blame: require 0 context lines while finding moved lines with -M

The core part of git blame -M required 1 context line, but
there is no rationale to be found in the code; it causes artifacts
like discussed in the thread:

  <http://thread.gmane.org/gmane.comp.version-control.git/255289/>.

<http://permalink.gmane.org/gmane.comp.version-control.git/295795>
sheds some more light on the history of the previous choice.

Signed-off-by: David Kastrup <dak@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
David Kastrup 2016-05-28 11:13:53 +02:00 committed by Junio C Hamano
parent 7777322816
commit 17a07e2ae2

View file

@ -134,7 +134,7 @@ struct progress_info {
int blamed_lines;
};
static int diff_hunks(mmfile_t *file_a, mmfile_t *file_b, long ctxlen,
static int diff_hunks(mmfile_t *file_a, mmfile_t *file_b,
xdl_emit_hunk_consume_func_t hunk_func, void *cb_data)
{
xpparam_t xpp = {0};
@ -142,7 +142,6 @@ static int diff_hunks(mmfile_t *file_a, mmfile_t *file_b, long ctxlen,
xdemitcb_t ecb = {NULL};
xpp.flags = xdl_opts;
xecfg.ctxlen = ctxlen;
xecfg.hunk_func = hunk_func;
ecb.priv = cb_data;
return xdi_diff(file_a, file_b, &xpp, &xecfg, &ecb);
@ -980,7 +979,7 @@ static void pass_blame_to_parent(struct scoreboard *sb,
fill_origin_blob(&sb->revs->diffopt, target, &file_o);
num_get_patch++;
if (diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d))
if (diff_hunks(&file_p, &file_o, blame_chunk_cb, &d))
die("unable to generate diff (%s -> %s)",
oid_to_hex(&parent->commit->object.oid),
oid_to_hex(&target->commit->object.oid));
@ -1129,7 +1128,7 @@ static void find_copy_in_blob(struct scoreboard *sb,
* file_p partially may match that image.
*/
memset(split, 0, sizeof(struct blame_entry [3]));
if (diff_hunks(file_p, &file_o, 1, handle_split_cb, &d))
if (diff_hunks(file_p, &file_o, handle_split_cb, &d))
die("unable to generate diff (%s)",
oid_to_hex(&parent->commit->object.oid));
/* remainder, if any, all match the preimage */