Check paths first.

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.2.0
+
+- Updated to not save the cache if one of the required paths does not exist.
+
 # 1.1.0
 
 - Added a `cache-base` input. When provided, will only save cache on this branch/ref, but will

action.yml

@@ -8,7 +8,7 @@ inputs:
     description: 'Comma-separated list of global binaries to install into Cargo.'
   cache:
     description: 'Toggle caching of ~/.cargo/registry and /target/<cache-target> directories.'
-    default: true
+    default: 'true'
   cache-base:
     description:
       'Base branch/ref to save a warmup cache on. Other branches/refs will restore from this base.'
@@ -21,7 +21,7 @@ inputs:
     description: 'Comma-separated list of additional components to install.'
   inherit-toolchain:
     description: 'Inherit all toolchain settings from the rust-toolchain.toml file.'
-    default: false
+    default: 'false'
   targets:
     description: 'Comma-separated list of additional targets to install.'
   profile:

src/cargo.ts

@@ -165,12 +165,21 @@ export async function saveCache() {
 		return;
 	}
 
+	const cachePaths = getCachePaths();
+
+	for (const cachePath of cachePaths) {
+		if (!fs.existsSync(cachePath)) {
+			core.info(`Cache path ${cachePath} does not exist, skipping save`);
+			return;
+		}
+	}
+
 	await cleanCargoRegistry();
 	await cleanTargetProfile();
 
 	core.info(`Saving cache with key ${primaryKey}`);
 
-	await cache.saveCache(getCachePaths(), primaryKey);
+	await cache.saveCache(cachePaths, primaryKey);
 }
 
 export async function restoreCache() {