pack: move install_packed_git()
[git/git.git] / connected.c
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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"
9a428653 6#include "pack.h"
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7
8/*
9 * If we feed all the commits we want to verify to this command
10 *
d21c463d 11 * $ git rev-list --objects --stdin --not --all
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12 *
13 * and if it does not error out, that means everything reachable from
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14 * these commits locally exists and is connected to our existing refs.
15 * Note that this does _not_ validate the individual objects.
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16 *
17 * Returns 0 if everything is connected, non-zero otherwise.
18 */
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19int check_connected(sha1_iterate_fn fn, void *cb_data,
20 struct check_connected_options *opt)
f96400cb 21{
d3180279 22 struct child_process rev_list = CHILD_PROCESS_INIT;
7043c707 23 struct check_connected_options defaults = CHECK_CONNECTED_INIT;
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24 char commit[41];
25 unsigned char sha1[20];
3be89f9b 26 int err = 0;
c6807a40 27 struct packed_git *new_pack = NULL;
7043c707 28 struct transport *transport;
26936bfd 29 size_t base_len;
f96400cb 30
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31 if (!opt)
32 opt = &defaults;
33 transport = opt->transport;
34
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35 if (fn(cb_data, sha1)) {
36 if (opt->err_fd)
37 close(opt->err_fd);
f96400cb 38 return err;
e0331849 39 }
f96400cb 40
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41 if (transport && transport->smart_options &&
42 transport->smart_options->self_contained_and_connected &&
43 transport->pack_lockfile &&
26936bfd 44 strip_suffix(transport->pack_lockfile, ".keep", &base_len)) {
c6807a40 45 struct strbuf idx_file = STRBUF_INIT;
26936bfd 46 strbuf_add(&idx_file, transport->pack_lockfile, base_len);
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47 strbuf_addstr(&idx_file, ".idx");
48 new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
49 strbuf_release(&idx_file);
50 }
51
7043c707 52 if (opt->shallow_file) {
3be89f9b 53 argv_array_push(&rev_list.args, "--shallow-file");
7043c707 54 argv_array_push(&rev_list.args, opt->shallow_file);
614db3e2 55 }
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56 argv_array_push(&rev_list.args,"rev-list");
57 argv_array_push(&rev_list.args, "--objects");
58 argv_array_push(&rev_list.args, "--stdin");
59 argv_array_push(&rev_list.args, "--not");
60 argv_array_push(&rev_list.args, "--all");
61 argv_array_push(&rev_list.args, "--quiet");
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62 if (opt->progress)
63 argv_array_pushf(&rev_list.args, "--progress=%s",
64 _("Checking connectivity"));
f96400cb 65
f96400cb 66 rev_list.git_cmd = 1;
526f108a 67 rev_list.env = opt->env;
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68 rev_list.in = -1;
69 rev_list.no_stdout = 1;
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70 if (opt->err_fd)
71 rev_list.err = opt->err_fd;
72 else
73 rev_list.no_stderr = opt->quiet;
74
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75 if (start_command(&rev_list))
76 return error(_("Could not run 'git rev-list'"));
77
78 sigchain_push(SIGPIPE, SIG_IGN);
79
80 commit[40] = '\n';
81 do {
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82 /*
83 * If index-pack already checked that:
84 * - there are no dangling pointers in the new pack
85 * - the pack is self contained
86 * Then if the updated ref is in the new pack, then we
87 * are sure the ref is good and not sending it to
88 * rev-list for verification.
89 */
90 if (new_pack && find_pack_entry_one(sha1, new_pack))
91 continue;
92
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93 memcpy(commit, sha1_to_hex(sha1), 40);
94 if (write_in_full(rev_list.in, commit, 41) < 0) {
95 if (errno != EPIPE && errno != EINVAL)
5cc026e2 96 error_errno(_("failed write to rev-list"));
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97 err = -1;
98 break;
99 }
100 } while (!fn(cb_data, sha1));
101
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102 if (close(rev_list.in))
103 err = error_errno(_("failed to close rev-list's stdin"));
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104
105 sigchain_pop(SIGPIPE);
106 return finish_command(&rev_list) || err;
107}