[ImageJ-devel] Maven puzzle

[Tobias Pietzsch]

Hi Curtis 

On 11 Feb 2015, at 17:45, Curtis Rueden <ctrueden at wisc.edu> wrote:

> Hi Tobi,
> 
> > [ERROR]
> > /Users/pietzsch/workspace/BigDataViewer/bigdataviewer-server/src/main/java/bdv/server/BigDataServer.java:[248,46]
> > multi-catch statement is not supported in -source 1.5
> >
> > However, shouldn’t this be already automatically done by setting scijava.jvm.version=1.7???
> 
> Whoa, strange. Especially since it says *1.5*, which is the Maven default...
> 
> Furthermore, I cannot reproduce this problem on my system. Building with Java 6, Java 7 or Java 8 (with JAVA_HOME set accordingly), and with only the scijava.jvm.version set to 1.7, I am able to build the project successfully.
> 
> I pushed some changes to master, so that we can see whether Jenkins has a problem with it.

It turns out, that Jenkins has a problem with it:
http://jenkins.imagej.net/view/BigDataViewer/job/bigdataviewer-server/8/
has the error I reported earlier.
Adding int the maven-compiler-plugin snippet fixed it.
(http://jenkins.imagej.net/view/BigDataViewer/job/bigdataviewer-server/9/)
Probably there was no code to trigger the behaviour on master before.

all the best,
Tobias

> 
> Regards,
> Curtis
> 
> On Wed, Feb 11, 2015 at 9:58 AM, Tobias Pietzsch <pietzsch at mpi-cbg.de> wrote:
> Hi,
> 
> maybe one of the maven experts can shed some light on the following behaviour…
> 
> In my bigdataviewer-server pom.xml file (https://github.com/bigdataviewer/bigdataviewer-server/blob/84b6724ccdefbdcf787f4896a102bc39d415063a/pom.xml)
> I want to set source compatibility to 1.7.
> I tried to do this by specifying
> 	<properties>
> 		<scijava.jvm.version>1.7</scijava.jvm.version>
> 	</properties>
> Strangely, this alone does not solve the problem. mvn on the command line says:
> ...
> INFO] -------------------------------------------------------------
> [ERROR] COMPILATION ERROR :
> [INFO] -------------------------------------------------------------
> [ERROR] /Users/pietzsch/workspace/BigDataViewer/bigdataviewer-server/src/main/java/bdv/server/BigDataServer.java:[248,46] multi-catch statement is not supported in -source 1.5
>   (use -source 7 or higher to enable multi-catch statement)
> …
> 
> I can fix it by additionally putting this snippet:
>  	<build>
> 		<plugins>
> 	        <plugin>
> 	          <artifactId>maven-compiler-plugin</artifactId>
> 	          <configuration>
> 	            <source>1.7</source>
> 	            <target>1.7</target>
> 	          </configuration>
> 	        </plugin>
> 		</plugins>
> 	</build>
> into the pom file.
> However, shouldn’t this be already automatically done by setting scijava.jvm.version=1.7???
> At least Eclipse seems to think so: I fact, the above snippet to configure maven-compiler-plugin I just copied from the “Effective POM” shown in Eclipse (for the pom without explicitly having the snippet of course…)
> 
> Does anyone have an explanation? Is this a maven bug?
> 
> all the best,
> Tobias
> 
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> 
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