promisor-remote: skip move_to_tail when no-op
[git/git.git] / connected.c
CommitLineData
f96400cb 1#include "cache.h"
dfa33a29 2#include "object-store.h"
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3#include "run-command.h"
4#include "sigchain.h"
5#include "connected.h"
c6807a40 6#include "transport.h"
0abe14f6 7#include "packfile.h"
b14ed5ad 8#include "promisor-remote.h"
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9
10/*
11 * If we feed all the commits we want to verify to this command
12 *
d21c463d 13 * $ git rev-list --objects --stdin --not --all
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14 *
15 * and if it does not error out, that means everything reachable from
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16 * these commits locally exists and is connected to our existing refs.
17 * Note that this does _not_ validate the individual objects.
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18 *
19 * Returns 0 if everything is connected, non-zero otherwise.
20 */
6ccac9ee 21int check_connected(oid_iterate_fn fn, void *cb_data,
7043c707 22 struct check_connected_options *opt)
f96400cb 23{
d3180279 24 struct child_process rev_list = CHILD_PROCESS_INIT;
7043c707 25 struct check_connected_options defaults = CHECK_CONNECTED_INIT;
6ccac9ee 26 char commit[GIT_MAX_HEXSZ + 1];
27 struct object_id oid;
3be89f9b 28 int err = 0;
c6807a40 29 struct packed_git *new_pack = NULL;
7043c707 30 struct transport *transport;
26936bfd 31 size_t base_len;
f96400cb 32
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33 if (!opt)
34 opt = &defaults;
35 transport = opt->transport;
36
6ccac9ee 37 if (fn(cb_data, &oid)) {
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38 if (opt->err_fd)
39 close(opt->err_fd);
f96400cb 40 return err;
e0331849 41 }
f96400cb 42
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43 if (transport && transport->smart_options &&
44 transport->smart_options->self_contained_and_connected &&
45 transport->pack_lockfile &&
26936bfd 46 strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
c6807a40 47 struct strbuf idx_file = STRBUF_INIT;
26936bfd 48 strbuf_add(&idx_file, transport->pack_lockfile, base_len);
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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
dfa33a29
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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
7043c707 70 if (opt->shallow_file) {
3be89f9b 71 argv_array_push(&rev_list.args, "--shallow-file");
7043c707 72 argv_array_push(&rev_list.args, opt->shallow_file);
614db3e2 73 }
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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");
b14ed5ad 77 if (has_promisor_remote())
acb0c572 78 argv_array_push(&rev_list.args, "--exclude-promisor-objects");
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79 if (!opt->is_deepening_fetch) {
80 argv_array_push(&rev_list.args, "--not");
81 argv_array_push(&rev_list.args, "--all");
82 }
3be89f9b 83 argv_array_push(&rev_list.args, "--quiet");
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84 if (opt->progress)
85 argv_array_pushf(&rev_list.args, "--progress=%s",
86 _("Checking connectivity"));
f96400cb 87
f96400cb 88 rev_list.git_cmd = 1;
526f108a 89 rev_list.env = opt->env;
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90 rev_list.in = -1;
91 rev_list.no_stdout = 1;
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92 if (opt->err_fd)
93 rev_list.err = opt->err_fd;
94 else
95 rev_list.no_stderr = opt->quiet;
96
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97 if (start_command(&rev_list))
98 return error(_("Could not run 'git rev-list'"));
99
100 sigchain_push(SIGPIPE, SIG_IGN);
101
6ccac9ee 102 commit[GIT_SHA1_HEXSZ] = '\n';
f96400cb 103 do {
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104 /*
105 * If index-pack already checked that:
106 * - there are no dangling pointers in the new pack
107 * - the pack is self contained
108 * Then if the updated ref is in the new pack, then we
109 * are sure the ref is good and not sending it to
110 * rev-list for verification.
111 */
6ccac9ee 112 if (new_pack && find_pack_entry_one(oid.hash, new_pack))
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113 continue;
114
6ccac9ee 115 memcpy(commit, oid_to_hex(&oid), GIT_SHA1_HEXSZ);
116 if (write_in_full(rev_list.in, commit, GIT_SHA1_HEXSZ + 1) < 0) {
f96400cb 117 if (errno != EPIPE && errno != EINVAL)
5cc026e2 118 error_errno(_("failed write to rev-list"));
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119 err = -1;
120 break;
121 }
6ccac9ee 122 } while (!fn(cb_data, &oid));
f96400cb 123
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124 if (close(rev_list.in))
125 err = error_errno(_("failed to close rev-list's stdin"));
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126
127 sigchain_pop(SIGPIPE);
128 return finish_command(&rev_list) || err;
129}