Switching between Icon and Unicon is similar -- it would involve switching
the PATH,
and probably switching IPATH and LPATH, or switching between having them set
(for Icon, typically) and unsetting them (for Unicon).
Clint
On Fri, Apr 9, 2010 at 8:11 AM, Steve Wampler <[email protected]> wrote:
> David Gamey wrote:
> > And is there an easy way to reference both?
>
> Define "easy". :)
>
> I have to run tests using several versions of Java and
> so took some time to set up some Z-shell functions to
> make switching between them easier. But this is on
> Linux (and zsh, obviously) and I've never looked at
> other environments.
>
> I can switch between java versions with a single command.
> For example, to use Sun's JDK 1.6, I type:
>
> -> jset6
>
> and then just run 'javac' and 'java' normally (including
> from inside other scripts).
>
> Here's the jset6 function:
> -------------------------------------------
> #(name) jset6 - set up for using Java 1.6
> jset6() {
> if [ -z "${CLASSPATH_PREFIX}" ]; then
> setenv CLASSPATH_PREFIX "."
> fi
> if [ ! -z "${JAVA_HOME}" ]; then
> # Clear remnants of previous JAVA
> delenvp PATH ${JAVA_HOME}
> delenvp CLASSPATH ${CLASSPATH_PREFIX}
> delenvp CLASSPATH ${JAVA_HOME}
> fi
> setenv JAVA6 /opt/java6
> setenv JAVA_HOME=$JAVA6
> addenv CLASSPATH ${JAVA_HOME}/jre/lib/jrt.lib
> addenv CLASSPATH ${CLASSPATH_PREFIX}
> addenv PATH ${JAVA_HOME}/bin
> }
> -------------------------------------------
>
> setenv, delenvp, and addenv are the functions that do
> the heavy listing (well, delenvp and addenv are, setenv
> just wraps 'export' so the call aligns with the other two).
>
> delenvp removes all 'path' entries containing the 2nd argument from the
> value of the variable named in the first argument. Here, "path entries"
> are assumed to be colon separated.
>
> addenv prepends the second argument as a path entry on the value of
> of the variable named in the first argument, *provided* that entry
> isn't already on the PATH somewhere.
>
> I have similar functions jset4 and jset5.
>
> Given the primitive functions, it would be easy to do something
> similar to allow switching between Icon and Unicon. (I use them
> to switch among other tasks as well as switching versions of Java.)
>
> If you're curious about the implementations of addenv and delenvp
> I can pass those on, but they are pretty zsh-specific. I have no
> idea what it would take to do something similar with a different
> shell [or under Windows].
>
>
> --
> Steve Wampler -- [email protected]
> The gods that smiled on your birth are now laughing out loud.
>
>
> ------------------------------------------------------------------------------
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