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GroovyUsing Groovy
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Groovy scripts are a number of statements and class declarations in a text file. Groovy scripts can be used similarly to other scripting languages. There are various ways of running Groovy scripts Using the interactive consoleGroovy has a Swing interactive console that allows you to type in commmands and execute them rather like using an SQL query tool. History is available and such like so you can move forwards and backwards through commands etc. If you install a binary distribution of Groovy then you can run the Groovy Swing console by typing this on the command line. groovyConsole For a command line interactive shell type
groovysh To run the Swing Groovy console from a source distribution type…
maven console To see how to add things to the classpath see below Running Groovy scripts from your IDEThere is a helper class called GroovyShell which has a main(String[]) method for running any Groovy script. You can run any groovy script as follows
java groovy.lang.GroovyShell foo/MyScript.groovy [arguments] You can then run the above Groovy main() in your IDE to run or debug any Groovy script. Running Groovy scripts from the command lineThere are shell scripts called 'groovy' or 'groovy.bat' depending on your platform which is part of the Groovy runtime.
groovy foo/MyScript.groovy [arguments] If you are using Groovy built from CVS Head (after Beta-5, see below if you want to upgrade), apart from Groovy scripts, you may also now run different kind of classes from the command-line.
To work from the latest and greatest Groovy, do a cvs checkout and then type
maven groovy:make-install You'll then have a full binary distribution made for you in groovy/target/install. You can then add groovy/target/install/bin to your path and you can then run groovy scripts easily from the command line. To see how to add things to the classpath see below Creating Unix scripts with GroovyYou can write unix scripts with Groovy and execute them directly on the command line as if they were normal unix shell scripts. Providing you have installed the Groovy binary distribution (see above) and 'groovy' is on your PATH then the following should work. There now follows a sample script which is in CVS. Save it as helloWorld.
#!/usr/bin/env groovy println("Hello world") for (a in this.args) { println("Argument: " + a) } Then to run the script from the command line, just make sure the script is executable then you can call it
chmod +x helloWorld ./helloWorld Adding things to the classpathWhen running command line scripts or interactive shells you might want to add things to your classpath such as JDBC drivers or JMS implementations etc. Do do this you have a few choices
Readline support in groovysh
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