Fix issue with cache misses on Windows due to updating cl mtime (#388)

 Fix windows cache misses due to updating cl mtime 

fixes #387

Author: Andrej730

dist/restore/index.js

@@ -66466,7 +66466,8 @@ async function configure(ccacheVariant, platform) {
         await execShell(`ccache --set-config=cache_dir='${cacheDir(ccacheVariant)}'`);
         await execShell(`ccache --set-config=max_size='${maxSize}'`);
         await execShell(`ccache --set-config=compression=true`);
-        if (platform === "darwin") {
+        if (platform === "darwin" || platform === "win32") {
+            // On Windows mtime will be different depending on the Visual Studio installation time, making it unreliable.
             await execShell(`ccache --set-config=compiler_check=content`);
         }
         if (lib_core.getBooleanInput("create-symlink")) {

src/restore.ts

@@ -54,7 +54,8 @@ async function configure(ccacheVariant : string, platform : string) : Promise<vo
     await execShell(`ccache --set-config=cache_dir='${cacheDir(ccacheVariant)}'`);
     await execShell(`ccache --set-config=max_size='${maxSize}'`);
     await execShell(`ccache --set-config=compression=true`);
-    if (platform === "darwin") {
+    if (platform === "darwin" || platform === "win32") {
+      // On Windows mtime will be different depending on the Visual Studio installation time, making it unreliable.
       await execShell(`ccache --set-config=compiler_check=content`);
     }
     if (core.getBooleanInput("create-symlink")) {