Does java-diff-utils support patch file with multiple files?

[HuGanghui]

Describe the bug

When using diff command to compare two directories:

diff -u Origin/ Update/ > multiPatch.txt

we get multiPatch.txt:

diff -u Origin/Test1.java Update/Test1.java
--- Origin/Test1.java	2020-06-11 10:48:40.000000000 +0800
+++ Update/Test1.java	2020-06-11 10:48:40.000000000 +0800
@@ -1,7 +1,15 @@
-package checkstyle_demo.PatchSuppression.multiFile.Origin;
+package checkstyle_demo.PatchSuppression.multiFile.Update;
 
 public class Test1 {
     public void test1() {
 
     }
+
+    public void test2() {
+
+    }
+
+    public void test3() {
+
+    }
 }
diff -u Origin/Test2.java Update/Test2.java
--- Origin/Test2.java	2020-06-11 10:48:40.000000000 +0800
+++ Update/Test2.java	2020-06-11 10:48:41.000000000 +0800
@@ -1,7 +1,9 @@
-package checkstyle_demo.PatchSuppression.multiFile.Origin;
+package checkstyle_demo.PatchSuppression.multiFile.Update;
 
 public class Test2 {
     public void test1() {
         System.out.println();
+        System.out.println();
+        System.out.println();
     }
 }

To Reproduce
Steps to reproduce the behavior:

1. Example data
2. simple programm snippet
3. See error

This need more than one file in every directories.
Origin dir:

cat Origin/test1.java

package checkstyle_demo.PatchSuppression.multiFile.Origin;

public class Test1 {
    public void test1() {

    }
}

cat Origin/test2.java

package checkstyle_demo.PatchSuppression.multiFile.Origin;

public class Test2 {
    public void test1() {
        System.out.println();
    }
}

Update dir:

Update/test1.java

package checkstyle_demo.PatchSuppression.multiFile.Update;

public class Test1 {
    public void test1() {

    }

    public void test2() {

    }

    public void test3() {

    }
}

Update/test2.java

package checkstyle_demo.PatchSuppression.multiFile.Update;

public class Test2 {
    public void test1() {
        System.out.println();
        System.out.println();
        System.out.println();
    }
}

run diff command

diff -u Origin/ Update/ > multiPatch.txt

cat multiPatch.txt

diff -u Origin/Test1.java Update/Test1.java
--- Origin/Test1.java	2020-06-11 10:48:40.000000000 +0800
+++ Update/Test1.java	2020-06-11 10:48:40.000000000 +0800
@@ -1,7 +1,15 @@
-package checkstyle_demo.PatchSuppression.multiFile.Origin;
+package checkstyle_demo.PatchSuppression.multiFile.Update;
 
 public class Test1 {
     public void test1() {
 
     }
+
+    public void test2() {
+
+    }
+
+    public void test3() {
+
+    }
 }
diff -u Origin/Test2.java Update/Test2.java
--- Origin/Test2.java	2020-06-11 10:48:40.000000000 +0800
+++ Update/Test2.java	2020-06-11 10:48:41.000000000 +0800
@@ -1,7 +1,9 @@
-package checkstyle_demo.PatchSuppression.multiFile.Origin;
+package checkstyle_demo.PatchSuppression.multiFile.Update;
 
 public class Test2 {
     public void test1() {
         System.out.println();
+        System.out.println();
+        System.out.println();
     }
 }

Expected behavior

And I want to know does java-diff-utils support patch file with multiple files? as far as I know, UnifiedDiffUtils.parseUnifiedDiff function can parse patch file with only one file.

System

• Java version 1.8
• Version

<groupId>io.github.java-diff-utils</groupId>
<artifactId>java-diff-utils</artifactId>
<version>4.5</version>

[wumpz]

The new implementation is useable but not complete. It's in the unified diff package. This one supports multifile patches.

[wumpz]

To be honest, it worked for my needs. So I am happy to improve it with new features and pull requests are welcome as well.

[HuGanghui]

@wumpz Thanks, I will try UnifiedDiffReader.parseUnifiedDiff