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From sebb <seb...@gmail.com>
Subject Re: Jenkins: what Java versions are available for building with Maven?
Date Fri, 09 Jan 2015 00:15:24 GMT
On 8 January 2015 at 19:10, Andrew Bayer <andrew.bayer@gmail.com> wrote:
> Yeah, we're moving to installing via puppet all the legacy JDKs etc in
> /home/jenkins/tools from packages, so there is good reason to assume
> they'll always be there. =)

That's good news.
Will they always be at the same path?

If not (or even if so) would it be possible to define properties in
Maven host-global settings.xml that point to the home directories?

Commons Parent uses the convention that

JAVA_1_5_HOME

points to the home directory of Java 1.5

similarly for other Java versions.

These are then used in profiles - e.g. java-1.5 - which override the
java compiler and runtime for compilation and testing.
The variables are also excluded from OSGI builds.
To avoid cluttering the name-space, the variable is only defined if
the profile is selected.

For example:

    <profile>
      <id>java-1.5</id>
      <properties>
        <JAVA_1_5_HOME>${env.JAVA150_HOME}</JAVA_1_5_HOME>
      </properties>
    </profile>
    <profile>
      <id>java-1.6</id>
      <properties>
        <JAVA_1_6_HOME>${env.JAVA160_HOME}</JAVA_1_6_HOME>
      </properties>
    </profile>

The above assumes that the relevant environment variables have been
set, however that is not necessary; the paths can be listed directly,
for example:

        <JAVA_1_5_HOME>/home/jenkins/tools/java/latest1.5</JAVA_1_5_HOME>

Would this be possible?

> A.
>
> On Thu, Jan 8, 2015 at 3:20 AM, sebb <sebbaz@gmail.com> wrote:
>
>> On 8 January 2015 at 11:09, Andreas Lehmkühler <andreas@lehmi.de> wrote:
>> > Hi,
>> >
>> >> sebb <sebbaz@gmail.com> hat am 8. Januar 2015 um 11:05 geschrieben:
>> >>
>> >>
>> >> I have been trying to test Commons Math build on Jenkins.
>> >>
>> >> It runs fine if I choose Java 1.6 latest, however Math currently
>> targets 1.5.
>> >>
>> >> If I try building using Java 1.5, Jenkins complains about class file
>> >> incompatibility.
>> >>
>> >> So it looks like Jenkins needs a minimum of Java 1.6.
>> >> Is that correct?
>> > I guess the issue is maven, newer versions (> 3.0.3 I'm not sure about
>> the
>> > excact version) somehow need a minimum of Java 1.6.
>> >
>>
>> Thanks!
>>
>> I've looked again at the stack trace, and you're correct - it's Maven
>> that is complaining.
>>
>> Meanwhile I've found a way round the issue for Commons projects:
>>
>> -Pjava-1.5 -DJAVA_1_5_HOME=/home/jenkins/tools/java/latest1.5
>>
>> [The java-1.5 profile sets the java version for compile and test
>> assuming that JAVA_1_5_HOME is set appropriatel]
>>
>> So long as 1.5 is always at that location we should be good.
>>
>> >
>> > BR
>> > Andreas Lehmkühler
>>

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