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https://issues.apache.org/jira/browse/MNG-6003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269438#comment-15269438
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Hudson commented on MNG-6003:
-----------------------------
SUCCESS: Integrated in maven-3.x #1261 (See
[https://builds.apache.org/job/maven-3.x/1261/])
[MNG-6003] Drastically reduce JAVA_HOME discovery code (michaelo: rev
6c4627bd463dc080cb00c01a27b4ff830cbd5702)
* apache-maven/src/bin/mvn
* apache-maven/src/bin/mvn.cmd
> Drastically reduce JAVA_HOME discovery code
> -------------------------------------------
>
> Key: MNG-6003
> URL: https://issues.apache.org/jira/browse/MNG-6003
> Project: Maven
> Issue Type: Improvement
> Components: Command Line
> Affects Versions: 3.3.9
> Reporter: Michael Osipov
> Assignee: Michael Osipov
> Fix For: 3.4.0
>
>
> Our [installation documentation|https://maven.apache.org/install.html]
> several times requires that {{JAVA_HOME}} is set and points to a valid JDK.
> Though, tens of lines in {{mvn}} and {{mvn.cmd}} perform some magic to
> discover it when it is not set. This completely contradicts our requirement
> that {{JAVA_HOME}} must be set.
> We can drastically reduce this code by checking if {{JAVA_HOME}} is set and
> use it, if not perform {{which java}} and use that to run Maven. Not adhering
> to our requirements is deemed to undefined behavior. A developer must be able
> to set this simple env var properly. In most cases on Unix/Linux OpenJDK is
> installed anyway which means that {{which java}} points to a JDK anyway. For
> instance, the {{JAVA_HOME}} discovery on FreeBSD competely fails and sets it
> to {{/usr/local}} because {{/usr/local/bin/java}} is actually a wrapper
> script.
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