Fix some bugs

libwyag.py

@@ -581,14 +581,14 @@ def ls_tree(repo, ref, recursive=None, prefix=""):
             type = item.mode[0:2]
 
         match type:
-            case b'04': raise Exception("Trees should point to subcommits, not other trees")
+            case b'04': type = "tree"
             case b'10': type = "blob"
             case b'12': type = "blob" # a symlink
             case b'16': type = "commit" # a submodule
             case b'sc': type = "subcommit"
             case _: raise Exception(f"Weird tree leaf mode {item.mode}")
 
-        if not (recursive and type=='subcommit'): # This is a leaf
+        if not (recursive and type=='tree'): # This is a leaf
             print("{0} {1} {2}\t{3}".format(
                 "0" * (6 - len(item.mode)) + item.mode.decode("ascii"),
                 # Git's ls-tree displays the type
@@ -597,10 +597,12 @@ def ls_tree(repo, ref, recursive=None, prefix=""):
                 item.sha,
                 join_path(prefix, item.path)
             ))
-        else: # This is a subcommit
+            if type=='subcommit':
                 commit_obj = object_read(repo, item.sha)
                 tree_sha = commit_obj.kvlm[b'tree'].decode("ascii")
                 ls_tree(repo, tree_sha, recursive, join_path(prefix, item.path))
+        else: # This is a tree
+            ls_tree(repo, item.sha, recursive, join_path(prefix, item.path))
 
 
 argsp = argsubparsers.add_parser("checkout", help="Checkout a commit inside of a directory.")
@@ -1119,7 +1121,7 @@ def tree_to_dict(repo, ref, prefix=""):
         if (leaf.mode.startswith(b'04')):
             raise Exception("Tree should not be child of tree")
 
-        is_subcommit = leaf.mode.startswitch(b'sc')
+        is_subcommit = leaf.mode.startswith(b'sc')
 
         # Depending on the type, we either store the path (if it's a
         # blob, so a regular file), or recurse (if it's another tree,
@@ -1386,9 +1388,10 @@ def create_commit_map(repo, commit):
 
 def create_commit_map_recurse(repo, commit, commit_map, path):
     """From a root commit, walk down the tree of subcommits. Returns a dict mapping
-    directory paths to commit objects. Note: doesn't include root commit."""
+    directory paths to (commit hash, commit objects).
+    Note: doesn't include root commit."""
 
-    tree_sha = commit.kvlm["tree"].decode('ascii')
+    tree_sha = commit.kvlm[b"tree"].decode('ascii')
     obj = object_read(repo, tree_sha)
     for item in obj.items:
         if len(item.mode) == 5:
@@ -1405,9 +1408,12 @@ def create_commit_map_recurse(repo, commit, commit_map, path):
             case _: raise Exception(f"Weird tree leaf mode {item.mode}")
 
         if type == "subcommit":
+            if path == "":
+                fullpath = item.path
+            else:
                 fullpath = f"{path}/{item.path}"
             subcommit = object_read(repo, item.sha)
-            commit_map[fullpath] = subcommit
+            commit_map[fullpath] = (item.sha, subcommit)
 
             create_commit_map_recurse(repo, subcommit, commit_map, fullpath)
 
@@ -1450,24 +1456,31 @@ def tree_from_index(repo, index, commit_map, author, commit_time, message):
                 leaf_mode = f"{entry.mode_type:02o}{entry.mode_perms:04o}".encode("ascii")
                 leaf = GitTreeLeaf(mode=leaf_mode, path=os.path.basename(entry.name), sha=entry.sha)
             else: # Tree. We've stored it as a pair: (basename, SHA)
-                leaf = GitTreeLeaf(mode=b"040000", path=entry[0], sha=entry[1])
+                leaf = GitTreeLeaf(mode=b"sc0000", path=entry[0], sha=entry[1])
 
             tree.items.append(leaf)
 
         sha = object_write(tree, repo)
 
-        subcommit = commit_map[path]
+        if path in commit_map:
+            (subcommit_hash, subcommit) = commit_map[path]
+        else:
+            subcommit = None
 
+        if subcommit == None or subcommit.kvlm[b'tree'] != sha.encode('ascii'):
             new_subcommit = commit_create(repo,
                                         sha,
                                         subcommit,
                                         author,
                                         commit_time,
                                         message)
+        else:
+            # Problem, subcommit is not a hash, but we need a hash
+            new_subcommit = subcommit_hash
 
         parent = os.path.dirname(path).replace("\\", "/")
         base = os.path.basename(path)
-        contents[parent].append((base, sha))
+        contents[parent].append((base, new_subcommit))
 
     return sha
 
@@ -1495,7 +1508,8 @@ def commit_create(repo, tree, parent, author, timestamp, message):
 def cmd_commit(args):
     repo = repo_find()
     index = index_read(repo)
-    root_commit = object_find(repo, "HEAD")
+    root_commit_sha = object_find(repo, "HEAD")
+    root_commit = object_read(repo, root_commit_sha)
 
     commit_time = datetime.now()
     author = gitconfig_user_get(gitconfig_read())
@@ -1511,7 +1525,7 @@ def cmd_commit(args):
 
     commit = commit_create(repo,
                            tree,
-                           root_commit,
+                           root_commit_sha,
                            author,
                            commit_time,
                            args.message)