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#include "cache.h"
#include "object-store.h"
#include "run-command.h"
#include "sigchain.h"
#include "connected.h"
#include "transport.h"
#include "packfile.h"
#include "promisor-remote.h"
/*
* If we feed all the commits we want to verify to this command
*
* $ git rev-list --objects --stdin --not --all
*
* and if it does not error out, that means everything reachable from
* these commits locally exists and is connected to our existing refs.
* Note that this does _not_ validate the individual objects.
*
* Returns 0 if everything is connected, non-zero otherwise.
*/
int check_connected(oid_iterate_fn fn, void *cb_data,
struct check_connected_options *opt)
{
struct child_process rev_list = CHILD_PROCESS_INIT;
FILE *rev_list_in;
struct check_connected_options defaults = CHECK_CONNECTED_INIT;
const struct object_id *oid;
int err = 0;
struct packed_git *new_pack = NULL;
struct transport *transport;
size_t base_len;
if (!opt)
opt = &defaults;
transport = opt->transport;
oid = fn(cb_data);
if (!oid) {
if (opt->err_fd)
close(opt->err_fd);
return err;
}
if (transport && transport->smart_options &&
transport->smart_options->self_contained_and_connected &&
transport->pack_lockfiles.nr == 1 &&
strip_suffix(transport->pack_lockfiles.items[0].string,
".keep", &base_len)) {
struct strbuf idx_file = STRBUF_INIT;
strbuf_add(&idx_file, transport->pack_lockfiles.items[0].string,
base_len);
strbuf_addstr(&idx_file, ".idx");
new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
strbuf_release(&idx_file);
}
if (has_promisor_remote()) {
/*
* For partial clones, we don't want to have to do a regular
* connectivity check because we have to enumerate and exclude
* all promisor objects (slow), and then the connectivity check
* itself becomes a no-op because in a partial clone every
* object is a promisor object. Instead, just make sure we
* received, in a promisor packfile, the objects pointed to by
* each wanted ref.
*
* Before checking for promisor packs, be sure we have the
* latest pack-files loaded into memory.
*/
reprepare_packed_git(the_repository);
do {
struct packed_git *p;
for (p = get_all_packs(the_repository); p; p = p->next) {
if (!p->pack_promisor)
continue;
if (find_pack_entry_one(oid->hash, p))
goto promisor_pack_found;
}
/*
* Fallback to rev-list with oid and the rest of the
* object IDs provided by fn.
*/
goto no_promisor_pack_found;
promisor_pack_found:
;
} while ((oid = fn(cb_data)) != NULL);
return 0;
}
no_promisor_pack_found:
if (opt->shallow_file) {
strvec_push(&rev_list.args, "--shallow-file");
strvec_push(&rev_list.args, opt->shallow_file);
}
strvec_push(&rev_list.args,"rev-list");
strvec_push(&rev_list.args, "--objects");
strvec_push(&rev_list.args, "--stdin");
if (has_promisor_remote())
strvec_push(&rev_list.args, "--exclude-promisor-objects");
if (!opt->is_deepening_fetch) {
strvec_push(&rev_list.args, "--not");
strvec_push(&rev_list.args, "--all");
}
strvec_push(&rev_list.args, "--quiet");
strvec_push(&rev_list.args, "--alternate-refs");
if (opt->progress)
strvec_pushf(&rev_list.args, "--progress=%s",
_("Checking connectivity"));
rev_list.git_cmd = 1;
if (opt->env)
strvec_pushv(&rev_list.env, opt->env);
rev_list.in = -1;
rev_list.no_stdout = 1;
if (opt->err_fd)
rev_list.err = opt->err_fd;
else
rev_list.no_stderr = opt->quiet;
if (start_command(&rev_list))
return error(_("Could not run 'git rev-list'"));
sigchain_push(SIGPIPE, SIG_IGN);
rev_list_in = xfdopen(rev_list.in, "w");
do {
/*
* If index-pack already checked that:
* - there are no dangling pointers in the new pack
* - the pack is self contained
* Then if the updated ref is in the new pack, then we
* are sure the ref is good and not sending it to
* rev-list for verification.
*/
if (new_pack && find_pack_entry_one(oid->hash, new_pack))
continue;
if (fprintf(rev_list_in, "%s\n", oid_to_hex(oid)) < 0)
break;
} while ((oid = fn(cb_data)) != NULL);
if (ferror(rev_list_in) || fflush(rev_list_in)) {
if (errno != EPIPE && errno != EINVAL)
error_errno(_("failed write to rev-list"));
err = -1;
}
if (fclose(rev_list_in))
err = error_errno(_("failed to close rev-list's stdin"));
sigchain_pop(SIGPIPE);
return finish_command(&rev_list) || err;
}