diff -r fd87490429aa -r 2a99fcb283ee src/Pure/Admin/build_foiltex.scala
--- a/src/Pure/Admin/build_foiltex.scala	Tue Mar 07 22:28:48 2023 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,105 +0,0 @@
-/*  Title:      Pure/Admin/build_foiltex.scala
-    Author:     Makarius
-
-Build Isabelle component for FoilTeX.
-
-See also https://ctan.org/pkg/foiltex
-*/
-
-package isabelle
-
-
-object Build_Foiltex {
-  /* build FoilTeX component */
-
-  val default_url = "https://mirrors.ctan.org/macros/latex/contrib/foiltex.zip"
-
-  def build_foiltex(
-    download_url: String = default_url,
-    target_dir: Path = Path.current,
-    progress: Progress = new Progress
-  ): Unit = {
-    Isabelle_System.with_tmp_file("download", ext = "zip") { download_file =>
-      Isabelle_System.with_tmp_dir("download") { download_dir =>
-
-        /* download */
-
-        Isabelle_System.download_file(download_url, download_file, progress = progress)
-        Isabelle_System.extract(download_file, download_dir)
-
-        val foiltex_dir = File.get_dir(download_dir, title = download_url)
-
-
-        /* component */
-
-        val README = Path.explode("README")
-        val version = {
-          val Version = """^.*Instructions for FoilTeX Version\s*(.*)$""".r
-          split_lines(File.read(foiltex_dir + README))
-            .collectFirst({ case Version(v) => v })
-            .getOrElse(error("Failed to detect version in " + README))
-        }
-
-        val component = "foiltex-" + version
-        val component_dir =
-          Components.Directory(target_dir + Path.basic(component)).create(progress = progress)
-
-        Isabelle_System.extract(download_file, component_dir.path, strip = true)
-
-        Isabelle_System.bash("pdflatex foiltex.ins", cwd = component_dir.path.file).check
-        (component_dir.path + Path.basic("foiltex.log")).file.delete()
-
-
-        /* settings */
-
-        component_dir.write_settings("""
-ISABELLE_FOILTEX_HOME="$COMPONENT"
-""")
-
-
-        /* README */
-
-        Isabelle_System.move_file(component_dir.README,
-          component_dir.path + Path.basic("README.flt"))
-
-        File.write(component_dir.README,
-          """This is FoilTeX from
-""" + download_url + """
-
-
-    Makarius
-    """ + Date.Format.date(Date.now()) + "\n")
-      }
-    }
-  }
-
-
-  /* Isabelle tool wrapper */
-
-  val isabelle_tool =
-    Isabelle_Tool("build_foiltex", "build component for FoilTeX",
-      Scala_Project.here,
-      { args =>
-        var target_dir = Path.current
-        var download_url = default_url
-
-        val getopts = Getopts("""
-Usage: isabelle build_foiltex [OPTIONS]
-
-  Options are:
-    -D DIR       target directory (default ".")
-    -U URL       download URL (default: """" + default_url + """")
-
-  Build component for FoilTeX: slides in LaTeX.
-""",
-          "D:" -> (arg => target_dir = Path.explode(arg)),
-          "U:" -> (arg => download_url = arg))
-
-        val more_args = getopts(args)
-        if (more_args.nonEmpty) getopts.usage()
-
-        val progress = new Console_Progress()
-
-        build_foiltex(download_url = download_url, target_dir = target_dir, progress = progress)
-      })
-}