Executing Groovy script from Maven

Question

When executing Groovy script from Maven I get the following error:

[ERROR] Failed to execute goal org.codehaus.groovy.maven:gmaven-plugin:1.0:execute (default) on project /path/to/project: org.codehaus.groovy.runtime.metaclass.MissingPropertyExceptionNoStack: No such property: project for class: /path/to/groovy/script/Example -> [Help 1]

I searched for possible cause and solution, but still don't understand what am I doing wrong and how to fix it. My script works fine when I execute it standalone or via ANT script.

Here is the script:

class Example {
   public static void main(String[] args){
       new Example().show();
   }

   def show() {
       println 'Hello World'
  }
}

And this is how I am calling it:

<dependencies>
    <dependency>
        <groupId>org.codehaus.gmaven.runtime</groupId>
        <artifactId>gmaven-runtime-1.7</artifactId>
        <version>1.3</version>
        <exclusions>
             <exclusion>
                 <groupId>org.codehaus.groovy</groupId>
                 <artifactId>groovy-all</artifactId>
             </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy-all</artifactId>
        <version>1.7.6</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.groovy.maven</groupId>
            <artifactId>gmaven-plugin</artifactId>
            <executions>
                <execution>
                    <phase>generate-resources</phase>
                    <goals>
                        <goal>execute</goal>
                    </goals>
                    <configuration>
                        <source>${pom.basedir}/path/to/script/Test.groovy</source>
                    </configuration>
                </execution>
            </executions>
        </plugin>

Try updating to version 1.5 of the `gmaven-plugin`, does that help? The error message shows version 1.0.. — user944849, Aug 15 '13 at 16:27
Tried it, same thing. This is what I have in POM now: http://pastebin.com/jG3Xrhgi. — positron, Aug 15 '13 at 17:07
Tried, no change. Even referenced script by its absolute path. — positron, Aug 15 '13 at 17:36
Can you just try with only `println 'Hello World'` in a script named `Example.groovy` (remove all the class and psvm stuff)? — dmahapatro, Aug 15 '13 at 17:55
@dmahapatro This works, but when I change back to original version, same error is thrown. — positron, Aug 15 '13 at 18:17

score 5 · Accepted Answer · answered Aug 15 '13 at 18:24

5

Add your scripts directly to Example.groovy file, as long as you are able to access the default variables, instead of making it a POGO.

The script eventually compile down to a groovy class by itself with the same name as the file name (in this case Example). I am skeptical about the whole idea of class and psvm. :-)

//Example.groovy
println 'hello world'

println "$project"
println "$session"
println "$settings"

answered Aug 15 '13 at 18:24

dmahapatro

49,365
7
88
117

dmahapatro is right. `project` is available to a script via `Binding`. It can't be accessed from class – Ori Dar Aug 15 '13 at 18:45
Thanks. I changed my class to a script. My original class used groovy.io.FileType for example, so I had to add dependency on groovy-all, making my POM as http://pastebin.mozilla.org/2863147, otherwise I would get error about failure to located g.i.FileType. Now when I execute Maven I get another error - http://pastebin.mozilla.org/2863150. – positron Aug 15 '13 at 18:49
@AlexKravets Well that looks like a different issue altogether related to maven. You can find some valuable inputs from [this](http://stackoverflow.com/questions/14736283/maven-build-error-failed-to-execute-goal-missing-a-class) and [that](http://stackoverflow.com/questions/6044026/maven-archetype-problem) question. – dmahapatro Aug 15 '13 at 22:12
@dmahapatro Thanks for the links. Last question, when I run groovy class via call from ANT script everything works fine. So what is the difference between calling script through ANT and Maven? – positron Aug 16 '13 at 15:12

score 2 · Answer 2 · answered Apr 29 '14 at 02:33

2

For whatever reason the gmaven-plugin does not appear to like a main

if you code it like

class Example {
   def show() {
       println 'Hello World'
   }
}
new Example().show();

it will work.

answered Apr 29 '14 at 02:33

user2480415

77
2

Executing Groovy script from Maven

2 Answers2

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