Merge branch 'mg/log-decorate-HEAD' into maint

The "log --decorate" enhancement in Git 2.4 that shows the commit
at the tip of the current branch e.g. "HEAD -> master", did not
work with --decorate=full.

* mg/log-decorate-HEAD:
  log: do not shorten decoration names too early
  log: decorate HEAD with branch name under --decorate=full, too

log-tree.c

@@ -13,6 +13,8 @@
 #include "line-log.h"
 
 static struct decoration name_decoration = { "object names" };
+static int decoration_loaded;
+static int decoration_flags;
 
 static char decoration_colors[][COLOR_MAXLEN] = {
 	GIT_COLOR_RESET,
@@ -92,6 +94,8 @@ static int add_ref_decoration(const char *refname, const unsigned char *sha1, in
 	struct object *obj;
 	enum decoration_type type = DECORATION_NONE;
 
+	assert(cb_data == NULL);
+
 	if (starts_with(refname, "refs/replace/")) {
 		unsigned char original_sha1[20];
 		if (!check_replace_refs)
@@ -121,8 +125,6 @@ static int add_ref_decoration(const char *refname, const unsigned char *sha1, in
 	else if (!strcmp(refname, "HEAD"))
 		type = DECORATION_REF_HEAD;
 
-	if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
-		refname = prettify_refname(refname);
 	add_name_decoration(type, refname, obj);
 	while (obj->type == OBJ_TAG) {
 		obj = ((struct tag *)obj)->tagged;
@@ -146,11 +148,11 @@ static int add_graft_decoration(const struct commit_graft *graft, void *cb_data)
 
 void load_ref_decorations(int flags)
 {
-	static int loaded;
-	if (!loaded) {
-		loaded = 1;
-		for_each_ref(add_ref_decoration, &flags);
-		head_ref(add_ref_decoration, &flags);
+	if (!decoration_loaded) {
+		decoration_loaded = 1;
+		decoration_flags = flags;
+		for_each_ref(add_ref_decoration, NULL);
+		head_ref(add_ref_decoration, NULL);
 		for_each_commit_graft(add_graft_decoration, NULL);
 	}
 }
@@ -196,7 +198,8 @@ static const struct name_decoration *current_pointed_by_HEAD(const struct name_d
 	branch_name = resolve_ref_unsafe("HEAD", 0, unused, &rru_flags);
 	if (!(rru_flags & REF_ISSYMREF))
 		return NULL;
-	if (!skip_prefix(branch_name, "refs/heads/", &branch_name))
+
+	if (!starts_with(branch_name, "refs/"))
 		return NULL;
 
 	/* OK, do we have that ref in the list? */
@@ -209,6 +212,14 @@ static const struct name_decoration *current_pointed_by_HEAD(const struct name_d
 	return NULL;
 }
 
+static void show_name(struct strbuf *sb, const struct name_decoration *decoration)
+{
+	if (decoration_flags == DECORATE_SHORT_REFS)
+		strbuf_addstr(sb, prettify_refname(decoration->name));
+	else
+		strbuf_addstr(sb, decoration->name);
+}
+
 /*
  * The caller makes sure there is no funny color before calling.
  * format_decorations_extended makes sure the same after return.
@@ -246,7 +257,7 @@ void format_decorations_extended(struct strbuf *sb,
 			if (decoration->type == DECORATION_REF_TAG)
 				strbuf_addstr(sb, "tag: ");
 
-			strbuf_addstr(sb, decoration->name);
+			show_name(sb, decoration);
 
 			if (current_and_HEAD &&
 			    decoration->type == DECORATION_REF_HEAD) {
@@ -255,7 +266,7 @@ void format_decorations_extended(struct strbuf *sb,
 				strbuf_addstr(sb, " -> ");
 				strbuf_addstr(sb, color_reset);
 				strbuf_addstr(sb, decorate_get_color(use_color, current_and_HEAD->type));
-				strbuf_addstr(sb, current_and_HEAD->name);
+				show_name(sb, current_and_HEAD);
 			}
 			strbuf_addstr(sb, color_reset);
 

t/t4013/diff.log_--decorate=full_--all

@@ -5,7 +5,7 @@ Date:   Mon Jun 26 00:06:00 2006 +0000
 
     Rearranged lines in dir/sub
 
-commit 59d314ad6f356dd08601a4cd5e530381da3e3c64 (HEAD, refs/heads/master)
+commit 59d314ad6f356dd08601a4cd5e530381da3e3c64 (HEAD -> refs/heads/master)
 Merge: 9a6d494 c7a2ab9
 Author: A U Thor <author@example.com>
 Date:   Mon Jun 26 00:04:00 2006 +0000