TextMate: On the fly JavaScript evaluation with Rhino
For those interested in developing JavaScript outside the browser, Rhino is one of the natural choices. It seems to combine the best of both the dynamicaly and statically typed worlds. Rhino offers a Shell for dynamic script evaluation, along with the option to compile the scripts into Java classes and reap any advantages compiled software has on display. It's a mature platform, built with performance in mind, leveraging a robust VM.
In order to evaluate scripts using Rhino in
TextMate
in a similar fashion to that of the Run command ("cmd R") from the Ruby Bundle:
Provided that Java is installed on the system and the
$JAVA_HOME
environment variable has been set,
download Rhino,
unpack it somewhere and set an environment variable ($RHINO_HOME) to point to the unpacked Rhino distribution directory. I keep these environment variables in
~/.profile.
Open the Bundle Editor in TextMate, navigate to
JavaScript
and add a new Command. From the
Save
drop-down, pick
Current File,
set
Input
to
Entire Document,
Output
to
Show as Tool Tip
and
Activation
to
Key Equivalent.
I chose
"cmd E"
as the hot-key for invoking the Command.
Here's the script for the Command(s) input:
echo Evaluating : "$TM_FILEPATH" echo echo $JAVA_HOME/bin/java -classpath $RHINO_HOME/js.jar \ org.mozilla.javascript.tools.shell.Main -f $1 "$TM_FILEPATH"
Sample output:
