hi, I'm currently porting a lot of js to Kotlin an...

# javascript

[Bernhard]

hi, I'm currently porting a lot of js to Kotlin and still need to do releases with a combined typescript codebase; what is the recommended way to ship a compiled bundle with an existing kotlinjs codebase? I've tried simply shipping it in resources like this:

tasks.register<Exec>("installOldJs") {
    inputs.files(layout.projectDirectory.file("./oldsrc/package.json"))
    outputs.dir(layout.projectDirectory.dir("./oldsrc/node_modules"))
    workingDir = layout.projectDirectory.dir("oldsrc/").asFile
    commandLine = listOf("yarn", "install")
}
tasks.register<Exec>("compileOldJs") {
    mustRunAfter("installOldJs")
    inputs.dir(layout.projectDirectory.dir("./oldsrc/src/"))
    outputs.dir(layout.projectDirectory.dir("./oldsrc/dist/"))
    workingDir = layout.projectDirectory.dir("oldsrc/").asFile
    commandLine = listOf("yarn", "run", "build")
}
// inside kotlin block
        val jsMain by getting {
            resources.srcDirs(tasks.named("compileOldJs"))
            dependencies {
                implementation(project.dependencies.enforcedPlatform(libs.kotlin.wrappers))
                implementation(libs.kotlin.wrappers.js)
                implementation(libs.kotlin.plain.objects)
                implementation(libs.kotlinx.html)
                implementation(libs.kotlinx.coroutines.js)
                implementation(libs.jsonschemavalidator.js)
                api(libs.jquery)
            }
        }

but it seems that jsProductionExecutableCompileSync is tripping over the generated sourcemap:

Task :jsProductionExecutableCompileSync
Cannot rewrite paths in JavaScript source maps: Unsupported format. Contents should starts with `{"version":3,"file":"...","sources":[...],"sourcesContent":...`. Unknown key "mappings" at line 1 column 44 path $.mappings in `{"version":3,

[Artem Kobzar]

@Ilya Goncharov [JB] ^^

[Bernhard]

maybe looks like an issue where the source map is not correctly resolved by the main bundle file name?

[Ilya Goncharov [JB]]

Hi, we indeed have source map rewriter, we need it because in our Kotlin source maps we need to change relative paths because we change location of file.
I think we can consider such case as a bug, because js.map file in resources should be okay.
But for now, I think you can use one of following ways:
1. Use your NPM package as a file dependency of Kotlin project. You can just use implementation(npm(file(…))
2. Use output of your compileOldJs task as input to tasks jsProductionExecutableCompileSync and jsDevelopmentExecutableCompileSync , they have type IncrementalSyncTask, and you can touch task.from.from(tasks.named("compileOldJs"))

[Bernhard]

thank you ilya