old-school patching

I actually can't remember when it was the last time I 'manually' patched a file. But it was quite common in the pre git-days. A patch basically is the same as a git-commit, telling the code where to insert what and where to remove what... As I'm trying to get 'Wood Games 3D' back to life, I first need to get it to compile. Strangely I did not keep my highly altered libgdx-version for some reason only one patch-file. At least I wrote down a date in the file (I guess that meant the day when I created the patch and not the day of its svn-revision). But still a good point to start.

A patch looks like something like this:

Index: src/com/badlogic/gdx/scenes/scene2d/ui/Label.java
===================================================================
--- src/com/badlogic/gdx/scenes/scene2d/ui/Label.java	(revision 2440)
+++ src/com/badlogic/gdx/scenes/scene2d/ui/Label.java	(working copy)
@@ -62,7 +62,7 @@
  *
  */
 public class Label extends Widget {		
-	final LabelStyle style;
+	LabelStyle style;
 	String label;
 	final TextBounds bounds = new TextBounds();
 	final Vector2 textPos = new Vector2();
@@ -139,4 +139,13 @@
 		this.label = text;
 		invalidateHierarchy();
 	}
+	
+	/**
+	 * Sets the {@link LabelStyle} of this Label

In order to apply it to a folder. You need to 'cd' into it and write

patch -p0 < patch.txt

And then pray. 🙂 In my case I had a line ending mismatch resulting in lots of those errors:

Hunk #1 FAILED at 1 (different line endings).
Hunk #2 FAILED at 48 (different line endings).

And it makes sense. I developed the game on windows but I'm working now on my beloved linux. So, I applied dos2unix on both, the whole folder as well as on the patch:

find . -type f -print0 | xargs -0 dos2unix

(This command calls dos2unix on all files from the current folder upwards)

After this, calling the patch-command (as above) just worked. I call this a miracle 🙂

Refs: