Can't exec mkdir -p target/directory in 3.1.0

[josephlbarnett]

consider the following pom:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.joe.test</groupId>
    <artifactId>exec</artifactId>

    <version>1.0-SNAPSHOT</version>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>3.1.0</version>
                <executions>
                    <execution>
                        <id>mkdirs</id>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                        <phase>compile</phase>
                        <configuration>
                            <executable>mkdir</executable>
                            <arguments>
                                    <argument>-p</argument>
                                    <argument>dist/emails</argument>
                            </arguments>
                            <skip>${skip.tests}</skip>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

This creates the dist/emails directory in 3.0.0, but fails in 3.1.0 with:

[DEBUG] Executing command line: [mkdir, -p]
mkdir: missing operand
Try 'mkdir --help' for more information.
[ERROR] Command execution failed.
org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1)

it works if using --parents instead of -p as an argument to mkdir -- I believe this is introduced by #172 but was intended to be introduced in #55?

[janhicken]

I'm also having a configuration with a -p argument and it broke with version 3.1.0. Using the long form of it works as a workaround.

[bmarwell]

Interesting. Will look into it.

[bmarwell]

Got it. The problem is:

https://github.com/mojohaus/exec-maven-plugin/blob/master/src/main/java/org/codehaus/mojo/exec/ExecMojo.java#L733-L736

Workaround for now is:

-Dexec.longModulepath=false or configuration <longModulepath>false</longModulepath>.

Or use <argument>--parents</argument>, but this will not work on AIX, BSD, MacOS etc.: https://www.freebsd.org/cgi/man.cgi?query=mkdir&sektion=1&format=html and https://ss64.com/osx/mkdir.html

[dwhitejazz]

Just ran into this issue and glad to find it reported here. Is there a scheduled update? For now the workaround is fine.