summaryrefslogtreecommitdiff
path: root/merge-recursive.c
diff options
context:
space:
mode:
Diffstat (limited to 'merge-recursive.c')
-rw-r--r--merge-recursive.c164
1 files changed, 142 insertions, 22 deletions
diff --git a/merge-recursive.c b/merge-recursive.c
index 638076ec6e..aadd48c4fc 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -644,7 +644,9 @@ static int merge_3way(struct merge_options *o,
merge_status = ll_merge(result_buf, a->path, &orig, base_name,
&src1, name1, &src2, name2,
- (!!o->call_depth) | (favor << 1));
+ ((o->call_depth ? LL_OPT_VIRTUAL_ANCESTOR : 0) |
+ (o->renormalize ? LL_OPT_RENORMALIZE : 0) |
+ create_ll_flag(favor)));
free(name1);
free(name2);
@@ -1017,14 +1019,22 @@ static int process_renames(struct merge_options *o,
if (mfi.clean &&
sha_eq(mfi.sha, ren1->pair->two->sha1) &&
- mfi.mode == ren1->pair->two->mode)
+ mfi.mode == ren1->pair->two->mode) {
/*
- * This messaged is part of
+ * This message is part of
* t6022 test. If you change
* it update the test too.
*/
output(o, 3, "Skipped %s (merged same as existing)", ren1_dst);
- else {
+
+ /* There may be higher stage entries left
+ * in the index (e.g. due to a D/F
+ * conflict) that need to be resolved.
+ */
+ if (!ren1->dst_entry->stages[2].mode !=
+ !ren1->dst_entry->stages[3].mode)
+ ren1->dst_entry->processed = 0;
+ } else {
if (mfi.merge || !mfi.clean)
output(o, 1, "Renaming %s => %s", ren1_src, ren1_dst);
if (mfi.merge)
@@ -1054,6 +1064,53 @@ static unsigned char *stage_sha(const unsigned char *sha, unsigned mode)
return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha;
}
+static int read_sha1_strbuf(const unsigned char *sha1, struct strbuf *dst)
+{
+ void *buf;
+ enum object_type type;
+ unsigned long size;
+ buf = read_sha1_file(sha1, &type, &size);
+ if (!buf)
+ return error("cannot read object %s", sha1_to_hex(sha1));
+ if (type != OBJ_BLOB) {
+ free(buf);
+ return error("object %s is not a blob", sha1_to_hex(sha1));
+ }
+ strbuf_attach(dst, buf, size, size + 1);
+ return 0;
+}
+
+static int blob_unchanged(const unsigned char *o_sha,
+ const unsigned char *a_sha,
+ int renormalize, const char *path)
+{
+ struct strbuf o = STRBUF_INIT;
+ struct strbuf a = STRBUF_INIT;
+ int ret = 0; /* assume changed for safety */
+
+ if (sha_eq(o_sha, a_sha))
+ return 1;
+ if (!renormalize)
+ return 0;
+
+ assert(o_sha && a_sha);
+ if (read_sha1_strbuf(o_sha, &o) || read_sha1_strbuf(a_sha, &a))
+ goto error_return;
+ /*
+ * Note: binary | is used so that both renormalizations are
+ * performed. Comparison can be skipped if both files are
+ * unchanged since their sha1s have already been compared.
+ */
+ if (renormalize_buffer(path, o.buf, o.len, &o) |
+ renormalize_buffer(path, a.buf, o.len, &a))
+ ret = (o.len == a.len && !memcmp(o.buf, a.buf, o.len));
+
+error_return:
+ strbuf_release(&o);
+ strbuf_release(&a);
+ return ret;
+}
+
/* Per entry merge function */
static int process_entry(struct merge_options *o,
const char *path, struct stage_data *entry)
@@ -1063,6 +1120,7 @@ static int process_entry(struct merge_options *o,
print_index_entry("\tpath: ", entry);
*/
int clean_merge = 1;
+ int normalize = o->renormalize;
unsigned o_mode = entry->stages[1].mode;
unsigned a_mode = entry->stages[2].mode;
unsigned b_mode = entry->stages[3].mode;
@@ -1070,11 +1128,12 @@ static int process_entry(struct merge_options *o,
unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode);
unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode);
+ entry->processed = 1;
if (o_sha && (!a_sha || !b_sha)) {
/* Case A: Deleted in one */
if ((!a_sha && !b_sha) ||
- (sha_eq(a_sha, o_sha) && !b_sha) ||
- (!a_sha && sha_eq(b_sha, o_sha))) {
+ (!b_sha && blob_unchanged(o_sha, a_sha, normalize, path)) ||
+ (!a_sha && blob_unchanged(o_sha, b_sha, normalize, path))) {
/* Deleted in both or deleted in one and
* unchanged in the other */
if (a_sha)
@@ -1102,33 +1161,28 @@ static int process_entry(struct merge_options *o,
} else if ((!o_sha && a_sha && !b_sha) ||
(!o_sha && !a_sha && b_sha)) {
/* Case B: Added in one. */
- const char *add_branch;
- const char *other_branch;
unsigned mode;
const unsigned char *sha;
- const char *conf;
if (a_sha) {
- add_branch = o->branch1;
- other_branch = o->branch2;
mode = a_mode;
sha = a_sha;
- conf = "file/directory";
} else {
- add_branch = o->branch2;
- other_branch = o->branch1;
mode = b_mode;
sha = b_sha;
- conf = "directory/file";
}
if (string_list_has_string(&o->current_directory_set, path)) {
- const char *new_path = unique_path(o, path, add_branch);
- clean_merge = 0;
- output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. "
- "Adding %s as %s",
- conf, path, other_branch, path, new_path);
- remove_file(o, 0, path, 0);
- update_file(o, 0, sha, mode, new_path);
+ /* Handle D->F conflicts after all subfiles */
+ entry->processed = 0;
+ /* But get any file out of the way now, so conflicted
+ * entries below the directory of the same name can
+ * be put in the working directory.
+ */
+ if (a_sha)
+ output(o, 2, "Removing %s", path);
+ /* do not touch working file if it did not exist */
+ remove_file(o, 0, path, !a_sha);
+ return 1; /* Assume clean till processed */
} else {
output(o, 2, "Adding %s", path);
update_file(o, 1, sha, mode, path);
@@ -1176,6 +1230,64 @@ static int process_entry(struct merge_options *o,
return clean_merge;
}
+/*
+ * Per entry merge function for D/F conflicts, to be called only after
+ * all files below dir have been processed. We do this because in the
+ * cases we can cleanly resolve D/F conflicts, process_entry() can clean
+ * out all the files below the directory for us.
+ */
+static int process_df_entry(struct merge_options *o,
+ const char *path, struct stage_data *entry)
+{
+ int clean_merge = 1;
+ unsigned o_mode = entry->stages[1].mode;
+ unsigned a_mode = entry->stages[2].mode;
+ unsigned b_mode = entry->stages[3].mode;
+ unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode);
+ unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode);
+ unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode);
+ const char *add_branch;
+ const char *other_branch;
+ unsigned mode;
+ const unsigned char *sha;
+ const char *conf;
+ struct stat st;
+
+ /* We currently only handle D->F cases */
+ assert((!o_sha && a_sha && !b_sha) ||
+ (!o_sha && !a_sha && b_sha));
+
+ entry->processed = 1;
+
+ if (a_sha) {
+ add_branch = o->branch1;
+ other_branch = o->branch2;
+ mode = a_mode;
+ sha = a_sha;
+ conf = "file/directory";
+ } else {
+ add_branch = o->branch2;
+ other_branch = o->branch1;
+ mode = b_mode;
+ sha = b_sha;
+ conf = "directory/file";
+ }
+ if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) {
+ const char *new_path = unique_path(o, path, add_branch);
+ clean_merge = 0;
+ output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. "
+ "Adding %s as %s",
+ conf, path, other_branch, path, new_path);
+ remove_file(o, 0, path, 0);
+ update_file(o, 0, sha, mode, new_path);
+ } else {
+ output(o, 2, "Adding %s", path);
+ update_file(o, 1, sha, mode, path);
+ }
+
+ return clean_merge;
+}
+
void set_porcelain_error_msgs(const char **msgs, const char *cmd)
{
const char *msg;
@@ -1269,6 +1381,13 @@ int merge_trees(struct merge_options *o,
&& !process_entry(o, path, e))
clean = 0;
}
+ for (i = 0; i < entries->nr; i++) {
+ const char *path = entries->items[i].string;
+ struct stage_data *e = entries->items[i].util;
+ if (!e->processed
+ && !process_df_entry(o, path, e))
+ clean = 0;
+ }
string_list_clear(re_merge, 0);
string_list_clear(re_head, 0);
@@ -1456,6 +1575,7 @@ void init_merge_options(struct merge_options *o)
o->buffer_output = 1;
o->diff_rename_limit = -1;
o->merge_rename_limit = -1;
+ o->renormalize = 0;
git_config(merge_recursive_config, o);
if (getenv("GIT_MERGE_VERBOSITY"))
o->verbosity =
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 16:05:17 +0000