Maven exec plugin - Executing a python script

Question

I am using maven on Win 7 to build an application. I use the exec plugin to invoke a python script.

<plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <version>1.2.1</version>
        <executions>
            <execution>
                <id>create-dir</id>
                <phase>process-classes</phase>
                <goals>
                    <goal>exec</goal>
                </goals>
            </execution>
        </executions>
        <configuration>
            <executable>src/main/upgrade/create.py</executable>
            <arguments>
                <argument>ChangeSet.txt</argument>
            </arguments>
        </configuration>
    </plugin>

I get the below error when I build the project.

Embedded error: Cannot run program "pathToScript/create.py" CreateProcess error=193, %1 is not a valid Win32 application

I do have python installed and added to the %PATH variable.

How do I fix it such that it will work independent of OS platform ?

.:-EDIT-:.

WORKING CODE SNIPPET

<plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <executions>
            <execution>
                <configuration>
                    <executable>python</executable>
                    <workingDirectory>src/main/upgrade/</workingDirectory>
                    <arguments>
                        <argument>createChangeSet.py</argument>
                    </arguments>    

                </configuration>
                <id>python-build</id>
                <phase>prepare-package</phase>
                <goals>
                    <goal>exec</goal>
                </goals>
            </execution>
        </executions>
    </plugin>

The question is why do you need to run a python script? You need to define the the python intepreter on Windows on Linux the shebang-line is important. — khmarbaise, Dec 20 '12 at 15:01
I use your approach to run a time-consuming python script at maven install phase, the python script works but with chaos console log, the output comes from python is in some random wrong order. Do you have the same problem? — yorkw, Apr 17 '14 at 08:31

Ryan Stewart · Accepted Answer · 2012-12-24T17:41:58.103

18

In Windows, the script isn't executable. The executable is the python interpreter, and the script is an argument to it, so put <executable>path to your python interpreter</executable> and add the script as an <argument>. I expect the same should work for any platform, but I'm no Python expert.

edited Dec 24 '12 at 17:41

answered Dec 24 '12 at 17:36

Ryan Stewart

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1

Thanks Ryan. That worked. Adding the working script to the original post for anybody else who may need it. – SpikETidE Dec 25 '12 at 17:40

score 1 · Answer 2 · answered Apr 20 '17 at 19:32

Just wanted to add that with the newer version of exec-maven-plugin, the configuration tag must be placed after the executions tag to work.

As in the working snippet above:

<plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <executions>
            <execution>
                <id>python-build</id>
                <phase>prepare-package</phase>
                <goals>
                    <goal>exec</goal>
                </goals>
            </execution>
        </executions>
        <configuration>
           <executable>python</executable>
           <workingDirectory>src/main/upgrade/</workingDirectory>
           <arguments>
                <argument>createChangeSet.py</argument>
           </arguments>    
        </configuration>
    </plugin>

Maven exec plugin - Executing a python script

WORKING CODE SNIPPET

2 Answers2

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