discontinued obsolete header "files" -- these are loaded explicitly after exploring dependencies;
/* Title: Pure/Thy/thy_info.scala
Author: Makarius
Theory and file dependencies.
*/
package isabelle
import java.util.concurrent.{Future => JFuture}
class Thy_Info(thy_load: Thy_Load)
{
/* messages */
private def show_path(names: List[Document.Node.Name]): String =
names.map(name => quote(name.theory)).mkString(" via ")
private def cycle_msg(names: List[Document.Node.Name]): String =
"Cyclic dependency of " + show_path(names)
private def required_by(initiators: List[Document.Node.Name]): String =
if (initiators.isEmpty) ""
else "\n(required by " + show_path(initiators.reverse) + ")"
/* dependencies */
sealed case class Dep(
name: Document.Node.Name,
header: Document.Node.Header)
{
def load_files(syntax: Outer_Syntax): List[String] =
{
val string = thy_load.with_thy_text(name, _.toString)
if (thy_load.body_files_test(syntax, string))
thy_load.body_files(syntax, string)
else Nil
}
}
object Dependencies
{
val empty = new Dependencies(Nil, Nil, Set.empty)
}
final class Dependencies private(
rev_deps: List[Dep],
val keywords: Thy_Header.Keywords,
val seen: Set[Document.Node.Name])
{
def :: (dep: Dep): Dependencies =
new Dependencies(dep :: rev_deps, dep.header.keywords ::: keywords, seen)
def + (name: Document.Node.Name): Dependencies =
new Dependencies(rev_deps, keywords, seen = seen + name)
def deps: List[Dep] = rev_deps.reverse
lazy val syntax: Outer_Syntax = thy_load.base_syntax.add_keywords(keywords)
def loaded_theories: Set[String] =
(thy_load.loaded_theories /: rev_deps) { case (loaded, dep) => loaded + dep.name.theory }
def load_files: List[Path] =
{
// FIXME par.map (!?)
((Nil: List[Path]) /: rev_deps) {
case (files, dep) =>
dep.load_files(syntax).map(a => Path.explode(dep.name.dir) + Path.explode(a)) ::: files
}
}
}
private def require_thys(initiators: List[Document.Node.Name],
required: Dependencies, names: List[Document.Node.Name]): Dependencies =
(required /: names)(require_thy(initiators, _, _))
private def require_thy(initiators: List[Document.Node.Name],
required: Dependencies, name: Document.Node.Name): Dependencies =
{
if (required.seen(name)) required
else if (thy_load.loaded_theories(name.theory)) required + name
else {
def err(msg: String): Nothing =
cat_error(msg, "The error(s) above occurred while examining theory " +
quote(name.theory) + required_by(initiators))
try {
if (initiators.contains(name)) error(cycle_msg(initiators))
val header =
try { thy_load.check_thy(name) }
catch { case ERROR(msg) => err(msg) }
Dep(name, header) :: require_thys(name :: initiators, required + name, header.imports)
}
catch {
case e: Throwable =>
Dep(name, Document.Node.bad_header(Exn.message(e))) :: (required + name)
}
}
}
def dependencies(names: List[Document.Node.Name]): Dependencies =
require_thys(Nil, Dependencies.empty, names)
}