Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "object-store.h"
   3#include "run-command.h"
   4#include "sigchain.h"
   5#include "connected.h"
   6#include "transport.h"
   7#include "packfile.h"
   8#include "promisor-remote.h"
   9
  10/*
  11 * If we feed all the commits we want to verify to this command
  12 *
  13 *  $ git rev-list --objects --stdin --not --all
  14 *
  15 * and if it does not error out, that means everything reachable from
  16 * these commits locally exists and is connected to our existing refs.
  17 * Note that this does _not_ validate the individual objects.
  18 *
  19 * Returns 0 if everything is connected, non-zero otherwise.
  20 */
  21int check_connected(oid_iterate_fn fn, void *cb_data,
  22                    struct check_connected_options *opt)
  23{
  24        struct child_process rev_list = CHILD_PROCESS_INIT;
  25        struct check_connected_options defaults = CHECK_CONNECTED_INIT;
  26        char commit[GIT_MAX_HEXSZ + 1];
  27        struct object_id oid;
  28        int err = 0;
  29        struct packed_git *new_pack = NULL;
  30        struct transport *transport;
  31        size_t base_len;
  32
  33        if (!opt)
  34                opt = &defaults;
  35        transport = opt->transport;
  36
  37        if (fn(cb_data, &oid)) {
  38                if (opt->err_fd)
  39                        close(opt->err_fd);
  40                return err;
  41        }
  42
  43        if (transport && transport->smart_options &&
  44            transport->smart_options->self_contained_and_connected &&
  45            transport->pack_lockfile &&
  46            strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
  47                struct strbuf idx_file = STRBUF_INIT;
  48                strbuf_add(&idx_file, transport->pack_lockfile, base_len);
  49                strbuf_addstr(&idx_file, ".idx");
  50                new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
  51                strbuf_release(&idx_file);
  52        }
  53
  54        if (opt->check_refs_only) {
  55                /*
  56                 * For partial clones, we don't want to have to do a regular
  57                 * connectivity check because we have to enumerate and exclude
  58                 * all promisor objects (slow), and then the connectivity check
  59                 * itself becomes a no-op because in a partial clone every
  60                 * object is a promisor object. Instead, just make sure we
  61                 * received the objects pointed to by each wanted ref.
  62                 */
  63                do {
  64                        if (!repo_has_object_file(the_repository, &oid))
  65                                return 1;
  66                } while (!fn(cb_data, &oid));
  67                return 0;
  68        }
  69
  70        if (opt->shallow_file) {
  71                argv_array_push(&rev_list.args, "--shallow-file");
  72                argv_array_push(&rev_list.args, opt->shallow_file);
  73        }
  74        argv_array_push(&rev_list.args,"rev-list");
  75        argv_array_push(&rev_list.args, "--objects");
  76        argv_array_push(&rev_list.args, "--stdin");
  77        if (has_promisor_remote())
  78                argv_array_push(&rev_list.args, "--exclude-promisor-objects");
  79        if (!opt->is_deepening_fetch) {
  80                argv_array_push(&rev_list.args, "--not");
  81                argv_array_push(&rev_list.args, "--all");
  82        }
  83        argv_array_push(&rev_list.args, "--quiet");
  84        argv_array_push(&rev_list.args, "--alternate-refs");
  85        if (opt->progress)
  86                argv_array_pushf(&rev_list.args, "--progress=%s",
  87                                 _("Checking connectivity"));
  88
  89        rev_list.git_cmd = 1;
  90        rev_list.env = opt->env;
  91        rev_list.in = -1;
  92        rev_list.no_stdout = 1;
  93        if (opt->err_fd)
  94                rev_list.err = opt->err_fd;
  95        else
  96                rev_list.no_stderr = opt->quiet;
  97
  98        if (start_command(&rev_list))
  99                return error(_("Could not run 'git rev-list'"));
 100
 101        sigchain_push(SIGPIPE, SIG_IGN);
 102
 103        commit[GIT_SHA1_HEXSZ] = '\n';
 104        do {
 105                /*
 106                 * If index-pack already checked that:
 107                 * - there are no dangling pointers in the new pack
 108                 * - the pack is self contained
 109                 * Then if the updated ref is in the new pack, then we
 110                 * are sure the ref is good and not sending it to
 111                 * rev-list for verification.
 112                 */
 113                if (new_pack && find_pack_entry_one(oid.hash, new_pack))
 114                        continue;
 115
 116                memcpy(commit, oid_to_hex(&oid), GIT_SHA1_HEXSZ);
 117                if (write_in_full(rev_list.in, commit, GIT_SHA1_HEXSZ + 1) < 0) {
 118                        if (errno != EPIPE && errno != EINVAL)
 119                                error_errno(_("failed write to rev-list"));
 120                        err = -1;
 121                        break;
 122                }
 123        } while (!fn(cb_data, &oid));
 124
 125        if (close(rev_list.in))
 126                err = error_errno(_("failed to close rev-list's stdin"));
 127
 128        sigchain_pop(SIGPIPE);
 129        return finish_command(&rev_list) || err;
 130}