connected.c

   1 #include "cache.h"
   2 #include "run-command.h"
   3 #include "sigchain.h"
   4 #include "connected.h"
   5 #include "transport.h"
   6
   7 int check_everything_connected(sha1_iterate_fn fn, int quiet, void *cb_data)
   8 {
   9         return check_everything_connected_with_transport(fn, quiet, cb_data, NULL);
  10 }
  11 /*
  12  * If we feed all the commits we want to verify to this command
  13  *
  14  *  $ git rev-list --objects --stdin --not --all
  15  *
  16  * and if it does not error out, that means everything reachable from
  17  * these commits locally exists and is connected to our existing refs.
  18  * Note that this does _not_ validate the individual objects.
  19  *
  20  * Returns 0 if everything is connected, non-zero otherwise.
  21  */
  22 static int check_everything_connected_real(sha1_iterate_fn fn,
  23                                            int quiet,
  24                                            void *cb_data,
  25                                            struct transport *transport,
  26                                            const char *shallow_file)
  27 {
  28         struct child_process rev_list = CHILD_PROCESS_INIT;
  29         char commit[41];
  30         unsigned char sha1[20];
  31         int err = 0;
  32         struct packed_git *new_pack = NULL;
  33         size_t base_len;
  34
  35         if (fn(cb_data, sha1))
  36                 return err;
  37
  38         if (transport && transport->smart_options &&
  39             transport->smart_options->self_contained_and_connected &&
  40             transport->pack_lockfile &&
  41             strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
  42                 struct strbuf idx_file = STRBUF_INIT;
  43                 strbuf_add(&idx_file, transport->pack_lockfile, base_len);
  44                 strbuf_addstr(&idx_file, ".idx");
  45                 new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
  46                 strbuf_release(&idx_file);
  47         }
  48
  49         if (shallow_file) {
  50                 argv_array_push(&rev_list.args, "--shallow-file");
  51                 argv_array_push(&rev_list.args, shallow_file);
  52         }
  53         argv_array_push(&rev_list.args,"rev-list");
  54         argv_array_push(&rev_list.args, "--objects");
  55         argv_array_push(&rev_list.args, "--stdin");
  56         argv_array_push(&rev_list.args, "--not");
  57         argv_array_push(&rev_list.args, "--all");
  58         argv_array_push(&rev_list.args, "--quiet");
  59
  60         rev_list.git_cmd = 1;
  61         rev_list.in = -1;
  62         rev_list.no_stdout = 1;
  63         rev_list.no_stderr = quiet;
  64         if (start_command(&rev_list))
  65                 return error(_("Could not run 'git rev-list'"));
  66
  67         sigchain_push(SIGPIPE, SIG_IGN);
  68
  69         commit[40] = '\n';
  70         do {
  71                 /*
  72                  * If index-pack already checked that:
  73                  * - there are no dangling pointers in the new pack
  74                  * - the pack is self contained
  75                  * Then if the updated ref is in the new pack, then we
  76                  * are sure the ref is good and not sending it to
  77                  * rev-list for verification.
  78                  */
  79                 if (new_pack && find_pack_entry_one(sha1, new_pack))
  80                         continue;
  81
  82                 memcpy(commit, sha1_to_hex(sha1), 40);
  83                 if (write_in_full(rev_list.in, commit, 41) < 0) {
  84                         if (errno != EPIPE && errno != EINVAL)
  85                                 error_errno(_("failed write to rev-list"));
  86                         err = -1;
  87                         break;
  88                 }
  89         } while (!fn(cb_data, sha1));
  90
  91         if (close(rev_list.in))
  92                 err = error_errno(_("failed to close rev-list's stdin"));
  93
  94         sigchain_pop(SIGPIPE);
  95         return finish_command(&rev_list) || err;
  96 }
  97
  98 int check_everything_connected_with_transport(sha1_iterate_fn fn,
  99                                               int quiet,
 100                                               void *cb_data,
 101                                               struct transport *transport)
 102 {
 103         return check_everything_connected_real(fn, quiet, cb_data,
 104                                                transport, NULL);
 105 }
 106
 107 int check_shallow_connected(sha1_iterate_fn fn, int quiet, void *cb_data,
 108                             const char *shallow_file)
 109 {
 110         return check_everything_connected_real(fn, quiet, cb_data,
 111                                                NULL, shallow_file);
 112 }