Add check to make sure rewriteImplementation has not already been exended

[blipper]

What's changed?

This allows run parsing to run multiple times

What's your motivation?

Anything in particular you'd like reviewers to focus on?

Anyone you would like to review specifically?

Have you considered any alternatives or workarounds?

Any additional context

Checklist

• [ ] I've added unit tests to cover both positive and negative cases
• [ ] I've read and applied the recipe conventions and best practices
• [ ] I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

Thanks for the immediate suggested fix, and showing how you'd use this in

• 283

Noticed that we currently see a compilation failure after adding this method:

> Task :plugin:compileJava FAILED
Compiling with JDK Java compiler API.
/home/runner/work/rewrite-gradle-plugin/rewrite-gradle-plugin/plugin/src/main/java/org/openrewrite/gradle/isolated/DefaultProjectParser.java:1078: error: cannot find symbol
                if (!rewriteImplementation.extendsFrom.contains(implementation)) {
                                          ^
  symbol:   variable extendsFrom
  location: variable rewriteImplementation of type Configuration

So I've pushed up a small change to conform to use getExtendsFrom(); hope you agree.

[blipper]

Sorry. I wrote the fix in groovy and cut and paste into java.

[timtebeek]

No worries; I figured as much from looking at the syntax. The last remaining test failure is a known one still to be fixed

• https://github.com/openrewrite/rewrite-gradle-plugin/issues/279

Thanks for this fix!