From 5cd0a70d0ec8092b8a82e9ce5f01dccba6d4efef Mon Sep 17 00:00:00 2001
From: artdeell <ultramaksim@gmail.com>
Date: Fri, 3 May 2024 21:01:00 +0300
Subject: [PATCH] Feat[download]: don't always redowload files with missing
 hashes

---
 .../main/java/net/kdt/pojavlaunch/utils/DownloadUtils.java  | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/DownloadUtils.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/DownloadUtils.java
index 367b415d1..b4df71409 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/DownloadUtils.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/DownloadUtils.java
@@ -137,7 +137,11 @@ public class DownloadUtils {
 
     public static <T> T ensureSha1(File outputFile, @Nullable String sha1, Callable<T> downloadFunction) throws IOException {
         // Skip if needed
-        if(sha1 == null) return downloadFile(downloadFunction);
+        if(sha1 == null) {
+            // If the file exists and we don't know it's SHA1, don't try to redownload it.
+            if(outputFile.exists()) return null;
+            else return downloadFile(downloadFunction);
+        }
 
         int attempts = 0;
         boolean fileOkay = verifyFile(outputFile, sha1);