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-rw-r--r--builtin/receive-pack.c392
1 files changed, 294 insertions, 98 deletions
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index e1a687ad07..62ba6e7a3d 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -11,6 +11,8 @@
#include "transport.h"
#include "string-list.h"
#include "sha1-array.h"
+#include "connected.h"
+#include "version.h"
static const char receive_pack_usage[] = "git receive-pack <git-dir>";
@@ -25,16 +27,19 @@ 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;
static int report_status;
static int use_sideband;
+static int quiet;
static int prefer_ofs_delta = 1;
static int auto_update_server_info;
static int auto_gc = 1;
static const char *head_name;
+static void *head_name_to_free;
static int sent_capabilities;
static enum deny_action parse_deny_action(const char *var, const char *value)
@@ -54,6 +59,11 @@ static enum deny_action parse_deny_action(const char *var, const char *value)
static int receive_pack_config(const char *var, const char *value, void *cb)
{
+ int status = parse_hide_refs_config(var, value, "receive");
+
+ if (status)
+ return status;
+
if (strcmp(var, "receive.denydeletes") == 0) {
deny_deletes = git_config_bool(var, value);
return 0;
@@ -79,6 +89,11 @@ 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;
@@ -107,39 +122,74 @@ static int receive_pack_config(const char *var, const char *value, void *cb)
return git_default_config(var, value, cb);
}
-static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
+static void show_ref(const char *path, const unsigned char *sha1)
{
+ if (ref_is_hidden(path))
+ return;
+
if (sent_capabilities)
packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
else
- packet_write(1, "%s %s%c%s%s\n",
+ packet_write(1, "%s %s%c%s%s agent=%s\n",
sha1_to_hex(sha1), path, 0,
- " report-status delete-refs side-band-64k",
- prefer_ofs_delta ? " ofs-delta" : "");
+ " report-status delete-refs side-band-64k quiet",
+ prefer_ofs_delta ? " ofs-delta" : "",
+ git_user_agent_sanitized());
sent_capabilities = 1;
+}
+
+static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, void *unused)
+{
+ 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";
+ show_ref(path, sha1);
return 0;
}
+static void show_one_alternate_sha1(const unsigned char sha1[20], void *unused)
+{
+ show_ref(".have", sha1);
+}
+
+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 write_head_info(void)
{
- for_each_ref(show_ref, NULL);
+ struct sha1_array sa = SHA1_ARRAY_INIT;
+ for_each_alternate_ref(collect_one_alternate_ref, &sa);
+ sha1_array_for_each_unique(&sa, show_one_alternate_sha1, NULL);
+ sha1_array_clear(&sa);
+ for_each_ref(show_ref_cb, NULL);
if (!sent_capabilities)
- show_ref("capabilities^{}", null_sha1, 0, NULL);
+ show_ref("capabilities^{}", null_sha1);
+ /* EOF */
+ packet_flush(1);
}
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 */
};
-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)));
@@ -189,24 +239,18 @@ 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)
+ argv[0] = find_hook(hook_name);
+ if (!argv[0])
return 0;
- argv[0] = hook_name;
argv[1] = NULL;
memset(&proc, 0, sizeof(proc));
@@ -231,15 +275,13 @@ 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)
@@ -247,17 +289,61 @@ 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";
const char *argv[5];
struct child_process proc;
int code;
- if (access(update_hook, X_OK) < 0)
+ argv[0] = find_hook("update");
+ if (!argv[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);
@@ -333,17 +419,22 @@ 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;
@@ -371,7 +462,7 @@ 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;
@@ -393,7 +484,6 @@ static const char *update(struct command *cmd)
!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);
@@ -406,12 +496,7 @@ static const char *update(struct command *cmd)
}
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) {
+ if (!in_merge_bases(old_commit, new_commit)) {
rp_error("denying non-fast-forward %s"
" (you should pull first)", name);
return "non-fast-forward";
@@ -424,17 +509,22 @@ 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";
@@ -446,28 +536,29 @@ static const char *update(struct command *cmd)
}
}
-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;
+ char *hook;
+ hook = find_hook("post-update");
for (argc = 0, cmd = commands; cmd; cmd = cmd->next) {
- if (cmd->error_string)
+ if (cmd->error_string || cmd->did_not_exist)
continue;
argc++;
}
- if (!argc || access(update_post_hook, X_OK) < 0)
+ if (!argc || !hook)
return;
+
argv = xmalloc(sizeof(*argv) * (2 + argc));
- argv[0] = update_post_hook;
+ argv[0] = hook;
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);
@@ -491,17 +582,29 @@ 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_unsafe(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;
@@ -540,12 +643,70 @@ static void check_aliased_updates(struct command *commands)
}
sort_string_list(&ref_list);
- for (cmd = commands; cmd; cmd = cmd->next)
- check_aliased_update(cmd, &ref_list);
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (!cmd->error_string)
+ check_aliased_update(cmd, &ref_list);
+ }
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 reject_updates_to_hidden(struct command *commands)
+{
+ struct command *cmd;
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (cmd->error_string || !ref_is_hidden(cmd->ref_name))
+ continue;
+ if (is_null_sha1(cmd->new_sha1))
+ cmd->error_string = "deny deleting a hidden ref";
+ else
+ cmd->error_string = "deny updating a hidden ref";
+ }
+}
+
static void execute_commands(struct command *commands, const char *unpacker_error)
{
struct command *cmd;
@@ -553,23 +714,39 @@ static void execute_commands(struct command *commands, const char *unpacker_erro
if (unpacker_error) {
for (cmd = commands; cmd; cmd = cmd->next)
- cmd->error_string = "n/a (unpacker error)";
+ cmd->error_string = "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";
+ cmd = commands;
+ if (check_everything_connected(iterate_receive_command_list,
+ 0, &cmd))
+ set_connectivity_errors(commands);
+
+ reject_updates_to_hidden(commands);
+
+ if (run_receive_hook(commands, "pre-receive", 0)) {
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (!cmd->error_string)
+ cmd->error_string = "pre-receive hook declined";
+ }
return;
}
check_aliased_updates(commands);
- head_name = resolve_ref("HEAD", sha1, 0, NULL);
+ free(head_name_to_free);
+ head_name = head_name_to_free = resolve_refdup("HEAD", sha1, 0, NULL);
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (cmd->error_string)
+ continue;
- for (cmd = commands; cmd; cmd = cmd->next)
- if (!cmd->skip_update)
- cmd->error_string = update(cmd);
+ if (cmd->skip_update)
+ continue;
+
+ cmd->error_string = update(cmd);
+ }
}
static struct command *read_head_info(void)
@@ -599,10 +776,13 @@ static struct command *read_head_info(void)
refname = line + 82;
reflen = strlen(refname);
if (reflen + 82 < len) {
- if (strstr(refname + reflen + 1, "report-status"))
+ const char *feature_list = refname + reflen + 1;
+ if (parse_feature_request(feature_list, "report-status"))
report_status = 1;
- if (strstr(refname + reflen + 1, "side-band-64k"))
+ if (parse_feature_request(feature_list, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
+ if (parse_feature_request(feature_list, "quiet"))
+ quiet = 1;
}
cmd = xcalloc(1, sizeof(struct command) + len - 80);
hashcpy(cmd->old_sha1, old_sha1);
@@ -636,11 +816,16 @@ static const char *parse_pack_header(struct pack_header *hdr)
static const char *pack_lockfile;
-static const char *unpack(void)
+static const char *unpack(int err_fd)
{
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)
@@ -651,13 +836,21 @@ static const char *unpack(void)
if (ntohl(hdr.hdr_entries) < unpack_limit) {
int code, i = 0;
- const char *unpacker[4];
+ struct child_process child;
+ const char *unpacker[5];
unpacker[i++] = "unpack-objects";
- if (receive_fsck_objects)
+ if (quiet)
+ unpacker[i++] = "-q";
+ if (fsck_objects)
unpacker[i++] = "--strict";
unpacker[i++] = hdr_arg;
unpacker[i++] = NULL;
- code = run_command_v_opt(unpacker, RUN_GIT_CMD);
+ memset(&child, 0, sizeof(child));
+ child.argv = unpacker;
+ child.no_stdout = 1;
+ child.err = err_fd;
+ child.git_cmd = 1;
+ code = run_command(&child);
if (!code)
return NULL;
return "unpack-objects abnormal exit";
@@ -673,7 +866,7 @@ 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;
@@ -682,6 +875,7 @@ static const char *unpack(void)
memset(&ip, 0, sizeof(ip));
ip.argv = keeper;
ip.out = -1;
+ ip.err = err_fd;
ip.git_cmd = 1;
status = start_command(&ip);
if (status) {
@@ -698,6 +892,26 @@ static const char *unpack(void)
}
}
+static const char *unpack_with_sideband(void)
+{
+ struct async muxer;
+ const char *ret;
+
+ if (!use_sideband)
+ return unpack(0);
+
+ memset(&muxer, 0, sizeof(muxer));
+ muxer.proc = copy_to_sideband;
+ muxer.in = -1;
+ if (start_async(&muxer))
+ return NULL;
+
+ ret = unpack(muxer.in);
+
+ finish_async(&muxer);
+ return ret;
+}
+
static void report(struct command *commands, const char *unpack_status)
{
struct command *cmd;
@@ -732,25 +946,6 @@ static int delete_only(struct command *commands)
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;
@@ -766,6 +961,11 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
const char *arg = *argv++;
if (*arg == '-') {
+ if (!strcmp(arg, "--quiet")) {
+ quiet = 1;
+ continue;
+ }
+
if (!strcmp(arg, "--advertise-refs")) {
advertise_refs = 1;
continue;
@@ -800,12 +1000,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
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;
@@ -814,19 +1009,20 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
const char *unpack_status = NULL;
if (!delete_only(commands))
- unpack_status = unpack();
+ unpack_status = unpack_with_sideband();
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_receive_hook(commands, "post-receive", 1);
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);
+ int opt = RUN_GIT_CMD | RUN_COMMAND_STDOUT_TO_STDERR;
+ run_command_v_opt(argv_gc_auto, opt);
}
if (auto_update_server_info)
update_server_info(0);
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-08 13:31:36 +0000