> On Apr 29, 2015, at 2:41 PM, David DeHaven <david.deha...@oracle.com> wrote:
>
>> It was suggested on the jigsaw-dev list that I raise this issue here.
>> The jeps command appears to have no /usr/bin symlink.
>>
>> which jdeps
>> /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/jdeps
>>
>> I believe this command was introduced with JDK 8.
>>
>> One thing that I considered a minor issue is that this misses the JDK 9
>> early access I have installed.
>>
>> It was indicated by Mandy Chung on the jigsaw-dev list that...
>>> /usr/bin/j* are linked to
>>> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands
>>> probably part of OS install and I guess it's a snapshot of JDK 7
>>> commands.
>>
>> If this is true, ‘part of OS install’, I would guess they may not of even
>> been updated for JDK 7, and no new Java commands from Java 6 on will ever
>> have OS X /usr/bin links going forward.
>
> We had one added for jmc, IIRC that's the last tool we've requested. The
> issue with the stub Java tools in /usr/bin is they're maintained by Apple, so
> if we add or remove tools it gets out of sync and worse yet is entirely
> dependent on when or even IF Apple releases a Java update for that particular
> OS version, which on older systems is not guaranteed to happen.
>
>
> My solution is to put this in ~/.profile and skip using the stub tools in
> /usr/bin:
> --- cut here ---
> # add to front of path
> prepend_path() {
> if ! eval test -z "\"\${$1##*:$2:*}\"" -o -z "\"\${$1%%*:$2}\"" -o -z
> "\"\${$1##$2:*}\"" -o -z "\"\${$1##$2}\"" ; then
> eval "$1=$2:\$$1"
> fi
> }
>
> export JDK_HOME=`/usr/libexec/java_home -v 1.8`
> prepend_path PATH "${JDK_HOME}/bin"
> --- cut here ---
>
> Prepending it overrides the stub tools in /usr/bin. You're free to set
> whatever path you want for JDK_HOME, but if you use java_home then you don't
> have to manually juggle links or variables to track it.
>
>
> This also allows javapackager to be run without scraping up a path first :)
>
>
> Using PATH tools, you can change which JDK you use on the fly:
> --- cut here ---
> # add to front of path
> prepend_path() {
> if ! eval test -z "\"\${$1##*:$2:*}\"" -o -z "\"\${$1%%*:$2}\"" -o -z
> "\"\${$1##$2:*}\"" -o -z "\"\${$1##$2}\"" ; then
> eval "$1=$2:\$$1"
> fi
> }
>
> # removes a path
> remove_path() {
> eval "$1=$(eval echo \$$1 | tr -s ":" "\n" | grep -vwE "($2)" | tr -s "\n"
> ":" | sed "s/:$//")"
> }
>
> # check if the given dir is already in the path, returns 1 or 0
> check_path() {
> test `echo $PATH | grep --quiet -v "$1"`
> }
>
> # JDK path functions
> switch_jdk() {
> NEW_JDK_HOME=$1
> test -d "${NEW_JDK_HOME}/bin" || {
> echo "Invalid JDK path"
> return
> }
>
> check_path "${NEW_JDK_HOME}/bin" && return
>
> test -n "${JDK_HOME}" && {
> remove_path PATH "${JDK_HOME}/bin"
> }
>
> eval JDK_HOME="${NEW_JDK_HOME}"
> prepend_path PATH "${JDK_HOME}/bin"
> }
>
> find_jdk() {
> # usage: find_jdk <version>
> FOO=`/usr/libexec/java_home -F -v $1 2>/dev/null`
> test -z "$FOO" && {
> echo "No JDK for version $1 found."
> return
> }
> switch_jdk "$FOO"
> }
>
> # default to the latest JDK 8
> find_jdk 1.8
>
> --- cut here ---
>
>
> -DrD-
Please file a bug at <http://bugreporter.apple.com> asking for this command to
be added to /usr/bin, and send me the bug ID. We can ensure that these stubs
are in the base OS without any Apple Java being installed.
Thanks,
Mike Swingler
Apple Inc.
