replace use of createTempFile with manual naming

app/src/main/java/com/geode/launcher/updater/ReleaseManager.kt

@@ -182,9 +182,10 @@ class ReleaseManager private constructor(
         // clone the file instance as renameTo may move the original file
         val tempFilePath = outputFile.path
 
-        try {
+        val geodeFile = getGeodeOutputPath()
-            val geodeFile = getGeodeOutputPath()
 
+        try {
+            // tempFile should be in same path as geodeFile
             val geodeParent = geodeFile.parentFile
             if (geodeParent != null && !geodeParent.exists()) {
                 geodeParent.mkdirs()
@@ -199,7 +200,7 @@ class ReleaseManager private constructor(
                 onResponse = { body ->
                     DownloadUtils.extractFileFromZipStream(
                         body.byteStream(),
-                        outputFile.outputStream(),
+                        outputFile,
                         geodeFile.name
                     )
 
@@ -397,7 +398,14 @@ class ReleaseManager private constructor(
         val geodeName = LaunchUtils.geodeFilename
         val geodeDirectory = LaunchUtils.getBaseDirectory(applicationContext)
 
-        val tempFile = File.createTempFile(geodeName, null, geodeDirectory)
+        val alphabet = ('A'..'Z') + ('a'..'z') + ('0'..'9')
+        val suffix = buildString(8) {
+            repeat(8) { append(alphabet.random()) }
+        }
+
+        val tmpName = "tmp-$suffix.$geodeName"
+
+        val tempFile = File(geodeDirectory, tmpName)
 
         return tempFile
     }

app/src/main/java/com/geode/launcher/utils/DownloadUtils.kt

@@ -77,23 +77,22 @@ object DownloadUtils {
      *
      * inputStream and outputStream are both closed after this function executes
      */
-    suspend fun extractFileFromZipStream(inputStream: InputStream, outputStream: OutputStream, zipPath: String) {
+    suspend fun extractFileFromZipStream(inputStream: InputStream, output: File, zipPath: String) {
         // note to self: ZipInputStreams are a little silly
         // (runInterruptible allows it to cancel, otherwise it waits for the stream to finish)
         runInterruptible {
-            inputStream.use {
+            inputStream.use { input ->
-                outputStream.use {
+                output.outputStream().use { out ->
                     // nice indentation
-                    val zip = ZipInputStream(inputStream)
+                    ZipInputStream(input).use { zip ->
-                    zip.use {
+                        var entry = zip.nextEntry
-                        var entry = it.nextEntry
                         while (entry != null) {
                             if (entry.name == zipPath) {
-                                it.copyTo(outputStream)
+                                zip.copyTo(out)
                                 return@runInterruptible
                             }
 
-                            entry = it.nextEntry
+                            entry = zip.nextEntry
                         }
 
                         // no matching entries found, throw exception