src/Pure/System/build.scala
author wenzelm
Fri, 20 Jul 2012 12:45:12 +0200
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child 48368 dc538eef2cf2
permissions -rw-r--r--
minimal build_job;
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/*  Title:      Pure/System/build.scala
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    Author:     Makarius
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Build and manage Isabelle sessions.
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*/
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package isabelle
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import java.io.File
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import scala.collection.mutable
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import scala.annotation.tailrec
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object Build
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{
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  /** session information **/
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  type Options = List[(String, Option[String])]
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  object Session
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  {
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    object Key
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    {
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      object Ordering extends scala.math.Ordering[Key]
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      {
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        def compare(key1: Key, key2: Key): Int =
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          key1.order compare key2.order match {
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            case 0 => key1.name compare key2.name
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            case ord => ord
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          }
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      }
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    }
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    sealed case class Key(name: String, order: Int)
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    {
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      override def toString: String = name
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    }
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    sealed case class Info(
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      dir: Path,
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      description: String,
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      options: Options,
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      theories: List[(Options, String)],
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      files: List[String])
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    object Queue
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    {
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      val empty: Queue = new Queue()
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    }
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    final class Queue private(
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      keys: Map[String, Key] = Map.empty,
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      graph: Graph[Key, Info] = Graph.empty(Key.Ordering))
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    {
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      def defined(name: String): Boolean = keys.isDefinedAt(name)
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      def + (key: Key, info: Info, parent: Option[String]): Queue =
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      {
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        val keys1 =
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          if (defined(key.name)) error("Duplicate session: " + quote(key.name))
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          else keys + (key.name -> key)
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        val graph1 =
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          try {
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            graph.new_node(key, info).add_deps_acyclic(key, parent.toList.map(keys(_)))
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          }
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          catch {
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            case exn: Graph.Cycles[_] =>
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              error(cat_lines(exn.cycles.map(cycle =>
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                "Cyclic session dependency of " +
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                  cycle.map(key => quote(key.toString)).mkString(" via "))))
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          }
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        new Queue(keys1, graph1)
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      }
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      def required(names: List[String]): Queue =
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      {
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        val req = graph.all_preds(names.map(keys(_))).map(_.name).toSet
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        val keys1 = keys -- keys.keySet.filter(name => !req(name))
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        val graph1 = graph.restrict(key => keys1.isDefinedAt(key.name))
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        new Queue(keys1, graph1)
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      }
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      def topological_order: List[(Key, Info)] =
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        graph.topological_order.map(key => (key, graph.get_node(key)))
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    }
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  }
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  /* parsing */
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  private case class Session_Entry(
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    name: String,
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    reset: Boolean,
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    order: Int,
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    path: Option[String],
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    parent: Option[String],
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    description: String,
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    options: Options,
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    theories: List[(Options, List[String])],
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    files: List[String])
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  private object Parser extends Parse.Parser
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  {
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    val SESSION = "session"
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    val IN = "in"
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    val DESCRIPTION = "description"
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    val OPTIONS = "options"
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    val THEORIES = "theories"
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    val FILES = "files"
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    val syntax =
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      Outer_Syntax.empty + "!" + "(" + ")" + "+" + "," + "=" + "[" + "]" +
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        SESSION + IN + DESCRIPTION + OPTIONS + THEORIES + FILES
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    val session_entry: Parser[Session_Entry] =
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    {
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      val session_name = atom("session name", _.is_name)
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      val theory_name = atom("theory name", _.is_name)
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      val option =
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        name ~ opt(keyword("=") ~! name ^^ { case _ ~ x => x }) ^^ { case x ~ y => (x, y) }
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      val options = keyword("[") ~> repsep(option, keyword(",")) <~ keyword("]")
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      val theories =
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        keyword(THEORIES) ~! ((options | success(Nil)) ~ rep1(theory_name)) ^^
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          { case _ ~ (x ~ y) => (x, y) }
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      ((keyword(SESSION) ~! session_name) ^^ { case _ ~ x => x }) ~
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        (keyword("!") ^^^ true | success(false)) ~
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        (keyword("(") ~! (nat <~ keyword(")")) ^^ { case _ ~ x => x } | success(Integer.MAX_VALUE)) ~
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        (opt(keyword(IN) ~! string ^^ { case _ ~ x => x })) ~
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        (keyword("=") ~> opt(session_name <~ keyword("+"))) ~
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        (keyword(DESCRIPTION) ~! text ^^ { case _ ~ x => x } | success("")) ~
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        (keyword(OPTIONS) ~! options ^^ { case _ ~ x => x } | success(Nil)) ~
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        rep(theories) ~
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        (keyword(FILES) ~! rep1(path) ^^ { case _ ~ x => x } | success(Nil)) ^^
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          { case a ~ b ~ c ~ d ~ e ~ f ~ g ~ h ~ i => Session_Entry(a, b, c, d, e, f, g, h, i) }
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    }
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    def parse_entries(root: File): List[Session_Entry] =
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    {
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      val toks = syntax.scan(Standard_System.read_file(root))
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      parse_all(rep(session_entry), Token.reader(toks, root.toString)) 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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    }
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  }
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  /* find sessions */
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  private val ROOT = Path.explode("ROOT")
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  private val SESSIONS = Path.explode("etc/sessions")
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  private def is_pure(name: String): Boolean = name == "RAW" || name == "Pure"
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  private def sessions_root(dir: Path, root: File, queue: Session.Queue): Session.Queue =
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  {
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    (queue /: Parser.parse_entries(root))((queue1, entry) =>
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      try {
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        if (entry.name == "") error("Bad session name")
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        val full_name =
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          if (is_pure(entry.name)) {
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            if (entry.parent.isDefined) error("Illegal parent session")
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            else entry.name
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          }
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          else
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            entry.parent match {
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              case Some(parent_name) if queue1.defined(parent_name) =>
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                if (entry.reset) entry.name
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                else parent_name + "-" + entry.name
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              case _ => error("Bad parent session")
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            }
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        val path =
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          entry.path match {
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            case Some(p) => Path.explode(p)
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            case None => Path.basic(entry.name)
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          }
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        val key = Session.Key(full_name, entry.order)
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        val info = Session.Info(dir + path, entry.description, entry.options,
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          entry.theories.map({ case (x, ys) => ys.map(y => (x, y)) }).flatten, entry.files)
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        queue1 + (key, info, entry.parent)
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      }
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      catch {
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        case ERROR(msg) =>
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          error(msg + "\nThe error(s) above occurred in session entry " +
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            quote(entry.name) + " (file " + quote(root.toString) + ")")
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      })
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  }
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  private def sessions_dir(strict: Boolean, dir: Path, queue: Session.Queue): Session.Queue =
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  {
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    val root = Isabelle_System.platform_file(dir + ROOT)
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    if (root.isFile) sessions_root(dir, root, queue)
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    else if (strict) error("Bad session root file: " + quote(root.toString))
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    else queue
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  }
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  private def sessions_catalog(dir: Path, catalog: File, queue: Session.Queue): Session.Queue =
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  {
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    val dirs =
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      split_lines(Standard_System.read_file(catalog)).
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        filterNot(line => line == "" || line.startsWith("#"))
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    (queue /: dirs)((queue1, dir1) =>
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      try {
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        val dir2 = dir + Path.explode(dir1)
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        if (Isabelle_System.platform_file(dir2).isDirectory) sessions_dir(true, dir2, queue1)
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        else error("Bad session directory: " + dir2.toString)
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      }
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      catch {
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        case ERROR(msg) =>
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          error(msg + "\nThe error(s) above occurred in session catalog " + quote(catalog.toString))
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      })
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  }
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  def find_sessions(more_dirs: List[Path]): Session.Queue =
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  {
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    var queue = Session.Queue.empty
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    for (dir <- Isabelle_System.components()) {
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      queue = sessions_dir(false, dir, queue)
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      val catalog = Isabelle_System.platform_file(dir + SESSIONS)
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      if (catalog.isFile)
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        queue = sessions_catalog(dir, catalog, queue)
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    }
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    for (dir <- more_dirs) queue = sessions_dir(true, dir, queue)
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    queue
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  }
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  /** build **/
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  private def build_job(build_images: Boolean,  // FIXME
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    key: Session.Key, info: Session.Info): Isabelle_System.Bash_Job =
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  {
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    val cwd = Isabelle_System.platform_file(info.dir)
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    val script =
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      if (is_pure(key.name)) "./build " + key.name
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      else """echo "Bad session" >&2; exit 2"""
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    new Isabelle_System.Bash_Job(cwd, null, script)
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  }
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  def build(all_sessions: Boolean, build_images: Boolean, list_only: Boolean,
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    more_dirs: List[Path], options: List[String], sessions: List[String]): Int =
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  {
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    val full_queue = find_sessions(more_dirs)
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    sessions.filter(name => !full_queue.defined(name)) match {
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      case Nil =>
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      case bad => error("Undefined session(s): " + commas_quote(bad))
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    }
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    val required_queue =
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      if (all_sessions) full_queue
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      else full_queue.required(sessions)
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    for ((key, info) <- required_queue.topological_order) {
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      if (list_only) println(key.name + " in " + info.dir)
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      else {
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        val (out, err, rc) = build_job(build_images, key, info).join
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        java.lang.System.err.print(err)
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      }
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    }
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    0
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  }
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  /* command line entry point */
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  def main(args: Array[String])
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  {
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    Command_Line.tool {
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      args.toList match {
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        case
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          Properties.Value.Boolean(all_sessions) ::
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          Properties.Value.Boolean(build_images) ::
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          Properties.Value.Boolean(list_only) ::
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          Command_Line.Chunks(more_dirs, options, sessions) =>
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            build(all_sessions, build_images, list_only,
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              more_dirs.map(Path.explode), options, sessions)
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        case _ => error("Bad arguments:\n" + cat_lines(args))
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      }
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    }
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  }
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}
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