Andrew's git - gitweb.git/blob

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