mirror of
https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
![brian m. carlson](/assets/img/avatar_default.png)
Convert all instances of get_object_hash to use an appropriate reference to the hash member of the oid member of struct object. This provides no functional change, as it is essentially a macro substitution. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
1060 lines
27 KiB
C
1060 lines
27 KiB
C
#include "cache.h"
|
|
#include "lockfile.h"
|
|
#include "refs.h"
|
|
#include "pkt-line.h"
|
|
#include "commit.h"
|
|
#include "tag.h"
|
|
#include "exec_cmd.h"
|
|
#include "pack.h"
|
|
#include "sideband.h"
|
|
#include "fetch-pack.h"
|
|
#include "remote.h"
|
|
#include "run-command.h"
|
|
#include "connect.h"
|
|
#include "transport.h"
|
|
#include "version.h"
|
|
#include "prio-queue.h"
|
|
#include "sha1-array.h"
|
|
|
|
static int transfer_unpack_limit = -1;
|
|
static int fetch_unpack_limit = -1;
|
|
static int unpack_limit = 100;
|
|
static int prefer_ofs_delta = 1;
|
|
static int no_done;
|
|
static int fetch_fsck_objects = -1;
|
|
static int transfer_fsck_objects = -1;
|
|
static int agent_supported;
|
|
static struct lock_file shallow_lock;
|
|
static const char *alternate_shallow_file;
|
|
|
|
/* Remember to update object flag allocation in object.h */
|
|
#define COMPLETE (1U << 0)
|
|
#define COMMON (1U << 1)
|
|
#define COMMON_REF (1U << 2)
|
|
#define SEEN (1U << 3)
|
|
#define POPPED (1U << 4)
|
|
|
|
static int marked;
|
|
|
|
/*
|
|
* After sending this many "have"s if we do not get any new ACK , we
|
|
* give up traversing our history.
|
|
*/
|
|
#define MAX_IN_VAIN 256
|
|
|
|
static struct prio_queue rev_list = { compare_commits_by_commit_date };
|
|
static int non_common_revs, multi_ack, use_sideband;
|
|
/* Allow specifying sha1 if it is a ref tip. */
|
|
#define ALLOW_TIP_SHA1 01
|
|
/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
|
|
#define ALLOW_REACHABLE_SHA1 02
|
|
static unsigned int allow_unadvertised_object_request;
|
|
|
|
static void rev_list_push(struct commit *commit, int mark)
|
|
{
|
|
if (!(commit->object.flags & mark)) {
|
|
commit->object.flags |= mark;
|
|
|
|
if (parse_commit(commit))
|
|
return;
|
|
|
|
prio_queue_put(&rev_list, commit);
|
|
|
|
if (!(commit->object.flags & COMMON))
|
|
non_common_revs++;
|
|
}
|
|
}
|
|
|
|
static int rev_list_insert_ref(const char *refname, const unsigned char *sha1)
|
|
{
|
|
struct object *o = deref_tag(parse_object(sha1), refname, 0);
|
|
|
|
if (o && o->type == OBJ_COMMIT)
|
|
rev_list_push((struct commit *)o, SEEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
|
|
int flag, void *cb_data)
|
|
{
|
|
return rev_list_insert_ref(refname, oid->hash);
|
|
}
|
|
|
|
static int clear_marks(const char *refname, const struct object_id *oid,
|
|
int flag, void *cb_data)
|
|
{
|
|
struct object *o = deref_tag(parse_object(oid->hash), refname, 0);
|
|
|
|
if (o && o->type == OBJ_COMMIT)
|
|
clear_commit_marks((struct commit *)o,
|
|
COMMON | COMMON_REF | SEEN | POPPED);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
This function marks a rev and its ancestors as common.
|
|
In some cases, it is desirable to mark only the ancestors (for example
|
|
when only the server does not yet know that they are common).
|
|
*/
|
|
|
|
static void mark_common(struct commit *commit,
|
|
int ancestors_only, int dont_parse)
|
|
{
|
|
if (commit != NULL && !(commit->object.flags & COMMON)) {
|
|
struct object *o = (struct object *)commit;
|
|
|
|
if (!ancestors_only)
|
|
o->flags |= COMMON;
|
|
|
|
if (!(o->flags & SEEN))
|
|
rev_list_push(commit, SEEN);
|
|
else {
|
|
struct commit_list *parents;
|
|
|
|
if (!ancestors_only && !(o->flags & POPPED))
|
|
non_common_revs--;
|
|
if (!o->parsed && !dont_parse)
|
|
if (parse_commit(commit))
|
|
return;
|
|
|
|
for (parents = commit->parents;
|
|
parents;
|
|
parents = parents->next)
|
|
mark_common(parents->item, 0, dont_parse);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
Get the next rev to send, ignoring the common.
|
|
*/
|
|
|
|
static const unsigned char *get_rev(void)
|
|
{
|
|
struct commit *commit = NULL;
|
|
|
|
while (commit == NULL) {
|
|
unsigned int mark;
|
|
struct commit_list *parents;
|
|
|
|
if (rev_list.nr == 0 || non_common_revs == 0)
|
|
return NULL;
|
|
|
|
commit = prio_queue_get(&rev_list);
|
|
parse_commit(commit);
|
|
parents = commit->parents;
|
|
|
|
commit->object.flags |= POPPED;
|
|
if (!(commit->object.flags & COMMON))
|
|
non_common_revs--;
|
|
|
|
if (commit->object.flags & COMMON) {
|
|
/* do not send "have", and ignore ancestors */
|
|
commit = NULL;
|
|
mark = COMMON | SEEN;
|
|
} else if (commit->object.flags & COMMON_REF)
|
|
/* send "have", and ignore ancestors */
|
|
mark = COMMON | SEEN;
|
|
else
|
|
/* send "have", also for its ancestors */
|
|
mark = SEEN;
|
|
|
|
while (parents) {
|
|
if (!(parents->item->object.flags & SEEN))
|
|
rev_list_push(parents->item, mark);
|
|
if (mark & COMMON)
|
|
mark_common(parents->item, 1, 0);
|
|
parents = parents->next;
|
|
}
|
|
}
|
|
|
|
return commit->object.oid.hash;
|
|
}
|
|
|
|
enum ack_type {
|
|
NAK = 0,
|
|
ACK,
|
|
ACK_continue,
|
|
ACK_common,
|
|
ACK_ready
|
|
};
|
|
|
|
static void consume_shallow_list(struct fetch_pack_args *args, int fd)
|
|
{
|
|
if (args->stateless_rpc && args->depth > 0) {
|
|
/* If we sent a depth we will get back "duplicate"
|
|
* shallow and unshallow commands every time there
|
|
* is a block of have lines exchanged.
|
|
*/
|
|
char *line;
|
|
while ((line = packet_read_line(fd, NULL))) {
|
|
if (starts_with(line, "shallow "))
|
|
continue;
|
|
if (starts_with(line, "unshallow "))
|
|
continue;
|
|
die("git fetch-pack: expected shallow list");
|
|
}
|
|
}
|
|
}
|
|
|
|
static enum ack_type get_ack(int fd, unsigned char *result_sha1)
|
|
{
|
|
int len;
|
|
char *line = packet_read_line(fd, &len);
|
|
const char *arg;
|
|
|
|
if (!len)
|
|
die("git fetch-pack: expected ACK/NAK, got EOF");
|
|
if (!strcmp(line, "NAK"))
|
|
return NAK;
|
|
if (skip_prefix(line, "ACK ", &arg)) {
|
|
if (!get_sha1_hex(arg, result_sha1)) {
|
|
arg += 40;
|
|
len -= arg - line;
|
|
if (len < 1)
|
|
return ACK;
|
|
if (strstr(arg, "continue"))
|
|
return ACK_continue;
|
|
if (strstr(arg, "common"))
|
|
return ACK_common;
|
|
if (strstr(arg, "ready"))
|
|
return ACK_ready;
|
|
return ACK;
|
|
}
|
|
}
|
|
die("git fetch_pack: expected ACK/NAK, got '%s'", line);
|
|
}
|
|
|
|
static void send_request(struct fetch_pack_args *args,
|
|
int fd, struct strbuf *buf)
|
|
{
|
|
if (args->stateless_rpc) {
|
|
send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
|
|
packet_flush(fd);
|
|
} else
|
|
write_or_die(fd, buf->buf, buf->len);
|
|
}
|
|
|
|
static void insert_one_alternate_ref(const struct ref *ref, void *unused)
|
|
{
|
|
rev_list_insert_ref(NULL, ref->old_oid.hash);
|
|
}
|
|
|
|
#define INITIAL_FLUSH 16
|
|
#define PIPESAFE_FLUSH 32
|
|
#define LARGE_FLUSH 1024
|
|
|
|
static int next_flush(struct fetch_pack_args *args, int count)
|
|
{
|
|
int flush_limit = args->stateless_rpc ? LARGE_FLUSH : PIPESAFE_FLUSH;
|
|
|
|
if (count < flush_limit)
|
|
count <<= 1;
|
|
else
|
|
count += flush_limit;
|
|
return count;
|
|
}
|
|
|
|
static int find_common(struct fetch_pack_args *args,
|
|
int fd[2], unsigned char *result_sha1,
|
|
struct ref *refs)
|
|
{
|
|
int fetching;
|
|
int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
|
|
const unsigned char *sha1;
|
|
unsigned in_vain = 0;
|
|
int got_continue = 0;
|
|
int got_ready = 0;
|
|
struct strbuf req_buf = STRBUF_INIT;
|
|
size_t state_len = 0;
|
|
|
|
if (args->stateless_rpc && multi_ack == 1)
|
|
die("--stateless-rpc requires multi_ack_detailed");
|
|
if (marked)
|
|
for_each_ref(clear_marks, NULL);
|
|
marked = 1;
|
|
|
|
for_each_ref(rev_list_insert_ref_oid, NULL);
|
|
for_each_alternate_ref(insert_one_alternate_ref, NULL);
|
|
|
|
fetching = 0;
|
|
for ( ; refs ; refs = refs->next) {
|
|
unsigned char *remote = refs->old_oid.hash;
|
|
const char *remote_hex;
|
|
struct object *o;
|
|
|
|
/*
|
|
* If that object is complete (i.e. it is an ancestor of a
|
|
* local ref), we tell them we have it but do not have to
|
|
* tell them about its ancestors, which they already know
|
|
* about.
|
|
*
|
|
* We use lookup_object here because we are only
|
|
* interested in the case we *know* the object is
|
|
* reachable and we have already scanned it.
|
|
*/
|
|
if (((o = lookup_object(remote)) != NULL) &&
|
|
(o->flags & COMPLETE)) {
|
|
continue;
|
|
}
|
|
|
|
remote_hex = sha1_to_hex(remote);
|
|
if (!fetching) {
|
|
struct strbuf c = STRBUF_INIT;
|
|
if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
|
|
if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
|
|
if (no_done) strbuf_addstr(&c, " no-done");
|
|
if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
|
|
if (use_sideband == 1) strbuf_addstr(&c, " side-band");
|
|
if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
|
|
if (args->no_progress) strbuf_addstr(&c, " no-progress");
|
|
if (args->include_tag) strbuf_addstr(&c, " include-tag");
|
|
if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
|
|
if (agent_supported) strbuf_addf(&c, " agent=%s",
|
|
git_user_agent_sanitized());
|
|
packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
|
|
strbuf_release(&c);
|
|
} else
|
|
packet_buf_write(&req_buf, "want %s\n", remote_hex);
|
|
fetching++;
|
|
}
|
|
|
|
if (!fetching) {
|
|
strbuf_release(&req_buf);
|
|
packet_flush(fd[1]);
|
|
return 1;
|
|
}
|
|
|
|
if (is_repository_shallow())
|
|
write_shallow_commits(&req_buf, 1, NULL);
|
|
if (args->depth > 0)
|
|
packet_buf_write(&req_buf, "deepen %d", args->depth);
|
|
packet_buf_flush(&req_buf);
|
|
state_len = req_buf.len;
|
|
|
|
if (args->depth > 0) {
|
|
char *line;
|
|
const char *arg;
|
|
unsigned char sha1[20];
|
|
|
|
send_request(args, fd[1], &req_buf);
|
|
while ((line = packet_read_line(fd[0], NULL))) {
|
|
if (skip_prefix(line, "shallow ", &arg)) {
|
|
if (get_sha1_hex(arg, sha1))
|
|
die("invalid shallow line: %s", line);
|
|
register_shallow(sha1);
|
|
continue;
|
|
}
|
|
if (skip_prefix(line, "unshallow ", &arg)) {
|
|
if (get_sha1_hex(arg, sha1))
|
|
die("invalid unshallow line: %s", line);
|
|
if (!lookup_object(sha1))
|
|
die("object not found: %s", line);
|
|
/* make sure that it is parsed as shallow */
|
|
if (!parse_object(sha1))
|
|
die("error in object: %s", line);
|
|
if (unregister_shallow(sha1))
|
|
die("no shallow found: %s", line);
|
|
continue;
|
|
}
|
|
die("expected shallow/unshallow, got %s", line);
|
|
}
|
|
} else if (!args->stateless_rpc)
|
|
send_request(args, fd[1], &req_buf);
|
|
|
|
if (!args->stateless_rpc) {
|
|
/* If we aren't using the stateless-rpc interface
|
|
* we don't need to retain the headers.
|
|
*/
|
|
strbuf_setlen(&req_buf, 0);
|
|
state_len = 0;
|
|
}
|
|
|
|
flushes = 0;
|
|
retval = -1;
|
|
while ((sha1 = get_rev())) {
|
|
packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1));
|
|
if (args->verbose)
|
|
fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
|
|
in_vain++;
|
|
if (flush_at <= ++count) {
|
|
int ack;
|
|
|
|
packet_buf_flush(&req_buf);
|
|
send_request(args, fd[1], &req_buf);
|
|
strbuf_setlen(&req_buf, state_len);
|
|
flushes++;
|
|
flush_at = next_flush(args, count);
|
|
|
|
/*
|
|
* We keep one window "ahead" of the other side, and
|
|
* will wait for an ACK only on the next one
|
|
*/
|
|
if (!args->stateless_rpc && count == INITIAL_FLUSH)
|
|
continue;
|
|
|
|
consume_shallow_list(args, fd[0]);
|
|
do {
|
|
ack = get_ack(fd[0], result_sha1);
|
|
if (args->verbose && ack)
|
|
fprintf(stderr, "got ack %d %s\n", ack,
|
|
sha1_to_hex(result_sha1));
|
|
switch (ack) {
|
|
case ACK:
|
|
flushes = 0;
|
|
multi_ack = 0;
|
|
retval = 0;
|
|
goto done;
|
|
case ACK_common:
|
|
case ACK_ready:
|
|
case ACK_continue: {
|
|
struct commit *commit =
|
|
lookup_commit(result_sha1);
|
|
if (!commit)
|
|
die("invalid commit %s", sha1_to_hex(result_sha1));
|
|
if (args->stateless_rpc
|
|
&& ack == ACK_common
|
|
&& !(commit->object.flags & COMMON)) {
|
|
/* We need to replay the have for this object
|
|
* on the next RPC request so the peer knows
|
|
* it is in common with us.
|
|
*/
|
|
const char *hex = sha1_to_hex(result_sha1);
|
|
packet_buf_write(&req_buf, "have %s\n", hex);
|
|
state_len = req_buf.len;
|
|
}
|
|
mark_common(commit, 0, 1);
|
|
retval = 0;
|
|
in_vain = 0;
|
|
got_continue = 1;
|
|
if (ack == ACK_ready) {
|
|
clear_prio_queue(&rev_list);
|
|
got_ready = 1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} while (ack);
|
|
flushes--;
|
|
if (got_continue && MAX_IN_VAIN < in_vain) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "giving up\n");
|
|
break; /* give up */
|
|
}
|
|
}
|
|
}
|
|
done:
|
|
if (!got_ready || !no_done) {
|
|
packet_buf_write(&req_buf, "done\n");
|
|
send_request(args, fd[1], &req_buf);
|
|
}
|
|
if (args->verbose)
|
|
fprintf(stderr, "done\n");
|
|
if (retval != 0) {
|
|
multi_ack = 0;
|
|
flushes++;
|
|
}
|
|
strbuf_release(&req_buf);
|
|
|
|
if (!got_ready || !no_done)
|
|
consume_shallow_list(args, fd[0]);
|
|
while (flushes || multi_ack) {
|
|
int ack = get_ack(fd[0], result_sha1);
|
|
if (ack) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "got ack (%d) %s\n", ack,
|
|
sha1_to_hex(result_sha1));
|
|
if (ack == ACK)
|
|
return 0;
|
|
multi_ack = 1;
|
|
continue;
|
|
}
|
|
flushes--;
|
|
}
|
|
/* it is no error to fetch into a completely empty repo */
|
|
return count ? retval : 0;
|
|
}
|
|
|
|
static struct commit_list *complete;
|
|
|
|
static int mark_complete(const unsigned char *sha1)
|
|
{
|
|
struct object *o = parse_object(sha1);
|
|
|
|
while (o && o->type == OBJ_TAG) {
|
|
struct tag *t = (struct tag *) o;
|
|
if (!t->tagged)
|
|
break; /* broken repository */
|
|
o->flags |= COMPLETE;
|
|
o = parse_object(t->tagged->oid.hash);
|
|
}
|
|
if (o && o->type == OBJ_COMMIT) {
|
|
struct commit *commit = (struct commit *)o;
|
|
if (!(commit->object.flags & COMPLETE)) {
|
|
commit->object.flags |= COMPLETE;
|
|
commit_list_insert(commit, &complete);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mark_complete_oid(const char *refname, const struct object_id *oid,
|
|
int flag, void *cb_data)
|
|
{
|
|
return mark_complete(oid->hash);
|
|
}
|
|
|
|
static void mark_recent_complete_commits(struct fetch_pack_args *args,
|
|
unsigned long cutoff)
|
|
{
|
|
while (complete && cutoff <= complete->item->date) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Marking %s as complete\n",
|
|
oid_to_hex(&complete->item->object.oid));
|
|
pop_most_recent_commit(&complete, COMPLETE);
|
|
}
|
|
}
|
|
|
|
static void filter_refs(struct fetch_pack_args *args,
|
|
struct ref **refs,
|
|
struct ref **sought, int nr_sought)
|
|
{
|
|
struct ref *newlist = NULL;
|
|
struct ref **newtail = &newlist;
|
|
struct ref *ref, *next;
|
|
int i;
|
|
|
|
i = 0;
|
|
for (ref = *refs; ref; ref = next) {
|
|
int keep = 0;
|
|
next = ref->next;
|
|
|
|
if (starts_with(ref->name, "refs/") &&
|
|
check_refname_format(ref->name, 0))
|
|
; /* trash */
|
|
else {
|
|
while (i < nr_sought) {
|
|
int cmp = strcmp(ref->name, sought[i]->name);
|
|
if (cmp < 0)
|
|
break; /* definitely do not have it */
|
|
else if (cmp == 0) {
|
|
keep = 1; /* definitely have it */
|
|
sought[i]->matched = 1;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (!keep && args->fetch_all &&
|
|
(!args->depth || !starts_with(ref->name, "refs/tags/")))
|
|
keep = 1;
|
|
|
|
if (keep) {
|
|
*newtail = ref;
|
|
ref->next = NULL;
|
|
newtail = &ref->next;
|
|
} else {
|
|
free(ref);
|
|
}
|
|
}
|
|
|
|
/* Append unmatched requests to the list */
|
|
if ((allow_unadvertised_object_request &
|
|
(ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1))) {
|
|
for (i = 0; i < nr_sought; i++) {
|
|
unsigned char sha1[20];
|
|
|
|
ref = sought[i];
|
|
if (ref->matched)
|
|
continue;
|
|
if (get_sha1_hex(ref->name, sha1) ||
|
|
ref->name[40] != '\0' ||
|
|
hashcmp(sha1, ref->old_oid.hash))
|
|
continue;
|
|
|
|
ref->matched = 1;
|
|
*newtail = copy_ref(ref);
|
|
newtail = &(*newtail)->next;
|
|
}
|
|
}
|
|
*refs = newlist;
|
|
}
|
|
|
|
static void mark_alternate_complete(const struct ref *ref, void *unused)
|
|
{
|
|
mark_complete(ref->old_oid.hash);
|
|
}
|
|
|
|
static int everything_local(struct fetch_pack_args *args,
|
|
struct ref **refs,
|
|
struct ref **sought, int nr_sought)
|
|
{
|
|
struct ref *ref;
|
|
int retval;
|
|
unsigned long cutoff = 0;
|
|
|
|
save_commit_buffer = 0;
|
|
|
|
for (ref = *refs; ref; ref = ref->next) {
|
|
struct object *o;
|
|
|
|
if (!has_object_file(&ref->old_oid))
|
|
continue;
|
|
|
|
o = parse_object(ref->old_oid.hash);
|
|
if (!o)
|
|
continue;
|
|
|
|
/* We already have it -- which may mean that we were
|
|
* in sync with the other side at some time after
|
|
* that (it is OK if we guess wrong here).
|
|
*/
|
|
if (o->type == OBJ_COMMIT) {
|
|
struct commit *commit = (struct commit *)o;
|
|
if (!cutoff || cutoff < commit->date)
|
|
cutoff = commit->date;
|
|
}
|
|
}
|
|
|
|
if (!args->depth) {
|
|
for_each_ref(mark_complete_oid, NULL);
|
|
for_each_alternate_ref(mark_alternate_complete, NULL);
|
|
commit_list_sort_by_date(&complete);
|
|
if (cutoff)
|
|
mark_recent_complete_commits(args, cutoff);
|
|
}
|
|
|
|
/*
|
|
* Mark all complete remote refs as common refs.
|
|
* Don't mark them common yet; the server has to be told so first.
|
|
*/
|
|
for (ref = *refs; ref; ref = ref->next) {
|
|
struct object *o = deref_tag(lookup_object(ref->old_oid.hash),
|
|
NULL, 0);
|
|
|
|
if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
|
|
continue;
|
|
|
|
if (!(o->flags & SEEN)) {
|
|
rev_list_push((struct commit *)o, COMMON_REF | SEEN);
|
|
|
|
mark_common((struct commit *)o, 1, 1);
|
|
}
|
|
}
|
|
|
|
filter_refs(args, refs, sought, nr_sought);
|
|
|
|
for (retval = 1, ref = *refs; ref ; ref = ref->next) {
|
|
const unsigned char *remote = ref->old_oid.hash;
|
|
struct object *o;
|
|
|
|
o = lookup_object(remote);
|
|
if (!o || !(o->flags & COMPLETE)) {
|
|
retval = 0;
|
|
if (!args->verbose)
|
|
continue;
|
|
fprintf(stderr,
|
|
"want %s (%s)\n", sha1_to_hex(remote),
|
|
ref->name);
|
|
continue;
|
|
}
|
|
if (!args->verbose)
|
|
continue;
|
|
fprintf(stderr,
|
|
"already have %s (%s)\n", sha1_to_hex(remote),
|
|
ref->name);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int sideband_demux(int in, int out, void *data)
|
|
{
|
|
int *xd = data;
|
|
|
|
int ret = recv_sideband("fetch-pack", xd[0], out);
|
|
close(out);
|
|
return ret;
|
|
}
|
|
|
|
static int get_pack(struct fetch_pack_args *args,
|
|
int xd[2], char **pack_lockfile)
|
|
{
|
|
struct async demux;
|
|
int do_keep = args->keep_pack;
|
|
const char *cmd_name;
|
|
struct pack_header header;
|
|
int pass_header = 0;
|
|
struct child_process cmd = CHILD_PROCESS_INIT;
|
|
int ret;
|
|
|
|
memset(&demux, 0, sizeof(demux));
|
|
if (use_sideband) {
|
|
/* xd[] is talking with upload-pack; subprocess reads from
|
|
* xd[0], spits out band#2 to stderr, and feeds us band#1
|
|
* through demux->out.
|
|
*/
|
|
demux.proc = sideband_demux;
|
|
demux.data = xd;
|
|
demux.out = -1;
|
|
if (start_async(&demux))
|
|
die("fetch-pack: unable to fork off sideband"
|
|
" demultiplexer");
|
|
}
|
|
else
|
|
demux.out = xd[0];
|
|
|
|
if (!args->keep_pack && unpack_limit) {
|
|
|
|
if (read_pack_header(demux.out, &header))
|
|
die("protocol error: bad pack header");
|
|
pass_header = 1;
|
|
if (ntohl(header.hdr_entries) < unpack_limit)
|
|
do_keep = 0;
|
|
else
|
|
do_keep = 1;
|
|
}
|
|
|
|
if (alternate_shallow_file) {
|
|
argv_array_push(&cmd.args, "--shallow-file");
|
|
argv_array_push(&cmd.args, alternate_shallow_file);
|
|
}
|
|
|
|
if (do_keep) {
|
|
if (pack_lockfile)
|
|
cmd.out = -1;
|
|
cmd_name = "index-pack";
|
|
argv_array_push(&cmd.args, cmd_name);
|
|
argv_array_push(&cmd.args, "--stdin");
|
|
if (!args->quiet && !args->no_progress)
|
|
argv_array_push(&cmd.args, "-v");
|
|
if (args->use_thin_pack)
|
|
argv_array_push(&cmd.args, "--fix-thin");
|
|
if (args->lock_pack || unpack_limit) {
|
|
char hostname[256];
|
|
if (gethostname(hostname, sizeof(hostname)))
|
|
xsnprintf(hostname, sizeof(hostname), "localhost");
|
|
argv_array_pushf(&cmd.args,
|
|
"--keep=fetch-pack %"PRIuMAX " on %s",
|
|
(uintmax_t)getpid(), hostname);
|
|
}
|
|
if (args->check_self_contained_and_connected)
|
|
argv_array_push(&cmd.args, "--check-self-contained-and-connected");
|
|
}
|
|
else {
|
|
cmd_name = "unpack-objects";
|
|
argv_array_push(&cmd.args, cmd_name);
|
|
if (args->quiet || args->no_progress)
|
|
argv_array_push(&cmd.args, "-q");
|
|
args->check_self_contained_and_connected = 0;
|
|
}
|
|
|
|
if (pass_header)
|
|
argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
|
|
ntohl(header.hdr_version),
|
|
ntohl(header.hdr_entries));
|
|
if (fetch_fsck_objects >= 0
|
|
? fetch_fsck_objects
|
|
: transfer_fsck_objects >= 0
|
|
? transfer_fsck_objects
|
|
: 0)
|
|
argv_array_push(&cmd.args, "--strict");
|
|
|
|
cmd.in = demux.out;
|
|
cmd.git_cmd = 1;
|
|
if (start_command(&cmd))
|
|
die("fetch-pack: unable to fork off %s", cmd_name);
|
|
if (do_keep && pack_lockfile) {
|
|
*pack_lockfile = index_pack_lockfile(cmd.out);
|
|
close(cmd.out);
|
|
}
|
|
|
|
if (!use_sideband)
|
|
/* Closed by start_command() */
|
|
xd[0] = -1;
|
|
|
|
ret = finish_command(&cmd);
|
|
if (!ret || (args->check_self_contained_and_connected && ret == 1))
|
|
args->self_contained_and_connected =
|
|
args->check_self_contained_and_connected &&
|
|
ret == 0;
|
|
else
|
|
die("%s failed", cmd_name);
|
|
if (use_sideband && finish_async(&demux))
|
|
die("error in sideband demultiplexer");
|
|
return 0;
|
|
}
|
|
|
|
static int cmp_ref_by_name(const void *a_, const void *b_)
|
|
{
|
|
const struct ref *a = *((const struct ref **)a_);
|
|
const struct ref *b = *((const struct ref **)b_);
|
|
return strcmp(a->name, b->name);
|
|
}
|
|
|
|
static struct ref *do_fetch_pack(struct fetch_pack_args *args,
|
|
int fd[2],
|
|
const struct ref *orig_ref,
|
|
struct ref **sought, int nr_sought,
|
|
struct shallow_info *si,
|
|
char **pack_lockfile)
|
|
{
|
|
struct ref *ref = copy_ref_list(orig_ref);
|
|
unsigned char sha1[20];
|
|
const char *agent_feature;
|
|
int agent_len;
|
|
|
|
sort_ref_list(&ref, ref_compare_name);
|
|
qsort(sought, nr_sought, sizeof(*sought), cmp_ref_by_name);
|
|
|
|
if ((args->depth > 0 || is_repository_shallow()) && !server_supports("shallow"))
|
|
die("Server does not support shallow clients");
|
|
if (server_supports("multi_ack_detailed")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports multi_ack_detailed\n");
|
|
multi_ack = 2;
|
|
if (server_supports("no-done")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports no-done\n");
|
|
if (args->stateless_rpc)
|
|
no_done = 1;
|
|
}
|
|
}
|
|
else if (server_supports("multi_ack")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports multi_ack\n");
|
|
multi_ack = 1;
|
|
}
|
|
if (server_supports("side-band-64k")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports side-band-64k\n");
|
|
use_sideband = 2;
|
|
}
|
|
else if (server_supports("side-band")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports side-band\n");
|
|
use_sideband = 1;
|
|
}
|
|
if (server_supports("allow-tip-sha1-in-want")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports allow-tip-sha1-in-want\n");
|
|
allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
|
|
}
|
|
if (server_supports("allow-reachable-sha1-in-want")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports allow-reachable-sha1-in-want\n");
|
|
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
|
|
}
|
|
if (!server_supports("thin-pack"))
|
|
args->use_thin_pack = 0;
|
|
if (!server_supports("no-progress"))
|
|
args->no_progress = 0;
|
|
if (!server_supports("include-tag"))
|
|
args->include_tag = 0;
|
|
if (server_supports("ofs-delta")) {
|
|
if (args->verbose)
|
|
fprintf(stderr, "Server supports ofs-delta\n");
|
|
} else
|
|
prefer_ofs_delta = 0;
|
|
|
|
if ((agent_feature = server_feature_value("agent", &agent_len))) {
|
|
agent_supported = 1;
|
|
if (args->verbose && agent_len)
|
|
fprintf(stderr, "Server version is %.*s\n",
|
|
agent_len, agent_feature);
|
|
}
|
|
|
|
if (everything_local(args, &ref, sought, nr_sought)) {
|
|
packet_flush(fd[1]);
|
|
goto all_done;
|
|
}
|
|
if (find_common(args, fd, sha1, ref) < 0)
|
|
if (!args->keep_pack)
|
|
/* When cloning, it is not unusual to have
|
|
* no common commit.
|
|
*/
|
|
warning("no common commits");
|
|
|
|
if (args->stateless_rpc)
|
|
packet_flush(fd[1]);
|
|
if (args->depth > 0)
|
|
setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
|
|
NULL);
|
|
else if (si->nr_ours || si->nr_theirs)
|
|
alternate_shallow_file = setup_temporary_shallow(si->shallow);
|
|
else
|
|
alternate_shallow_file = NULL;
|
|
if (get_pack(args, fd, pack_lockfile))
|
|
die("git fetch-pack: fetch failed.");
|
|
|
|
all_done:
|
|
return ref;
|
|
}
|
|
|
|
static void fetch_pack_config(void)
|
|
{
|
|
git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
|
|
git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
|
|
git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
|
|
git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
|
|
git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
|
|
|
|
git_config(git_default_config, NULL);
|
|
}
|
|
|
|
static void fetch_pack_setup(void)
|
|
{
|
|
static int did_setup;
|
|
if (did_setup)
|
|
return;
|
|
fetch_pack_config();
|
|
if (0 <= transfer_unpack_limit)
|
|
unpack_limit = transfer_unpack_limit;
|
|
else if (0 <= fetch_unpack_limit)
|
|
unpack_limit = fetch_unpack_limit;
|
|
did_setup = 1;
|
|
}
|
|
|
|
static int remove_duplicates_in_refs(struct ref **ref, int nr)
|
|
{
|
|
struct string_list names = STRING_LIST_INIT_NODUP;
|
|
int src, dst;
|
|
|
|
for (src = dst = 0; src < nr; src++) {
|
|
struct string_list_item *item;
|
|
item = string_list_insert(&names, ref[src]->name);
|
|
if (item->util)
|
|
continue; /* already have it */
|
|
item->util = ref[src];
|
|
if (src != dst)
|
|
ref[dst] = ref[src];
|
|
dst++;
|
|
}
|
|
for (src = dst; src < nr; src++)
|
|
ref[src] = NULL;
|
|
string_list_clear(&names, 0);
|
|
return dst;
|
|
}
|
|
|
|
static void update_shallow(struct fetch_pack_args *args,
|
|
struct ref **sought, int nr_sought,
|
|
struct shallow_info *si)
|
|
{
|
|
struct sha1_array ref = SHA1_ARRAY_INIT;
|
|
int *status;
|
|
int i;
|
|
|
|
if (args->depth > 0 && alternate_shallow_file) {
|
|
if (*alternate_shallow_file == '\0') { /* --unshallow */
|
|
unlink_or_warn(git_path_shallow());
|
|
rollback_lock_file(&shallow_lock);
|
|
} else
|
|
commit_lock_file(&shallow_lock);
|
|
return;
|
|
}
|
|
|
|
if (!si->shallow || !si->shallow->nr)
|
|
return;
|
|
|
|
if (args->cloning) {
|
|
/*
|
|
* remote is shallow, but this is a clone, there are
|
|
* no objects in repo to worry about. Accept any
|
|
* shallow points that exist in the pack (iow in repo
|
|
* after get_pack() and reprepare_packed_git())
|
|
*/
|
|
struct sha1_array extra = SHA1_ARRAY_INIT;
|
|
unsigned char (*sha1)[20] = si->shallow->sha1;
|
|
for (i = 0; i < si->shallow->nr; i++)
|
|
if (has_sha1_file(sha1[i]))
|
|
sha1_array_append(&extra, sha1[i]);
|
|
if (extra.nr) {
|
|
setup_alternate_shallow(&shallow_lock,
|
|
&alternate_shallow_file,
|
|
&extra);
|
|
commit_lock_file(&shallow_lock);
|
|
}
|
|
sha1_array_clear(&extra);
|
|
return;
|
|
}
|
|
|
|
if (!si->nr_ours && !si->nr_theirs)
|
|
return;
|
|
|
|
remove_nonexistent_theirs_shallow(si);
|
|
if (!si->nr_ours && !si->nr_theirs)
|
|
return;
|
|
for (i = 0; i < nr_sought; i++)
|
|
sha1_array_append(&ref, sought[i]->old_oid.hash);
|
|
si->ref = &ref;
|
|
|
|
if (args->update_shallow) {
|
|
/*
|
|
* remote is also shallow, .git/shallow may be updated
|
|
* so all refs can be accepted. Make sure we only add
|
|
* shallow roots that are actually reachable from new
|
|
* refs.
|
|
*/
|
|
struct sha1_array extra = SHA1_ARRAY_INIT;
|
|
unsigned char (*sha1)[20] = si->shallow->sha1;
|
|
assign_shallow_commits_to_refs(si, NULL, NULL);
|
|
if (!si->nr_ours && !si->nr_theirs) {
|
|
sha1_array_clear(&ref);
|
|
return;
|
|
}
|
|
for (i = 0; i < si->nr_ours; i++)
|
|
sha1_array_append(&extra, sha1[si->ours[i]]);
|
|
for (i = 0; i < si->nr_theirs; i++)
|
|
sha1_array_append(&extra, sha1[si->theirs[i]]);
|
|
setup_alternate_shallow(&shallow_lock,
|
|
&alternate_shallow_file,
|
|
&extra);
|
|
commit_lock_file(&shallow_lock);
|
|
sha1_array_clear(&extra);
|
|
sha1_array_clear(&ref);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* remote is also shallow, check what ref is safe to update
|
|
* without updating .git/shallow
|
|
*/
|
|
status = xcalloc(nr_sought, sizeof(*status));
|
|
assign_shallow_commits_to_refs(si, NULL, status);
|
|
if (si->nr_ours || si->nr_theirs) {
|
|
for (i = 0; i < nr_sought; i++)
|
|
if (status[i])
|
|
sought[i]->status = REF_STATUS_REJECT_SHALLOW;
|
|
}
|
|
free(status);
|
|
sha1_array_clear(&ref);
|
|
}
|
|
|
|
struct ref *fetch_pack(struct fetch_pack_args *args,
|
|
int fd[], struct child_process *conn,
|
|
const struct ref *ref,
|
|
const char *dest,
|
|
struct ref **sought, int nr_sought,
|
|
struct sha1_array *shallow,
|
|
char **pack_lockfile)
|
|
{
|
|
struct ref *ref_cpy;
|
|
struct shallow_info si;
|
|
|
|
fetch_pack_setup();
|
|
if (nr_sought)
|
|
nr_sought = remove_duplicates_in_refs(sought, nr_sought);
|
|
|
|
if (!ref) {
|
|
packet_flush(fd[1]);
|
|
die("no matching remote head");
|
|
}
|
|
prepare_shallow_info(&si, shallow);
|
|
ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
|
|
&si, pack_lockfile);
|
|
reprepare_packed_git();
|
|
update_shallow(args, sought, nr_sought, &si);
|
|
clear_shallow_info(&si);
|
|
return ref_cpy;
|
|
}
|