[PATCH] log: decorate "replaced" on to replaced commits

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Old code also decorates "new" commits with "refs/replace/SHA1". This
is now gone, but I guess no one will miss it.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 2011/8/19 Junio C Hamano <gitster@pobox.com>:
 > If the argument is "we know only commits and tags are listed and blobs and
 > trees are not shown with --decorate option" and "excluding the decoration
 > that we know will never be used will avoid bloating the decorate hashtable
 > with unused cruft", then add_name_decoration() should be doing the check
 > for all of its callers, not just this one, no?

 Makes sense. Moreover replacing blobs and trees are generally not safe.
 If people do that, they may have more issues to worry about than this.
 Let's keep it simple. We can fix add_name_decoration() later if it becomes
 a real problem.

 log-tree.c |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/log-tree.c b/log-tree.c
index e945701..d73e69c 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -92,8 +92,22 @@ static void add_name_decoration(enum decoration_type type, const char *name, str
 
 static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 {
-	struct object *obj = parse_object(sha1);
+	struct object *obj;
 	enum decoration_type type = DECORATION_NONE;
+
+	if (!prefixcmp(refname, "refs/replace/")) {
+		unsigned char original_sha1[20];
+		if (get_sha1_hex(refname + 13, original_sha1)) {
+			warning("invalid replace ref %s", refname);
+			return 0;
+		}
+		obj = parse_object(original_sha1);
+		if (obj)
+			add_name_decoration(DECORATION_GRAFTED, "replaced", obj);
+		return 0;
+	}
+
+	obj = parse_object(sha1);
 	if (!obj)
 		return 0;
 
-- 
1.7.4.74.g639db