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Scallop is a simple (yet powerful) command-line arguments parsing library for Scala.

The library is cross-built for all scala 2.9.x and 2.10 versions.

Scallop supports:

• flag, single-value and multiple value options
• POSIX-style short option names (-a) with grouping (-abc)
• GNU-style long option names (--opt)
• Property arguments (-Dkey=value, -D key1=value key2=value)
• Non-string types of options and properties values (with extendable converters)
• Mutually exclusive and codependent option relationships
• Powerful matching on trailing args
• Subcommands

Contents

• Basic usage
• Option types and definitions
• Help information printing
• Using ScallopOption
• Arguments validation
• Exception handling
• Subcommands
• Custom converters
• Using the builder
• Notes

Misc

For more examles, you can look at Scallop's test suite or consult the API docs.

Also, I wrote a blog post and another one about Scallop.