src/Pure/PIDE/resources.scala
author wenzelm
Mon, 17 Sep 2018 21:50:14 +0200
changeset 69008 d55783ea6cf6
parent 69007 2ac19d346b83
child 69255 800b1ce96fce
permissions -rw-r--r--
more detailed session dependencies, with conditions for theories;
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/*  Title:      Pure/PIDE/resources.scala
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    Author:     Makarius
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Resources for theories and auxiliary files.
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*/
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package isabelle
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import scala.annotation.tailrec
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import scala.util.parsing.input.Reader
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import java.io.{File => JFile}
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class Resources(
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  val session_base: Sessions.Base,
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  val log: Logger = No_Logger)
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{
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  resources =>
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  def thy_path(path: Path): Path = path.ext("thy")
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  /* file-system operations */
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  def append(dir: String, source_path: Path): String =
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    (Path.explode(dir) + source_path).expand.implode
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  def append(node_name: Document.Node.Name, source_path: Path): String =
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    append(node_name.master_dir, source_path)
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  /* source files of Isabelle/ML bootstrap */
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  def source_file(raw_name: String): Option[String] =
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  {
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    if (Path.is_wellformed(raw_name)) {
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      if (Path.is_valid(raw_name)) {
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        def check(p: Path): Option[Path] = if (p.is_file) Some(p) else None
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        val path = Path.explode(raw_name)
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        val path1 =
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          if (path.is_absolute || path.is_current) check(path)
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          else {
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            check(Path.explode("~~/src/Pure") + path) orElse
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              (if (Isabelle_System.getenv("ML_SOURCES") == "") None
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               else check(Path.explode("$ML_SOURCES") + path))
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          }
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        Some(File.platform_path(path1 getOrElse path))
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      }
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      else None
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    }
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    else Some(raw_name)
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  }
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  /* theory files */
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  def loaded_files(syntax: Outer_Syntax, name: Document.Node.Name): () => List[Path] =
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  {
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    val (is_utf8, raw_text) =
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      with_thy_reader(name, reader => (Scan.reader_is_utf8(reader), reader.source.toString))
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    () => {
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      if (syntax.load_commands_in(raw_text)) {
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        val text = Symbol.decode(Scan.reader_decode_utf8(is_utf8, raw_text))
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        val spans = syntax.parse_spans(text)
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        val dir = Path.explode(name.master_dir)
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        spans.iterator.map(Command.span_files(syntax, _)._1).flatten.
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          map(a => (dir + Path.explode(a)).expand).toList
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      }
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      else Nil
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    }
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  }
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  def pure_files(syntax: Outer_Syntax, dir: Path): List[Path] =
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  {
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    val roots =
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      for { (name, _) <- Thy_Header.ml_roots }
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      yield (dir + Path.explode(name)).expand
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    val files =
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      for {
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        (path, (_, theory)) <- roots zip Thy_Header.ml_roots
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        file <- loaded_files(syntax, Document.Node.Name(path.implode, path.dir.implode, theory))()
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      } yield file
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    roots ::: files
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  }
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  def theory_name(qualifier: String, theory: String): String =
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    if (Long_Name.is_qualified(theory) || session_base.global_theories.isDefinedAt(theory))
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      theory
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    else Long_Name.qualify(qualifier, theory)
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  def import_name(qualifier: String, dir: String, s: String): Document.Node.Name =
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  {
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    val theory = theory_name(qualifier, Thy_Header.import_name(s))
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    if (session_base.loaded_theory(theory)) Document.Node.Name.loaded_theory(theory)
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    else {
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      session_base.known_theory(theory) match {
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        case Some(node_name) => node_name
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        case None =>
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          if (Thy_Header.is_base_name(s) && Long_Name.is_qualified(s))
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            Document.Node.Name.loaded_theory(theory)
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          else {
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            val path = Path.explode(s)
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            val node = append(dir, thy_path(path))
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            val master_dir = append(dir, path.dir)
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            Document.Node.Name(node, master_dir, theory)
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          }
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      }
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    }
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  }
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  def import_name(name: Document.Node.Name, s: String): Document.Node.Name =
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    import_name(session_base.theory_qualifier(name), name.master_dir, s)
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  def standard_import(base: Sessions.Base, qualifier: String, dir: String, s: String): String =
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  {
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    val name = import_name(qualifier, dir, s)
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    val s1 =
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      if (session_base.loaded_theory(name)) name.theory
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      else {
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        (try { Some(name.path) } catch { case ERROR(_) => None }) match {
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          case None => s
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          case Some(path) =>
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            session_base.known.get_file(path.file) match {
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              case Some(name1) if base.theory_qualifier(name1) != qualifier =>
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                name1.theory
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              case Some(name1) if Thy_Header.is_base_name(s) =>
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                name1.theory_base_name
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              case _ => s
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            }
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        }
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      }
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    val name2 = import_name(qualifier, dir, s1)
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    if (name.node == name2.node) s1 else s
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  }
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  def with_thy_reader[A](name: Document.Node.Name, f: Reader[Char] => A): A =
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  {
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    val path = name.path
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    if (path.is_file) {
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      val reader = Scan.byte_reader(path.file)
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      try { f(reader) } finally { reader.close }
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    }
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    else if (name.node == name.theory)
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      error("Cannot load theory " + quote(name.theory))
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    else error ("Cannot load theory file " + path)
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  }
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  def check_thy_reader(node_name: Document.Node.Name, reader: Reader[Char],
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    start: Token.Pos = Token.Pos.command, strict: Boolean = true): Document.Node.Header =
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  {
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    if (node_name.is_theory && reader.source.length > 0) {
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      try {
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        val header = Thy_Header.read(reader, start, strict)
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        val base_name = node_name.theory_base_name
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        val (name, pos) = header.name
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        if (base_name != name)
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          error("Bad theory name " + quote(name) +
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            " for file " + thy_path(Path.basic(base_name)) + Position.here(pos) +
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            Completion.report_theories(pos, List(base_name)))
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        val imports =
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          header.imports.map({ case (s, pos) =>
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            val name = import_name(node_name, s)
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            if (Sessions.exclude_theory(name.theory_base_name))
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              error("Bad theory name " + quote(name.theory_base_name) + Position.here(pos))
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            (name, pos)
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          })
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        Document.Node.Header(imports, header.keywords, header.abbrevs)
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      }
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      catch { case exn: Throwable => Document.Node.bad_header(Exn.message(exn)) }
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    }
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    else Document.Node.no_header
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  }
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  def check_thy(name: Document.Node.Name, start: Token.Pos = Token.Pos.command,
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      strict: Boolean = true): Document.Node.Header =
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    with_thy_reader(name, check_thy_reader(name, _, start, strict))
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  /* special header */
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  def special_header(name: Document.Node.Name): Option[Document.Node.Header] =
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  {
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    val imports =
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      if (name.theory == Sessions.root_name) List(import_name(name, Sessions.theory_name))
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      else if (Thy_Header.is_ml_root(name.theory)) List(import_name(name, Thy_Header.ML_BOOTSTRAP))
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      else if (Thy_Header.is_bootstrap(name.theory)) List(import_name(name, Thy_Header.PURE))
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      else Nil
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    if (imports.isEmpty) None
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    else Some(Document.Node.Header(imports.map((_, Position.none))))
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  }
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  /* blobs */
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  def undefined_blobs(nodes: Document.Nodes): List[Document.Node.Name] =
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    (for {
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      (node_name, node) <- nodes.iterator
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      if !session_base.loaded_theory(node_name)
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      cmd <- node.load_commands.iterator
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      name <- cmd.blobs_undefined.iterator
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    } yield name).toList
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  /* document changes */
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  def parse_change(
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      reparse_limit: Int,
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      previous: Document.Version,
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      doc_blobs: Document.Blobs,
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      edits: List[Document.Edit_Text],
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      consolidate: List[Document.Node.Name]): Session.Change =
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    Thy_Syntax.parse_change(resources, reparse_limit, previous, doc_blobs, edits, consolidate)
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  def commit(change: Session.Change) { }
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  /* theory and file dependencies */
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  def dependencies(
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      thys: List[(Document.Node.Name, Position.T)],
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      progress: Progress = No_Progress): Dependencies[Unit] =
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    Dependencies.empty[Unit].require_thys((), thys, progress = progress)
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  def session_dependencies(info: Sessions.Info, progress: Progress = No_Progress)
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    : Dependencies[Options] =
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  {
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    val qualifier = info.name
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    val dir = info.dir.implode
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    (Dependencies.empty[Options] /: info.theories)({ case (dependencies, (options, thys)) =>
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      dependencies.require_thys(options,
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        for { (thy, pos) <- thys } yield (import_name(qualifier, dir, thy), pos),
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        progress = progress)
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    })
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  }
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  object Dependencies
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  {
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    def empty[A]: Dependencies[A] = new Dependencies[A](Nil, Map.empty)
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    private def show_path(names: List[Document.Node.Name]): String =
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      names.map(name => quote(name.theory)).mkString(" via ")
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    private def cycle_msg(names: List[Document.Node.Name]): String =
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      "Cyclic dependency of " + show_path(names)
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    private def required_by(initiators: List[Document.Node.Name]): String =
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      if (initiators.isEmpty) ""
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      else "\n(required by " + show_path(initiators.reverse) + ")"
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  }
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  final class Dependencies[A] private(
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    rev_entries: List[Document.Node.Entry],
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    seen: Map[Document.Node.Name, A])
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  {
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    private def cons(entry: Document.Node.Entry): Dependencies[A] =
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      new Dependencies[A](entry :: rev_entries, seen)
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    def require_thy(adjunct: A,
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      thy: (Document.Node.Name, Position.T),
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      initiators: List[Document.Node.Name] = Nil,
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      progress: Progress = No_Progress): Dependencies[A] =
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    {
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      val (name, pos) = thy
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      def message: String =
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        "The error(s) above occurred for theory " + quote(name.theory) +
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          Dependencies.required_by(initiators) + Position.here(pos)
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      if (seen.isDefinedAt(name)) this
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      else {
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        val dependencies1 = new Dependencies[A](rev_entries, seen + (name -> adjunct))
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        if (session_base.loaded_theory(name)) dependencies1
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        else {
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          try {
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            if (initiators.contains(name)) error(Dependencies.cycle_msg(initiators))
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            progress.expose_interrupt()
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            val header =
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              try { check_thy(name, Token.Pos.file(name.node)).cat_errors(message) }
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              catch { case ERROR(msg) => cat_error(msg, message) }
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            val entry = Document.Node.Entry(name, header)
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            dependencies1.require_thys(adjunct, header.imports,
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              initiators = name :: initiators, progress = progress).cons(entry)
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          }
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          catch {
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            case e: Throwable =>
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              dependencies1.cons(Document.Node.Entry(name, Document.Node.bad_header(Exn.message(e))))
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          }
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        }
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      }
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    }
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    def require_thys(adjunct: A,
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        thys: List[(Document.Node.Name, Position.T)],
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        progress: Progress = No_Progress,
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        initiators: List[Document.Node.Name] = Nil): Dependencies[A] =
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      (this /: thys)(_.require_thy(adjunct, _, progress = progress, initiators = initiators))
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    def entries: List[Document.Node.Entry] = rev_entries.reverse
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    def theories: List[Document.Node.Name] = entries.map(_.name)
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    def adjunct_theories: List[(A, Document.Node.Name)] = theories.map(name => (seen(name), name))
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    def errors: List[String] = entries.flatMap(_.header.errors)
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    def check_errors: Dependencies[A] =
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      errors match {
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        case Nil => this
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        case errs => error(cat_lines(errs))
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      }
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    lazy val loaded_theories: Graph[String, Outer_Syntax] =
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      (session_base.loaded_theories /: entries)({ case (graph, entry) =>
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        val name = entry.name.theory
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        val imports = entry.header.imports.map(p => p._1.theory)
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        val graph1 = (graph /: (name :: imports))(_.default_node(_, Outer_Syntax.empty))
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        val graph2 = (graph1 /: imports)(_.add_edge(_, name))
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        val syntax0 = if (name == Thy_Header.PURE) List(Thy_Header.bootstrap_syntax) else Nil
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        val syntax1 = (name :: graph2.imm_preds(name).toList).map(graph2.get_node(_))
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        val syntax = Outer_Syntax.merge(syntax0 ::: syntax1) + entry.header
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        graph2.map_node(name, _ => syntax)
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      })
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    def loaded_files: List[(String, List[Path])] =
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    {
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      theories.map(_.theory) zip
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        Par_List.map((e: () => List[Path]) => e(),
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          theories.map(name => resources.loaded_files(loaded_theories.get_node(name.theory), name)))
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    }
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    def imported_files: List[Path] =
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    {
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      val base_theories =
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        loaded_theories.all_preds(theories.map(_.theory)).
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          filter(session_base.loaded_theories.defined(_))
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      base_theories.map(theory => session_base.known.theories(theory).name.path) :::
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      base_theories.flatMap(session_base.known.loaded_files(_))
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    }
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    lazy val overall_syntax: Outer_Syntax =
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      Outer_Syntax.merge(loaded_theories.maximals.map(loaded_theories.get_node(_)))
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    override def toString: String = entries.toString
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  }
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}