From d32a11a909715695329dfea0dd5cd244dd25a99c Mon Sep 17 00:00:00 2001
From: Ashley Milsted <ashmilsted@gmail.com>
Date: Mon, 11 Dec 2023 15:46:09 -0800
Subject: [PATCH] Only write meta if changed

---
 src/juliapkg/deps.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/juliapkg/deps.py b/src/juliapkg/deps.py
index e115678..7389ae9 100644
--- a/src/juliapkg/deps.py
+++ b/src/juliapkg/deps.py
@@ -30,6 +30,13 @@ def save_meta(meta):
     assert meta.get('meta_version') == META_VERSION
     fn = STATE['meta']
     os.makedirs(os.path.dirname(fn), exist_ok=True)
+    if os.path.exists(fn):
+        with open(fn) as fp:
+            old_meta_json = fp.read()
+        meta_json = json.dumps(meta)
+        if meta_json == old_meta_json:
+            # No need to write out if nothing changed
+            return
     with open(fn, 'w') as fp:
         json.dump(meta, fp)