scopt.immutable.OptionParser is instantiated within your object,
set up by an (ordered) sequence of invocations of
the various builder methods such as
opt method or
arg method.
scopt.immutable.OptionParser is instantiated within your object,
set up by an (ordered) sequence of invocations of
the various builder methods such as
opt method or
arg method.
val parser = new scopt.OptionParser[Config]("scopt") {
head("scopt", "3.x")
opt[Int]('f', "foo").action( (x, c) =>
c.copy(foo = x) ).text("foo is an integer property")
opt[File]('o', "out").required().valueName("").
action( (x, c) => c.copy(out = x) ).
text("out is a required file property")
opt[(String, Int)]("max").action({
case ((k, v), c) => c.copy(libName = k, maxCount = v) }).
validate( x =>if (x._2 > 0) success
else failure("Value must be >0") ).
keyValueName("", "").
text("maximum count for ")
opt[Seq[File]]('j', "jars").valueName(",...").action( (x,c) =>
c.copy(jars = x) ).text("jars to include")
opt[Map[String,String]]("kwargs").valueName("k1=v1,k2=v2...").action( (x, c) =>
c.copy(kwargs = x) ).text("other arguments")
opt[Unit]("verbose").action( (_, c) =>
c.copy(verbose = true) ).text("verbose is a flag")
opt[Unit]("debug").hidden().action( (_, c) =>
c.copy(debug = true) ).text("this option is hidden in the usage text")
help("help").text("prints this usage text")
arg[File]("...").unbounded().optional().action( (x, c) =>
c.copy(files = c.files :+ x) ).text("optional unbounded args")
note("some notes.".newline)
cmd("update").action( (_, c) => c.copy(mode = "update") ).
text("update is a command.").
children(
opt[Unit]("not-keepalive").abbr("nk").action( (_, c) =>
c.copy(keepalive = false) ).text("disable keepalive"),
opt[Boolean]("xyz").action( (x, c) =>
c.copy(xyz = x) ).text("xyz is a boolean property"),
opt[Unit]("debug-update").hidden().action( (_, c) =>
c.copy(debug = true) ).text("this option is hidden in the usage text"),
checkConfig( c =>if (c.keepalive && c.xyz) failure("xyz cannot keep alive")
else success )
)
}
// parser.parse returns Option[C]
parser.parse(args, Config()) match {
caseSome(config) =>// do stuffcaseNone=>// arguments are bad, error message will have been displayed
}
scopt.immutable.OptionParser
is instantiated within your object, set up by an (ordered) sequence of invocations of the various builder methods such asopt
method orarg
method.