stash: remove now superfluos help for "stash push"
[git.git] / connected.c
blobf416b05051f3b794c9be74e9baaf3b84e18ff6a2
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"
8 /*
9 * If we feed all the commits we want to verify to this command
11 * $ git rev-list --objects --stdin --not --all
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.
17 * Returns 0 if everything is connected, non-zero otherwise.
19 int check_connected(sha1_iterate_fn fn, void *cb_data,
20 struct check_connected_options *opt)
22 struct child_process rev_list = CHILD_PROCESS_INIT;
23 struct check_connected_options defaults = CHECK_CONNECTED_INIT;
24 char commit[41];
25 unsigned char sha1[20];
26 int err = 0;
27 struct packed_git *new_pack = NULL;
28 struct transport *transport;
29 size_t base_len;
31 if (!opt)
32 opt = &defaults;
33 transport = opt->transport;
35 if (fn(cb_data, sha1)) {
36 if (opt->err_fd)
37 close(opt->err_fd);
38 return err;
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);
52 if (opt->shallow_file) {
53 argv_array_push(&rev_list.args, "--shallow-file");
54 argv_array_push(&rev_list.args, opt->shallow_file);
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"));
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;
75 if (start_command(&rev_list))
76 return error(_("Could not run 'git rev-list'"));
78 sigchain_push(SIGPIPE, SIG_IGN);
80 commit[40] = '\n';
81 do {
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.
90 if (new_pack && find_pack_entry_one(sha1, new_pack))
91 continue;
93 memcpy(commit, sha1_to_hex(sha1), 40);
94 if (write_in_full(rev_list.in, commit, 41) < 0) {
95 if (errno != EPIPE && errno != EINVAL)
96 error_errno(_("failed write to rev-list"));
97 err = -1;
98 break;
100 } while (!fn(cb_data, sha1));
102 if (close(rev_list.in))
103 err = error_errno(_("failed to close rev-list's stdin"));
105 sigchain_pop(SIGPIPE);
106 return finish_command(&rev_list) || err;