Git 2.1
[git/git.git] / connected.c
CommitLineData
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1#include "cache.h"
2#include "run-command.h"
3#include "sigchain.h"
4#include "connected.h"
c6807a40 5#include "transport.h"
f96400cb 6
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7int check_everything_connected(sha1_iterate_fn fn, int quiet, void *cb_data)
8{
9 return check_everything_connected_with_transport(fn, quiet, cb_data, NULL);
10}
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11/*
12 * If we feed all the commits we want to verify to this command
13 *
d21c463d 14 * $ git rev-list --objects --stdin --not --all
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15 *
16 * and if it does not error out, that means everything reachable from
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17 * these commits locally exists and is connected to our existing refs.
18 * Note that this does _not_ validate the individual objects.
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19 *
20 * Returns 0 if everything is connected, non-zero otherwise.
21 */
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22static 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)
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27{
28 struct child_process rev_list;
614db3e2 29 const char *argv[9];
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30 char commit[41];
31 unsigned char sha1[20];
614db3e2 32 int err = 0, ac = 0;
c6807a40 33 struct packed_git *new_pack = NULL;
26936bfd 34 size_t base_len;
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35
36 if (fn(cb_data, sha1))
37 return err;
38
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39 if (transport && transport->smart_options &&
40 transport->smart_options->self_contained_and_connected &&
41 transport->pack_lockfile &&
26936bfd 42 strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
c6807a40 43 struct strbuf idx_file = STRBUF_INIT;
26936bfd 44 strbuf_add(&idx_file, transport->pack_lockfile, base_len);
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45 strbuf_addstr(&idx_file, ".idx");
46 new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
47 strbuf_release(&idx_file);
48 }
49
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50 if (shallow_file) {
51 argv[ac++] = "--shallow-file";
52 argv[ac++] = shallow_file;
53 }
54 argv[ac++] = "rev-list";
55 argv[ac++] = "--objects";
56 argv[ac++] = "--stdin";
57 argv[ac++] = "--not";
58 argv[ac++] = "--all";
f96400cb 59 if (quiet)
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60 argv[ac++] = "--quiet";
61 argv[ac] = NULL;
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62
63 memset(&rev_list, 0, sizeof(rev_list));
64 rev_list.argv = argv;
65 rev_list.git_cmd = 1;
66 rev_list.in = -1;
67 rev_list.no_stdout = 1;
68 rev_list.no_stderr = quiet;
69 if (start_command(&rev_list))
70 return error(_("Could not run 'git rev-list'"));
71
72 sigchain_push(SIGPIPE, SIG_IGN);
73
74 commit[40] = '\n';
75 do {
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76 /*
77 * If index-pack already checked that:
78 * - there are no dangling pointers in the new pack
79 * - the pack is self contained
80 * Then if the updated ref is in the new pack, then we
81 * are sure the ref is good and not sending it to
82 * rev-list for verification.
83 */
84 if (new_pack && find_pack_entry_one(sha1, new_pack))
85 continue;
86
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87 memcpy(commit, sha1_to_hex(sha1), 40);
88 if (write_in_full(rev_list.in, commit, 41) < 0) {
89 if (errno != EPIPE && errno != EINVAL)
90 error(_("failed write to rev-list: %s"),
91 strerror(errno));
92 err = -1;
93 break;
94 }
95 } while (!fn(cb_data, sha1));
96
97 if (close(rev_list.in)) {
98 error(_("failed to close rev-list's stdin: %s"), strerror(errno));
99 err = -1;
100 }
101
102 sigchain_pop(SIGPIPE);
103 return finish_command(&rev_list) || err;
104}
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105
106int check_everything_connected_with_transport(sha1_iterate_fn fn,
107 int quiet,
108 void *cb_data,
109 struct transport *transport)
110{
111 return check_everything_connected_real(fn, quiet, cb_data,
112 transport, NULL);
113}
114
115int check_shallow_connected(sha1_iterate_fn fn, int quiet, void *cb_data,
116 const char *shallow_file)
117{
118 return check_everything_connected_real(fn, quiet, cb_data,
119 NULL, shallow_file);
120}