interakt

Interactive prompts made easy!

Install

Gradle - Kotlin DSL

repositories {
    mavenCentral()
}

dependencies {
    implementation("xyz.davidsimon:interakt:0.3.0")
}

Maven

<dependency>
    <groupId>xyz.davidsimon</groupId>
    <artifactId>interakt</artifactId>
    <version>0.3.0</version>
</dependency>

Usage

To construct and run an interactive prompt, you need to:

1. Obtain a Prompt instance
2. Add PromptFields to the prompt
3. Execute the prompt

Using a few convenience methods, we can achieve all this in just a few lines of code:

prompt {
    text("foo:", default = "default value")
    integer("bar:", default = 42)
    singleList("baz:", listOf("1", "2", "3"), true)
    list("multi:", listOf(
        ListField.Choice("one", 1),
        ListField.Choice("two", 2),
        ListField.Choice("three", 3)
    ))

    println("Result:")
    for((key, value) in execute()) {
        println("${key.promptMessage} $value")
    }
}

Fields

PromptField

Base class for all other fields

Options:

Parameter	Type	Description
promptMessage	String	Message to display before user input
shouldPrompt	(PromptResult, T?) -> Boolean	Controls whether the field should be prompted. Receives the answers entered so far and the current field's instance
default	(PromptResult, T?) -> T?	Provides a default value that will be pre-filled

StatefulField

Base class for fields that have a complex rendering function. Has event handlers that receive the current RenderState.

TextField

Prompts user for simple text input

PasswordField

Prompts the user for text input and masks it with * characters

IntegerField

Prompts user for integer input

ListField

Prompts the user to choose items from a list. The displayed name and the actual value of the items may differ.

Options:

Parameter	Type	Description
choices	(PromptResult) -> List<Choice<T>>	Returns the available choices

SingleValueListField

Prompts the user to choose ONE item from a list.

TextListField

Prompts the user to choose from a list of text items. Optionally the user may enter a custom value.

Options:

Parameter	Type	Description
choices	(tr: PromptResult) -> List<Choice<String>>	Returns the available choices
allowCustom	Boolean	Allow the user to enter a custom value. If true an additional choice will be added with an empty string value
customPromptMessage	String	Message to display when user enter custom value

Acknowledgement

interakt is built using JLine