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Merge branch 'jn/merge-renormalize'

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* jn/merge-renormalize:
  merge-recursive --renormalize
  rerere: never renormalize
  rerere: migrate to parse-options API
  t4200 (rerere): modernize style
  ll-merge: let caller decide whether to renormalize
  ll-merge: make flag easier to populate
  Documentation/technical: document ll_merge
  merge-trees: let caller decide whether to renormalize
  merge-trees: push choice to renormalize away from low level
  t6038 (merge.renormalize): check that it can be turned off
  t6038 (merge.renormalize): try checkout -m and cherry-pick
  t6038 (merge.renormalize): style nitpicks
  Don't expand CRLFs when normalizing text during merge
  Try normalizing files to avoid delete/modify conflicts when merging
  Avoid conflicts when merging branches with mixed normalization

Conflicts:
	builtin/rerere.c
	t/t4200-rerere.sh
This commit is contained in:
Junio C Hamano
2010-09-03 09:43:41 -07:00
parent 22ffc39a03 7610fa57e6
commit 8aed4a5e38
18 changed files with 780 additions and 165 deletions
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57
merge-recursive.c
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@ -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);
@ -1062,6 +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)
@ -1071,6 +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;
@ -1082,8 +1132,8 @@ static int process_entry(struct merge_options *o,
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)
@ -1525,6 +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 =