Maven Enforcer: How to access maven properties from beanshell rule - maven

Question

I successfully created a evaluateBeanshell rule with the maven-enforcer-plugin that scans files in the workspace for common mistakes.
With a hardcoded path the rule works fine. When I want to use the ${project.basedir} variable from the surrounding pom, the script breaks on my Windows machine.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>${maven-enforcer-plugin.version}</version>
<executions>
<execution>
<id>enforce-banned-dependencies</id>
<inherited>true</inherited>
<goals>
<goal>enforce</goal>
</goals>
<configuration>
<rules>
<evaluateBeanshell>
<condition>
import scanner.MyScanner;
scanner = new MyScanner();
//hack to read root dir
//project.basedir crashes beanshell with its backslashes
rootPath = new File("");
root = new File(rootPath.getAbsolutePath());
print("Scanning in: " + root);
print("${project.artifactId}"); // works fine
print("${project.basedir}"); // breaks the code
scanner.loopThroughProjects(root);
return everythingIsFine;
</condition>
</evaluateBeanshell>
</rules>
<fail>true</fail>
</configuration>
</execution>
</executions>
In the debug output the line:
print("${project.basedir}");
was replaced by:
print("D:\code\my-maven-project");
Is there another maven property with sanitized slashes or is there another way to access ${project.basedir}?
The hack outlined in the code example kind of works, but I don't like hacks that force me to leave comments.

Answer 1

You could try ${project.baseUri}.
See https://maven.apache.org/ref/3.8.5/maven-model-builder/#Model_Interpolation
On my Windows 10 machine with Java 8 and Maven 3 the following test properties in pom.xml:
<test>${project.baseUri}</test>
<test2>${project.basedir}</test2>
become the following in the 'effective-pom' (via Intellij IDEA maven plugin)
<test>file:/D:/test/path/</test>
<test2>D:\test\path</test2>
This is just as a proof of concept to show the path separators change, and become valid as a Java String.
You could then transform the URI to a file for your needs in the beanshell script as follows:
uri = java.net.URI.create("${project.baseUri}");
root = new java.io.File(uri);
Via https://docs.oracle.com/javase/8/docs/api/java/io/File.html#File-java.net.URI-