Kotlin Environment setup for Command Line

Setting up a Kotlin development environment for the command line involves installing the Kotlin compiler and using it to compile and run Kotlin programs. Here's a step-by-step tutorial:

1. Prerequisites:

Java Development Kit (JDK) installed. Kotlin is JVM-based, so you need the JDK.

2. Installing Kotlin Compiler:

You can install the Kotlin compiler using various methods, but one of the easiest ways is via SDKMAN!:

Using SDKMAN! (Linux/macOS):

Install SDKMAN if you haven't:
```
curl -s "https://get.sdkman.io" | bash
```
Open a new terminal and install Kotlin:
```
sdk install kotlin
```

Using Homebrew (macOS):

brew install kotlin

Downloading Manually:

Alternatively, you can download the standalone compiler from Kotlin's GitHub Releases and add its location to your system PATH.

3. Writing a Simple Kotlin Program:

Using your favorite text editor, create a new file called HelloWorld.kt:

fun main() {
    println("Hello, Kotlin from Command Line!")
}

4. Compiling and Running:

Compiling:

From the terminal, navigate to the directory containing your Kotlin file and compile it using the Kotlin compiler:

kotlinc HelloWorld.kt -include-runtime -d HelloWorld.jar

This command will produce a runnable JAR file named HelloWorld.jar.

Running:

You can run the compiled JAR using the Java runtime:

java -jar HelloWorld.jar

You should see the output: Hello, Kotlin from Command Line!.

5. Using Kotlin Interactive Shell:

Kotlin also provides an interactive shell (REPL) which you can use for quick experiments:

kotlin

Now, you can write Kotlin expressions directly, and they'll be evaluated instantly.

Conclusion:

Setting up Kotlin for command line development is straightforward. While command line development is great for learning and small scripts, for larger projects, you might want to consider using an Integrated Development Environment (IDE) like IntelliJ IDEA, which offers a more feature-rich environment for Kotlin development.

Kotlin REPL (Read-Eval-Print Loop) in terminal: Start the Kotlin REPL to interactively evaluate Kotlin expressions.
```
$ kotlinc-jvm
```
Compiling and running Kotlin programs using command line: Compile and run Kotlin programs using the kotlinc and kotlin commands.
```
$ kotlinc-jvm -include-runtime -d program.jar program.kt
$ java -jar program.jar
```
Creating Kotlin projects without an IDE: Initialize a Kotlin project using a build tool like Gradle or Maven.
```
$ gradle init --type kotlin-application
```
Kotlin command line development workflow: Edit Kotlin source files using a text editor, compile using kotlinc, and run the resulting bytecode.
```
$ kotlinc-jvm source.kt -include-runtime -d program.jar
$ java -jar program.jar
```
Using Kotlin scripts in the command line: Write Kotlin scripts and execute them directly from the command line.
```
// hello.kts
println("Hello, Kotlin!")
```
```
$ kotlin hello.kts
```
Installing and managing Kotlin versions in terminal: Use SDKMAN! or other version managers to install and manage multiple Kotlin versions.
```
$ sdk install kotlin 1.5.21
```
Setting up classpath for Kotlin on the command line: Specify classpath when compiling Kotlin programs with dependencies.
```
$ kotlinc-jvm -cp path/to/library.jar -include-runtime -d program.jar program.kt
```
Working with Kotlin packages from the command line: Organize Kotlin source files into packages and compile them accordingly.
```
$ kotlinc-jvm -d out/ -cp src/ source/package/File.kt
```
Debugging Kotlin code in command line: Use debugging tools like JDWP for debugging Kotlin programs from the command line.
```
$ java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005 -jar program.jar
```
Integration of Kotlin with version control in terminal: Use version control systems like Git for managing Kotlin projects in the command line.
```
$ git init
$ git add .
$ git commit -m "Initial commit"
```
Continuous integration for Kotlin command line projects: Set up continuous integration pipelines using tools like Jenkins, Travis CI, or GitHub Actions for Kotlin projects.
```
# .travis.yml
language: kotlin
script: gradle build
```