From aea23c4fca0ad715720d870273f6b7bed1f5376b Mon Sep 17 00:00:00 2001
From: Anthony Sottile <asottile@umich.edu>
Date: Sat, 13 Jun 2020 12:58:38 -0700
Subject: [PATCH] do not save the cache if it was restored

---
 index.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index 1d45918..bbb6a43 100644
--- a/index.js
+++ b/index.js
@@ -51,9 +51,11 @@ async function main() {
     const cachePaths = [path.join(os.homedir(), '.cache', 'pre-commit')];
     const py = getPythonVersion();
     const cacheKey = `pre-commit-2-${hashString(py)}-${hashFile('.pre-commit-config.yaml')}`;
-    await cache.restoreCache(cachePaths, cacheKey);
+    const restored = await cache.restoreCache(cachePaths, cacheKey);
     const ret = await exec.exec('pre-commit', args, {ignoreReturnCode: push});
-    await cache.saveCache(cachePaths, cacheKey);
+    if (!restored) {
+        await cache.saveCache(cachePaths, cacheKey);
+    }
 
     if (ret && push) {
         // actions do not run on pushes made by actions.