Instructions

To use it, build the project:

mvn clean install

Select a project containing as fully qualified name dev.snowdrop.demo.FooBar

package dev.snowdrop.demo;

class FooBar {
}

and execute the command:

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run \
        -Drewrite.recipeArtifactCoordinates=dev.snowdrop:openrewrite-rules:1.0-SNAPSHOT \
        -Drewrite.activeRecipes=org.openrewrite.java.SayHelloToFooBarRecipe

When done, check if openrewrite added a Hello method

package dev.snowdrop.demo;
class FooBar {
    public String hello() {
        return "Hello from dev.snowdrop.demo.FooBar!";
    }
}

Issue

To debug: https://docs.openrewrite.org/reference/faq#my-recipe-runs-but-is-not-making-any-changes-whats-happening

mvnDebug -U org.openrewrite.maven:rewrite-maven-plugin:run \
  -Drewrite.recipeArtifactCoordinates=dev.snowdrop:openrewrite-rules:1.0-SNAPSHOT \
  -Drewrite.activeRecipes=org.openrewrite.FindParseFailures,org.openrewrite.java.search.FindMissingTypes,org.openrewrite.java.SayHelloToFooBarRecipe \
  -Drewrite.exportDatatables=true