diff options
Diffstat (limited to 'third_party/git/connected.c')
| -rw-r--r-- | third_party/git/connected.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/third_party/git/connected.c b/third_party/git/connected.c new file mode 100644 index 000000000000..cd9b324afa5a --- /dev/null +++ b/third_party/git/connected.c @@ -0,0 +1,129 @@ +#include "cache.h" +#include "object-store.h" +#include "run-command.h" +#include "sigchain.h" +#include "connected.h" +#include "transport.h" +#include "packfile.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; + struct check_connected_options defaults = CHECK_CONNECTED_INIT; + char commit[GIT_MAX_HEXSZ + 1]; + 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; + + if (fn(cb_data, &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_lockfile && + strip_suffix(transport->pack_lockfile, ".keep", &base_len)) { + struct strbuf idx_file = STRBUF_INIT; + strbuf_add(&idx_file, transport->pack_lockfile, base_len); + strbuf_addstr(&idx_file, ".idx"); + new_pack = add_packed_git(idx_file.buf, idx_file.len, 1); + strbuf_release(&idx_file); + } + + if (opt->check_refs_only) { + /* + * 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 the objects pointed to by each wanted ref. + */ + do { + if (!repo_has_object_file(the_repository, &oid)) + return 1; + } while (!fn(cb_data, &oid)); + return 0; + } + + if (opt->shallow_file) { + argv_array_push(&rev_list.args, "--shallow-file"); + argv_array_push(&rev_list.args, opt->shallow_file); + } + argv_array_push(&rev_list.args,"rev-list"); + argv_array_push(&rev_list.args, "--objects"); + argv_array_push(&rev_list.args, "--stdin"); + if (repository_format_partial_clone) + argv_array_push(&rev_list.args, "--exclude-promisor-objects"); + if (!opt->is_deepening_fetch) { + argv_array_push(&rev_list.args, "--not"); + argv_array_push(&rev_list.args, "--all"); + } + argv_array_push(&rev_list.args, "--quiet"); + argv_array_push(&rev_list.args, "--alternate-refs"); + if (opt->progress) + argv_array_pushf(&rev_list.args, "--progress=%s", + _("Checking connectivity")); + + rev_list.git_cmd = 1; + 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); + + commit[GIT_SHA1_HEXSZ] = '\n'; + 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; + + memcpy(commit, oid_to_hex(&oid), GIT_SHA1_HEXSZ); + if (write_in_full(rev_list.in, commit, GIT_SHA1_HEXSZ + 1) < 0) { + if (errno != EPIPE && errno != EINVAL) + error_errno(_("failed write to rev-list")); + err = -1; + break; + } + } while (!fn(cb_data, &oid)); + + if (close(rev_list.in)) + err = error_errno(_("failed to close rev-list's stdin")); + + sigchain_pop(SIGPIPE); + return finish_command(&rev_list) || err; +} |