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move index_has_changes() from builtin/am.c to merge.c for reuse

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index_has_changes() is a function we want to reuse outside of just am,
making it also available for merge-recursive and merge-ort.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren
2017-12-21 11:19:06 -08:00
committed by Junio C Hamano
parent eab3f2850e
commit b101793c43
3 changed files with 42 additions and 37 deletions
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37
builtin/am.c
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@ -1142,43 +1142,6 @@ static void refresh_and_write_cache(void)
die(_("unable to write index file"));
}
/**
* Returns 1 if the index differs from HEAD, 0 otherwise. When on an unborn
* branch, returns 1 if there are entries in the index, 0 otherwise. If an
* strbuf is provided, the space-separated list of files that differ will be
* appended to it.
*/
static int index_has_changes(struct strbuf *sb)
{
struct object_id head;
int i;
if (!get_oid_tree("HEAD", &head)) {
struct diff_options opt;
diff_setup(&opt);
DIFF_OPT_SET(&opt, EXIT_WITH_STATUS);
if (!sb)
DIFF_OPT_SET(&opt, QUICK);
do_diff_cache(&head, &opt);
diffcore_std(&opt);
for (i = 0; sb && i < diff_queued_diff.nr; i++) {
if (i)
strbuf_addch(sb, ' ');
strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path);
}
diff_flush(&opt);
return DIFF_OPT_TST(&opt, HAS_CHANGES) != 0;
} else {
for (i = 0; sb && i < active_nr; i++) {
if (i)
strbuf_addch(sb, ' ');
strbuf_addstr(sb, active_cache[i]->name);
}
return !!active_nr;
}
}
/**
* Dies with a user-friendly message on how to proceed after resolving the
* problem. This message can be overridden with state->resolvemsg.