct command *commands, const char *hook_name)
return finish_command(&proc);
}
+struct receive_hook_feed_state {
+ struct command *cmd;
+ int skip_broken;
+ struct strbuf buf;
+};
+
+static int feed_receive_hook(void *state_, const char **bufp, size_t *sizep)
+{
+ struct receive_hook_feed_state *state = state_;
+ struct command *cmd = state->cmd;
+
+ while (cmd &&
+ state->skip_broken && (cmd->error_string || cmd->did_not_exist))
+ cmd = cmd->next;
+ if (!cmd)
+ return -1; /* EOF */
+ strbuf_reset(&state->buf);
+ strbuf_addf(&state->buf, "%s %s %s\n",
+ sha1_to_hex(cmd->old_sha1), sha1_to_hex(cmd->new_sha1),
+ cmd->ref_name);
+ state->cmd = cmd->next;
+ if (bufp) {
+ *bufp = state->buf.buf;
+ *sizep = state->buf.len;
+ }
+ return 0;
+}
+
+static int run_receive_hook(struct command *commands, const char *hook_name,
+ int skip_broken)
+{
+ struct receive_hook_feed_state state;
+ int status;
+
+ strbuf_init(&state.buf, 0);
+ state.cmd = commands;
+ state.skip_broken = skip_broken;
+ if (feed_receive_hook(&state, NULL, NULL))
+ return 0;
+ state.cmd = commands;
+ status = run_and_feed_hook(hook_name, feed_receive_hook, &state);
+ strbuf_release(&state.buf);
+ return status;
+}
+
static int run_update_hook(struct command *cmd)
{
static const char update_hook[] = "hooks/update";
@@ -332,17 +394,22 @@ static void refuse_unconfigured_deny_delete_current(void)
static const char *update(struct command *cmd)
{
const char *name = cmd->ref_name;
+ struct strbuf namespaced_name_buf = STRBUF_INIT;
+ const char *namespaced_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)) {
+ if (prefixcmp(name, "refs/") || check_refname_format(name + 5, 0)) {
rp_error("refusing to create funny ref '%s' remotely", name);
return "funny refname";
}
- if (is_ref_checked_out(name)) {
+ strbuf_addf(&namespaced_name_buf, "%s%s", get_git_namespace(), name);
+ namespaced_name = strbuf_detach(&namespaced_name_buf, NULL);
+
+ if (is_ref_checked_out(namespaced_name)) {
switch (deny_current_branch) {
case DENY_IGNORE:
break;
@@ -370,7 +437,7 @@ static const char *update(struct command *cmd)
return "deletion prohibited";
}
- if (!strcmp(name, head_name)) {
+ if (!strcmp(namespaced_name, head_name)) {
switch (deny_delete_current) {
case DENY_IGNORE:
break;
@@ -423,17 +490,22 @@ static const char *update(struct command *cmd)
if (is_null_sha1(new_sha1)) {
if (!parse_object(old_sha1)) {
- rp_warning("Allowing deletion of corrupt ref.");
old_sha1 = NULL;
+ if (ref_exists(name)) {
+ rp_warning("Allowing deletion of corrupt ref.");
+ } else {
+ rp_warning("Deleting a non-existent ref.");
+ cmd->did_not_exist = 1;
+ }
}
- if (delete_ref(name, old_sha1, 0)) {
+ if (delete_ref(namespaced_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);
+ lock = lock_any_ref_for_update(namespaced_name, old_sha1, 0);
if (!lock) {
rp_error("failed to lock %s", name);
return "failed to lock";
@@ -455,7 +527,7 @@ static void run_update_post_hook(struct command *commands)
struct child_process proc;
for (argc = 0, cmd = commands; cmd; cmd = cmd->next) {
- if (cmd->error_string)
+ if (cmd->error_string || cmd->did_not_exist)
continue;
argc++;
}
@@ -466,7 +538,7 @@ static void run_update_post_hook(struct command *commands)
for (argc = 1, cmd = commands; cmd; cmd = cmd->next) {
char *p;
- if (cmd->error_string)
+ if (cmd->error_string || cmd->did_not_exist)
continue;
p = xmalloc(strlen(cmd->ref_name) + 1);
strcpy(p, cmd->ref_name);
@@ -490,17 +562,29 @@ static void run_update_post_hook(struct command *commands)
static void check_aliased_update(struct command *cmd, struct string_list *list)
{
+ struct strbuf buf = STRBUF_INIT;
+ const char *dst_name;
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);
+ strbuf_addf(&buf, "%s%s", get_git_namespace(), cmd->ref_name);
+ dst_name = resolve_ref(buf.buf, sha1, 0, &flag);
+ strbuf_release(&buf);
if (!(flag & REF_ISSYMREF))
return;
+ dst_name = strip_namespace(dst_name);
+ if (!dst_name) {
+ rp_error("refusing update to broken symref '%s'", cmd->ref_name);
+ cmd->skip_update = 1;
+ cmd->error_string = "broken symref";
+ return;
+ }
+
if ((item = string_list_lookup(list, dst_name)) == NULL)
return;
@@ -530,7 +614,7 @@ static void check_aliased_update(struct command *cmd, struct string_list *list)
static void check_aliased_updates(struct command *commands)
{
struct command *cmd;
- struct string_list ref_list = { NULL, 0, 0, 0 };
+ struct string_list ref_list = STRING_LIST_INIT_NODUP;
for (cmd = commands; cmd; cmd = cmd->next) {
struct string_list_item *item =
@@ -545,6 +629,48 @@ static void check_aliased_updates(struct command *commands)
string_list_clear(&ref_list, 0);
}
+static int command_singleton_iterator(void *cb_data, unsigned char sha1[20])
+{
+ struct command **cmd_list = cb_data;
+ struct command *cmd = *cmd_list;
+
+ if (!cmd || is_null_sha1(cmd->new_sha1))
+ return -1; /* end of list */
+ *cmd_list = NULL; /* this returns only one */
+ hashcpy(sha1, cmd->new_sha1);
+ return 0;
+}
+
+static void set_connectivity_errors(struct command *commands)
+{
+ struct command *cmd;
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ struct command *singleton = cmd;
+ if (!check_everything_connected(command_singleton_iterator,
+ 0, &singleton))
+ continue;
+ cmd->error_string = "missing necessary objects";
+ }
+}
+
+static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20])
+{
+ struct command **cmd_list = cb_data;
+ struct command *cmd = *cmd_list;
+
+ while (cmd) {
+ if (!is_null_sha1(cmd->new_sha1)) {
+ hashcpy(sha1, cmd->new_sha1);
+ *cmd_list = cmd->next;
+ return 0;
+ }
+ cmd = cmd->next;
+ }
+ *cmd_list = NULL;
+ return -1; /* end of list */
+}
+
static void execute_commands(struct command *commands, const char *unpacker_error)
{
struct command *cmd;
@@ -556,7 +682,12 @@ static void execute_commands(struct command *commands, const char *unpacker_erro
return;
}
- if (run_receive_hook(commands, pre_receive_hook)) {
+ cmd = commands;
+ if (check_everything_connected(iterate_receive_command_list,
+ 0, &cmd))
+ set_connectivity_errors(commands);
+
+ if (run_receive_hook(commands, pre_receive_hook, 0)) {
for (cmd = commands; cmd; cmd = cmd->next)
cmd->error_string = "pre-receive hook declined";
return;
@@ -640,6 +771,11 @@ static const char *unpack(void)
struct pack_header hdr;
const char *hdr_err;
char hdr_arg[38];
+ int fsck_objects = (receive_fsck_objects >= 0
+ ? receive_fsck_objects
+ : transfer_fsck_objects >= 0
+ ? transfer_fsck_objects
+ : 0);
hdr_err = parse_pack_header(&hdr);
if (hdr_err)
@@ -652,7 +788,7 @@ static const char *unpack(void)
int code, i = 0;
const char *unpacker[4];
unpacker[i++] = "unpack-objects";
- if (receive_fsck_objects)
+ if (fsck_objects)
unpacker[i++] = "--strict";
unpacker[i++] = hdr_arg;
unpacker[i++] = NULL;
@@ -672,7 +808,7 @@ static const char *unpack(void)
keeper[i++] = "index-pack";
keeper[i++] = "--stdin";
- if (receive_fsck_objects)
+ if (fsck_objects)
keeper[i++] = "--strict";
keeper[i++] = "--fix-thin";
keeper[i++] = hdr_arg;
@@ -731,43 +867,23 @@ static int delete_only(struct command *commands)
return 1;
}
-static int add_refs_from_alternate(struct alternate_object_database *e, void *unused)
+static void add_one_alternate_sha1(const unsigned char sha1[20], 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);
+ add_extra_ref(".have", sha1, 0);
+}
- 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 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)
{
- foreach_alt_odb(add_refs_from_alternate, NULL);
+ 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)
@@ -778,6 +894,8 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
char *dir = NULL;
struct command *commands;
+ packet_trace_identity("receive-pack");
+
argv++;
for (i = 1; i < argc; i++) {
const char *arg = *argv++;
@@ -837,7 +955,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
unlink_or_warn(pack_lockfile);
if (report_status)
report(commands, unpack_status);
- run_receive_hook(commands, post_receive_hook);
+ run_receive_hook(commands, post_receive_hook, 1);
run_update_post_hook(commands);
if (auto_gc) {
const char *argv_gc_auto[] = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 19:24:30 +0000