Update README.md

README.md

@@ -90,3 +90,12 @@ manifest {
 
 See Java tutorial
 on [Adding Classes and Jars to Jar File's Classpath](https://docs.oracle.com/javase/tutorial/deployment/jar/downman.html)
+
+## Reading `MANIFEST.MF` from project
+
+Take a look at a [gradle-manifest-plugin-sample](https://github.com/coditory/gradle-manifest-plugin-sample).
+You can copy [ManifestReader.java](https://github.com/coditory/gradle-manifest-plugin-sample/blob/master/src/main/java/com/coditory/sandbox/ManifestReader.java) (with [tests](https://github.com/coditory/gradle-manifest-plugin-sample/blob/master/src/test/groovy/com/coditory/sandbox/ManifestReaderTest.groovy)) to you own project.
+
+Reading `MANIFEST.MF` is tricky. There can be mupltiple `MANIFEST.MF` files on the classpath that comes from libraries.
+To read the correct `MANIFEST.MF` you need to filter them. Most often `Implementation-Title` is used to find the correct one.
+