fetch/receive: remove over-pessimistic connectivity check
[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"
5
6/*
7 * If we feed all the commits we want to verify to this command
8 *
d21c463d 9 * $ git rev-list --objects --stdin --not --all
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10 *
11 * and if it does not error out, that means everything reachable from
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12 * these commits locally exists and is connected to our existing refs.
13 * Note that this does _not_ validate the individual objects.
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14 *
15 * Returns 0 if everything is connected, non-zero otherwise.
16 */
17int check_everything_connected(sha1_iterate_fn fn, int quiet, void *cb_data)
18{
19 struct child_process rev_list;
d21c463d 20 const char *argv[] = {"rev-list", "--objects",
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21 "--stdin", "--not", "--all", NULL, NULL};
22 char commit[41];
23 unsigned char sha1[20];
24 int err = 0;
25
26 if (fn(cb_data, sha1))
27 return err;
28
29 if (quiet)
30 argv[5] = "--quiet";
31
32 memset(&rev_list, 0, sizeof(rev_list));
33 rev_list.argv = argv;
34 rev_list.git_cmd = 1;
35 rev_list.in = -1;
36 rev_list.no_stdout = 1;
37 rev_list.no_stderr = quiet;
38 if (start_command(&rev_list))
39 return error(_("Could not run 'git rev-list'"));
40
41 sigchain_push(SIGPIPE, SIG_IGN);
42
43 commit[40] = '\n';
44 do {
45 memcpy(commit, sha1_to_hex(sha1), 40);
46 if (write_in_full(rev_list.in, commit, 41) < 0) {
47 if (errno != EPIPE && errno != EINVAL)
48 error(_("failed write to rev-list: %s"),
49 strerror(errno));
50 err = -1;
51 break;
52 }
53 } while (!fn(cb_data, sha1));
54
55 if (close(rev_list.in)) {
56 error(_("failed to close rev-list's stdin: %s"), strerror(errno));
57 err = -1;
58 }
59
60 sigchain_pop(SIGPIPE);
61 return finish_command(&rev_list) || err;
62}