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