Allow jt from .spin/bin/env to be used anywhere

Author: chrisseaton

.spin/bin/bootstrap

@@ -1,12 +1,19 @@
 #!/bin/bash
 
 set -ex
-source .spin/bin/env
+
+SCRIPT_PATH=$(dirname "$0")
+SCRIPT_PATH=$(cd "$SCRIPT_PATH" && pwd)
+TRUFFLERUBY_DIR=$SCRIPT_PATH/../..
 
 sudo apt-get install -y cmake libssl-dev libz-dev python
 
+source "$TRUFFLERUBY_DIR"/.spin/bin/env
+
+pushd "$TRUFFLERUBY_DIR"
 jt install jvmci
 jt install eclipse
 jt mx sforceimports
 jt build
 jt ruby --version
+popd

.spin/bin/env

@@ -1,5 +1,11 @@
 #!/bin/bash
 
+SCRIPT_PATH=$(dirname "$0")
+SCRIPT_PATH=$(cd "$SCRIPT_PATH" && pwd)
+TRUFFLERUBY_DIR=$SCRIPT_PATH/../..
+
+unset JAVA_HOME
+
 function jt {
-  ruby tool/jt.rb "$@"
+  ruby "$TRUFFLERUBY_DIR"/tool/jt.rb "$@"
 }