Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "run-command.h"
   3#include "sigchain.h"
   4#include "connected.h"
   5
   6/*
   7 * If we feed all the commits we want to verify to this command
   8 *
   9 *  $ git rev-list --verify-objects --stdin --not --all
  10 *
  11 * and if it does not error out, that means everything reachable from
  12 * these commits locally exists and is connected to some of our
  13 * existing refs.
  14 *
  15 * Returns 0 if everything is connected, non-zero otherwise.
  16 */
  17int check_everything_connected(sha1_iterate_fn fn, int quiet, void *cb_data)
  18{
  19        struct child_process rev_list;
  20        const char *argv[] = {"rev-list", "--verify-objects",
  21                              "--stdin", "--not", "--all", NULL, NULL};
  22        char commit[41];
  23        unsigned char sha1[20];
  24        int err = 0;
  25
  26        if (fn(cb_data, sha1))
  27                return err;
  28
  29        if (quiet)
  30                argv[5] = "--quiet";
  31
  32        memset(&rev_list, 0, sizeof(rev_list));
  33        rev_list.argv = argv;
  34        rev_list.git_cmd = 1;
  35        rev_list.in = -1;
  36        rev_list.no_stdout = 1;
  37        rev_list.no_stderr = quiet;
  38        if (start_command(&rev_list))
  39                return error(_("Could not run 'git rev-list'"));
  40
  41        sigchain_push(SIGPIPE, SIG_IGN);
  42
  43        commit[40] = '\n';
  44        do {
  45                memcpy(commit, sha1_to_hex(sha1), 40);
  46                if (write_in_full(rev_list.in, commit, 41) < 0) {
  47                        if (errno != EPIPE && errno != EINVAL)
  48                                error(_("failed write to rev-list: %s"),
  49                                      strerror(errno));
  50                        err = -1;
  51                        break;
  52                }
  53        } while (!fn(cb_data, sha1));
  54
  55        if (close(rev_list.in)) {
  56                error(_("failed to close rev-list's stdin: %s"), strerror(errno));
  57                err = -1;
  58        }
  59
  60        sigchain_pop(SIGPIPE);
  61        return finish_command(&rev_list) || err;
  62}