Moderne licensed

Remove unused local variables

Recipe IDorg.openrewrite.staticanalysis.RemoveUnusedLocalVariablesArtifactorg.openrewrite.recipe:rewrite-static-analysis

If a local variable is declared but not used, it is dead code and should be removed. Unused variables increase cognitive load for readers who must determine whether the variable matters, and they may signal incomplete implementations or missed refactoring.

Single recipeRSPEC-S1481MSAL

Add to your build

Get a download tokenThis recipe is Moderne licensed, so the token must belong to a Moderne customer. It replaces YOUR_DOWNLOAD_TOKEN below.

~/.gradle/gradle.properties

codeGenomeUsername=you@example.com
codeGenomeToken=YOUR_DOWNLOAD_TOKEN

build.gradle.kts

plugins {
    id("org.openrewrite.rewrite") version("latest.release")
}

rewrite {
    activeRecipe("org.openrewrite.staticanalysis.RemoveUnusedLocalVariables")
}

repositories {
    mavenCentral()
    maven {
        url = uri("https://artifacts.codegenomeproject.org/maven")
        credentials {
            username = providers.gradleProperty("codeGenomeUsername").get()
            password = providers.gradleProperty("codeGenomeToken").get()
        }
    }
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-static-analysis:2.44.0")
}

Then run

./gradlew rewriteRun

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.staticanalysis.RemoveUnusedLocalVariables

If the recipe isn’t available locally, install it with:

mod config recipes jar install org.openrewrite.recipe:rewrite-static-analysis:RELEASE

Options

Name	Type	Description
`ignoreVariablesNamed`	`String[]`	An array of variable identifier names for local variables to ignore, even if the local variable is unused. e.g. `[unused, notUsed, IGNORE_ME]`
`withType`	`String`	A fully qualified class name. Only unused local variables whose type matches this will be removed. If empty or not set, all unused local variables are considered for removal. e.g. `java.lang.String`
`withSideEffects`	`Boolean`	Whether to remove unused local variables despite side effects in the initializer. Default false.

Data tables

Structured output this recipe can produce.

Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats