Moderne licensed

Find Flow operator antipatterns

Recipe IDorg.openrewrite.kotlin.coroutines.FindFlowAntiPatterns$KtRecipeArtifactio.moderne.recipe:recipes-kotlin

Flow chains where operator order, sharing configuration, or terminal placement undermines the intended behavior — collapsible map.map / filter.filter, flowOn past a terminal, stateIn/shareIn without an explicit timeout, Flow.collect inside @Composable, etc.

Composite recipeProprietary

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.kotlin.coroutines.FindFlowAntiPatterns$KtRecipe")
}

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

dependencies {
    rewrite("io.moderne.recipe:recipes-kotlin:0.5.0")
}

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.kotlin.coroutines.FindFlowAntiPatterns$KtRecipe

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

mod config recipes jar install io.moderne.recipe:recipes-kotlin:RELEASE

Definition

This recipe runs the following recipes in order.

Find Flow.map { } .map { } chainsorg.openrewrite.kotlin.coroutines.FindFlowMapMapChain$KtRecipe
Find Flow.filter { } .filter { } chainsorg.openrewrite.kotlin.coroutines.FindFlowFilterFilterChain$KtRecipe
Find Flow.flowOn placed after a terminal operatororg.openrewrite.kotlin.coroutines.FindFlowOnAfterTerminal$KtRecipe
Find stateIn with SharingStarted.Eagerly or unparameterized startorg.openrewrite.kotlin.coroutines.FindStateInWithoutTimeout$KtRecipe
Find shareIn calls without a timeout-parameterized startorg.openrewrite.kotlin.coroutines.FindShareInWithoutTimeout$KtRecipe
Find Flow.collect calls inside a @Composableorg.openrewrite.kotlin.coroutines.FindFlowCollectInsideCompose$KtRecipe
Find debounce(...).distinctUntilChanged() patternsorg.openrewrite.kotlin.coroutines.FindDebounceBeforeDistinctUntilChanged$KtRecipe
Find flowOf(...) calls — verify sizeorg.openrewrite.kotlin.coroutines.FindFlowOfWithVararg$KtRecipe
Find callbackFlow { } blocks without an awaitClose { } terminatororg.openrewrite.kotlin.coroutines.FindCallbackFlowWithoutAwaitClose$KtRecipe

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