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merge-tree: provide a list of which files have conflicts

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Callers of `git merge-tree --write-tree` will often want to know which
files had conflicts.  While they could potentially attempt to parse the
CONFLICT notices printed, those messages are not meant to be machine
readable.  Provide a simpler mechanism of just printing the files (in
the same format as `git ls-files` with quoting, but restricted to
unmerged files) in the output before the free-form messages.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren
2022-06-18 00:20:52 +00:00
committed by Junio C Hamano
parent a4040cfa35
commit 7fa3338870
3 changed files with 43 additions and 3 deletions
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26
builtin/merge-tree.c
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@ -11,6 +11,9 @@
#include "blob.h"
#include "exec-cmd.h"
#include "merge-blobs.h"
#include "quote.h"
static int line_termination = '\n';
struct merge_list {
struct merge_list *next;
@ -400,7 +403,8 @@ struct merge_tree_options {
};
static int real_merge(struct merge_tree_options *o,
const char *branch1, const char *branch2)
const char *branch1, const char *branch2,
const char *prefix)
{
struct commit *parent1, *parent2;
struct commit_list *merge_bases = NULL;
@ -441,8 +445,24 @@ static int real_merge(struct merge_tree_options *o,
o->show_messages = !result.clean;
puts(oid_to_hex(&result.tree->object.oid));
if (!result.clean) {
struct string_list conflicted_files = STRING_LIST_INIT_NODUP;
const char *last = NULL;
int i;
merge_get_conflicted_files(&result, &conflicted_files);
for (i = 0; i < conflicted_files.nr; i++) {
const char *name = conflicted_files.items[i].string;
if (last && !strcmp(last, name))
continue;
write_name_quoted_relative(
name, prefix, stdout, line_termination);
last = name;
}
string_list_clear(&conflicted_files, 1);
}
if (o->show_messages) {
printf("\n");
putchar(line_termination);
merge_display_update_messages(&opt, &result);
}
merge_finalize(&opt, &result);
@ -508,7 +528,7 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix)
/* Do the relevant type of merge */
if (o.mode == MODE_REAL)
return real_merge(&o, argv[0], argv[1]);
return real_merge(&o, argv[0], argv[1], prefix);
else
return trivial_merge(argv[0], argv[1], argv[2]);
}