Description:

Currently on /etc/profile.d/jre.sh and /etc/profile.d/jre.csh, JAVA_HOME points to:

/usr/lib/jvm/java-default-runtime

If only the openJDK JRE is installed that works quiet well, given one does:

archlinux-java set java-[78]-openjdk/jre

And then that's it. The bin links generated are only the ones on java-[78]-openjdk/jre/bin, which is OK, because only the JRE is installed.

But when the openJDK JDK is installed, and by doing:

archlinux-java set java-[78]-openjdk/jre

ONLY the java-[78]-openjdk/jre/bin links are generated again, missing the ones on the JDK, the java-[78]-openjdk/bin ones.

Notice, by doing:

archlinux-java fix

Then the bin links get generated corrected, as if one would have run instead:

archlinux-java set java-[78]-openjdk

Which means to me, when installing the JDK, one should really set java to the JDK path, and NOT the JRE path, which is done correctly by:

archlinux-java fix

The problem is that by using "fix" instead of "set", or by "setting" to the JDK instead of the JRE, though the links are generated correctly and as expected, that leaves JAVA_HOME incorect, given JAVA_HOME must point to the JRE.

It seems to me whether one installs the JRE only or the JDK, the path java-[78]-openjdk/jre will always exist, and therefore, if one always "sets" archlinux-java to java-[78]-openjdk without "/jre", then things will always work.

So I think all needing fixing is the sh and csh profiles, so that JAVA_HOME always points to java-default-runtime/jre, and when doing so, changing also install_java-common.sh, so that java-default-runtime/jre is also changed there, as well as any other message generator indicating set should be done with java-[78]-openjdk/jre, given it should be java-[78]-openjdk instead for things to work with JDK and JRE both, and of course the documentation on:

https://wiki.archlinux.org/index.php/java

should be changed accordingly. All that so that JAVA_HOME points to java-default-runtime/jre, java-default-runtime points to java-[78]-openjdk, and the links are correctly generated for the JDK when present.

This can be better explained as follows:


++++++++++++++

If:

% sudo archlinux-java fix

Then:

% archlinux-java status
Available Java environments:
java-8-openjdk (default)

% ls -l /usr/bin/java*
lrwxrwxrwx 1 root root 28 Aug 23 00:05 /usr/bin/java -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 28 Aug 23 00:05 /usr/bin/javac -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 28 Aug 23 00:05 /usr/bin/javadoc -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 28 Aug 23 00:05 /usr/bin/javah -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 28 Aug 23 00:05 /usr/bin/javap -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 28 Aug 23 00:05 /usr/bin/java-rmi.cgi -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 33 Aug 21 15:30 /usr/bin/javaws -> /usr/share/icedtea-web/bin/javaws*

But we get the wrong JRE:

% echo $JAVA_HOME
/usr/lib/jvm/java-default-runtime

% ls -l /usr/lib/jvm/java-default-runtime
lrwxrwxrwx 1 root root 14 Aug 22 23:41 /usr/lib/jvm/java-default-runtime -> java-8-openjdk

It should have been instead:

/usr/lib/jvm/java-default-runtime/jre

++++++++++++++

If:

% sudo archlinux-java set java-8-openjdk/jre

Then we get the weird status:

% archlinux-java status
Available Java environments:
java-8-openjdk

% ls -l /usr/bin/java*
lrwxrwxrwx 1 root root 28 Aug 23 00:08 /usr/bin/java -> /usr/lib/java-common-wrapper*
lrwxrwxrwx 1 root root 33 Aug 21 15:30 /usr/bin/javaws -> /usr/share/icedtea-web/bin/javaws*

weird because it doesn't indicate a default java. But most importantly, we don't get the JDK bin links, only a couple of JRE ones. Which is obviousl wrong.

Of course we get the right JRE:

% echo $JAVA_HOME
/usr/lib/jvm/java-default-runtime

% ls -l /usr/lib/jvm/java-default-runtime
lrwxrwxrwx 1 root root 18 Aug 23 00:08 /usr/lib/jvm/java-default-runtime -> java-8-openjdk/jre

When no matter if JRE only or JDK, both would have worked OK with java-default-runtime -> java-8-openjdk if JAVA_HOME had ponted to java-default-runtime/jre instead.

++++++++++++++


One more thing, :-) Instead of calling the link java-default-runtime, if following the recommended fix, then I would call it java-default instead.



Additional info:
* package version(s)

% pacman -Qs openjdk
local/jdk8-openjdk 8.u20-1
local/jre8-openjdk 8.u20-1
local/jre8-openjdk-headless 8.u20-1

% pacman -Qs icedtea-web
local/icedtea-web 1.5.1-1


* config and/or log files etc.

% grep JAVA_HOME /etc/profile.d/jre.*sh
/etc/profile.d/jre.csh:setenv JAVA_HOME "/usr/lib/jvm/java-default-runtime"
/etc/profile.d/jre.sh:export JAVA_HOME=/usr/lib/jvm/java-default-runtime


Steps to reproduce: