Implement log

ugit/cli.py

@@ -1,7 +1,8 @@
-from pathlib import Path
-
 import argparse
 import sys
+import textwrap
+
+from pathlib import Path
 
 from . import base
 from . import data
@@ -40,6 +41,9 @@ def parse_args():
     commit_parser.set_defaults(func=commit)
     commit_parser.add_argument("-m", "--message", required=True)
 
+    log_parser = commands.add_parser("log")
+    log_parser.set_defaults(func=log)
+
     return parser.parse_args()
 
 
@@ -68,3 +72,15 @@ def read_tree(args):
 
 def commit(args):
     print(base.commit(args.message))
+
+
+def log(args):
+    oid = data.get_HEAD()
+    while oid:
+        commit = base.get_commit(oid)
+
+        print(f"commit {oid}\n")
+        print(textwrap.indent(commit.message, "    "))
+        print("")
+
+        oid = commit.parent