merge(third_party/git): Merge squashed git subtree at v2.23.0
Merge commit '1b593e1ea4' as 'third_party/git'
This commit is contained in:
Vincent Ambo
commit
7ef0d62730
3629 changed files with 1139935 additions and 0 deletions
627
third_party/git/send-pack.c
vendored
Normal file
627
third_party/git/send-pack.c
vendored
Normal file
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@ -0,0 +1,627 @@
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#include "builtin.h"
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#include "config.h"
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#include "commit.h"
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#include "refs.h"
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#include "object-store.h"
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#include "pkt-line.h"
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#include "sideband.h"
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#include "run-command.h"
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#include "remote.h"
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#include "connect.h"
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#include "send-pack.h"
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#include "quote.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 "gpg-interface.h"
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#include "cache.h"
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int option_parse_push_signed(const struct option *opt,
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const char *arg, int unset)
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{
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if (unset) {
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*(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
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return 0;
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}
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switch (git_parse_maybe_bool(arg)) {
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case 1:
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*(int *)(opt->value) = SEND_PACK_PUSH_CERT_ALWAYS;
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return 0;
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case 0:
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*(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
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return 0;
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}
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if (!strcasecmp("if-asked", arg)) {
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*(int *)(opt->value) = SEND_PACK_PUSH_CERT_IF_ASKED;
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return 0;
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}
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die("bad %s argument: %s", opt->long_name, arg);
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}
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static void feed_object(const struct object_id *oid, FILE *fh, int negative)
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{
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if (negative && !has_object_file(oid))
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return;
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if (negative)
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putc('^', fh);
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fputs(oid_to_hex(oid), fh);
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putc('\n', fh);
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}
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/*
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* Make a pack stream and spit it out into file descriptor fd
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*/
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static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struct send_pack_args *args)
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{
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/*
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* The child becomes pack-objects --revs; we feed
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* the revision parameters to it via its stdin and
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* let its stdout go back to the other end.
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*/
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struct child_process po = CHILD_PROCESS_INIT;
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FILE *po_in;
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int i;
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int rc;
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argv_array_push(&po.args, "pack-objects");
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argv_array_push(&po.args, "--all-progress-implied");
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argv_array_push(&po.args, "--revs");
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argv_array_push(&po.args, "--stdout");
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if (args->use_thin_pack)
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argv_array_push(&po.args, "--thin");
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if (args->use_ofs_delta)
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argv_array_push(&po.args, "--delta-base-offset");
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if (args->quiet || !args->progress)
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argv_array_push(&po.args, "-q");
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if (args->progress)
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argv_array_push(&po.args, "--progress");
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if (is_repository_shallow(the_repository))
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argv_array_push(&po.args, "--shallow");
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po.in = -1;
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po.out = args->stateless_rpc ? -1 : fd;
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po.git_cmd = 1;
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if (start_command(&po))
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die_errno("git pack-objects failed");
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/*
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* We feed the pack-objects we just spawned with revision
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* parameters by writing to the pipe.
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*/
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po_in = xfdopen(po.in, "w");
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for (i = 0; i < extra->nr; i++)
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feed_object(&extra->oid[i], po_in, 1);
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while (refs) {
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if (!is_null_oid(&refs->old_oid))
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feed_object(&refs->old_oid, po_in, 1);
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if (!is_null_oid(&refs->new_oid))
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feed_object(&refs->new_oid, po_in, 0);
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refs = refs->next;
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}
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fflush(po_in);
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if (ferror(po_in))
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die_errno("error writing to pack-objects");
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fclose(po_in);
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if (args->stateless_rpc) {
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char *buf = xmalloc(LARGE_PACKET_MAX);
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while (1) {
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ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
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if (n <= 0)
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||||
break;
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send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
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}
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free(buf);
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close(po.out);
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||||
po.out = -1;
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}
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rc = finish_command(&po);
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if (rc) {
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||||
/*
|
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* For a normal non-zero exit, we assume pack-objects wrote
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||||
* something useful to stderr. For death by signal, though,
|
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* we should mention it to the user. The exception is SIGPIPE
|
||||
* (141), because that's a normal occurrence if the remote end
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||||
* hangs up (and we'll report that by trying to read the unpack
|
||||
* status).
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||||
*/
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if (rc > 128 && rc != 141)
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error("pack-objects died of signal %d", rc - 128);
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return -1;
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||||
}
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||||
return 0;
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||||
}
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||||
static int receive_unpack_status(struct packet_reader *reader)
|
||||
{
|
||||
if (packet_reader_read(reader) != PACKET_READ_NORMAL)
|
||||
return error(_("unexpected flush packet while reading remote unpack status"));
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||||
if (!skip_prefix(reader->line, "unpack ", &reader->line))
|
||||
return error(_("unable to parse remote unpack status: %s"), reader->line);
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||||
if (strcmp(reader->line, "ok"))
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return error(_("remote unpack failed: %s"), reader->line);
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return 0;
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}
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||||
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static int receive_status(struct packet_reader *reader, struct ref *refs)
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{
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struct ref *hint;
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int ret;
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||||
hint = NULL;
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||||
ret = receive_unpack_status(reader);
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||||
while (1) {
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||||
const char *refname;
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||||
char *msg;
|
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if (packet_reader_read(reader) != PACKET_READ_NORMAL)
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||||
break;
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||||
if (!starts_with(reader->line, "ok ") && !starts_with(reader->line, "ng ")) {
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error("invalid ref status from remote: %s", reader->line);
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||||
ret = -1;
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||||
break;
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||||
}
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||||
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refname = reader->line + 3;
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msg = strchr(refname, ' ');
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||||
if (msg)
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*msg++ = '\0';
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||||
/* first try searching at our hint, falling back to all refs */
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||||
if (hint)
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||||
hint = find_ref_by_name(hint, refname);
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||||
if (!hint)
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||||
hint = find_ref_by_name(refs, refname);
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||||
if (!hint) {
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||||
warning("remote reported status on unknown ref: %s",
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||||
refname);
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continue;
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||||
}
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||||
if (hint->status != REF_STATUS_EXPECTING_REPORT) {
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warning("remote reported status on unexpected ref: %s",
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||||
refname);
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||||
continue;
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||||
}
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||||
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||||
if (reader->line[0] == 'o' && reader->line[1] == 'k')
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||||
hint->status = REF_STATUS_OK;
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||||
else {
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||||
hint->status = REF_STATUS_REMOTE_REJECT;
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ret = -1;
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||||
}
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||||
hint->remote_status = xstrdup_or_null(msg);
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/* start our next search from the next ref */
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hint = hint->next;
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}
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return ret;
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}
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static int sideband_demux(int in, int out, void *data)
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||||
{
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int *fd = data, ret;
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if (async_with_fork())
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close(fd[1]);
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ret = recv_sideband("send-pack", fd[0], out);
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close(out);
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return ret;
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}
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static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
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{
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struct strbuf *sb = cb;
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if (graft->nr_parent == -1)
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packet_buf_write(sb, "shallow %s\n", oid_to_hex(&graft->oid));
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return 0;
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}
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static void advertise_shallow_grafts_buf(struct strbuf *sb)
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{
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if (!is_repository_shallow(the_repository))
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return;
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for_each_commit_graft(advertise_shallow_grafts_cb, sb);
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}
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#define CHECK_REF_NO_PUSH -1
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#define CHECK_REF_STATUS_REJECTED -2
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#define CHECK_REF_UPTODATE -3
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static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args)
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{
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if (!ref->peer_ref && !args->send_mirror)
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return CHECK_REF_NO_PUSH;
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/* Check for statuses set by set_ref_status_for_push() */
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switch (ref->status) {
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case REF_STATUS_REJECT_NONFASTFORWARD:
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||||
case REF_STATUS_REJECT_ALREADY_EXISTS:
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||||
case REF_STATUS_REJECT_FETCH_FIRST:
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case REF_STATUS_REJECT_NEEDS_FORCE:
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case REF_STATUS_REJECT_STALE:
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case REF_STATUS_REJECT_NODELETE:
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return CHECK_REF_STATUS_REJECTED;
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case REF_STATUS_UPTODATE:
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return CHECK_REF_UPTODATE;
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default:
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return 0;
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}
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}
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||||
/*
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||||
* the beginning of the next line, or the end of buffer.
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*
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||||
* NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
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||||
* convert many similar uses found by "git grep -A4 memchr".
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||||
*/
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||||
static const char *next_line(const char *line, size_t len)
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||||
{
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const char *nl = memchr(line, '\n', len);
|
||||
if (!nl)
|
||||
return line + len; /* incomplete line */
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||||
return nl + 1;
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}
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static int generate_push_cert(struct strbuf *req_buf,
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||||
const struct ref *remote_refs,
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||||
struct send_pack_args *args,
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const char *cap_string,
|
||||
const char *push_cert_nonce)
|
||||
{
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||||
const struct ref *ref;
|
||||
struct string_list_item *item;
|
||||
char *signing_key = xstrdup(get_signing_key());
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const char *cp, *np;
|
||||
struct strbuf cert = STRBUF_INIT;
|
||||
int update_seen = 0;
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||||
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||||
strbuf_addstr(&cert, "certificate version 0.1\n");
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||||
strbuf_addf(&cert, "pusher %s ", signing_key);
|
||||
datestamp(&cert);
|
||||
strbuf_addch(&cert, '\n');
|
||||
if (args->url && *args->url) {
|
||||
char *anon_url = transport_anonymize_url(args->url);
|
||||
strbuf_addf(&cert, "pushee %s\n", anon_url);
|
||||
free(anon_url);
|
||||
}
|
||||
if (push_cert_nonce[0])
|
||||
strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
|
||||
if (args->push_options)
|
||||
for_each_string_list_item(item, args->push_options)
|
||||
strbuf_addf(&cert, "push-option %s\n", item->string);
|
||||
strbuf_addstr(&cert, "\n");
|
||||
|
||||
for (ref = remote_refs; ref; ref = ref->next) {
|
||||
if (check_to_send_update(ref, args) < 0)
|
||||
continue;
|
||||
update_seen = 1;
|
||||
strbuf_addf(&cert, "%s %s %s\n",
|
||||
oid_to_hex(&ref->old_oid),
|
||||
oid_to_hex(&ref->new_oid),
|
||||
ref->name);
|
||||
}
|
||||
if (!update_seen)
|
||||
goto free_return;
|
||||
|
||||
if (sign_buffer(&cert, &cert, signing_key))
|
||||
die(_("failed to sign the push certificate"));
|
||||
|
||||
packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
|
||||
for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
|
||||
np = next_line(cp, cert.buf + cert.len - cp);
|
||||
packet_buf_write(req_buf,
|
||||
"%.*s", (int)(np - cp), cp);
|
||||
}
|
||||
packet_buf_write(req_buf, "push-cert-end\n");
|
||||
|
||||
free_return:
|
||||
free(signing_key);
|
||||
strbuf_release(&cert);
|
||||
return update_seen;
|
||||
}
|
||||
|
||||
|
||||
static int atomic_push_failure(struct send_pack_args *args,
|
||||
struct ref *remote_refs,
|
||||
struct ref *failing_ref)
|
||||
{
|
||||
struct ref *ref;
|
||||
/* Mark other refs as failed */
|
||||
for (ref = remote_refs; ref; ref = ref->next) {
|
||||
if (!ref->peer_ref && !args->send_mirror)
|
||||
continue;
|
||||
|
||||
switch (ref->status) {
|
||||
case REF_STATUS_EXPECTING_REPORT:
|
||||
ref->status = REF_STATUS_ATOMIC_PUSH_FAILED;
|
||||
continue;
|
||||
default:
|
||||
break; /* do nothing */
|
||||
}
|
||||
}
|
||||
return error("atomic push failed for ref %s. status: %d\n",
|
||||
failing_ref->name, failing_ref->status);
|
||||
}
|
||||
|
||||
#define NONCE_LEN_LIMIT 256
|
||||
|
||||
static void reject_invalid_nonce(const char *nonce, int len)
|
||||
{
|
||||
int i = 0;
|
||||
|
||||
if (NONCE_LEN_LIMIT <= len)
|
||||
die("the receiving end asked to sign an invalid nonce <%.*s>",
|
||||
len, nonce);
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
int ch = nonce[i] & 0xFF;
|
||||
if (isalnum(ch) ||
|
||||
ch == '-' || ch == '.' ||
|
||||
ch == '/' || ch == '+' ||
|
||||
ch == '=' || ch == '_')
|
||||
continue;
|
||||
die("the receiving end asked to sign an invalid nonce <%.*s>",
|
||||
len, nonce);
|
||||
}
|
||||
}
|
||||
|
||||
int send_pack(struct send_pack_args *args,
|
||||
int fd[], struct child_process *conn,
|
||||
struct ref *remote_refs,
|
||||
struct oid_array *extra_have)
|
||||
{
|
||||
int in = fd[0];
|
||||
int out = fd[1];
|
||||
struct strbuf req_buf = STRBUF_INIT;
|
||||
struct strbuf cap_buf = STRBUF_INIT;
|
||||
struct ref *ref;
|
||||
int need_pack_data = 0;
|
||||
int allow_deleting_refs = 0;
|
||||
int status_report = 0;
|
||||
int use_sideband = 0;
|
||||
int quiet_supported = 0;
|
||||
int agent_supported = 0;
|
||||
int use_atomic = 0;
|
||||
int atomic_supported = 0;
|
||||
int use_push_options = 0;
|
||||
int push_options_supported = 0;
|
||||
unsigned cmds_sent = 0;
|
||||
int ret;
|
||||
struct async demux;
|
||||
const char *push_cert_nonce = NULL;
|
||||
struct packet_reader reader;
|
||||
|
||||
/* Does the other end support the reporting? */
|
||||
if (server_supports("report-status"))
|
||||
status_report = 1;
|
||||
if (server_supports("delete-refs"))
|
||||
allow_deleting_refs = 1;
|
||||
if (server_supports("ofs-delta"))
|
||||
args->use_ofs_delta = 1;
|
||||
if (server_supports("side-band-64k"))
|
||||
use_sideband = 1;
|
||||
if (server_supports("quiet"))
|
||||
quiet_supported = 1;
|
||||
if (server_supports("agent"))
|
||||
agent_supported = 1;
|
||||
if (server_supports("no-thin"))
|
||||
args->use_thin_pack = 0;
|
||||
if (server_supports("atomic"))
|
||||
atomic_supported = 1;
|
||||
if (server_supports("push-options"))
|
||||
push_options_supported = 1;
|
||||
|
||||
if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
|
||||
int len;
|
||||
push_cert_nonce = server_feature_value("push-cert", &len);
|
||||
if (push_cert_nonce) {
|
||||
reject_invalid_nonce(push_cert_nonce, len);
|
||||
push_cert_nonce = xmemdupz(push_cert_nonce, len);
|
||||
} else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
|
||||
die(_("the receiving end does not support --signed push"));
|
||||
} else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
|
||||
warning(_("not sending a push certificate since the"
|
||||
" receiving end does not support --signed"
|
||||
" push"));
|
||||
}
|
||||
}
|
||||
|
||||
if (!remote_refs) {
|
||||
fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
|
||||
"Perhaps you should specify a branch such as 'master'.\n");
|
||||
return 0;
|
||||
}
|
||||
if (args->atomic && !atomic_supported)
|
||||
die(_("the receiving end does not support --atomic push"));
|
||||
|
||||
use_atomic = atomic_supported && args->atomic;
|
||||
|
||||
if (args->push_options && !push_options_supported)
|
||||
die(_("the receiving end does not support push options"));
|
||||
|
||||
use_push_options = push_options_supported && args->push_options;
|
||||
|
||||
if (status_report)
|
||||
strbuf_addstr(&cap_buf, " report-status");
|
||||
if (use_sideband)
|
||||
strbuf_addstr(&cap_buf, " side-band-64k");
|
||||
if (quiet_supported && (args->quiet || !args->progress))
|
||||
strbuf_addstr(&cap_buf, " quiet");
|
||||
if (use_atomic)
|
||||
strbuf_addstr(&cap_buf, " atomic");
|
||||
if (use_push_options)
|
||||
strbuf_addstr(&cap_buf, " push-options");
|
||||
if (agent_supported)
|
||||
strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
|
||||
|
||||
/*
|
||||
* NEEDSWORK: why does delete-refs have to be so specific to
|
||||
* send-pack machinery that set_ref_status_for_push() cannot
|
||||
* set this bit for us???
|
||||
*/
|
||||
for (ref = remote_refs; ref; ref = ref->next)
|
||||
if (ref->deletion && !allow_deleting_refs)
|
||||
ref->status = REF_STATUS_REJECT_NODELETE;
|
||||
|
||||
if (!args->dry_run)
|
||||
advertise_shallow_grafts_buf(&req_buf);
|
||||
|
||||
if (!args->dry_run && push_cert_nonce)
|
||||
cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
|
||||
cap_buf.buf, push_cert_nonce);
|
||||
|
||||
/*
|
||||
* Clear the status for each ref and see if we need to send
|
||||
* the pack data.
|
||||
*/
|
||||
for (ref = remote_refs; ref; ref = ref->next) {
|
||||
switch (check_to_send_update(ref, args)) {
|
||||
case 0: /* no error */
|
||||
break;
|
||||
case CHECK_REF_STATUS_REJECTED:
|
||||
/*
|
||||
* When we know the server would reject a ref update if
|
||||
* we were to send it and we're trying to send the refs
|
||||
* atomically, abort the whole operation.
|
||||
*/
|
||||
if (use_atomic) {
|
||||
strbuf_release(&req_buf);
|
||||
strbuf_release(&cap_buf);
|
||||
return atomic_push_failure(args, remote_refs, ref);
|
||||
}
|
||||
/* else fallthrough */
|
||||
default:
|
||||
continue;
|
||||
}
|
||||
if (!ref->deletion)
|
||||
need_pack_data = 1;
|
||||
|
||||
if (args->dry_run || !status_report)
|
||||
ref->status = REF_STATUS_OK;
|
||||
else
|
||||
ref->status = REF_STATUS_EXPECTING_REPORT;
|
||||
}
|
||||
|
||||
/*
|
||||
* Finally, tell the other end!
|
||||
*/
|
||||
for (ref = remote_refs; ref; ref = ref->next) {
|
||||
char *old_hex, *new_hex;
|
||||
|
||||
if (args->dry_run || push_cert_nonce)
|
||||
continue;
|
||||
|
||||
if (check_to_send_update(ref, args) < 0)
|
||||
continue;
|
||||
|
||||
old_hex = oid_to_hex(&ref->old_oid);
|
||||
new_hex = oid_to_hex(&ref->new_oid);
|
||||
if (!cmds_sent) {
|
||||
packet_buf_write(&req_buf,
|
||||
"%s %s %s%c%s",
|
||||
old_hex, new_hex, ref->name, 0,
|
||||
cap_buf.buf);
|
||||
cmds_sent = 1;
|
||||
} else {
|
||||
packet_buf_write(&req_buf, "%s %s %s",
|
||||
old_hex, new_hex, ref->name);
|
||||
}
|
||||
}
|
||||
|
||||
if (use_push_options) {
|
||||
struct string_list_item *item;
|
||||
|
||||
packet_buf_flush(&req_buf);
|
||||
for_each_string_list_item(item, args->push_options)
|
||||
packet_buf_write(&req_buf, "%s", item->string);
|
||||
}
|
||||
|
||||
if (args->stateless_rpc) {
|
||||
if (!args->dry_run && (cmds_sent || is_repository_shallow(the_repository))) {
|
||||
packet_buf_flush(&req_buf);
|
||||
send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
|
||||
}
|
||||
} else {
|
||||
write_or_die(out, req_buf.buf, req_buf.len);
|
||||
packet_flush(out);
|
||||
}
|
||||
strbuf_release(&req_buf);
|
||||
strbuf_release(&cap_buf);
|
||||
|
||||
if (use_sideband && cmds_sent) {
|
||||
memset(&demux, 0, sizeof(demux));
|
||||
demux.proc = sideband_demux;
|
||||
demux.data = fd;
|
||||
demux.out = -1;
|
||||
demux.isolate_sigpipe = 1;
|
||||
if (start_async(&demux))
|
||||
die("send-pack: unable to fork off sideband demultiplexer");
|
||||
in = demux.out;
|
||||
}
|
||||
|
||||
packet_reader_init(&reader, in, NULL, 0,
|
||||
PACKET_READ_CHOMP_NEWLINE |
|
||||
PACKET_READ_DIE_ON_ERR_PACKET);
|
||||
|
||||
if (need_pack_data && cmds_sent) {
|
||||
if (pack_objects(out, remote_refs, extra_have, args) < 0) {
|
||||
for (ref = remote_refs; ref; ref = ref->next)
|
||||
ref->status = REF_STATUS_NONE;
|
||||
if (args->stateless_rpc)
|
||||
close(out);
|
||||
if (git_connection_is_socket(conn))
|
||||
shutdown(fd[0], SHUT_WR);
|
||||
|
||||
/*
|
||||
* Do not even bother with the return value; we know we
|
||||
* are failing, and just want the error() side effects.
|
||||
*/
|
||||
if (status_report)
|
||||
receive_unpack_status(&reader);
|
||||
|
||||
if (use_sideband) {
|
||||
close(demux.out);
|
||||
finish_async(&demux);
|
||||
}
|
||||
fd[1] = -1;
|
||||
return -1;
|
||||
}
|
||||
if (!args->stateless_rpc)
|
||||
/* Closed by pack_objects() via start_command() */
|
||||
fd[1] = -1;
|
||||
}
|
||||
if (args->stateless_rpc && cmds_sent)
|
||||
packet_flush(out);
|
||||
|
||||
if (status_report && cmds_sent)
|
||||
ret = receive_status(&reader, remote_refs);
|
||||
else
|
||||
ret = 0;
|
||||
if (args->stateless_rpc)
|
||||
packet_flush(out);
|
||||
|
||||
if (use_sideband && cmds_sent) {
|
||||
close(demux.out);
|
||||
if (finish_async(&demux)) {
|
||||
error("error in sideband demultiplexer");
|
||||
ret = -1;
|
||||
}
|
||||
}
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (args->porcelain)
|
||||
return 0;
|
||||
|
||||
for (ref = remote_refs; ref; ref = ref->next) {
|
||||
switch (ref->status) {
|
||||
case REF_STATUS_NONE:
|
||||
case REF_STATUS_UPTODATE:
|
||||
case REF_STATUS_OK:
|
||||
break;
|
||||
default:
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue