Merge branch 'rs/convert-fix-utf-without-dash'
[git] / connected.c
1 #include "cache.h"
2 #include "object-store.h"
3 #include "run-command.h"
4 #include "sigchain.h"
5 #include "connected.h"
6 #include "transport.h"
7 #include "packfile.h"
8 #include "promisor-remote.h"
9
10 /*
11  * If we feed all the commits we want to verify to this command
12  *
13  *  $ git rev-list --objects --stdin --not --all
14  *
15  * and if it does not error out, that means everything reachable from
16  * these commits locally exists and is connected to our existing refs.
17  * Note that this does _not_ validate the individual objects.
18  *
19  * Returns 0 if everything is connected, non-zero otherwise.
20  */
21 int check_connected(oid_iterate_fn fn, void *cb_data,
22                     struct check_connected_options *opt)
23 {
24         struct child_process rev_list = CHILD_PROCESS_INIT;
25         struct check_connected_options defaults = CHECK_CONNECTED_INIT;
26         char commit[GIT_MAX_HEXSZ + 1];
27         struct object_id oid;
28         int err = 0;
29         struct packed_git *new_pack = NULL;
30         struct transport *transport;
31         size_t base_len;
32
33         if (!opt)
34                 opt = &defaults;
35         transport = opt->transport;
36
37         if (fn(cb_data, &oid)) {
38                 if (opt->err_fd)
39                         close(opt->err_fd);
40                 return err;
41         }
42
43         if (transport && transport->smart_options &&
44             transport->smart_options->self_contained_and_connected &&
45             transport->pack_lockfile &&
46             strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
47                 struct strbuf idx_file = STRBUF_INIT;
48                 strbuf_add(&idx_file, transport->pack_lockfile, base_len);
49                 strbuf_addstr(&idx_file, ".idx");
50                 new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
51                 strbuf_release(&idx_file);
52         }
53
54         if (opt->check_refs_only) {
55                 /*
56                  * For partial clones, we don't want to have to do a regular
57                  * connectivity check because we have to enumerate and exclude
58                  * all promisor objects (slow), and then the connectivity check
59                  * itself becomes a no-op because in a partial clone every
60                  * object is a promisor object. Instead, just make sure we
61                  * received the objects pointed to by each wanted ref.
62                  */
63                 do {
64                         if (!repo_has_object_file(the_repository, &oid))
65                                 return 1;
66                 } while (!fn(cb_data, &oid));
67                 return 0;
68         }
69
70         if (opt->shallow_file) {
71                 argv_array_push(&rev_list.args, "--shallow-file");
72                 argv_array_push(&rev_list.args, opt->shallow_file);
73         }
74         argv_array_push(&rev_list.args,"rev-list");
75         argv_array_push(&rev_list.args, "--objects");
76         argv_array_push(&rev_list.args, "--stdin");
77         if (has_promisor_remote())
78                 argv_array_push(&rev_list.args, "--exclude-promisor-objects");
79         if (!opt->is_deepening_fetch) {
80                 argv_array_push(&rev_list.args, "--not");
81                 argv_array_push(&rev_list.args, "--all");
82         }
83         argv_array_push(&rev_list.args, "--quiet");
84         argv_array_push(&rev_list.args, "--alternate-refs");
85         if (opt->progress)
86                 argv_array_pushf(&rev_list.args, "--progress=%s",
87                                  _("Checking connectivity"));
88
89         rev_list.git_cmd = 1;
90         rev_list.env = opt->env;
91         rev_list.in = -1;
92         rev_list.no_stdout = 1;
93         if (opt->err_fd)
94                 rev_list.err = opt->err_fd;
95         else
96                 rev_list.no_stderr = opt->quiet;
97
98         if (start_command(&rev_list))
99                 return error(_("Could not run 'git rev-list'"));
100
101         sigchain_push(SIGPIPE, SIG_IGN);
102
103         commit[GIT_SHA1_HEXSZ] = '\n';
104         do {
105                 /*
106                  * If index-pack already checked that:
107                  * - there are no dangling pointers in the new pack
108                  * - the pack is self contained
109                  * Then if the updated ref is in the new pack, then we
110                  * are sure the ref is good and not sending it to
111                  * rev-list for verification.
112                  */
113                 if (new_pack && find_pack_entry_one(oid.hash, new_pack))
114                         continue;
115
116                 memcpy(commit, oid_to_hex(&oid), GIT_SHA1_HEXSZ);
117                 if (write_in_full(rev_list.in, commit, GIT_SHA1_HEXSZ + 1) < 0) {
118                         if (errno != EPIPE && errno != EINVAL)
119                                 error_errno(_("failed write to rev-list"));
120                         err = -1;
121                         break;
122                 }
123         } while (!fn(cb_data, &oid));
124
125         if (close(rev_list.in))
126                 err = error_errno(_("failed to close rev-list's stdin"));
127
128         sigchain_pop(SIGPIPE);
129         return finish_command(&rev_list) || err;
130 }