jar task: dubious behaviour

[Matthias Pfisterer <Ma...@gmx.de>]

Hi,

I'm using ant 1.2 with the Blackdown jdk1.3.0-FCS. Using the jar task, I
get the following behaviour:

		<jar jarfile="${dist}/jsinfo.jar"
			basedir="${build}"
			manifest="./manifest.mf" />
...works.

		<jar jarfile="${dist}/jsinfo.jar"
			basedir="${build}" />
... gives an error:
/home/matthias/java/jsresources/apps/jsinfo/build.xml:26: Problem
creating jar: ZIP file must have at least one entry
java.util.zip.ZipException: ZIP file must have at least one entry
	at java.util.zip.ZipOutputStream.finish(ZipOutputStream.java:294)
	at java.util.zip.ZipOutputStream.close(ZipOutputStream.java:312)
	at org.apache.tools.ant.taskdefs.Zip.execute(Zip.java)
	at org.apache.tools.ant.Target.execute(Target.java)
	at org.apache.tools.ant.Project.runTarget(Project.java)
	at org.apache.tools.ant.Project.executeTarget(Project.java)
	at org.apache.tools.ant.Project.executeTargets(Project.java)
	at org.apache.tools.ant.Main.runBuild(Main.java)
	at org.apache.tools.ant.Main.main(Main.java)

any ideas?

Matthias

-- 
Matthias Pfisterer	<ma...@gmx.de>

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--------------------------------------------------------------

Re: jar task: dubious behaviour

[Stefan Bodewig <bo...@apache.org>]

Matthias Pfisterer <Ma...@gmx.de> wrote:

> Hi,
> 
> I'm using ant 1.2 with the Blackdown jdk1.3.0-FCS. Using the jar
> task, I get the following behaviour:
> 
> 		<jar jarfile="${dist}/jsinfo.jar"
> 			basedir="${build}"
> 			manifest="./manifest.mf" />
> ...works.
> 
> 		<jar jarfile="${dist}/jsinfo.jar" basedir="${build}" />
>
> 		... gives an error:
> 		/home/matthias/java/jsresources/apps/jsinfo/build.xml:26:
> 		Problem creating jar: ZIP file must have at least one
> 		entry

this probably means Ant either doesn't find ${base} or there is no
content in this directory. You don't get an exception in the first
example as you specify a MANIFEST - so there is something to put into
the archive.

Stefan