Visualize child commits that are part of a merge commit

bin/git-bc-show-eligible

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+# coding=utf-8
+
+from __future__ import unicode_literals
 
 import subprocess
 import argparse
@@ -96,10 +99,37 @@ if sys.stdout.isatty():
     author_format_str = ' \033[31m| %s <%s>\033[0m'
     commit_format_str = '\033[33m%s\033[0m %s%s'
 
+seen = ''
+groups = []
+current_group = []
 for commit in find_unpicked(repo, from_commit, to_commit, since_commit, args.all):
     author_info = ''
     if args.all:
         author_info = author_format_str % (commit.author.name, commit.author.email)
 
-    print(commit_format_str % (str(commit.id), commit.message[:commit.message.index('\n')],
-                               author_info))
+    commit_msg = commit.message[:commit.message.index('\n')]
+    indent = commit_msg in seen
+    seen += commit.message
+
+    commit_string = (commit_format_str % (str(commit.id), commit_msg, author_info))
+
+    if indent:
+        current_group.append(commit_string)
+    else:
+        if current_group:
+            groups.append(current_group)
+        current_group = [commit_string]
+
+for group in groups:
+    merge = group[0]
+    child_commits = group[1:-1]
+    last_child_commit = group[-1] if len(group) > 1 else ''
+
+    print(merge)
+
+    for child in child_commits:
+       print(" ├─ {}".format(child))
+
+    if last_child_commit:
+       print(" └─ {}".format(last_child_commit))
+