Merge branch 'dl/complete-cherry-pick-revert-skip'
[git/git.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 }