[PATCH] Pull misc objects

Make pull fetch whatever is specified, parse it to figure out what it is, and
then process it appropriately. This also supports getting tag objects, and
getting whatever they tag.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

pull.c

@@ -3,6 +3,8 @@
 #include "cache.h"
 #include "commit.h"
 #include "tree.h"
+#include "tag.h"
+#include "blob.h"
 #include "refs.h"
 
 const char *write_ref = NULL;
@@ -57,6 +59,8 @@ static int make_sure_we_have_it(const char *what, unsigned char *sha1)
 	return status;
 }
 
+static int process_unknown(unsigned char *sha1);
+
 static int process_tree(unsigned char *sha1)
 {
 	struct tree *tree = lookup_tree(sha1);
@@ -115,6 +119,35 @@ static int process_commit(unsigned char *sha1)
 	return 0;
 }
 
+static int process_tag(unsigned char *sha1)
+{
+	struct tag *obj = lookup_tag(sha1);
+
+	if (parse_tag(obj))
+		return -1;
+	return process_unknown(obj->tagged->sha1);
+}
+
+static int process_unknown(unsigned char *sha1)
+{
+	struct object *obj;
+	if (make_sure_we_have_it("object", sha1))
+		return -1;
+	obj = parse_object(sha1);
+	if (!obj)
+		return error("Unable to parse object %s", sha1_to_hex(sha1));
+	if (obj->type == commit_type)
+		return process_commit(sha1);
+	if (obj->type == tree_type)
+		return process_tree(sha1);
+	if (obj->type == blob_type)
+		return 0;
+	if (obj->type == tag_type)
+		return process_tag(sha1);
+	return error("Unable to determine requirement of type %s for %s",
+		     obj->type, sha1_to_hex(sha1));
+}
+
 static int interpret_target(char *target, unsigned char *sha1)
 {
 	if (!get_sha1_hex(target, sha1))
@@ -142,7 +175,7 @@ int pull(char *target)
 	if (interpret_target(target, sha1))
 		return error("Could not interpret %s as something to pull",
 			     target);
-	if (process_commit(sha1))
+	if (process_unknown(sha1))
 		return -1;
 	
 	if (write_ref) {