Re: Running a Groovy script with a compiled Java class

Another neat way to do this is to embed your groovy script inside a bash
script as per the method described in the following post:

https://mail-archives.apache.org/mod_mbox/groovy-users/201506.mbox/%[email protected]%3E

Maarten

On November 22, 2021 16:56:55 Blake McBride <[email protected]> wrote:
> Greetings,
>
> For my case, I think I have found a perfect solution.  I created the
> following bash script named run:
>
> -------------------------------
>
> #!/bin/bash
>
> # This script allows the running of a Groovy file in the context of the
> # entire system.
>
> JAR_PATH=`dirname $0`/../lib
> CLASSES_PATH=`dirname $0`/../build/web/WEB-INF/classes
>
> THE_CLASSPATH=.
> for i in `ls $JAR_PATH/*.jar`
> do
> THE_CLASSPATH=${THE_CLASSPATH}:${i}
> done
>
> THE_CLASSPATH=${THE_CLASSPATH}:${CLASSES_PATH}
>
> java -cp ${THE_CLASSPATH} groovy.ui.GroovyMain "$@"
>
>
> ------------------------------------
>
> I am then able to run a groovy file in the context of the rest of my system
> (this system has 9500 classes and 89 jar files).  I can now simply do:
>
> run MyGroovyFile
>
> Thanks!
>
> Blake
>
>
>
> On Mon, Nov 22, 2021 at 6:09 AM Blake McBride <[email protected]> wrote:
> Hi Paul,
>
> That worked great.  Thank you!
>
> However, it would be very convenient if I could specify the -cp using the
> "java -jar" method like so:
>
> java -jar groovy-3.0.9-indy.jar -cp . TestGroovy
>
> The reason is that the example I gave you is a simplified example of what I
> am actually doing.  Although the method you gave me does work in my
> situation too, it is situationally somewhat awkward.  It would be very
> convenient if the groovy jar accepted and used the -cp command.  Is there
> any way I can do that?
>
> (Just FYI, I am working on https://github.com/blakemcbride/Kiss   In
> particular, see section 7 of
> https://htmlpreview.github.io/?https://github.com/blakemcbride/Kiss/blob/master/manual/man/index.html
>  )
>
> Thanks!
>
> Blake
>
>
>
>
> On Mon, Nov 22, 2021 at 1:19 AM Paul King <[email protected]> wrote:
> Hi Blake,
>
> If you add the following line into your TestGroovy script:
> println System.getProperty('java.class.path')
> you will see that "." from the -cp commandline switch to java isn't
> passed through to Groovy when using java -jar.
>
> You can instead use (semicolon would be the path separator on Windows):
> java -cp /path/to/groovy/jar:. groovy.ui.GroovyMain TestGroovy
>
> or:
> /path/to/groovy TestGroovy
>
>
>
> Cheers, Paul.
>
> On Mon, Nov 22, 2021 at 1:49 PM Blake McBride <[email protected]> wrote:
>>
>> Greetings,
>>
>> I can run a simple Groovy class (TestGroovy.groovy) without explicitly
>> compiling it as follows:
>>
>> java -jar groovy-3.0.9-indy.jar TestGroovy
>>
>> I have a compiled Java class file named TestJava.class
>>
>> I am not using any package declarations.  everything is in the current
>> directory.
>>
>> I changed TestGroovy.groovy to call my TestJava.class file, however, this
>> is what I am getting:
>>
>> $ java -jar groovy-3.0.9-indy.jar TestGroovy
>> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
>> /home/blake/groovy/TestGroovy.groovy: 7: Apparent variable 'TestJava' was
>> found in a static scope but doesn't refer to a local variable, static field
>> or class. Possible causes:
>> You attempted to reference a variable in the binding or an instance
>> variable from a static context.
>> You misspelled a classname or statically imported field. Please check the
>> spelling.
>> You attempted to use a method 'TestJava' but left out brackets in a place
>> not allowed by the grammar.
>>  @ line 7, column 3.
>>     TestJava.javaMethod()
>>      ^
>>
>> 1 error
>>
>> I also tried:   java -cp . -jar groovy-3.0.9-indy.jar -cp .  TestGroovy
>> With the same error.
>>
>> Basically, I am trying to run a Groovy file and have it call a Java class
>> that I am supplying.
>>
>> I am attaching the Java and Groovy files.  Sure appreciate any help.
>>
>> Blake McBride
>>