From c183d330239c90a797d4d1c6fed5a40c483794b9 Mon Sep 17 00:00:00 2001
From: Javier Gonzalez <xaviergonz@users.noreply.github.com>
Date: Fri, 25 Sep 2020 21:00:03 +0200
Subject: [PATCH] stop roll() from failing if the new cache folder is not
 created (#243)

* stop roll() from failing if the new cache has no files

Today I stumbled upon an error where it would fail when the cache folder was not present
```(typescript) Error: ENOENT: no such file or directory, rename 'REDACTED\node_modules\.cache\rollup-plugin-typescript2/rpt2_759e2fd8d3f20c1a0805faf5404af6bea36632fd/code/cache_' -> 'REDACTED\node_modules\.cache\rollup-plugin-typescript2/rpt2_759e2fd8d3f20c1a0805faf5404af6bea36632fd/code/cache'```

This PR fixes it by checking its existence before trying to rename it

* use existsSync instead of fs.existsSync

* use renameSync instead of fs.renameSync
---
 src/rollingcache.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/rollingcache.ts b/src/rollingcache.ts
index dee19d0..8553438 100644
--- a/src/rollingcache.ts
+++ b/src/rollingcache.ts
@@ -98,6 +98,8 @@ export class RollingCache<DataType> implements ICache<DataType>
 
 		this.rolled = true;
 		removeSync(this.oldCacheRoot);
-		renameSync(this.newCacheRoot, this.oldCacheRoot);
+		if (existsSync(this.newCacheRoot)) {
+			renameSync(this.newCacheRoot, this.oldCacheRoot);
+		}
 	}
 }