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-rw-r--r--builtin-fetch-pack.c839
1 files changed, 0 insertions, 839 deletions
diff --git a/builtin-fetch-pack.c b/builtin-fetch-pack.c
deleted file mode 100644
index 629735f547..0000000000
--- a/builtin-fetch-pack.c
+++ /dev/null
@@ -1,839 +0,0 @@
-#include "cache.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"
-
-static int transfer_unpack_limit = -1;
-static int fetch_unpack_limit = -1;
-static int unpack_limit = 100;
-static int prefer_ofs_delta = 1;
-static struct fetch_pack_args args = {
- /* .uploadpack = */ "git-upload-pack",
-};
-
-static const char fetch_pack_usage[] =
-"git fetch-pack [--all] [--quiet|-q] [--keep|-k] [--thin] [--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]";
-
-#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 commit_list *rev_list;
-static int non_common_revs, multi_ack, use_sideband;
-
-static void rev_list_push(struct commit *commit, int mark)
-{
- if (!(commit->object.flags & mark)) {
- commit->object.flags |= mark;
-
- if (!(commit->object.parsed))
- if (parse_commit(commit))
- return;
-
- insert_by_date(commit, &rev_list);
-
- if (!(commit->object.flags & COMMON))
- non_common_revs++;
- }
-}
-
-static int rev_list_insert_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
-{
- struct object *o = deref_tag(parse_object(sha1), path, 0);
-
- if (o && o->type == OBJ_COMMIT)
- rev_list_push((struct commit *)o, SEEN);
-
- return 0;
-}
-
-static int clear_marks(const char *path, const unsigned char *sha1, int flag, void *cb_data)
-{
- struct object *o = deref_tag(parse_object(sha1), path, 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 == NULL || non_common_revs == 0)
- return NULL;
-
- commit = rev_list->item;
- if (!commit->object.parsed)
- 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;
- }
-
- rev_list = rev_list->next;
- }
-
- return commit->object.sha1;
-}
-
-static int find_common(int fd[2], unsigned char *result_sha1,
- struct ref *refs)
-{
- int fetching;
- int count = 0, flushes = 0, retval;
- const unsigned char *sha1;
- unsigned in_vain = 0;
- int got_continue = 0;
-
- if (marked)
- for_each_ref(clear_marks, NULL);
- marked = 1;
-
- for_each_ref(rev_list_insert_ref, NULL);
-
- fetching = 0;
- for ( ; refs ; refs = refs->next) {
- unsigned char *remote = refs->old_sha1;
- 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;
- }
-
- if (!fetching)
- packet_write(fd[1], "want %s%s%s%s%s%s%s%s\n",
- sha1_to_hex(remote),
- (multi_ack ? " multi_ack" : ""),
- (use_sideband == 2 ? " side-band-64k" : ""),
- (use_sideband == 1 ? " side-band" : ""),
- (args.use_thin_pack ? " thin-pack" : ""),
- (args.no_progress ? " no-progress" : ""),
- (args.include_tag ? " include-tag" : ""),
- (prefer_ofs_delta ? " ofs-delta" : ""));
- else
- packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
- fetching++;
- }
- if (is_repository_shallow())
- write_shallow_commits(fd[1], 1);
- if (args.depth > 0)
- packet_write(fd[1], "deepen %d", args.depth);
- packet_flush(fd[1]);
- if (!fetching)
- return 1;
-
- if (args.depth > 0) {
- char line[1024];
- unsigned char sha1[20];
-
- while (packet_read_line(fd[0], line, sizeof(line))) {
- if (!prefixcmp(line, "shallow ")) {
- if (get_sha1_hex(line + 8, sha1))
- die("invalid shallow line: %s", line);
- register_shallow(sha1);
- continue;
- }
- if (!prefixcmp(line, "unshallow ")) {
- if (get_sha1_hex(line + 10, 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);
- }
- }
-
- flushes = 0;
- retval = -1;
- while ((sha1 = get_rev())) {
- packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
- if (args.verbose)
- fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
- in_vain++;
- if (!(31 & ++count)) {
- int ack;
-
- packet_flush(fd[1]);
- flushes++;
-
- /*
- * We keep one window "ahead" of the other side, and
- * will wait for an ACK only on the next one
- */
- if (count == 32)
- continue;
-
- 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));
- if (ack == 1) {
- flushes = 0;
- multi_ack = 0;
- retval = 0;
- goto done;
- } else if (ack == 2) {
- struct commit *commit =
- lookup_commit(result_sha1);
- mark_common(commit, 0, 1);
- retval = 0;
- in_vain = 0;
- got_continue = 1;
- }
- } while (ack);
- flushes--;
- if (got_continue && MAX_IN_VAIN < in_vain) {
- if (args.verbose)
- fprintf(stderr, "giving up\n");
- break; /* give up */
- }
- }
- }
-done:
- packet_write(fd[1], "done\n");
- if (args.verbose)
- fprintf(stderr, "done\n");
- if (retval != 0) {
- multi_ack = 0;
- flushes++;
- }
- 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 == 1)
- 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 char *path, const unsigned char *sha1, int flag, void *cb_data)
-{
- 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->sha1);
- }
- if (o && o->type == OBJ_COMMIT) {
- struct commit *commit = (struct commit *)o;
- commit->object.flags |= COMPLETE;
- insert_by_date(commit, &complete);
- }
- return 0;
-}
-
-static void mark_recent_complete_commits(unsigned long cutoff)
-{
- while (complete && cutoff <= complete->item->date) {
- if (args.verbose)
- fprintf(stderr, "Marking %s as complete\n",
- sha1_to_hex(complete->item->object.sha1));
- pop_most_recent_commit(&complete, COMPLETE);
- }
-}
-
-static void filter_refs(struct ref **refs, int nr_match, char **match)
-{
- struct ref **return_refs;
- struct ref *newlist = NULL;
- struct ref **newtail = &newlist;
- struct ref *ref, *next;
- struct ref *fastarray[32];
-
- if (nr_match && !args.fetch_all) {
- if (ARRAY_SIZE(fastarray) < nr_match)
- return_refs = xcalloc(nr_match, sizeof(struct ref *));
- else {
- return_refs = fastarray;
- memset(return_refs, 0, sizeof(struct ref *) * nr_match);
- }
- }
- else
- return_refs = NULL;
-
- for (ref = *refs; ref; ref = next) {
- next = ref->next;
- if (!memcmp(ref->name, "refs/", 5) &&
- check_ref_format(ref->name + 5))
- ; /* trash */
- else if (args.fetch_all &&
- (!args.depth || prefixcmp(ref->name, "refs/tags/") )) {
- *newtail = ref;
- ref->next = NULL;
- newtail = &ref->next;
- continue;
- }
- else {
- int order = path_match(ref->name, nr_match, match);
- if (order) {
- return_refs[order-1] = ref;
- continue; /* we will link it later */
- }
- }
- free(ref);
- }
-
- if (!args.fetch_all) {
- int i;
- for (i = 0; i < nr_match; i++) {
- ref = return_refs[i];
- if (ref) {
- *newtail = ref;
- ref->next = NULL;
- newtail = &ref->next;
- }
- }
- if (return_refs != fastarray)
- free(return_refs);
- }
- *refs = newlist;
-}
-
-static int everything_local(struct ref **refs, int nr_match, char **match)
-{
- struct ref *ref;
- int retval;
- unsigned long cutoff = 0;
-
- save_commit_buffer = 0;
-
- for (ref = *refs; ref; ref = ref->next) {
- struct object *o;
-
- o = parse_object(ref->old_sha1);
- 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, NULL);
- if (cutoff)
- mark_recent_complete_commits(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_sha1),
- 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(refs, nr_match, match);
-
- for (retval = 1, ref = *refs; ref ; ref = ref->next) {
- const unsigned char *remote = ref->old_sha1;
- unsigned char local[20];
- 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;
- }
-
- hashcpy(ref->new_sha1, local);
- if (!args.verbose)
- continue;
- fprintf(stderr,
- "already have %s (%s)\n", sha1_to_hex(remote),
- ref->name);
- }
- return retval;
-}
-
-static int sideband_demux(int fd, void *data)
-{
- int *xd = data;
-
- int ret = recv_sideband("fetch-pack", xd[0], fd);
- close(fd);
- return ret;
-}
-
-static int get_pack(int xd[2], char **pack_lockfile)
-{
- struct async demux;
- const char *argv[20];
- char keep_arg[256];
- char hdr_arg[256];
- const char **av;
- int do_keep = args.keep_pack;
- struct child_process cmd;
-
- 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;
- if (start_async(&demux))
- die("fetch-pack: unable to fork off sideband"
- " demultiplexer");
- }
- else
- demux.out = xd[0];
-
- memset(&cmd, 0, sizeof(cmd));
- cmd.argv = argv;
- av = argv;
- *hdr_arg = 0;
- if (!args.keep_pack && unpack_limit) {
- struct pack_header header;
-
- if (read_pack_header(demux.out, &header))
- die("protocol error: bad pack header");
- snprintf(hdr_arg, sizeof(hdr_arg),
- "--pack_header=%"PRIu32",%"PRIu32,
- ntohl(header.hdr_version), ntohl(header.hdr_entries));
- if (ntohl(header.hdr_entries) < unpack_limit)
- do_keep = 0;
- else
- do_keep = 1;
- }
-
- if (do_keep) {
- if (pack_lockfile)
- cmd.out = -1;
- *av++ = "index-pack";
- *av++ = "--stdin";
- if (!args.quiet && !args.no_progress)
- *av++ = "-v";
- if (args.use_thin_pack)
- *av++ = "--fix-thin";
- if (args.lock_pack || unpack_limit) {
- int s = sprintf(keep_arg,
- "--keep=fetch-pack %"PRIuMAX " on ", (uintmax_t) getpid());
- if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
- strcpy(keep_arg + s, "localhost");
- *av++ = keep_arg;
- }
- }
- else {
- *av++ = "unpack-objects";
- if (args.quiet)
- *av++ = "-q";
- }
- if (*hdr_arg)
- *av++ = hdr_arg;
- *av++ = NULL;
-
- cmd.in = demux.out;
- cmd.git_cmd = 1;
- if (start_command(&cmd))
- die("fetch-pack: unable to fork off %s", argv[0]);
- if (do_keep && pack_lockfile) {
- *pack_lockfile = index_pack_lockfile(cmd.out);
- close(cmd.out);
- }
-
- if (finish_command(&cmd))
- die("%s failed", argv[0]);
- if (use_sideband && finish_async(&demux))
- die("error in sideband demultiplexer");
- return 0;
-}
-
-static struct ref *do_fetch_pack(int fd[2],
- const struct ref *orig_ref,
- int nr_match,
- char **match,
- char **pack_lockfile)
-{
- struct ref *ref = copy_ref_list(orig_ref);
- unsigned char sha1[20];
-
- if (is_repository_shallow() && !server_supports("shallow"))
- die("Server does not support shallow clients");
- 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("ofs-delta")) {
- if (args.verbose)
- fprintf(stderr, "Server supports ofs-delta\n");
- } else
- prefer_ofs_delta = 0;
- if (everything_local(&ref, nr_match, match)) {
- packet_flush(fd[1]);
- goto all_done;
- }
- if (find_common(fd, sha1, ref) < 0)
- if (!args.keep_pack)
- /* When cloning, it is not unusual to have
- * no common commit.
- */
- warning("no common commits");
-
- if (get_pack(fd, pack_lockfile))
- die("git fetch-pack: fetch failed.");
-
- all_done:
- return ref;
-}
-
-static int remove_duplicates(int nr_heads, char **heads)
-{
- int src, dst;
-
- for (src = dst = 0; src < nr_heads; src++) {
- /* If heads[src] is different from any of
- * heads[0..dst], push it in.
- */
- int i;
- for (i = 0; i < dst; i++) {
- if (!strcmp(heads[i], heads[src]))
- break;
- }
- if (i < dst)
- continue;
- if (src != dst)
- heads[dst] = heads[src];
- dst++;
- }
- return dst;
-}
-
-static int fetch_pack_config(const char *var, const char *value, void *cb)
-{
- if (strcmp(var, "fetch.unpacklimit") == 0) {
- fetch_unpack_limit = git_config_int(var, value);
- return 0;
- }
-
- if (strcmp(var, "transfer.unpacklimit") == 0) {
- transfer_unpack_limit = git_config_int(var, value);
- return 0;
- }
-
- if (strcmp(var, "repack.usedeltabaseoffset") == 0) {
- prefer_ofs_delta = git_config_bool(var, value);
- return 0;
- }
-
- return git_default_config(var, value, cb);
-}
-
-static struct lock_file lock;
-
-static void fetch_pack_setup(void)
-{
- static int did_setup;
- if (did_setup)
- return;
- git_config(fetch_pack_config, NULL);
- if (0 <= transfer_unpack_limit)
- unpack_limit = transfer_unpack_limit;
- else if (0 <= fetch_unpack_limit)
- unpack_limit = fetch_unpack_limit;
- did_setup = 1;
-}
-
-int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
-{
- int i, ret, nr_heads;
- struct ref *ref = NULL;
- char *dest = NULL, **heads;
- int fd[2];
- struct child_process *conn;
-
- nr_heads = 0;
- heads = NULL;
- for (i = 1; i < argc; i++) {
- const char *arg = argv[i];
-
- if (*arg == '-') {
- if (!prefixcmp(arg, "--upload-pack=")) {
- args.uploadpack = arg + 14;
- continue;
- }
- if (!prefixcmp(arg, "--exec=")) {
- args.uploadpack = arg + 7;
- continue;
- }
- if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
- args.quiet = 1;
- continue;
- }
- if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
- args.lock_pack = args.keep_pack;
- args.keep_pack = 1;
- continue;
- }
- if (!strcmp("--thin", arg)) {
- args.use_thin_pack = 1;
- continue;
- }
- if (!strcmp("--include-tag", arg)) {
- args.include_tag = 1;
- continue;
- }
- if (!strcmp("--all", arg)) {
- args.fetch_all = 1;
- continue;
- }
- if (!strcmp("-v", arg)) {
- args.verbose = 1;
- continue;
- }
- if (!prefixcmp(arg, "--depth=")) {
- args.depth = strtol(arg + 8, NULL, 0);
- continue;
- }
- if (!strcmp("--no-progress", arg)) {
- args.no_progress = 1;
- continue;
- }
- usage(fetch_pack_usage);
- }
- dest = (char *)arg;
- heads = (char **)(argv + i + 1);
- nr_heads = argc - i - 1;
- break;
- }
- if (!dest)
- usage(fetch_pack_usage);
-
- conn = git_connect(fd, (char *)dest, args.uploadpack,
- args.verbose ? CONNECT_VERBOSE : 0);
- if (conn) {
- get_remote_heads(fd[0], &ref, 0, NULL, 0, NULL);
-
- ref = fetch_pack(&args, fd, conn, ref, dest, nr_heads, heads, NULL);
- close(fd[0]);
- close(fd[1]);
- if (finish_connect(conn))
- ref = NULL;
- } else {
- ref = NULL;
- }
- ret = !ref;
-
- if (!ret && nr_heads) {
- /* If the heads to pull were given, we should have
- * consumed all of them by matching the remote.
- * Otherwise, 'git fetch remote no-such-ref' would
- * silently succeed without issuing an error.
- */
- for (i = 0; i < nr_heads; i++)
- if (heads[i] && heads[i][0]) {
- error("no such remote ref %s", heads[i]);
- ret = 1;
- }
- }
- while (ref) {
- printf("%s %s\n",
- sha1_to_hex(ref->old_sha1), ref->name);
- ref = ref->next;
- }
-
- return ret;
-}
-
-struct ref *fetch_pack(struct fetch_pack_args *my_args,
- int fd[], struct child_process *conn,
- const struct ref *ref,
- const char *dest,
- int nr_heads,
- char **heads,
- char **pack_lockfile)
-{
- struct stat st;
- struct ref *ref_cpy;
-
- fetch_pack_setup();
- if (&args != my_args)
- memcpy(&args, my_args, sizeof(args));
- if (args.depth > 0) {
- if (stat(git_path("shallow"), &st))
- st.st_mtime = 0;
- }
-
- if (heads && nr_heads)
- nr_heads = remove_duplicates(nr_heads, heads);
- if (!ref) {
- packet_flush(fd[1]);
- die("no matching remote head");
- }
- ref_cpy = do_fetch_pack(fd, ref, nr_heads, heads, pack_lockfile);
-
- if (args.depth > 0) {
- struct cache_time mtime;
- char *shallow = git_path("shallow");
- int fd;
-
- mtime.sec = st.st_mtime;
- mtime.nsec = ST_MTIME_NSEC(st);
- if (stat(shallow, &st)) {
- if (mtime.sec)
- die("shallow file was removed during fetch");
- } else if (st.st_mtime != mtime.sec
-#ifdef USE_NSEC
- || ST_MTIME_NSEC(st) != mtime.nsec
-#endif
- )
- die("shallow file was changed during fetch");
-
- fd = hold_lock_file_for_update(&lock, shallow,
- LOCK_DIE_ON_ERROR);
- if (!write_shallow_commits(fd, 0)) {
- unlink_or_warn(shallow);
- rollback_lock_file(&lock);
- } else {
- commit_lock_file(&lock);
- }
- }
-
- reprepare_packed_git();
- return ref_cpy;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 10:36:43 +0000