Add upgrade check cache to improve the CLI start up speed and reduce …

…the # of calls to github

src/Ellosoft.AwsCredentialsManager/Infrastructure/Upgrade/UpgradeService.cs

@@ -50,6 +50,9 @@ public async Task TryUpgradeApp()
     {
         try
         {
+            if (!ShouldCheckForUpgrade())
+                return;
+
             var currentAppVersion = _appMetadata.GetAppVersion();
 
             if (currentAppVersion is null)
@@ -167,4 +170,33 @@ private static HttpClient CreateHttpClient()
 
         return httpClient;
     }
+
+    private static bool ShouldCheckForUpgrade()
+    {
+        var upgradeCheck = AppDataDirectory.GetPath("version_check.txt");
+
+        var lastUpgradeCheckDateUtc = ReadLastUpgradeCheckDate();
+
+        if (lastUpgradeCheckDateUtc is null || lastUpgradeCheckDateUtc < DateTime.UtcNow.AddDays(-1))
+        {
+            File.WriteAllText(upgradeCheck, DateTime.UtcNow.ToBinary().ToString());
+
+            return true;
+        }
+
+        return false;
+
+        DateTime? ReadLastUpgradeCheckDate()
+        {
+            if (!File.Exists(upgradeCheck))
+                return null;
+
+            var lastUpgradeCheckValue = File.ReadAllText(upgradeCheck);
+
+            if (!long.TryParse(lastUpgradeCheckValue, out var lastUpgradeCheckBinaryDateUtc))
+                return null;
+
+            return DateTime.FromBinary(lastUpgradeCheckBinaryDateUtc);
+        }
+    }
 }