We should check for more than two args as we have two blob ids:

  $ got diff 66173f9f4759b015a8 dae7c1789fc137c1b6927dca
  got: path arguments cannot be used when diffing blobs

With the below diff:

  $ got diff 66173f9f4759b015a8 dae7c1789fc137c1b6927dca
  blob - 66173f9f4759b015a8e2f0f9acc21194830f066d
  blob + dae7c1789fc137c1b6927dca65e7f44b457d1e34
  --- 66173f9f4759b015a8e2f0f9acc21194830f066d
  +++ dae7c1789fc137c1b6927dca65e7f44b457d1e34
  @@ -21,6 +21,14 @@ got:
     This must require an up-to-date and clean work tree to avoid unrelated
     changes from getting mixed in. Perform an implicit work tree base-commit
     bump after committing, like 'got rebase' and 'got histedit' do it.
  +- Respect the current umask when creating or changing files and directories
  +  in the work tree. This behaviour is already documented in got-worktree(5)
  +  but not actually implemented.
  +- When a clone fails the HEAD symref will always point to "refs/heads/main"
  +  (ie. the internal default HEAD symref of Got). Resuming a failed clone with
  +  'got fetch' is supposed to work. To make this easier, if the HEAD symref
  +  points to a non-existent reference it should be updated by 'got fetch'
  +  to match the HEAD symref sent by the server.
  
   network protocol:
   - add http(s) transport with libtls, speaking the two Git HTTP protocols


diff /home/mark/src/got
commit - f0680473a7db1e5941bffdc2ab5f80ddec209122
path + /home/mark/src/got
blob - f9bcb1bca8436bc052e3bdeab3be53a13add0a61
file + got/got.c
--- got/got.c
+++ got/got.c
@@ -5157,7 +5157,7 @@ cmd_diff(int argc, char *argv[])
 		error = got_error(GOT_ERR_OBJ_TYPE);
 		goto done;
 	}
-	if (type1 == GOT_OBJ_TYPE_BLOB && argc > 0) {
+	if (type1 == GOT_OBJ_TYPE_BLOB && argc > 2) {
 		error = got_error_msg(GOT_ERR_OBJ_TYPE,
 		    "path arguments cannot be used when diffing blobs");
 		goto done;

-- 
Mark Jamsek <fnc.bsdbox.org>
GPG: F2FF 13DE 6A06 C471 CA80  E6E2 2930 DC66 86EE CF68