src/Pure/System/options.scala
author wenzelm
Wed Apr 13 17:00:02 2016 +0200 (2016-04-13)
changeset 62968 4e4738698db4
parent 62832 c1410bcf6e87
child 63441 4c3fa4dba79f
permissions -rw-r--r--
clarified syntax;
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/*  Title:      Pure/System/options.scala
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    Author:     Makarius
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System options with external string representation.
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*/
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package isabelle
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import java.util.Calendar
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object Options
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{
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  type Spec = (String, Option[String])
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  val empty: Options = new Options()
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  /* representation */
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  sealed abstract class Type
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  {
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    def print: String = Word.lowercase(toString)
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  }
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  case object Bool extends Type
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  case object Int extends Type
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  case object Real extends Type
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  case object String extends Type
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  case object Unknown extends Type
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  case class Opt(
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    public: Boolean,
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    pos: Position.T,
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    name: String,
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    typ: Type,
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    value: String,
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    default_value: String,
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    description: String,
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    section: String)
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  {
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    private def print(default: Boolean): String =
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    {
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      val x = if (default) default_value else value
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      "option " + name + " : " + typ.print + " = " +
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        (if (typ == Options.String) quote(x) else x) +
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        (if (description == "") "" else "\n  -- " + quote(description))
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    }
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    def print: String = print(false)
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    def print_default: String = print(true)
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    def title(strip: String = ""): String =
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    {
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      val words = Word.explode('_', name)
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      val words1 =
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        words match {
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          case word :: rest if word == strip => rest
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          case _ => words
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        }
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      Word.implode(words1.map(Word.perhaps_capitalize(_)))
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    }
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    def unknown: Boolean = typ == Unknown
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  }
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  /* parsing */
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  private val SECTION = "section"
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  private val PUBLIC = "public"
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  private val OPTION = "option"
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  private val OPTIONS = Path.explode("etc/options")
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  private val PREFS_DIR = Path.explode("$ISABELLE_HOME_USER/etc")
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  private val PREFS = PREFS_DIR + Path.basic("preferences")
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  lazy val options_syntax =
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    Outer_Syntax.init() + ":" + "=" + "--" + Symbol.comment + Symbol.comment_decoded +
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      (SECTION, Keyword.DOCUMENT_HEADING) + PUBLIC + (OPTION, Keyword.THY_DECL)
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  lazy val prefs_syntax = Outer_Syntax.init() + "="
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  trait Parser extends Parse.Parser
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  {
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    val option_name = atom("option name", _.is_name)
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    val option_type = atom("option type", _.is_name)
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    val option_value =
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      opt(token("-", tok => tok.is_sym_ident && tok.content == "-")) ~ atom("nat", _.is_nat) ^^
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        { case s ~ n => if (s.isDefined) "-" + n else n } |
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      atom("option value", tok => tok.is_name || tok.is_float)
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  }
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  object Parser extends Parse.Parser with Parser
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  {
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    def comment_marker: Parser[String] =
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      $$$("--") | $$$(Symbol.comment) | $$$(Symbol.comment_decoded)
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    val option_entry: Parser[Options => Options] =
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    {
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      command(SECTION) ~! text ^^
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        { case _ ~ a => (options: Options) => options.set_section(a) } |
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      opt($$$(PUBLIC)) ~ command(OPTION) ~! (position(option_name) ~ $$$(":") ~ option_type ~
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      $$$("=") ~ option_value ~ (comment_marker ~! text ^^ { case _ ~ x => x } | success(""))) ^^
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        { case a ~ _ ~ ((b, pos) ~ _ ~ c ~ _ ~ d ~ e) =>
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            (options: Options) => options.declare(a.isDefined, pos, b, c, d, e) }
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    }
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    val prefs_entry: Parser[Options => Options] =
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    {
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      option_name ~ ($$$("=") ~! option_value) ^^
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      { case a ~ (_ ~ b) => (options: Options) => options.add_permissive(a, b) }
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    }
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    def parse_file(syntax: Outer_Syntax, parser: Parser[Options => Options],
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      options: Options, file: Path): Options =
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    {
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      val toks = Token.explode(syntax.keywords, File.read(file))
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      val ops =
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        parse_all(rep(parser), Token.reader(toks, Token.Pos.file(file.implode))) match {
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          case Success(result, _) => result
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          case bad => error(bad.toString)
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        }
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      try { (options.set_section("") /: ops) { case (opts, op) => op(opts) } }
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      catch { case ERROR(msg) => error(msg + Position.here(file.position)) }
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    }
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  }
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  def init_defaults(): Options =
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  {
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    var options = empty
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    for {
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      dir <- Isabelle_System.components()
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      file = dir + OPTIONS if file.is_file
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    } { options = Parser.parse_file(options_syntax, Parser.option_entry, options, file) }
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    options
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  }
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  def init(): Options = init_defaults().load_prefs()
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  /* encode */
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  val encode: XML.Encode.T[Options] = (options => options.encode)
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  /* Isabelle tool wrapper */
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  val isabelle_tool = Isabelle_Tool("option", "print Isabelle system options", args =>
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  {
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    var build_options = false
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    var get_option = ""
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    var list_options = false
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    var export_file = ""
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    val getopts = Getopts("""
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Usage: isabelle options [OPTIONS] [MORE_OPTIONS ...]
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  Options are:
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    -b           include $ISABELLE_BUILD_OPTIONS
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    -g OPTION    get value of OPTION
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    -l           list options
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    -x FILE      export options to FILE in YXML format
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  Report Isabelle system options, augmented by MORE_OPTIONS given as
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  arguments NAME=VAL or NAME.
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""",
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      "b" -> (_ => build_options = true),
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      "g:" -> (arg => get_option = arg),
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      "l" -> (_ => list_options = true),
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      "x:" -> (arg => export_file = arg))
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    val more_options = getopts(args)
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    if (get_option == "" && !list_options && export_file == "") getopts.usage()
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    val options =
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    {
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      val options0 = Options.init()
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      val options1 =
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        if (build_options)
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          (options0 /: Word.explode(Isabelle_System.getenv("ISABELLE_BUILD_OPTIONS")))(_ + _)
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        else options0
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      (options1 /: more_options)(_ + _)
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    }
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    if (get_option != "")
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      Console.println(options.check_name(get_option).value)
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    if (export_file != "")
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      File.write(Path.explode(export_file), YXML.string_of_body(options.encode))
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    if (get_option == "" && export_file == "")
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      Console.println(options.print)
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  })
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}
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final class Options private(
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  val options: Map[String, Options.Opt] = Map.empty,
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  val section: String = "")
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{
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  override def toString: String = options.iterator.mkString("Options (", ",", ")")
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  private def print_opt(opt: Options.Opt): String =
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    if (opt.public) "public " + opt.print else opt.print
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  def print: String = cat_lines(options.toList.sortBy(_._1).map(p => print_opt(p._2)))
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  def description(name: String): String = check_name(name).description
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  /* check */
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  def check_name(name: String): Options.Opt =
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    options.get(name) match {
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      case Some(opt) if !opt.unknown => opt
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      case _ => error("Unknown option " + quote(name))
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    }
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  private def check_type(name: String, typ: Options.Type): Options.Opt =
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  {
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    val opt = check_name(name)
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    if (opt.typ == typ) opt
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    else error("Ill-typed option " + quote(name) + " : " + opt.typ.print + " vs. " + typ.print)
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  }
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  /* basic operations */
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  private def put[A](name: String, typ: Options.Type, value: String): Options =
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  {
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    val opt = check_type(name, typ)
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    new Options(options + (name -> opt.copy(value = value)), section)
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  }
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  private def get[A](name: String, typ: Options.Type, parse: String => Option[A]): A =
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  {
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    val opt = check_type(name, typ)
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    parse(opt.value) match {
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      case Some(x) => x
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      case None =>
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        error("Malformed value for option " + quote(name) +
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          " : " + typ.print + " =\n" + quote(opt.value))
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    }
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  }
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  /* internal lookup and update */
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  class Bool_Access
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  {
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    def apply(name: String): Boolean = get(name, Options.Bool, Properties.Value.Boolean.unapply)
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    def update(name: String, x: Boolean): Options =
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      put(name, Options.Bool, Properties.Value.Boolean(x))
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  }
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  val bool = new Bool_Access
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  class Int_Access
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  {
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    def apply(name: String): Int = get(name, Options.Int, Properties.Value.Int.unapply)
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    def update(name: String, x: Int): Options =
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      put(name, Options.Int, Properties.Value.Int(x))
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  }
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  val int = new Int_Access
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  class Real_Access
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  {
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    def apply(name: String): Double = get(name, Options.Real, Properties.Value.Double.unapply)
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    def update(name: String, x: Double): Options =
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      put(name, Options.Real, Properties.Value.Double(x))
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  }
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  val real = new Real_Access
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  class String_Access
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  {
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    def apply(name: String): String = get(name, Options.String, s => Some(s))
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    def update(name: String, x: String): Options = put(name, Options.String, x)
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  }
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  val string = new String_Access
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  class Seconds_Access
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  {
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    def apply(name: String): Time = Time.seconds(real(name))
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  }
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  val seconds = new Seconds_Access
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  /* external updates */
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  private def check_value(name: String): Options =
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  {
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    val opt = check_name(name)
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    opt.typ match {
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      case Options.Bool => bool(name); this
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      case Options.Int => int(name); this
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      case Options.Real => real(name); this
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      case Options.String => string(name); this
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      case Options.Unknown => this
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    }
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  }
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  def declare(
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    public: Boolean,
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    pos: Position.T,
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    name: String,
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    typ_name: String,
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    value: String,
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    description: String): Options =
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  {
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    options.get(name) match {
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      case Some(other) =>
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        error("Duplicate declaration of option " + quote(name) + Position.here(pos) +
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          Position.here(other.pos))
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      case None =>
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        val typ =
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          typ_name match {
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            case "bool" => Options.Bool
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            case "int" => Options.Int
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            case "real" => Options.Real
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            case "string" => Options.String
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            case _ =>
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              error("Unknown type for option " + quote(name) + " : " + quote(typ_name) +
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                Position.here(pos))
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          }
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        val opt = Options.Opt(public, pos, name, typ, value, value, description, section)
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        (new Options(options + (name -> opt), section)).check_value(name)
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    }
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  }
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  def add_permissive(name: String, value: String): Options =
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  {
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    if (options.isDefinedAt(name)) this + (name, value)
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    else {
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      val opt = Options.Opt(false, Position.none, name, Options.Unknown, value, value, "", "")
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      new Options(options + (name -> opt), section)
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    }
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  }
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  def + (name: String, value: String): Options =
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  {
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    val opt = check_name(name)
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    (new Options(options + (name -> opt.copy(value = value)), section)).check_value(name)
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  }
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  def + (name: String, opt_value: Option[String]): Options =
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  {
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    val opt = check_name(name)
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    opt_value match {
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      case Some(value) => this + (name, value)
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      case None if opt.typ == Options.Bool => this + (name, "true")
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      case None => error("Missing value for option " + quote(name) + " : " + opt.typ.print)
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    }
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  }
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  def + (str: String): Options =
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  {
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    str.indexOf('=') match {
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      case -1 => this + (str, None)
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      case i => this + (str.substring(0, i), str.substring(i + 1))
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    }
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  }
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  def ++ (specs: List[Options.Spec]): Options =
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    (this /: specs)({ case (x, (y, z)) => x + (y, z) })
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  /* sections */
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  def set_section(new_section: String): Options =
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    new Options(options, new_section)
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  def sections: List[(String, List[Options.Opt])] =
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    options.groupBy(_._2.section).toList.map({ case (a, opts) => (a, opts.toList.map(_._2)) })
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   373
wenzelm@49270
   374
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  /* encode */
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wenzelm@48456
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  def encode: XML.Body =
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  {
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    val opts =
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      for ((_, opt) <- options.toList; if !opt.unknown)
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        yield (opt.pos, (opt.name, (opt.typ.print, opt.value)))
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   382
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    import XML.Encode.{string => string_, _}
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    list(pair(properties, pair(string_, pair(string_, string_))))(opts)
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  }
wenzelm@48807
   386
wenzelm@48807
   387
wenzelm@48807
   388
  /* user preferences */
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wenzelm@48807
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  def load_prefs(): Options =
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    if (Options.PREFS.is_file)
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      Options.Parser.parse_file(
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        Options.prefs_syntax, Options.Parser.prefs_entry, this, Options.PREFS)
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    else this
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wenzelm@48807
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  def save_prefs()
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  {
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    val defaults = Options.init_defaults()
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    val changed =
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      (for {
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        (name, opt2) <- options.iterator
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        opt1 = defaults.options.get(name)
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        if opt1.isEmpty || opt1.get.value != opt2.value
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      } yield (name, opt2.value, if (opt1.isEmpty) "  (* unknown *)" else "")).toList
wenzelm@48860
   405
wenzelm@48807
   406
    val prefs =
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      changed.sortBy(_._1)
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   408
        .map({ case (x, y, z) => x + " = " + Outer_Syntax.quote_string(y) + z + "\n" }).mkString
wenzelm@48807
   409
wenzelm@50893
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    Isabelle_System.mkdirs(Options.PREFS_DIR)
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    File.write_backup(Options.PREFS,
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      "(* generated by Isabelle " + Calendar.getInstance.getTime + " *)\n\n" + prefs)
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   413
  }
wenzelm@48365
   414
}
wenzelm@49245
   415
wenzelm@49245
   416
wenzelm@49245
   417
class Options_Variable
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{
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  private var options: Option[Options] = None
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   420
wenzelm@62227
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  def store(new_options: Options): Unit = synchronized { options = Some(new_options) }
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   422
wenzelm@62227
   423
  def value: Options = synchronized {
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   424
    options match {
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   425
      case Some(opts) => opts
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   426
      case None => error("Uninitialized Isabelle system options")
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   427
    }
wenzelm@62227
   428
  }
wenzelm@49245
   429
wenzelm@62227
   430
  private def upd(f: Options => Options): Unit = synchronized { options = Some(f(value)) }
wenzelm@62227
   431
wenzelm@62227
   432
  def + (name: String, x: String): Unit = upd(opts => opts + (name, x))
wenzelm@49245
   433
wenzelm@49954
   434
  class Bool_Access
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  {
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    def apply(name: String): Boolean = value.bool(name)
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   437
    def update(name: String, x: Boolean): Unit = upd(opts => opts.bool.update(name, x))
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   438
  }
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   439
  val bool = new Bool_Access
wenzelm@49245
   440
wenzelm@49954
   441
  class Int_Access
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   442
  {
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   443
    def apply(name: String): Int = value.int(name)
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   444
    def update(name: String, x: Int): Unit = upd(opts => opts.int.update(name, x))
wenzelm@49245
   445
  }
wenzelm@49954
   446
  val int = new Int_Access
wenzelm@49245
   447
wenzelm@49954
   448
  class Real_Access
wenzelm@49245
   449
  {
wenzelm@62227
   450
    def apply(name: String): Double = value.real(name)
wenzelm@62227
   451
    def update(name: String, x: Double): Unit = upd(opts => opts.real.update(name, x))
wenzelm@49245
   452
  }
wenzelm@49954
   453
  val real = new Real_Access
wenzelm@49245
   454
wenzelm@49954
   455
  class String_Access
wenzelm@49245
   456
  {
wenzelm@62227
   457
    def apply(name: String): String = value.string(name)
wenzelm@62227
   458
    def update(name: String, x: String): Unit = upd(opts => opts.string.update(name, x))
wenzelm@49245
   459
  }
wenzelm@49954
   460
  val string = new String_Access
wenzelm@50207
   461
wenzelm@50207
   462
  class Seconds_Access
wenzelm@50207
   463
  {
wenzelm@62227
   464
    def apply(name: String): Time = value.seconds(name)
wenzelm@50207
   465
  }
wenzelm@50207
   466
  val seconds = new Seconds_Access
wenzelm@49245
   467
}