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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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33
merge.c
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@ -1,4 +1,6 @@
#include "cache.h"
#include "diff.h"
#include "diffcore.h"
#include "lockfile.h"
#include "commit.h"
#include "run-command.h"
@ -15,6 +17,37 @@ static const char *merge_argument(struct commit *commit)
return EMPTY_TREE_SHA1_HEX;
}
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;
}
}
int try_merge_command(const char *strategy, size_t xopts_nr,
const char **xopts, struct commit_list *common,
const char *head_arg, struct commit_list *remotes)