From efb903303f8000d3262e02df405573585214cae7 Mon Sep 17 00:00:00 2001
From: Paul Gauthier <aider@paulg.org>
Date: Mon, 5 Jun 2023 14:33:38 -0700
Subject: [PATCH] aider: Added `diff_files.py` script that reads two file names
 from the command line, reads the contents of the files, and then uses the
 `difflib` module to print their differences.

# Context:
USER: read 2 files named on the cmd line, use difflib to print their differences
ASSISTANT: To achieve this, we'll create a new Python script that reads two file names from the command line, reads the contents of the files, and then uses the `difflib` module to print their differences.

1. Create a new Python script called `diff_files.py` in the `aider` directory.
2. Import the necessary modules: `sys` and `difflib`.
3. Read the file names from the command line arguments.
4. Read the contents of the files.
5. Use `difflib.unified_diff()` to generate the differences.
6. Print the differences.

Here's the code for the new `diff_files.py` script:

```python
aider/diff_files
^C KeyboardInterrupt
USER: put it in `aider/diffs.py`
---
 aider/diffs.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/aider/diffs.py b/aider/diffs.py
index e69de29bb..621d60c4c 100644
--- a/aider/diffs.py
+++ b/aider/diffs.py
@@ -0,0 +1,23 @@
+import sys
+import difflib
+
+def main():
+    if len(sys.argv) != 3:
+        print("Usage: python diffs.py file1 file2")
+        sys.exit(1)
+
+    file1, file2 = sys.argv[1], sys.argv[2]
+
+    with open(file1, 'r') as f1:
+        content1 = f1.readlines()
+
+    with open(file2, 'r') as f2:
+        content2 = f2.readlines()
+
+    differences = list(difflib.unified_diff(content1, content2, fromfile=file1, tofile=file2))
+
+    for line in differences:
+        sys.stdout.write(line)
+
+if __name__ == "__main__":
+    main()