Cli

Provides factory methods and other utilities.

import little.cli.{ *, given }
import Cli.{ application, option }

// Create application with supplied usage and options
val app = application("grep [ options ... ] <pattern> [ <fileName> ... ]",
 option("i", "ignore-case", false, "Perform case insensitive matching"),
 option("l", "files-with-matches", false, "Print file name only"),
 option("m", "max-count", true, "Stop reading file after 'num' matches").argName("num"),
 option("n", "line-number", false, "Include line number of match"),
 option("r", "recursive", false, "Recursively search subdirectories"),
 option("x", "exclude", true, "Exclude filename pattern from search").argName("pattern")
)

val args = Array("-ilr", "--exclude", "*.swp", "exception", "src/main/scala")

// Parse arguments
val cmd = app.parse(args)

cmd.hasOption("help") match
 case true  =>
   // Print help to System.out
   app.printHelp()
 case false =>
   // Get command arguments and pretend to do something
   val pattern  = cmd.getArg(0)
   val fileName = cmd.getArg(1)
   println(s"Searching for files with '$pattern' in $fileName directory...")