build(desugaring): enable desugaring for InputStream.transferTo(OutputStream) in JGit

Author: itsaky

composite-builds/build-deps-common/desugaring-core/src/main/java/com/itsaky/androidide/desugaring/core/java/io/DesugarInputStream.java

@@ -19,6 +19,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -119,10 +120,23 @@ public static int readNBytes(InputStream input, byte[] b, int off, int len) thro
     int n = 0;
     while (n < len) {
       int count = input.read(b, off + n, len - n);
-      if (count < 0)
+      if (count < 0) {
         break;
+      }
       n += count;
     }
     return n;
   }
+
+  public static long transferTo(InputStream in, OutputStream out) throws IOException {
+    Objects.requireNonNull(out, "out");
+    long transferred = 0;
+    byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
+    int read;
+    while ((read = in.read(buffer, 0, DEFAULT_BUFFER_SIZE)) >= 0) {
+      out.write(buffer, 0, read);
+      transferred += read;
+    }
+    return transferred;
+  }
 }

composite-builds/build-logic/desugaring/src/main/java/com/itsaky/androidide/desugaring/dsl/ReplaceMethodInsnKey.kt

@@ -17,6 +17,8 @@
 
 package com.itsaky.androidide.desugaring.dsl
 
+import java.io.Serializable
+
 /**
  * Key for storing [ReplaceMethodInsnKey] instances in a map.
  *
@@ -26,4 +28,7 @@ data class ReplaceMethodInsnKey(
   val className: String,
   val methodName: String,
   val methodDescriptor: String
-)
+) : Serializable {
+  @JvmField
+  val serialVersionUID = 1L
+}

composite-builds/build-logic/desugaring/src/main/java/com/itsaky/androidide/desugaring/utils/JavaIOReplacements.kt

@@ -59,5 +59,10 @@ object JavaIOReplacements {
       InputStream::readAllBytes.javaMethod!!,
       DesugarInputStream::readAllBytes.javaMethod!!
     )
+
+    replaceMethod(
+      InputStream::transferTo.javaMethod!!,
+      DesugarInputStream::transferTo.javaMethod!!
+    )
   }
 }