Stephen Connolly stephenc

For use when you have multiple JVM providers (Apple & Oracle), you want to be able to switch between JDKs for each CLI

usejava ()
{
    local sel=$1.jdk
    if [ -x "/Library/Java/JavaVirtualMachines/jdk$sel/Contents/Home/bin/java" -a ! -x "/Library/Java/JavaVirtualMachines/$1/Contents/Home/bin/java" ]
    then
        sel=jdk$sel
    fi
    local base=/Library/Java/JavaVirtualMachines
    if [ -x "/System/Library/Java/JavaVirtualMachines/$sel/Contents/Home/bin/java" ]
    then
        base=/System/Library/Java/JavaVirtualMachines
    fi
    if [ -z "$1" -o ! -x "$base/$sel/Contents/Home/bin/java" ]
    then
        local prefix="Syntax: usejava "
        for i in /Library/Java/JavaVirtualMachines/* /System/Library/Java/JavaVirtualMachines/*
        do
            if [ -x "$i/Contents/Home/bin/java" ]
            then
                /bin/echo -n "$prefix$(basename $i | sed -e "s/^jdk//;s/\.jdk$//;")"
                prefix=" | "
            fi
        done
        /bin/echo ""
    else
        if [ -z "$JAVA_HOME" ]
        then
            export PATH=$base/$sel/Contents/Home/bin:$PATH
        else
            export PATH=$(echo $PATH|sed -e "s:$JAVA_HOME/bin:$base/$sel/Contents/Home/bin:g")
        fi
        export JAVA_HOME=$base/$sel/Contents/Home
        echo -n -e "\033]0;$(java -version 2>&1 | sed -e "s/.*\"\(.*\)\".*/Java \1/;q")\007"
    fi
}

There is additional fun to be had, given that most Java based launchers that try to fix JAVA_HOME when not set will guess the Apple JVM path… so the following Java program can help

#!/bin/bash

URL="$(svn info | sed -n -e ‘/^URL:/{s/URL: *//p}’)"

ROOT="$(svn info | sed -n -e “/^Repository Root:/{s/Repository Root: *//p}”)"

NEW_PATH="${URL#$ROOT}"

OLD_URL="$(sed -n ‘/< *scm *>/,/< */scm *>/p’ pom.xml | sed -n ‘/< *connection *>/,/< */ *connection *>/{s/.*connection > scm:svn:([^ <])[ <]./\1/p}’)"

OLD_PATH="${OLD_URL#$ROOT}"

echo “OLD URL: $OLD_URL”

echo “NEW URL: $URL”

echo “ROOT: $ROOT”

echo “OLD PATH: $OLD_PATH”

echo “NEW PATH: $NEW_PATH”

sed -i ‘/< *scm *>/,/< */scm *>/{s/’${OLD_PATH////\/}’/’${NEW_PATH////\/}’/}’ pom.xml

OK, so a while back I posted my bash script for selecting the maven version to use for the current session http://s.apache.org/FQ2

Now that I have a Mac for my full time development machine, I thought I would share my version of these functions for Mac users:

usemvn ()

{

if [ -z “$1” -o ! -x “/usr/share/java/maven-$1/bin/mvn” ]

then

local prefix=“Syntax: usemvn "

for i in /usr/share/java/maven-*

do

if [ -x “$i/bin/mvn” ]; then

Works on *nixfind ~/.m2/repository -type d -name *-SNAPSHOT -exec rm -rvf {} ;By searching for the directories we should catch the -YYYYMMDD.HHMMSS format of snapshots also

Cool post I just found:http://coldattic.info/shvedsky/pro/blogs/a-foo-walks-into-a-bar/posts/7