Is there a way to update a jar file in Ant?
EDIT: For example, if I wanted to add some additional files to an already existing JAR file?
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166answers:
2
+7
A:
Sure, that's totally possible. The ant Jar task can do anything the jar command line can do. You do it with the update flag set to true instead of false.
<jar destfile="/x/y/z/file.jar"
basedir="/a/b/c/"
update="true"
/>
Where the destination jar is already in existence at that path.
EDIT: To set a path
<jar destfile="/x/y/z/file.jar"
update="true">
<zipfileset dir="/a/b/c"/ prefix="x/y/z" />
</jar>
justkt
2010-04-27 14:17:29
How does the update operation work? Specifically, if I have a file set in a/b/c/* that I want to add into the jar file x/y/z/* is that possible?
predhme
2010-04-27 14:48:19
Yes, it's definitely possible. Remember - jar is just a specialized zip (for real). If you look at the Ant zip task, the zip even has an update example. So, if you imagine that "filesToAdd" in my example is /a/b/c* and the destfile is x/y/z/file.jar, you should be able to get it to work. Don't believe me? Copy x/y/z/file.jar somewhere and try it with a test ant script and check my work :).
justkt
2010-04-27 14:53:25
To clarify. Assuming I have a file structure of x/y/z in my original jar file. I have some additional files in a/b/c that i want to add into z. Will the update simply add a/b/c to the original jar file. Or can I specify the file path that is used when adding?
predhme
2010-04-27 15:01:35
To specify a path, look at the Jar task docs. It shows you how to do that using filesets. In general the ant task documentation is very good.
justkt
2010-04-27 15:09:01
Many thanks found the zipfileset as you updated your answer. Thanks very much.
predhme
2010-04-27 15:18:25