From 2e09859cd974e1f2e0ba0146820c87ee8081f569 Mon Sep 17 00:00:00 2001
From: Balakrishnan Balasubramanian <git.user@balki.me>
Date: Sun, 4 Dec 2022 19:21:14 -0500
Subject: [PATCH] guess working

---
 vimtabdiff.py | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/vimtabdiff.py b/vimtabdiff.py
index 08b0c63..64b81d6 100755
--- a/vimtabdiff.py
+++ b/vimtabdiff.py
@@ -4,6 +4,7 @@ import os,sys
 import argparse
 import pathlib
 from pathlib import Path
+import itertools
 
 def parse_args():
     parser = argparse.ArgumentParser(description="Show diff in vim tab pages")
@@ -22,10 +23,33 @@ def get_dir_info(dirname: Path):
             files.append(p)
     return dirs, files
 
+def get_chunks(aItems, bItems):
+    aItems = [(item, 'A') for item in aItems]
+    bItems = [(item, 'B') for item in bItems]
+    items = sorted(aItems + bItems)
+    for name, items in itertools.groupby(items, lambda item: item[0].name):
+        items = list(items)
+        if len(items) == 2:
+            aItem, bItem = items
+            aItem, _ = aItem
+            bItem, _ = bItem
+            yield aItem, bItem
+        else:
+            assert(len(items) == 1)
+            item, = items
+            item, tag = item
+            if tag == 'A':
+                yield item, None
+            else:
+                yield None, item
+
 def get_file_pairs(a, b):
-    aDirs, aFiles = get_dir_info(a)
-    bDirs, bFiles = get_dir_info(b)
-    pass
+    aDirs, aFiles = get_dir_info(Path(a))
+    bDirs, bFiles = get_dir_info(Path(b))
+    print(f"{a=}, {aDirs=}, {aFiles=}, {b=}, {bDirs=}, {bFiles=}")
+    yield from get_chunks(aFiles, bFiles)
+    for aDir, bDir in get_chunks(aDirs, bDirs):
+        yield from get_file_pairs(aDir, bDir)
 
 def main():
     dirs, files = get_dir_info(Path('.'))
@@ -33,6 +57,8 @@ def main():
     args = parse_args()
     print("Helloworld")
     print(f"{args.pathA=} {args.pathB=}")
+    for a, b in get_file_pairs(args.pathA, args.pathB):
+        print(f"{a=}, {b=}")
 
 if __name__ == '__main__':
     main()