default

A simple command line argument parser.

Usage:

1. Define parameters with param, requiredParam and repeatedParam. Each of these methods gives back a handle to a future argument value.

2. Call parseOrExit() with actual arguments.

3. If parsing succeeds, the arguments will be available in the handles defined in step 1.

If parsing fails, error descriptions are printed and the program exits with 2.

Example:

val parser = argparse.default.ArgumentParser()

val p1 = parser.param[String]("--this-is-a-named-param", default = "default value")
val p2 = parser.param[Int]("positional-param", default = 2)

parser.parseOrExit(Seq("--this-is-a-named-param=other", 5))
println(p1.value)
println(p2.value)

A typeclass that defines how to convert a string from a single command line argument to a given type.

The name of the flag to use for generating standalone bash-completion.

Set this to empty to disable bash-completion entirely.

Note that individual argument parsers may override this.

The name of the flag to use for printing help messages.

Set this to empty to disable help entirely.

Note that individual argument parsers may override this.

Generate a help message from parameters.

This message will be used by ArgumentParsers. Overriding this allows you to customize the help message of all ArgumentParsers.

Called by parseOrExit in case of error.

Overriding this can be useful in situations where you do not want to exit, for example in tests.

Top-level error handler for command line applications using the annotation API.

You can override this to change what should be done on errors.

The default implementation prints the exception's message unless the DEBUG environment variable is set, in which case the whole stack trace is printed. Then, it exits with error code 1.

Extension to reader

Convert a scala variable name to a setting name.