From 0834920d970dc54504b9053ef66b2d018ab288ee Mon Sep 17 00:00:00 2001
From: Denis Shilin <d.shilin@hydra-billing.com>
Date: Tue, 27 May 2025 18:20:32 +0300
Subject: [PATCH] Preserve history, simplify banner

---
 README.md         |  1 +
 hyaml/__init__.py | 12 +++++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 222f401..2ed5a47 100644
--- a/README.md
+++ b/README.md
@@ -242,6 +242,7 @@ $ hyaml
 True
 >>>
 ```
+Your command history is stored in the `~/.hyaml_history` file.
 
 ## ANTLR
 
diff --git a/hyaml/__init__.py b/hyaml/__init__.py
index 86e1abe..f0dca10 100644
--- a/hyaml/__init__.py
+++ b/hyaml/__init__.py
@@ -1,4 +1,6 @@
 def main():
+    import os
+    import readline
     from hyaml.translator import translate
     from hyaml.compiler import compile_expression
     from code import interact
@@ -7,4 +9,12 @@ def evaluate(expr, **lcls):
         fn = compile_expression(expr, bindings=("variables",))
         return fn(variables=lcls)
 
-    interact(local={"evaluate": evaluate, "translate": translate})
+    histfile = os.path.join(os.path.expanduser("~"), ".hyaml_history")
+    try:
+        readline.read_history_file(histfile)
+    except FileNotFoundError:
+        pass
+
+    interact(banner="HYAML Playgroud", local={"evaluate": evaluate, "translate": translate})
+
+    readline.write_history_file(histfile)