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https://jira.codehaus.org/browse/MNG-4226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=305856#comment-305856
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Rob Elliot commented on MNG-4226:
---------------------------------
I just wasted an evening trying to establish why setting the preferred Java
version to Java 7 in Mac's Java Preferences still left Maven using Java 6, due
to this issue. Ant does it the right way, via /usr/libexec/java_home.
Attached is a patch.
> Better detection of JAVA_HOME on Apple Mac OS X
> -----------------------------------------------
>
> Key: MNG-4226
> URL: https://jira.codehaus.org/browse/MNG-4226
> Project: Maven 2 & 3
> Issue Type: Improvement
> Components: Command Line
> Reporter: Alin Dreghiciu
> Fix For: Issues to be reviewed for 3.x
>
> Attachments: MNG-4226-apache-maven.patch
>
>
> On mac JAVA_HOME is detected by using the following code:
> {code}
> if [ -z "$JAVA_VERSION" ] ; then
> JAVA_VERSION="CurrentJDK"
> else
> echo "Using Java version: $JAVA_VERSION"
> fi
> if [ -z "$JAVA_HOME" ] ; then
>
> JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/${JAVA_VERSION}/Home
> fi
> {code}
> But this does not work in collaboration with Using "Java preferences" to
> change the actual java version to use as "CurrentJDK" does not change once
> you update the "java applications" order.
> There is an alternative (at least on Leopard) for determining current java
> home that is based on Java Preferences by using an apple provided script. So,
> as a replacement fo rthe code above the following could be used.
> {code}
> if [ -z "$JAVA_HOME" ] ; then
> JAVA_HOME=`/usr/libexec/java_home | tail -1`
> fi
> {code}
> Could also be taht this is teh first attempt and if fails use the current way
> of determining home.
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