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![Jeff King](/assets/img/avatar_default.png)
Commit 024aa4696c
(fetch-pack.c: use oidset to check existence of loose
object, 2018-03-14) added a cache to avoid calling stat() for a bunch of
loose objects we don't have.
Now that OBJECT_INFO_QUICK handles this caching itself, we can drop the
custom solution.
Note that this might perform slightly differently, as the original code
stopped calling readdir() when we saw more loose objects than there were
refs. So:
1. The old code might have spent work on readdir() to fill the cache,
but then decided there were too many loose objects, wasting that
effort.
2. The new code might spend a lot of time on readdir() if you have a
lot of loose objects, even though there are very few objects to
ask about.
In practice it probably won't matter either way; see the previous commit
for some discussion of the tradeoff.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1650 lines
44 KiB
C
1650 lines
44 KiB
C
#include "cache.h"
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#include "repository.h"
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#include "config.h"
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#include "lockfile.h"
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#include "refs.h"
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#include "pkt-line.h"
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#include "commit.h"
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#include "tag.h"
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#include "exec-cmd.h"
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#include "pack.h"
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#include "sideband.h"
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#include "fetch-pack.h"
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#include "remote.h"
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#include "run-command.h"
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#include "connect.h"
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#include "transport.h"
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#include "version.h"
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#include "sha1-array.h"
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#include "oidset.h"
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#include "packfile.h"
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#include "object-store.h"
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#include "connected.h"
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#include "fetch-negotiator.h"
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#include "fsck.h"
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static int transfer_unpack_limit = -1;
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static int fetch_unpack_limit = -1;
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static int unpack_limit = 100;
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static int prefer_ofs_delta = 1;
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static int no_done;
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static int deepen_since_ok;
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static int deepen_not_ok;
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static int fetch_fsck_objects = -1;
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static int transfer_fsck_objects = -1;
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static int agent_supported;
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static int server_supports_filtering;
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static struct lock_file shallow_lock;
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static const char *alternate_shallow_file;
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static char *negotiation_algorithm;
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static struct strbuf fsck_msg_types = STRBUF_INIT;
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/* Remember to update object flag allocation in object.h */
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#define COMPLETE (1U << 0)
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#define ALTERNATE (1U << 1)
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/*
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* After sending this many "have"s if we do not get any new ACK , we
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* give up traversing our history.
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*/
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#define MAX_IN_VAIN 256
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static int multi_ack, use_sideband;
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/* Allow specifying sha1 if it is a ref tip. */
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#define ALLOW_TIP_SHA1 01
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/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
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#define ALLOW_REACHABLE_SHA1 02
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static unsigned int allow_unadvertised_object_request;
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__attribute__((format (printf, 2, 3)))
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static inline void print_verbose(const struct fetch_pack_args *args,
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const char *fmt, ...)
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{
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va_list params;
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if (!args->verbose)
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return;
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va_start(params, fmt);
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vfprintf(stderr, fmt, params);
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va_end(params);
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fputc('\n', stderr);
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}
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struct alternate_object_cache {
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struct object **items;
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size_t nr, alloc;
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};
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static void cache_one_alternate(const struct object_id *oid,
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void *vcache)
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{
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struct alternate_object_cache *cache = vcache;
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struct object *obj = parse_object(the_repository, oid);
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if (!obj || (obj->flags & ALTERNATE))
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return;
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obj->flags |= ALTERNATE;
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ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
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cache->items[cache->nr++] = obj;
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}
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static void for_each_cached_alternate(struct fetch_negotiator *negotiator,
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void (*cb)(struct fetch_negotiator *,
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struct object *))
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{
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static int initialized;
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static struct alternate_object_cache cache;
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size_t i;
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if (!initialized) {
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for_each_alternate_ref(cache_one_alternate, &cache);
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initialized = 1;
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}
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for (i = 0; i < cache.nr; i++)
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cb(negotiator, cache.items[i]);
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}
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static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
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const char *refname,
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const struct object_id *oid)
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{
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struct object *o = deref_tag(the_repository,
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parse_object(the_repository, oid),
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refname, 0);
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if (o && o->type == OBJ_COMMIT)
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negotiator->add_tip(negotiator, (struct commit *)o);
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return 0;
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}
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static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
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int flag, void *cb_data)
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{
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return rev_list_insert_ref(cb_data, refname, oid);
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}
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enum ack_type {
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NAK = 0,
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ACK,
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ACK_continue,
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ACK_common,
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ACK_ready
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};
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static void consume_shallow_list(struct fetch_pack_args *args, int fd)
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{
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if (args->stateless_rpc && args->deepen) {
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/* If we sent a depth we will get back "duplicate"
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* shallow and unshallow commands every time there
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* is a block of have lines exchanged.
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*/
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char *line;
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while ((line = packet_read_line(fd, NULL))) {
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if (starts_with(line, "shallow "))
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continue;
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if (starts_with(line, "unshallow "))
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continue;
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die(_("git fetch-pack: expected shallow list"));
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}
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}
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}
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static enum ack_type get_ack(int fd, struct object_id *result_oid)
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{
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int len;
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char *line = packet_read_line(fd, &len);
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const char *arg;
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if (!line)
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die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
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if (!strcmp(line, "NAK"))
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return NAK;
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if (skip_prefix(line, "ACK ", &arg)) {
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if (!get_oid_hex(arg, result_oid)) {
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arg += 40;
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len -= arg - line;
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if (len < 1)
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return ACK;
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if (strstr(arg, "continue"))
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return ACK_continue;
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if (strstr(arg, "common"))
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return ACK_common;
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if (strstr(arg, "ready"))
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return ACK_ready;
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return ACK;
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}
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}
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if (skip_prefix(line, "ERR ", &arg))
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die(_("remote error: %s"), arg);
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die(_("git fetch-pack: expected ACK/NAK, got '%s'"), line);
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}
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static void send_request(struct fetch_pack_args *args,
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int fd, struct strbuf *buf)
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{
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if (args->stateless_rpc) {
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send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
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packet_flush(fd);
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} else
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write_or_die(fd, buf->buf, buf->len);
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}
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static void insert_one_alternate_object(struct fetch_negotiator *negotiator,
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struct object *obj)
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{
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rev_list_insert_ref(negotiator, NULL, &obj->oid);
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}
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#define INITIAL_FLUSH 16
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#define PIPESAFE_FLUSH 32
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#define LARGE_FLUSH 16384
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static int next_flush(int stateless_rpc, int count)
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{
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if (stateless_rpc) {
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if (count < LARGE_FLUSH)
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count <<= 1;
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else
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count = count * 11 / 10;
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} else {
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if (count < PIPESAFE_FLUSH)
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count <<= 1;
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else
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count += PIPESAFE_FLUSH;
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}
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return count;
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}
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static void mark_tips(struct fetch_negotiator *negotiator,
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const struct oid_array *negotiation_tips)
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{
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int i;
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if (!negotiation_tips) {
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for_each_ref(rev_list_insert_ref_oid, negotiator);
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return;
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}
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for (i = 0; i < negotiation_tips->nr; i++)
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rev_list_insert_ref(negotiator, NULL,
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&negotiation_tips->oid[i]);
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return;
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}
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static int find_common(struct fetch_negotiator *negotiator,
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struct fetch_pack_args *args,
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int fd[2], struct object_id *result_oid,
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struct ref *refs)
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{
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int fetching;
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int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
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const struct object_id *oid;
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unsigned in_vain = 0;
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int got_continue = 0;
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int got_ready = 0;
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struct strbuf req_buf = STRBUF_INIT;
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size_t state_len = 0;
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if (args->stateless_rpc && multi_ack == 1)
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die(_("--stateless-rpc requires multi_ack_detailed"));
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if (!args->no_dependents) {
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mark_tips(negotiator, args->negotiation_tips);
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for_each_cached_alternate(negotiator, insert_one_alternate_object);
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}
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fetching = 0;
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for ( ; refs ; refs = refs->next) {
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struct object_id *remote = &refs->old_oid;
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const char *remote_hex;
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struct object *o;
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/*
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* If that object is complete (i.e. it is an ancestor of a
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* local ref), we tell them we have it but do not have to
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* tell them about its ancestors, which they already know
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* about.
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*
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* We use lookup_object here because we are only
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* interested in the case we *know* the object is
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* reachable and we have already scanned it.
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*
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* Do this only if args->no_dependents is false (if it is true,
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* we cannot trust the object flags).
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*/
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if (!args->no_dependents &&
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((o = lookup_object(the_repository, remote->hash)) != NULL) &&
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(o->flags & COMPLETE)) {
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continue;
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}
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remote_hex = oid_to_hex(remote);
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if (!fetching) {
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struct strbuf c = STRBUF_INIT;
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if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
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if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
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if (no_done) strbuf_addstr(&c, " no-done");
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if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
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if (use_sideband == 1) strbuf_addstr(&c, " side-band");
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if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
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if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
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if (args->no_progress) strbuf_addstr(&c, " no-progress");
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if (args->include_tag) strbuf_addstr(&c, " include-tag");
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if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
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if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
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if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
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if (agent_supported) strbuf_addf(&c, " agent=%s",
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git_user_agent_sanitized());
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if (args->filter_options.choice)
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strbuf_addstr(&c, " filter");
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packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
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strbuf_release(&c);
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} else
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packet_buf_write(&req_buf, "want %s\n", remote_hex);
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fetching++;
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}
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if (!fetching) {
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strbuf_release(&req_buf);
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packet_flush(fd[1]);
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return 1;
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}
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if (is_repository_shallow(the_repository))
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write_shallow_commits(&req_buf, 1, NULL);
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if (args->depth > 0)
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packet_buf_write(&req_buf, "deepen %d", args->depth);
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if (args->deepen_since) {
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timestamp_t max_age = approxidate(args->deepen_since);
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packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
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}
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if (args->deepen_not) {
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int i;
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for (i = 0; i < args->deepen_not->nr; i++) {
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struct string_list_item *s = args->deepen_not->items + i;
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packet_buf_write(&req_buf, "deepen-not %s", s->string);
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}
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}
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if (server_supports_filtering && args->filter_options.choice)
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packet_buf_write(&req_buf, "filter %s",
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args->filter_options.filter_spec);
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packet_buf_flush(&req_buf);
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state_len = req_buf.len;
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if (args->deepen) {
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char *line;
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const char *arg;
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struct object_id oid;
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send_request(args, fd[1], &req_buf);
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while ((line = packet_read_line(fd[0], NULL))) {
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if (skip_prefix(line, "shallow ", &arg)) {
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if (get_oid_hex(arg, &oid))
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die(_("invalid shallow line: %s"), line);
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register_shallow(the_repository, &oid);
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continue;
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}
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if (skip_prefix(line, "unshallow ", &arg)) {
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if (get_oid_hex(arg, &oid))
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die(_("invalid unshallow line: %s"), line);
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if (!lookup_object(the_repository, oid.hash))
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die(_("object not found: %s"), line);
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/* make sure that it is parsed as shallow */
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if (!parse_object(the_repository, &oid))
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die(_("error in object: %s"), line);
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if (unregister_shallow(&oid))
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die(_("no shallow found: %s"), line);
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continue;
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}
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die(_("expected shallow/unshallow, got %s"), line);
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}
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} else if (!args->stateless_rpc)
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send_request(args, fd[1], &req_buf);
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|
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if (!args->stateless_rpc) {
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/* If we aren't using the stateless-rpc interface
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* we don't need to retain the headers.
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*/
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strbuf_setlen(&req_buf, 0);
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state_len = 0;
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}
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flushes = 0;
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retval = -1;
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if (args->no_dependents)
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goto done;
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while ((oid = negotiator->next(negotiator))) {
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packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
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print_verbose(args, "have %s", oid_to_hex(oid));
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in_vain++;
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if (flush_at <= ++count) {
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int ack;
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packet_buf_flush(&req_buf);
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send_request(args, fd[1], &req_buf);
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strbuf_setlen(&req_buf, state_len);
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flushes++;
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flush_at = next_flush(args->stateless_rpc, count);
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/*
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* We keep one window "ahead" of the other side, and
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* will wait for an ACK only on the next one
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*/
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if (!args->stateless_rpc && count == INITIAL_FLUSH)
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continue;
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|
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consume_shallow_list(args, fd[0]);
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do {
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ack = get_ack(fd[0], result_oid);
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if (ack)
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print_verbose(args, _("got %s %d %s"), "ack",
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ack, oid_to_hex(result_oid));
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switch (ack) {
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case ACK:
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flushes = 0;
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multi_ack = 0;
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retval = 0;
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goto done;
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case ACK_common:
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case ACK_ready:
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case ACK_continue: {
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struct commit *commit =
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lookup_commit(the_repository,
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result_oid);
|
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int was_common;
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|
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if (!commit)
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die(_("invalid commit %s"), oid_to_hex(result_oid));
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was_common = negotiator->ack(negotiator, commit);
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if (args->stateless_rpc
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&& ack == ACK_common
|
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&& !was_common) {
|
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/* We need to replay the have for this object
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* on the next RPC request so the peer knows
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* it is in common with us.
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*/
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const char *hex = oid_to_hex(result_oid);
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packet_buf_write(&req_buf, "have %s\n", hex);
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state_len = req_buf.len;
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/*
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* Reset in_vain because an ack
|
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* for this commit has not been
|
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* seen.
|
|
*/
|
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in_vain = 0;
|
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} else if (!args->stateless_rpc
|
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|| ack != ACK_common)
|
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in_vain = 0;
|
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retval = 0;
|
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got_continue = 1;
|
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if (ack == ACK_ready)
|
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got_ready = 1;
|
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break;
|
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}
|
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}
|
|
} while (ack);
|
|
flushes--;
|
|
if (got_continue && MAX_IN_VAIN < in_vain) {
|
|
print_verbose(args, _("giving up"));
|
|
break; /* give up */
|
|
}
|
|
if (got_ready)
|
|
break;
|
|
}
|
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}
|
|
done:
|
|
if (!got_ready || !no_done) {
|
|
packet_buf_write(&req_buf, "done\n");
|
|
send_request(args, fd[1], &req_buf);
|
|
}
|
|
print_verbose(args, _("done"));
|
|
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_oid);
|
|
if (ack) {
|
|
print_verbose(args, _("got %s (%d) %s"), "ack",
|
|
ack, oid_to_hex(result_oid));
|
|
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 struct object_id *oid)
|
|
{
|
|
struct object *o = parse_object(the_repository, oid);
|
|
|
|
while (o && o->type == OBJ_TAG) {
|
|
struct tag *t = (struct tag *) o;
|
|
if (!t->tagged)
|
|
break; /* broken repository */
|
|
o->flags |= COMPLETE;
|
|
o = parse_object(the_repository, &t->tagged->oid);
|
|
}
|
|
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);
|
|
}
|
|
|
|
static void mark_recent_complete_commits(struct fetch_pack_args *args,
|
|
timestamp_t cutoff)
|
|
{
|
|
while (complete && cutoff <= complete->item->date) {
|
|
print_verbose(args, _("Marking %s as complete"),
|
|
oid_to_hex(&complete->item->object.oid));
|
|
pop_most_recent_commit(&complete, COMPLETE);
|
|
}
|
|
}
|
|
|
|
static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
|
|
{
|
|
for (; refs; refs = refs->next)
|
|
oidset_insert(oids, &refs->old_oid);
|
|
}
|
|
|
|
static int is_unmatched_ref(const struct ref *ref)
|
|
{
|
|
struct object_id oid;
|
|
const char *p;
|
|
return ref->match_status == REF_NOT_MATCHED &&
|
|
!parse_oid_hex(ref->name, &oid, &p) &&
|
|
*p == '\0' &&
|
|
oideq(&oid, &ref->old_oid);
|
|
}
|
|
|
|
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 *unmatched = NULL;
|
|
struct ref *ref, *next;
|
|
struct oidset tip_oids = OIDSET_INIT;
|
|
int i;
|
|
int strict = !(allow_unadvertised_object_request &
|
|
(ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
|
|
|
|
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]->match_status = REF_MATCHED;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
if (!keep && args->fetch_all &&
|
|
(!args->deepen || !starts_with(ref->name, "refs/tags/")))
|
|
keep = 1;
|
|
}
|
|
|
|
if (keep) {
|
|
*newtail = ref;
|
|
ref->next = NULL;
|
|
newtail = &ref->next;
|
|
} else {
|
|
ref->next = unmatched;
|
|
unmatched = ref;
|
|
}
|
|
}
|
|
|
|
if (strict) {
|
|
for (i = 0; i < nr_sought; i++) {
|
|
ref = sought[i];
|
|
if (!is_unmatched_ref(ref))
|
|
continue;
|
|
|
|
add_refs_to_oidset(&tip_oids, unmatched);
|
|
add_refs_to_oidset(&tip_oids, newlist);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Append unmatched requests to the list */
|
|
for (i = 0; i < nr_sought; i++) {
|
|
ref = sought[i];
|
|
if (!is_unmatched_ref(ref))
|
|
continue;
|
|
|
|
if (!strict || oidset_contains(&tip_oids, &ref->old_oid)) {
|
|
ref->match_status = REF_MATCHED;
|
|
*newtail = copy_ref(ref);
|
|
newtail = &(*newtail)->next;
|
|
} else {
|
|
ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
|
|
}
|
|
}
|
|
|
|
oidset_clear(&tip_oids);
|
|
for (ref = unmatched; ref; ref = next) {
|
|
next = ref->next;
|
|
free(ref);
|
|
}
|
|
|
|
*refs = newlist;
|
|
}
|
|
|
|
static void mark_alternate_complete(struct fetch_negotiator *unused,
|
|
struct object *obj)
|
|
{
|
|
mark_complete(&obj->oid);
|
|
}
|
|
|
|
struct loose_object_iter {
|
|
struct oidset *loose_object_set;
|
|
struct ref *refs;
|
|
};
|
|
|
|
/*
|
|
* Mark recent commits available locally and reachable from a local ref as
|
|
* COMPLETE. If args->no_dependents is false, also mark COMPLETE remote refs as
|
|
* COMMON_REF (otherwise, we are not planning to participate in negotiation, and
|
|
* thus do not need COMMON_REF marks).
|
|
*
|
|
* The cutoff time for recency is determined by this heuristic: it is the
|
|
* earliest commit time of the objects in refs that are commits and that we know
|
|
* the commit time of.
|
|
*/
|
|
static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
|
|
struct fetch_pack_args *args,
|
|
struct ref **refs)
|
|
{
|
|
struct ref *ref;
|
|
int old_save_commit_buffer = save_commit_buffer;
|
|
timestamp_t cutoff = 0;
|
|
|
|
save_commit_buffer = 0;
|
|
|
|
for (ref = *refs; ref; ref = ref->next) {
|
|
struct object *o;
|
|
|
|
if (!has_object_file_with_flags(&ref->old_oid,
|
|
OBJECT_INFO_QUICK))
|
|
continue;
|
|
o = parse_object(the_repository, &ref->old_oid);
|
|
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->deepen) {
|
|
for_each_ref(mark_complete_oid, NULL);
|
|
for_each_cached_alternate(NULL, mark_alternate_complete);
|
|
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(the_repository,
|
|
lookup_object(the_repository,
|
|
ref->old_oid.hash),
|
|
NULL, 0);
|
|
|
|
if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
|
|
continue;
|
|
|
|
negotiator->known_common(negotiator,
|
|
(struct commit *)o);
|
|
}
|
|
|
|
save_commit_buffer = old_save_commit_buffer;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if every object pointed to by the given remote refs is available
|
|
* locally and reachable from a local ref, and 0 otherwise.
|
|
*/
|
|
static int everything_local(struct fetch_pack_args *args,
|
|
struct ref **refs)
|
|
{
|
|
struct ref *ref;
|
|
int retval;
|
|
|
|
for (retval = 1, ref = *refs; ref ; ref = ref->next) {
|
|
const struct object_id *remote = &ref->old_oid;
|
|
struct object *o;
|
|
|
|
o = lookup_object(the_repository, remote->hash);
|
|
if (!o || !(o->flags & COMPLETE)) {
|
|
retval = 0;
|
|
print_verbose(args, "want %s (%s)", oid_to_hex(remote),
|
|
ref->name);
|
|
continue;
|
|
}
|
|
print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
|
|
ref->name);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int sideband_demux(int in, int out, void *data)
|
|
{
|
|
int *xd = data;
|
|
int ret;
|
|
|
|
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;
|
|
demux.isolate_sigpipe = 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 || args->from_promisor) {
|
|
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 (do_keep && (args->lock_pack || unpack_limit)) {
|
|
char hostname[HOST_NAME_MAX + 1];
|
|
if (xgethostname(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");
|
|
if (args->from_promisor)
|
|
argv_array_push(&cmd.args, "--promisor");
|
|
}
|
|
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) {
|
|
if (args->from_promisor)
|
|
/*
|
|
* We cannot use --strict in index-pack because it
|
|
* checks both broken objects and links, but we only
|
|
* want to check for broken objects.
|
|
*/
|
|
argv_array_push(&cmd.args, "--fsck-objects");
|
|
else
|
|
argv_array_pushf(&cmd.args, "--strict%s",
|
|
fsck_msg_types.buf);
|
|
}
|
|
|
|
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);
|
|
struct object_id oid;
|
|
const char *agent_feature;
|
|
int agent_len;
|
|
struct fetch_negotiator negotiator;
|
|
fetch_negotiator_init(&negotiator, negotiation_algorithm);
|
|
|
|
sort_ref_list(&ref, ref_compare_name);
|
|
QSORT(sought, nr_sought, cmp_ref_by_name);
|
|
|
|
if ((args->depth > 0 || is_repository_shallow(the_repository)) && !server_supports("shallow"))
|
|
die(_("Server does not support shallow clients"));
|
|
if (args->depth > 0 || args->deepen_since || args->deepen_not)
|
|
args->deepen = 1;
|
|
if (server_supports("multi_ack_detailed")) {
|
|
print_verbose(args, _("Server supports multi_ack_detailed"));
|
|
multi_ack = 2;
|
|
if (server_supports("no-done")) {
|
|
print_verbose(args, _("Server supports no-done"));
|
|
if (args->stateless_rpc)
|
|
no_done = 1;
|
|
}
|
|
}
|
|
else if (server_supports("multi_ack")) {
|
|
print_verbose(args, _("Server supports multi_ack"));
|
|
multi_ack = 1;
|
|
}
|
|
if (server_supports("side-band-64k")) {
|
|
print_verbose(args, _("Server supports side-band-64k"));
|
|
use_sideband = 2;
|
|
}
|
|
else if (server_supports("side-band")) {
|
|
print_verbose(args, _("Server supports side-band"));
|
|
use_sideband = 1;
|
|
}
|
|
if (server_supports("allow-tip-sha1-in-want")) {
|
|
print_verbose(args, _("Server supports allow-tip-sha1-in-want"));
|
|
allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
|
|
}
|
|
if (server_supports("allow-reachable-sha1-in-want")) {
|
|
print_verbose(args, _("Server supports allow-reachable-sha1-in-want"));
|
|
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"))
|
|
print_verbose(args, _("Server supports ofs-delta"));
|
|
else
|
|
prefer_ofs_delta = 0;
|
|
|
|
if (server_supports("filter")) {
|
|
server_supports_filtering = 1;
|
|
print_verbose(args, _("Server supports filter"));
|
|
} else if (args->filter_options.choice) {
|
|
warning("filtering not recognized by server, ignoring");
|
|
}
|
|
|
|
if ((agent_feature = server_feature_value("agent", &agent_len))) {
|
|
agent_supported = 1;
|
|
if (agent_len)
|
|
print_verbose(args, _("Server version is %.*s"),
|
|
agent_len, agent_feature);
|
|
}
|
|
if (server_supports("deepen-since"))
|
|
deepen_since_ok = 1;
|
|
else if (args->deepen_since)
|
|
die(_("Server does not support --shallow-since"));
|
|
if (server_supports("deepen-not"))
|
|
deepen_not_ok = 1;
|
|
else if (args->deepen_not)
|
|
die(_("Server does not support --shallow-exclude"));
|
|
if (!server_supports("deepen-relative") && args->deepen_relative)
|
|
die(_("Server does not support --deepen"));
|
|
|
|
if (!args->no_dependents) {
|
|
mark_complete_and_common_ref(&negotiator, args, &ref);
|
|
filter_refs(args, &ref, sought, nr_sought);
|
|
if (everything_local(args, &ref)) {
|
|
packet_flush(fd[1]);
|
|
goto all_done;
|
|
}
|
|
} else {
|
|
filter_refs(args, &ref, sought, nr_sought);
|
|
}
|
|
if (find_common(&negotiator, args, fd, &oid, 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->deepen)
|
|
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:
|
|
negotiator.release(&negotiator);
|
|
return ref;
|
|
}
|
|
|
|
static void add_shallow_requests(struct strbuf *req_buf,
|
|
const struct fetch_pack_args *args)
|
|
{
|
|
if (is_repository_shallow(the_repository))
|
|
write_shallow_commits(req_buf, 1, NULL);
|
|
if (args->depth > 0)
|
|
packet_buf_write(req_buf, "deepen %d", args->depth);
|
|
if (args->deepen_since) {
|
|
timestamp_t max_age = approxidate(args->deepen_since);
|
|
packet_buf_write(req_buf, "deepen-since %"PRItime, max_age);
|
|
}
|
|
if (args->deepen_not) {
|
|
int i;
|
|
for (i = 0; i < args->deepen_not->nr; i++) {
|
|
struct string_list_item *s = args->deepen_not->items + i;
|
|
packet_buf_write(req_buf, "deepen-not %s", s->string);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void add_wants(int no_dependents, const struct ref *wants, struct strbuf *req_buf)
|
|
{
|
|
int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0);
|
|
|
|
for ( ; wants ; wants = wants->next) {
|
|
const struct object_id *remote = &wants->old_oid;
|
|
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.
|
|
*
|
|
* Do this only if args->no_dependents is false (if it is true,
|
|
* we cannot trust the object flags).
|
|
*/
|
|
if (!no_dependents &&
|
|
((o = lookup_object(the_repository, remote->hash)) != NULL) &&
|
|
(o->flags & COMPLETE)) {
|
|
continue;
|
|
}
|
|
|
|
if (!use_ref_in_want || wants->exact_oid)
|
|
packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote));
|
|
else
|
|
packet_buf_write(req_buf, "want-ref %s\n", wants->name);
|
|
}
|
|
}
|
|
|
|
static void add_common(struct strbuf *req_buf, struct oidset *common)
|
|
{
|
|
struct oidset_iter iter;
|
|
const struct object_id *oid;
|
|
oidset_iter_init(common, &iter);
|
|
|
|
while ((oid = oidset_iter_next(&iter))) {
|
|
packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
|
|
}
|
|
}
|
|
|
|
static int add_haves(struct fetch_negotiator *negotiator,
|
|
struct strbuf *req_buf,
|
|
int *haves_to_send, int *in_vain)
|
|
{
|
|
int ret = 0;
|
|
int haves_added = 0;
|
|
const struct object_id *oid;
|
|
|
|
while ((oid = negotiator->next(negotiator))) {
|
|
packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
|
|
if (++haves_added >= *haves_to_send)
|
|
break;
|
|
}
|
|
|
|
*in_vain += haves_added;
|
|
if (!haves_added || *in_vain >= MAX_IN_VAIN) {
|
|
/* Send Done */
|
|
packet_buf_write(req_buf, "done\n");
|
|
ret = 1;
|
|
}
|
|
|
|
/* Increase haves to send on next round */
|
|
*haves_to_send = next_flush(1, *haves_to_send);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out,
|
|
const struct fetch_pack_args *args,
|
|
const struct ref *wants, struct oidset *common,
|
|
int *haves_to_send, int *in_vain)
|
|
{
|
|
int ret = 0;
|
|
struct strbuf req_buf = STRBUF_INIT;
|
|
|
|
if (server_supports_v2("fetch", 1))
|
|
packet_buf_write(&req_buf, "command=fetch");
|
|
if (server_supports_v2("agent", 0))
|
|
packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
|
|
if (args->server_options && args->server_options->nr &&
|
|
server_supports_v2("server-option", 1)) {
|
|
int i;
|
|
for (i = 0; i < args->server_options->nr; i++)
|
|
packet_write_fmt(fd_out, "server-option=%s",
|
|
args->server_options->items[i].string);
|
|
}
|
|
|
|
packet_buf_delim(&req_buf);
|
|
if (args->use_thin_pack)
|
|
packet_buf_write(&req_buf, "thin-pack");
|
|
if (args->no_progress)
|
|
packet_buf_write(&req_buf, "no-progress");
|
|
if (args->include_tag)
|
|
packet_buf_write(&req_buf, "include-tag");
|
|
if (prefer_ofs_delta)
|
|
packet_buf_write(&req_buf, "ofs-delta");
|
|
|
|
/* Add shallow-info and deepen request */
|
|
if (server_supports_feature("fetch", "shallow", 0))
|
|
add_shallow_requests(&req_buf, args);
|
|
else if (is_repository_shallow(the_repository) || args->deepen)
|
|
die(_("Server does not support shallow requests"));
|
|
|
|
/* Add filter */
|
|
if (server_supports_feature("fetch", "filter", 0) &&
|
|
args->filter_options.choice) {
|
|
print_verbose(args, _("Server supports filter"));
|
|
packet_buf_write(&req_buf, "filter %s",
|
|
args->filter_options.filter_spec);
|
|
} else if (args->filter_options.choice) {
|
|
warning("filtering not recognized by server, ignoring");
|
|
}
|
|
|
|
/* add wants */
|
|
add_wants(args->no_dependents, wants, &req_buf);
|
|
|
|
if (args->no_dependents) {
|
|
packet_buf_write(&req_buf, "done");
|
|
ret = 1;
|
|
} else {
|
|
/* Add all of the common commits we've found in previous rounds */
|
|
add_common(&req_buf, common);
|
|
|
|
/* Add initial haves */
|
|
ret = add_haves(negotiator, &req_buf, haves_to_send, in_vain);
|
|
}
|
|
|
|
/* Send request */
|
|
packet_buf_flush(&req_buf);
|
|
write_or_die(fd_out, req_buf.buf, req_buf.len);
|
|
|
|
strbuf_release(&req_buf);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Processes a section header in a server's response and checks if it matches
|
|
* `section`. If the value of `peek` is 1, the header line will be peeked (and
|
|
* not consumed); if 0, the line will be consumed and the function will die if
|
|
* the section header doesn't match what was expected.
|
|
*/
|
|
static int process_section_header(struct packet_reader *reader,
|
|
const char *section, int peek)
|
|
{
|
|
int ret;
|
|
|
|
if (packet_reader_peek(reader) != PACKET_READ_NORMAL)
|
|
die(_("error reading section header '%s'"), section);
|
|
|
|
ret = !strcmp(reader->line, section);
|
|
|
|
if (!peek) {
|
|
if (!ret)
|
|
die(_("expected '%s', received '%s'"),
|
|
section, reader->line);
|
|
packet_reader_read(reader);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int process_acks(struct fetch_negotiator *negotiator,
|
|
struct packet_reader *reader,
|
|
struct oidset *common)
|
|
{
|
|
/* received */
|
|
int received_ready = 0;
|
|
int received_ack = 0;
|
|
|
|
process_section_header(reader, "acknowledgments", 0);
|
|
while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
|
|
const char *arg;
|
|
|
|
if (!strcmp(reader->line, "NAK"))
|
|
continue;
|
|
|
|
if (skip_prefix(reader->line, "ACK ", &arg)) {
|
|
struct object_id oid;
|
|
if (!get_oid_hex(arg, &oid)) {
|
|
struct commit *commit;
|
|
oidset_insert(common, &oid);
|
|
commit = lookup_commit(the_repository, &oid);
|
|
negotiator->ack(negotiator, commit);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (!strcmp(reader->line, "ready")) {
|
|
received_ready = 1;
|
|
continue;
|
|
}
|
|
|
|
die(_("unexpected acknowledgment line: '%s'"), reader->line);
|
|
}
|
|
|
|
if (reader->status != PACKET_READ_FLUSH &&
|
|
reader->status != PACKET_READ_DELIM)
|
|
die(_("error processing acks: %d"), reader->status);
|
|
|
|
/* return 0 if no common, 1 if there are common, or 2 if ready */
|
|
return received_ready ? 2 : (received_ack ? 1 : 0);
|
|
}
|
|
|
|
static void receive_shallow_info(struct fetch_pack_args *args,
|
|
struct packet_reader *reader)
|
|
{
|
|
process_section_header(reader, "shallow-info", 0);
|
|
while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
|
|
const char *arg;
|
|
struct object_id oid;
|
|
|
|
if (skip_prefix(reader->line, "shallow ", &arg)) {
|
|
if (get_oid_hex(arg, &oid))
|
|
die(_("invalid shallow line: %s"), reader->line);
|
|
register_shallow(the_repository, &oid);
|
|
continue;
|
|
}
|
|
if (skip_prefix(reader->line, "unshallow ", &arg)) {
|
|
if (get_oid_hex(arg, &oid))
|
|
die(_("invalid unshallow line: %s"), reader->line);
|
|
if (!lookup_object(the_repository, oid.hash))
|
|
die(_("object not found: %s"), reader->line);
|
|
/* make sure that it is parsed as shallow */
|
|
if (!parse_object(the_repository, &oid))
|
|
die(_("error in object: %s"), reader->line);
|
|
if (unregister_shallow(&oid))
|
|
die(_("no shallow found: %s"), reader->line);
|
|
continue;
|
|
}
|
|
die(_("expected shallow/unshallow, got %s"), reader->line);
|
|
}
|
|
|
|
if (reader->status != PACKET_READ_FLUSH &&
|
|
reader->status != PACKET_READ_DELIM)
|
|
die(_("error processing shallow info: %d"), reader->status);
|
|
|
|
setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, NULL);
|
|
args->deepen = 1;
|
|
}
|
|
|
|
static void receive_wanted_refs(struct packet_reader *reader,
|
|
struct ref **sought, int nr_sought)
|
|
{
|
|
process_section_header(reader, "wanted-refs", 0);
|
|
while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
|
|
struct object_id oid;
|
|
const char *end;
|
|
int i;
|
|
|
|
if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ')
|
|
die(_("expected wanted-ref, got '%s'"), reader->line);
|
|
|
|
for (i = 0; i < nr_sought; i++) {
|
|
if (!strcmp(end, sought[i]->name)) {
|
|
oidcpy(&sought[i]->old_oid, &oid);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == nr_sought)
|
|
die(_("unexpected wanted-ref: '%s'"), reader->line);
|
|
}
|
|
|
|
if (reader->status != PACKET_READ_DELIM)
|
|
die(_("error processing wanted refs: %d"), reader->status);
|
|
}
|
|
|
|
enum fetch_state {
|
|
FETCH_CHECK_LOCAL = 0,
|
|
FETCH_SEND_REQUEST,
|
|
FETCH_PROCESS_ACKS,
|
|
FETCH_GET_PACK,
|
|
FETCH_DONE,
|
|
};
|
|
|
|
static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
|
|
int fd[2],
|
|
const struct ref *orig_ref,
|
|
struct ref **sought, int nr_sought,
|
|
char **pack_lockfile)
|
|
{
|
|
struct ref *ref = copy_ref_list(orig_ref);
|
|
enum fetch_state state = FETCH_CHECK_LOCAL;
|
|
struct oidset common = OIDSET_INIT;
|
|
struct packet_reader reader;
|
|
int in_vain = 0;
|
|
int haves_to_send = INITIAL_FLUSH;
|
|
struct fetch_negotiator negotiator;
|
|
fetch_negotiator_init(&negotiator, negotiation_algorithm);
|
|
packet_reader_init(&reader, fd[0], NULL, 0,
|
|
PACKET_READ_CHOMP_NEWLINE);
|
|
|
|
while (state != FETCH_DONE) {
|
|
switch (state) {
|
|
case FETCH_CHECK_LOCAL:
|
|
sort_ref_list(&ref, ref_compare_name);
|
|
QSORT(sought, nr_sought, cmp_ref_by_name);
|
|
|
|
/* v2 supports these by default */
|
|
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
|
|
use_sideband = 2;
|
|
if (args->depth > 0 || args->deepen_since || args->deepen_not)
|
|
args->deepen = 1;
|
|
|
|
/* Filter 'ref' by 'sought' and those that aren't local */
|
|
if (!args->no_dependents) {
|
|
mark_complete_and_common_ref(&negotiator, args, &ref);
|
|
filter_refs(args, &ref, sought, nr_sought);
|
|
if (everything_local(args, &ref))
|
|
state = FETCH_DONE;
|
|
else
|
|
state = FETCH_SEND_REQUEST;
|
|
|
|
mark_tips(&negotiator, args->negotiation_tips);
|
|
for_each_cached_alternate(&negotiator,
|
|
insert_one_alternate_object);
|
|
} else {
|
|
filter_refs(args, &ref, sought, nr_sought);
|
|
state = FETCH_SEND_REQUEST;
|
|
}
|
|
break;
|
|
case FETCH_SEND_REQUEST:
|
|
if (send_fetch_request(&negotiator, fd[1], args, ref,
|
|
&common,
|
|
&haves_to_send, &in_vain))
|
|
state = FETCH_GET_PACK;
|
|
else
|
|
state = FETCH_PROCESS_ACKS;
|
|
break;
|
|
case FETCH_PROCESS_ACKS:
|
|
/* Process ACKs/NAKs */
|
|
switch (process_acks(&negotiator, &reader, &common)) {
|
|
case 2:
|
|
state = FETCH_GET_PACK;
|
|
break;
|
|
case 1:
|
|
in_vain = 0;
|
|
/* fallthrough */
|
|
default:
|
|
state = FETCH_SEND_REQUEST;
|
|
break;
|
|
}
|
|
break;
|
|
case FETCH_GET_PACK:
|
|
/* Check for shallow-info section */
|
|
if (process_section_header(&reader, "shallow-info", 1))
|
|
receive_shallow_info(args, &reader);
|
|
|
|
if (process_section_header(&reader, "wanted-refs", 1))
|
|
receive_wanted_refs(&reader, sought, nr_sought);
|
|
|
|
/* get the pack */
|
|
process_section_header(&reader, "packfile", 0);
|
|
if (get_pack(args, fd, pack_lockfile))
|
|
die(_("git fetch-pack: fetch failed."));
|
|
|
|
state = FETCH_DONE;
|
|
break;
|
|
case FETCH_DONE:
|
|
continue;
|
|
}
|
|
}
|
|
|
|
negotiator.release(&negotiator);
|
|
oidset_clear(&common);
|
|
return ref;
|
|
}
|
|
|
|
static int fetch_pack_config_cb(const char *var, const char *value, void *cb)
|
|
{
|
|
if (strcmp(var, "fetch.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, "fetch.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;
|
|
}
|
|
|
|
return git_default_config(var, value, cb);
|
|
}
|
|
|
|
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_get_string("fetch.negotiationalgorithm",
|
|
&negotiation_algorithm);
|
|
|
|
git_config(fetch_pack_config_cb, 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 oid_array ref = OID_ARRAY_INIT;
|
|
int *status;
|
|
int i;
|
|
|
|
if (args->deepen && alternate_shallow_file) {
|
|
if (*alternate_shallow_file == '\0') { /* --unshallow */
|
|
unlink_or_warn(git_path_shallow(the_repository));
|
|
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 oid_array extra = OID_ARRAY_INIT;
|
|
struct object_id *oid = si->shallow->oid;
|
|
for (i = 0; i < si->shallow->nr; i++)
|
|
if (has_object_file(&oid[i]))
|
|
oid_array_append(&extra, &oid[i]);
|
|
if (extra.nr) {
|
|
setup_alternate_shallow(&shallow_lock,
|
|
&alternate_shallow_file,
|
|
&extra);
|
|
commit_lock_file(&shallow_lock);
|
|
}
|
|
oid_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++)
|
|
oid_array_append(&ref, &sought[i]->old_oid);
|
|
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 oid_array extra = OID_ARRAY_INIT;
|
|
struct object_id *oid = si->shallow->oid;
|
|
assign_shallow_commits_to_refs(si, NULL, NULL);
|
|
if (!si->nr_ours && !si->nr_theirs) {
|
|
oid_array_clear(&ref);
|
|
return;
|
|
}
|
|
for (i = 0; i < si->nr_ours; i++)
|
|
oid_array_append(&extra, &oid[si->ours[i]]);
|
|
for (i = 0; i < si->nr_theirs; i++)
|
|
oid_array_append(&extra, &oid[si->theirs[i]]);
|
|
setup_alternate_shallow(&shallow_lock,
|
|
&alternate_shallow_file,
|
|
&extra);
|
|
commit_lock_file(&shallow_lock);
|
|
oid_array_clear(&extra);
|
|
oid_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);
|
|
oid_array_clear(&ref);
|
|
}
|
|
|
|
static int iterate_ref_map(void *cb_data, struct object_id *oid)
|
|
{
|
|
struct ref **rm = cb_data;
|
|
struct ref *ref = *rm;
|
|
|
|
if (!ref)
|
|
return -1; /* end of the list */
|
|
*rm = ref->next;
|
|
oidcpy(oid, &ref->old_oid);
|
|
return 0;
|
|
}
|
|
|
|
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 oid_array *shallow,
|
|
char **pack_lockfile,
|
|
enum protocol_version version)
|
|
{
|
|
struct ref *ref_cpy;
|
|
struct shallow_info si;
|
|
|
|
fetch_pack_setup();
|
|
if (nr_sought)
|
|
nr_sought = remove_duplicates_in_refs(sought, nr_sought);
|
|
|
|
if (args->no_dependents && !args->filter_options.choice) {
|
|
/*
|
|
* The protocol does not support requesting that only the
|
|
* wanted objects be sent, so approximate this by setting a
|
|
* "blob:none" filter if no filter is already set. This works
|
|
* for all object types: note that wanted blobs will still be
|
|
* sent because they are directly specified as a "want".
|
|
*
|
|
* NEEDSWORK: Add an option in the protocol to request that
|
|
* only the wanted objects be sent, and implement it.
|
|
*/
|
|
parse_list_objects_filter(&args->filter_options, "blob:none");
|
|
}
|
|
|
|
if (version != protocol_v2 && !ref) {
|
|
packet_flush(fd[1]);
|
|
die(_("no matching remote head"));
|
|
}
|
|
prepare_shallow_info(&si, shallow);
|
|
if (version == protocol_v2)
|
|
ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
|
|
pack_lockfile);
|
|
else
|
|
ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
|
|
&si, pack_lockfile);
|
|
reprepare_packed_git(the_repository);
|
|
|
|
if (!args->cloning && args->deepen) {
|
|
struct check_connected_options opt = CHECK_CONNECTED_INIT;
|
|
struct ref *iterator = ref_cpy;
|
|
opt.shallow_file = alternate_shallow_file;
|
|
if (args->deepen)
|
|
opt.is_deepening_fetch = 1;
|
|
if (check_connected(iterate_ref_map, &iterator, &opt)) {
|
|
error(_("remote did not send all necessary objects"));
|
|
free_refs(ref_cpy);
|
|
ref_cpy = NULL;
|
|
rollback_lock_file(&shallow_lock);
|
|
goto cleanup;
|
|
}
|
|
args->connectivity_checked = 1;
|
|
}
|
|
|
|
update_shallow(args, sought, nr_sought, &si);
|
|
cleanup:
|
|
clear_shallow_info(&si);
|
|
return ref_cpy;
|
|
}
|
|
|
|
int report_unmatched_refs(struct ref **sought, int nr_sought)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
for (i = 0; i < nr_sought; i++) {
|
|
if (!sought[i])
|
|
continue;
|
|
switch (sought[i]->match_status) {
|
|
case REF_MATCHED:
|
|
continue;
|
|
case REF_NOT_MATCHED:
|
|
error(_("no such remote ref %s"), sought[i]->name);
|
|
break;
|
|
case REF_UNADVERTISED_NOT_ALLOWED:
|
|
error(_("Server does not allow request for unadvertised object %s"),
|
|
sought[i]->name);
|
|
break;
|
|
}
|
|
ret = 1;
|
|
}
|
|
return ret;
|
|
}
|