Documentation/describe: improve one-line summary
[git.git] / connected.c
blob299c56090bc38b1572b0ac03ec48532f40de605f
1 #include "cache.h"
2 #include "run-command.h"
3 #include "sigchain.h"
4 #include "connected.h"
5 #include "transport.h"
7 int check_everything_connected(sha1_iterate_fn fn, int quiet, void *cb_data)
9 return check_everything_connected_with_transport(fn, quiet, cb_data, NULL);
12 * If we feed all the commits we want to verify to this command
14 * $ git rev-list --objects --stdin --not --all
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.
20 * Returns 0 if everything is connected, non-zero otherwise.
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)
28 struct child_process rev_list = CHILD_PROCESS_INIT;
29 const char *argv[9];
30 char commit[41];
31 unsigned char sha1[20];
32 int err = 0, ac = 0;
33 struct packed_git *new_pack = NULL;
34 size_t base_len;
36 if (fn(cb_data, sha1))
37 return err;
39 if (transport && transport->smart_options &&
40 transport->smart_options->self_contained_and_connected &&
41 transport->pack_lockfile &&
42 strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
43 struct strbuf idx_file = STRBUF_INIT;
44 strbuf_add(&idx_file, transport->pack_lockfile, base_len);
45 strbuf_addstr(&idx_file, ".idx");
46 new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
47 strbuf_release(&idx_file);
50 if (shallow_file) {
51 argv[ac++] = "--shallow-file";
52 argv[ac++] = shallow_file;
54 argv[ac++] = "rev-list";
55 argv[ac++] = "--objects";
56 argv[ac++] = "--stdin";
57 argv[ac++] = "--not";
58 argv[ac++] = "--all";
59 if (quiet)
60 argv[ac++] = "--quiet";
61 argv[ac] = NULL;
63 rev_list.argv = argv;
64 rev_list.git_cmd = 1;
65 rev_list.in = -1;
66 rev_list.no_stdout = 1;
67 rev_list.no_stderr = quiet;
68 if (start_command(&rev_list))
69 return error(_("Could not run 'git rev-list'"));
71 sigchain_push(SIGPIPE, SIG_IGN);
73 commit[40] = '\n';
74 do {
76 * If index-pack already checked that:
77 * - there are no dangling pointers in the new pack
78 * - the pack is self contained
79 * Then if the updated ref is in the new pack, then we
80 * are sure the ref is good and not sending it to
81 * rev-list for verification.
83 if (new_pack && find_pack_entry_one(sha1, new_pack))
84 continue;
86 memcpy(commit, sha1_to_hex(sha1), 40);
87 if (write_in_full(rev_list.in, commit, 41) < 0) {
88 if (errno != EPIPE && errno != EINVAL)
89 error(_("failed write to rev-list: %s"),
90 strerror(errno));
91 err = -1;
92 break;
94 } while (!fn(cb_data, sha1));
96 if (close(rev_list.in)) {
97 error(_("failed to close rev-list's stdin: %s"), strerror(errno));
98 err = -1;
101 sigchain_pop(SIGPIPE);
102 return finish_command(&rev_list) || err;
105 int check_everything_connected_with_transport(sha1_iterate_fn fn,
106 int quiet,
107 void *cb_data,
108 struct transport *transport)
110 return check_everything_connected_real(fn, quiet, cb_data,
111 transport, NULL);
114 int check_shallow_connected(sha1_iterate_fn fn, int quiet, void *cb_data,
115 const char *shallow_file)
117 return check_everything_connected_real(fn, quiet, cb_data,
118 NULL, shallow_file);