'How to read the Class-Path from a JAR in Ant?

The Class-Path of a JAR is written in the Manifest file in the JAR. The following Bash code reads the Class-Path from a JAR, if it does not exceed the 72 char limit:

unzip -c "$1" META-INF/MANIFEST.MF |
sed -n 's/^Class-Path: \(.\+\)$/\1/p' |
tr -d '\r'

Right now I am calling the code with exec in Ant but I would like to remove all execs.

How to do the same in Ant without using unzip, sed and tr?

ant


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