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receive-pack.c
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2601 lines (2254 loc) · 65.6 KB
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#include "builtin.h"
#include "repository.h"
#include "config.h"
#include "lockfile.h"
#include "pack.h"
#include "refs.h"
#include "pkt-line.h"
#include "sideband.h"
#include "run-command.h"
#include "hook.h"
#include "exec-cmd.h"
#include "commit.h"
#include "object.h"
#include "remote.h"
#include "connect.h"
#include "string-list.h"
#include "oid-array.h"
#include "connected.h"
#include "strvec.h"
#include "version.h"
#include "tag.h"
#include "gpg-interface.h"
#include "sigchain.h"
#include "fsck.h"
#include "tmp-objdir.h"
#include "oidset.h"
#include "packfile.h"
#include "object-store.h"
#include "protocol.h"
#include "commit-reach.h"
#include "worktree.h"
#include "shallow.h"
static const char * const receive_pack_usage[] = {
N_("git receive-pack <git-dir>"),
NULL
};
enum deny_action {
DENY_UNCONFIGURED,
DENY_IGNORE,
DENY_WARN,
DENY_REFUSE,
DENY_UPDATE_INSTEAD
};
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 = -1;
static int transfer_fsck_objects = -1;
static struct strbuf fsck_msg_types = STRBUF_INIT;
static int receive_unpack_limit = -1;
static int transfer_unpack_limit = -1;
static int advertise_atomic_push = 1;
static int advertise_push_options;
static int advertise_sid;
static int unpack_limit = 100;
static off_t max_input_size;
static int report_status;
static int report_status_v2;
static int use_sideband;
static int use_atomic;
static int use_push_options;
static int quiet;
static int prefer_ofs_delta = 1;
static int auto_update_server_info;
static int auto_gc = 1;
static int reject_thin;
static int stateless_rpc;
static const char *service_dir;
static const char *head_name;
static void *head_name_to_free;
static int sent_capabilities;
static int shallow_update;
static const char *alt_shallow_file;
static struct strbuf push_cert = STRBUF_INIT;
static struct object_id push_cert_oid;
static struct signature_check sigcheck;
static const char *push_cert_nonce;
static const char *cert_nonce_seed;
static const char *NONCE_UNSOLICITED = "UNSOLICITED";
static const char *NONCE_BAD = "BAD";
static const char *NONCE_MISSING = "MISSING";
static const char *NONCE_OK = "OK";
static const char *NONCE_SLOP = "SLOP";
static const char *nonce_status;
static long nonce_stamp_slop;
static timestamp_t nonce_stamp_slop_limit;
static struct ref_transaction *transaction;
static enum {
KEEPALIVE_NEVER = 0,
KEEPALIVE_AFTER_NUL,
KEEPALIVE_ALWAYS
} use_keepalive;
static int keepalive_in_sec = 5;
static struct tmp_objdir *tmp_objdir;
static struct proc_receive_ref {
unsigned int want_add:1,
want_delete:1,
want_modify:1,
negative_ref:1;
char *ref_prefix;
struct proc_receive_ref *next;
} *proc_receive_ref;
static void proc_receive_ref_append(const char *prefix);
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 (!strcasecmp(value, "updateinstead"))
return DENY_UPDATE_INSTEAD;
}
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)
{
int status = parse_hide_refs_config(var, value, "receive");
if (status)
return status;
status = git_gpg_config(var, value, NULL);
if (status)
return status;
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.fsck.skiplist") == 0) {
const char *path;
if (git_config_pathname(&path, var, value))
return 1;
strbuf_addf(&fsck_msg_types, "%cskiplist=%s",
fsck_msg_types.len ? ',' : '=', path);
free((char *)path);
return 0;
}
if (skip_prefix(var, "receive.fsck.", &var)) {
if (is_valid_msg_type(var, value))
strbuf_addf(&fsck_msg_types, "%c%s=%s",
fsck_msg_types.len ? ',' : '=', var, value);
else
warning("skipping unknown msg id '%s'", var);
return 0;
}
if (strcmp(var, "receive.fsckobjects") == 0) {
receive_fsck_objects = git_config_bool(var, value);
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;
}
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;
}
if (strcmp(var, "receive.shallowupdate") == 0) {
shallow_update = git_config_bool(var, value);
return 0;
}
if (strcmp(var, "receive.certnonceseed") == 0)
return git_config_string(&cert_nonce_seed, var, value);
if (strcmp(var, "receive.certnonceslop") == 0) {
nonce_stamp_slop_limit = git_config_ulong(var, value);
return 0;
}
if (strcmp(var, "receive.advertiseatomic") == 0) {
advertise_atomic_push = git_config_bool(var, value);
return 0;
}
if (strcmp(var, "receive.advertisepushoptions") == 0) {
advertise_push_options = git_config_bool(var, value);
return 0;
}
if (strcmp(var, "receive.keepalive") == 0) {
keepalive_in_sec = git_config_int(var, value);
return 0;
}
if (strcmp(var, "receive.maxinputsize") == 0) {
max_input_size = git_config_int64(var, value);
return 0;
}
if (strcmp(var, "receive.procreceiverefs") == 0) {
if (!value)
return config_error_nonbool(var);
proc_receive_ref_append(value);
return 0;
}
if (strcmp(var, "transfer.advertisesid") == 0) {
advertise_sid = git_config_bool(var, value);
return 0;
}
return git_default_config(var, value, cb);
}
static void show_ref(const char *path, const struct object_id *oid)
{
if (sent_capabilities) {
packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), path);
} else {
struct strbuf cap = STRBUF_INIT;
strbuf_addstr(&cap,
"report-status report-status-v2 delete-refs side-band-64k quiet");
if (advertise_atomic_push)
strbuf_addstr(&cap, " atomic");
if (prefer_ofs_delta)
strbuf_addstr(&cap, " ofs-delta");
if (push_cert_nonce)
strbuf_addf(&cap, " push-cert=%s", push_cert_nonce);
if (advertise_push_options)
strbuf_addstr(&cap, " push-options");
if (advertise_sid)
strbuf_addf(&cap, " session-id=%s", trace2_session_id());
strbuf_addf(&cap, " object-format=%s", the_hash_algo->name);
strbuf_addf(&cap, " agent=%s", git_user_agent_sanitized());
packet_write_fmt(1, "%s %s%c%s\n",
oid_to_hex(oid), path, 0, cap.buf);
strbuf_release(&cap);
sent_capabilities = 1;
}
}
static int show_ref_cb(const char *path_full, const struct object_id *oid,
int flag, void *data)
{
struct oidset *seen = data;
const char *path = strip_namespace(path_full);
if (ref_is_hidden(path, path_full))
return 0;
/*
* 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.
*/
if (!path) {
if (oidset_insert(seen, oid))
return 0;
path = ".have";
} else {
oidset_insert(seen, oid);
}
show_ref(path, oid);
return 0;
}
static void show_one_alternate_ref(const struct object_id *oid,
void *data)
{
struct oidset *seen = data;
if (oidset_insert(seen, oid))
return;
show_ref(".have", oid);
}
static void write_head_info(void)
{
static struct oidset seen = OIDSET_INIT;
for_each_ref(show_ref_cb, &seen);
for_each_alternate_ref(show_one_alternate_ref, &seen);
oidset_clear(&seen);
if (!sent_capabilities)
show_ref("capabilities^{}", null_oid());
advertise_shallow_grafts(1);
/* EOF */
packet_flush(1);
}
#define RUN_PROC_RECEIVE_SCHEDULED 1
#define RUN_PROC_RECEIVE_RETURNED 2
struct command {
struct command *next;
const char *error_string;
struct ref_push_report *report;
unsigned int skip_update:1,
did_not_exist:1,
run_proc_receive:2;
int index;
struct object_id old_oid;
struct object_id new_oid;
char ref_name[FLEX_ARRAY]; /* more */
};
static void proc_receive_ref_append(const char *prefix)
{
struct proc_receive_ref *ref_pattern;
char *p;
int len;
CALLOC_ARRAY(ref_pattern, 1);
p = strchr(prefix, ':');
if (p) {
while (prefix < p) {
if (*prefix == 'a')
ref_pattern->want_add = 1;
else if (*prefix == 'd')
ref_pattern->want_delete = 1;
else if (*prefix == 'm')
ref_pattern->want_modify = 1;
else if (*prefix == '!')
ref_pattern->negative_ref = 1;
prefix++;
}
prefix++;
} else {
ref_pattern->want_add = 1;
ref_pattern->want_delete = 1;
ref_pattern->want_modify = 1;
}
len = strlen(prefix);
while (len && prefix[len - 1] == '/')
len--;
ref_pattern->ref_prefix = xmemdupz(prefix, len);
if (!proc_receive_ref) {
proc_receive_ref = ref_pattern;
} else {
struct proc_receive_ref *end;
end = proc_receive_ref;
while (end->next)
end = end->next;
end->next = ref_pattern;
}
}
static int proc_receive_ref_matches(struct command *cmd)
{
struct proc_receive_ref *p;
if (!proc_receive_ref)
return 0;
for (p = proc_receive_ref; p; p = p->next) {
const char *match = p->ref_prefix;
const char *remains;
if (!p->want_add && is_null_oid(&cmd->old_oid))
continue;
else if (!p->want_delete && is_null_oid(&cmd->new_oid))
continue;
else if (!p->want_modify &&
!is_null_oid(&cmd->old_oid) &&
!is_null_oid(&cmd->new_oid))
continue;
if (skip_prefix(cmd->ref_name, match, &remains) &&
(!*remains || *remains == '/')) {
if (!p->negative_ref)
return 1;
} else if (p->negative_ref) {
return 1;
}
}
return 0;
}
static void report_message(const char *prefix, const char *err, va_list params)
{
int sz;
char msg[4096];
sz = xsnprintf(msg, sizeof(msg), "%s", prefix);
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);
}
__attribute__((format (printf, 1, 2)))
static void rp_warning(const char *err, ...)
{
va_list params;
va_start(params, err);
report_message("warning: ", err, params);
va_end(params);
}
__attribute__((format (printf, 1, 2)))
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];
int keepalive_active = 0;
if (keepalive_in_sec <= 0)
use_keepalive = KEEPALIVE_NEVER;
if (use_keepalive == KEEPALIVE_ALWAYS)
keepalive_active = 1;
while (1) {
ssize_t sz;
if (keepalive_active) {
struct pollfd pfd;
int ret;
pfd.fd = in;
pfd.events = POLLIN;
ret = poll(&pfd, 1, 1000 * keepalive_in_sec);
if (ret < 0) {
if (errno == EINTR)
continue;
else
break;
} else if (ret == 0) {
/* no data; send a keepalive packet */
static const char buf[] = "0005\1";
write_or_die(1, buf, sizeof(buf) - 1);
continue;
} /* else there is actual data to read */
}
sz = xread(in, data, sizeof(data));
if (sz <= 0)
break;
if (use_keepalive == KEEPALIVE_AFTER_NUL && !keepalive_active) {
const char *p = memchr(data, '\0', sz);
if (p) {
/*
* The NUL tells us to start sending keepalives. Make
* sure we send any other data we read along
* with it.
*/
keepalive_active = 1;
send_sideband(1, 2, data, p - data, use_sideband);
send_sideband(1, 2, p + 1, sz - (p - data + 1), use_sideband);
continue;
}
}
/*
* Either we're not looking for a NUL signal, or we didn't see
* it yet; just pass along the data.
*/
send_sideband(1, 2, data, sz, use_sideband);
}
close(in);
return 0;
}
static void hmac_hash(unsigned char *out,
const char *key_in, size_t key_len,
const char *text, size_t text_len)
{
unsigned char key[GIT_MAX_BLKSZ];
unsigned char k_ipad[GIT_MAX_BLKSZ];
unsigned char k_opad[GIT_MAX_BLKSZ];
int i;
git_hash_ctx ctx;
/* RFC 2104 2. (1) */
memset(key, '\0', GIT_MAX_BLKSZ);
if (the_hash_algo->blksz < key_len) {
the_hash_algo->init_fn(&ctx);
the_hash_algo->update_fn(&ctx, key_in, key_len);
the_hash_algo->final_fn(key, &ctx);
} else {
memcpy(key, key_in, key_len);
}
/* RFC 2104 2. (2) & (5) */
for (i = 0; i < sizeof(key); i++) {
k_ipad[i] = key[i] ^ 0x36;
k_opad[i] = key[i] ^ 0x5c;
}
/* RFC 2104 2. (3) & (4) */
the_hash_algo->init_fn(&ctx);
the_hash_algo->update_fn(&ctx, k_ipad, sizeof(k_ipad));
the_hash_algo->update_fn(&ctx, text, text_len);
the_hash_algo->final_fn(out, &ctx);
/* RFC 2104 2. (6) & (7) */
the_hash_algo->init_fn(&ctx);
the_hash_algo->update_fn(&ctx, k_opad, sizeof(k_opad));
the_hash_algo->update_fn(&ctx, out, the_hash_algo->rawsz);
the_hash_algo->final_fn(out, &ctx);
}
static char *prepare_push_cert_nonce(const char *path, timestamp_t stamp)
{
struct strbuf buf = STRBUF_INIT;
unsigned char hash[GIT_MAX_RAWSZ];
strbuf_addf(&buf, "%s:%"PRItime, path, stamp);
hmac_hash(hash, buf.buf, buf.len, cert_nonce_seed, strlen(cert_nonce_seed));
strbuf_release(&buf);
/* RFC 2104 5. HMAC-SHA1 or HMAC-SHA256 */
strbuf_addf(&buf, "%"PRItime"-%.*s", stamp, (int)the_hash_algo->hexsz, hash_to_hex(hash));
return strbuf_detach(&buf, NULL);
}
static char *find_header(const char *msg, size_t len, const char *key,
const char **next_line)
{
size_t out_len;
const char *val = find_header_mem(msg, len, key, &out_len);
if (!val)
return NULL;
if (next_line)
*next_line = val + out_len + 1;
return xmemdupz(val, out_len);
}
/*
* Return zero if a and b are equal up to n bytes and nonzero if they are not.
* This operation is guaranteed to run in constant time to avoid leaking data.
*/
static int constant_memequal(const char *a, const char *b, size_t n)
{
int res = 0;
size_t i;
for (i = 0; i < n; i++)
res |= a[i] ^ b[i];
return res;
}
static const char *check_nonce(const char *buf, size_t len)
{
char *nonce = find_header(buf, len, "nonce", NULL);
timestamp_t stamp, ostamp;
char *bohmac, *expect = NULL;
const char *retval = NONCE_BAD;
size_t noncelen;
if (!nonce) {
retval = NONCE_MISSING;
goto leave;
} else if (!push_cert_nonce) {
retval = NONCE_UNSOLICITED;
goto leave;
} else if (!strcmp(push_cert_nonce, nonce)) {
retval = NONCE_OK;
goto leave;
}
if (!stateless_rpc) {
/* returned nonce MUST match what we gave out earlier */
retval = NONCE_BAD;
goto leave;
}
/*
* In stateless mode, we may be receiving a nonce issued by
* another instance of the server that serving the same
* repository, and the timestamps may not match, but the
* nonce-seed and dir should match, so we can recompute and
* report the time slop.
*
* In addition, when a nonce issued by another instance has
* timestamp within receive.certnonceslop seconds, we pretend
* as if we issued that nonce when reporting to the hook.
*/
/* nonce is concat(<seconds-since-epoch>, "-", <hmac>) */
if (*nonce <= '0' || '9' < *nonce) {
retval = NONCE_BAD;
goto leave;
}
stamp = parse_timestamp(nonce, &bohmac, 10);
if (bohmac == nonce || bohmac[0] != '-') {
retval = NONCE_BAD;
goto leave;
}
noncelen = strlen(nonce);
expect = prepare_push_cert_nonce(service_dir, stamp);
if (noncelen != strlen(expect)) {
/* This is not even the right size. */
retval = NONCE_BAD;
goto leave;
}
if (constant_memequal(expect, nonce, noncelen)) {
/* Not what we would have signed earlier */
retval = NONCE_BAD;
goto leave;
}
/*
* By how many seconds is this nonce stale? Negative value
* would mean it was issued by another server with its clock
* skewed in the future.
*/
ostamp = parse_timestamp(push_cert_nonce, NULL, 10);
nonce_stamp_slop = (long)ostamp - (long)stamp;
if (nonce_stamp_slop_limit &&
labs(nonce_stamp_slop) <= nonce_stamp_slop_limit) {
/*
* Pretend as if the received nonce (which passes the
* HMAC check, so it is not a forged by third-party)
* is what we issued.
*/
free((void *)push_cert_nonce);
push_cert_nonce = xstrdup(nonce);
retval = NONCE_OK;
} else {
retval = NONCE_SLOP;
}
leave:
free(nonce);
free(expect);
return retval;
}
/*
* Return 1 if there is no push_cert or if the push options in push_cert are
* the same as those in the argument; 0 otherwise.
*/
static int check_cert_push_options(const struct string_list *push_options)
{
const char *buf = push_cert.buf;
int len = push_cert.len;
char *option;
const char *next_line;
int options_seen = 0;
int retval = 1;
if (!len)
return 1;
while ((option = find_header(buf, len, "push-option", &next_line))) {
len -= (next_line - buf);
buf = next_line;
options_seen++;
if (options_seen > push_options->nr
|| strcmp(option,
push_options->items[options_seen - 1].string)) {
retval = 0;
goto leave;
}
free(option);
}
if (options_seen != push_options->nr)
retval = 0;
leave:
free(option);
return retval;
}
static void prepare_push_cert_sha1(struct child_process *proc)
{
static int already_done;
if (!push_cert.len)
return;
if (!already_done) {
int bogs /* beginning_of_gpg_sig */;
already_done = 1;
if (write_object_file(push_cert.buf, push_cert.len, OBJ_BLOB,
&push_cert_oid))
oidclr(&push_cert_oid);
memset(&sigcheck, '\0', sizeof(sigcheck));
bogs = parse_signed_buffer(push_cert.buf, push_cert.len);
sigcheck.payload = xmemdupz(push_cert.buf, bogs);
sigcheck.payload_len = bogs;
check_signature(&sigcheck, push_cert.buf + bogs,
push_cert.len - bogs);
nonce_status = check_nonce(push_cert.buf, bogs);
}
if (!is_null_oid(&push_cert_oid)) {
strvec_pushf(&proc->env_array, "GIT_PUSH_CERT=%s",
oid_to_hex(&push_cert_oid));
strvec_pushf(&proc->env_array, "GIT_PUSH_CERT_SIGNER=%s",
sigcheck.signer ? sigcheck.signer : "");
strvec_pushf(&proc->env_array, "GIT_PUSH_CERT_KEY=%s",
sigcheck.key ? sigcheck.key : "");
strvec_pushf(&proc->env_array, "GIT_PUSH_CERT_STATUS=%c",
sigcheck.result);
if (push_cert_nonce) {
strvec_pushf(&proc->env_array,
"GIT_PUSH_CERT_NONCE=%s",
push_cert_nonce);
strvec_pushf(&proc->env_array,
"GIT_PUSH_CERT_NONCE_STATUS=%s",
nonce_status);
if (nonce_status == NONCE_SLOP)
strvec_pushf(&proc->env_array,
"GIT_PUSH_CERT_NONCE_SLOP=%ld",
nonce_stamp_slop);
}
}
}
struct receive_hook_feed_state {
struct command *cmd;
struct ref_push_report *report;
int skip_broken;
struct strbuf buf;
const struct string_list *push_options;
};
typedef int (*feed_fn)(void *, const char **, size_t *);
static int run_and_feed_hook(const char *hook_name, feed_fn feed,
struct receive_hook_feed_state *feed_state)
{
struct child_process proc = CHILD_PROCESS_INIT;
struct async muxer;
int code;
const char *hook_path = find_hook(hook_name);
if (!hook_path)
return 0;
strvec_push(&proc.args, hook_path);
proc.in = -1;
proc.stdout_to_stderr = 1;
proc.trace2_hook_name = hook_name;
if (feed_state->push_options) {
size_t i;
for (i = 0; i < feed_state->push_options->nr; i++)
strvec_pushf(&proc.env_array,
"GIT_PUSH_OPTION_%"PRIuMAX"=%s",
(uintmax_t)i,
feed_state->push_options->items[i].string);
strvec_pushf(&proc.env_array, "GIT_PUSH_OPTION_COUNT=%"PRIuMAX"",
(uintmax_t)feed_state->push_options->nr);
} else
strvec_pushf(&proc.env_array, "GIT_PUSH_OPTION_COUNT");
if (tmp_objdir)
strvec_pushv(&proc.env_array, tmp_objdir_env(tmp_objdir));
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;
}
prepare_push_cert_sha1(&proc);
code = start_command(&proc);
if (code) {
if (use_sideband)
finish_async(&muxer);
return code;
}
sigchain_push(SIGPIPE, SIG_IGN);
while (1) {
const char *buf;
size_t n;
if (feed(feed_state, &buf, &n))
break;
if (write_in_full(proc.in, buf, n) < 0)
break;
}
close(proc.in);
if (use_sideband)
finish_async(&muxer);
sigchain_pop(SIGPIPE);
return finish_command(&proc);
}
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 */
if (!bufp)
return 0; /* OK, can feed something. */
strbuf_reset(&state->buf);
if (!state->report)
state->report = cmd->report;
if (state->report) {
struct object_id *old_oid;
struct object_id *new_oid;
const char *ref_name;
old_oid = state->report->old_oid ? state->report->old_oid : &cmd->old_oid;
new_oid = state->report->new_oid ? state->report->new_oid : &cmd->new_oid;
ref_name = state->report->ref_name ? state->report->ref_name : cmd->ref_name;
strbuf_addf(&state->buf, "%s %s %s\n",
oid_to_hex(old_oid), oid_to_hex(new_oid),
ref_name);
state->report = state->report->next;
if (!state->report)
state->cmd = cmd->next;
} else {
strbuf_addf(&state->buf, "%s %s %s\n",
oid_to_hex(&cmd->old_oid), oid_to_hex(&cmd->new_oid),
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,
const struct string_list *push_options)
{
struct receive_hook_feed_state state;
int status;
strbuf_init(&state.buf, 0);
state.cmd = commands;
state.skip_broken = skip_broken;
state.report = NULL;
if (feed_receive_hook(&state, NULL, NULL))
return 0;
state.cmd = commands;
state.push_options = push_options;
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)
{
struct child_process proc = CHILD_PROCESS_INIT;
int code;
const char *hook_path = find_hook("update");
if (!hook_path)
return 0;
strvec_push(&proc.args, hook_path);
strvec_push(&proc.args, cmd->ref_name);
strvec_push(&proc.args, oid_to_hex(&cmd->old_oid));
strvec_push(&proc.args, oid_to_hex(&cmd->new_oid));
proc.no_stdin = 1;
proc.stdout_to_stderr = 1;
proc.err = use_sideband ? -1 : 0;
proc.trace2_hook_name = "update";
code = start_command(&proc);
if (code)
return code;
if (use_sideband)
copy_to_sideband(proc.err, -1, NULL);
return finish_command(&proc);
}
static struct command *find_command_by_refname(struct command *list,
const char *refname)
{
for (; list; list = list->next)
if (!strcmp(list->ref_name, refname))
return list;
return NULL;
}
static int read_proc_receive_report(struct packet_reader *reader,
struct command *commands,
struct strbuf *errmsg)
{
struct command *cmd;
struct command *hint = NULL;
struct ref_push_report *report = NULL;
int new_report = 0;
int code = 0;
int once = 0;
int response = 0;
for (;;) {
struct object_id old_oid, new_oid;
const char *head;
const char *refname;
char *p;
enum packet_read_status status;
status = packet_reader_read(reader);
if (status != PACKET_READ_NORMAL) {
/* Check whether proc-receive exited abnormally */
if (status == PACKET_READ_EOF && !response) {
strbuf_addstr(errmsg, "proc-receive exited abnormally");
return -1;
}
break;
}
response++;
head = reader->line;
p = strchr(head, ' ');
if (!p) {
strbuf_addf(errmsg, "proc-receive reported incomplete status line: '%s'\n", head);