Added Status Message for Amending

gitgud/skills/user_messages.py

@@ -177,3 +177,44 @@ def display_entry(index, human_name, code_name, indent):
                 code_name=item.name,
                 indent=indent
             )
+
+
+def amending_message(before_ref, after_ref, show_hashes=True, show_files=True, show_refs=True):  # noqa: E501
+    file_operator = operations.get_operator()
+    display_data = [
+        {"_name": "Before", "_commit": file_operator.repo.commit(before_ref)},
+        {"_name": "After", "_commit": file_operator.repo.commit(after_ref)}
+    ]
+
+    # Necessary for showing branches
+    if show_refs:
+        tree = file_operator.get_current_tree()
+        referred_by = {}
+        for branch_name in tree['branches']:
+            target = tree['branches'][branch_name]['target']
+            if target not in referred_by:
+                referred_by.update({target: [branch_name]})
+            else:
+                referred_by[target].append(branch_name)
+        for target in referred_by:
+            referred_by[target] = ", ".join(referred_by[target])
+
+    for snapshot in display_data:
+        commit = snapshot["_commit"]
+        snapshot["Message"] = commit.message
+        if show_hashes:
+            snapshot["Hash"] = commit.hexsha[:7]
+        if show_files:
+            files = file_operator.get_commit_content(commit)
+            snapshot["File"] = "Present" if files else "Missing"
+
+    for snapshot in display_data:
+        print(snapshot["_name"], end="")
+        if show_refs:
+            print(" ({}):".format(referred_by[snapshot["_commit"].hexsha]))
+        else:
+            print(":")
+        for feature in snapshot:
+            if not feature.startswith("_"):
+                print(feature + ":", str(snapshot[feature]).strip())
+        print()