Print hashed objects

ugit/cli.py

@@ -1,6 +1,8 @@
-import argparse
 from pathlib import Path
 
+import argparse
+import sys
+
 from . import data
 
 
@@ -18,6 +20,10 @@ def parse_args():
     init_parser = commands.add_parser("init")
     init_parser.set_defaults(func=init)
 
+    cat_file_parser = commands.add_parser("cat-file")
+    cat_file_parser.set_defaults(func=cat_file)
+    cat_file_parser.add_argument("object")
+
     hash_object_parser = commands.add_parser("hash-object")
     hash_object_parser.set_defaults(func=hash_object)
     hash_object_parser.add_argument("file")
@@ -33,3 +39,8 @@ def init(args):
 def hash_object(args):
     with open(args.file, "rb") as f:
         print(data.hash_object(f.read()))
+
+
+def cat_file(args):
+    sys.stdout.flush()
+    sys.stdout.buffer.write(data.get_object(args.object))

ugit/data.py

@@ -15,3 +15,8 @@ def hash_object(data):
     with open(f"{GIT_DIR}/objects/{oid}", "wb") as out:
         out.write(data)
     return oid
+
+
+def get_object(oid):
+    with open(f"{GIT_DIR}/objects/{oid}", "rb") as f:
+        return f.read()