Kotlin script and kscript

_KotlinScript.md

Collection of kotlin script and kscript examples

arguments.kts

println("Called with args:")
args.forEach {
    println("- $it")
}

// ----------------------------------------------------
// $ kotlinc -script helloScript.kts hello ‘with spaces’
//
// Called with args:
// - hello
// - with spaces

coroutines.kts

#!/usr/bin/env kscript

@file:MavenRepository("central", "https://repo.maven.apache.org/maven2/")
@file:DependsOn("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.2")
@file:DependsOn("org.jetbrains.kotlinx:kotlinx-coroutines-core-common:1.3.2")

import kotlinx.coroutines.*

println("Start")

// Start a coroutine
GlobalScope.launch {
    delay(1000)
    println("Stop")
}

println("Hello")
Thread.sleep(2000)

dependencies.kts

//DEPS com.drewnoakes:metadata-extractor:2.12.0

import com.drew.imaging.ImageMetadataReader
import com.drew.metadata.Metadata
import java.io.File

val metadata: Metadata = ImageMetadataReader.readMetadata(File("image.jpg"))

dirsExplorer.kts

import java.io.File

val folders: Array<File>? = File(".").listFiles { file -> file.isDirectory }
folders?.forEach {
    folder -> println(folder.absolutePath)
}

// ----------------------------------------------------
// $ kotlinc -script dirsExplore.kts
//
// ./dir2
// ./dir1

dirsExplorerRecursion.kts

import java.io.File

fun printCurrentAndSubdirs(currentDir: File) {
    println(currentDir.path)
    currentDir.listFiles { file -> file.isDirectory }?.forEach {
        printCurrentAndSubdirs(it)
    }
}

printCurrentAndSubdirs(File("."))

// ----------------------------------------------------

dirsExplorerRecursionExtensionFunction.kts

import java.io.File

fun File.printPathAndSubdirs() {
    println(path)
    listFiles { file -> file.isDirectory }?.forEach {
        it.printPathAndSubdirs()
    }
}

File(".").printPathAndSubdirs()

// ----------------------------------------------------
// $ kotlinc -script dirsExploreRecursionExtension.kts
//
// .
// ./dir2
// ./dir2/dir2.1
// ./dir2/dir2.2
// ./dir1

include.kts

//INCLUDE utils.kt

@file:Include("util.kt")

val shouted = "hello!".upperCase()

interpreter.kts

#!/usr/bin/env kscript

println("Hello from Kotlin!")
for (arg in args) {
    println("arg: $arg")
}

// ----------------------------------------------------
// $ chmod +x interpreter.kts
// $ ./interpreter.kts world
//
// Hello!
// arg: world

kscriptUrl.kts

println("Hello from kscript")
println("The arguments were:")
args.forEach {
    println("- $it")
}