diff -r fd87490429aa -r 2a99fcb283ee src/Pure/Admin/component_lipics.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Admin/component_lipics.scala	Tue Mar 07 22:54:44 2023 +0100
@@ -0,0 +1,110 @@
+/*  Title:      Pure/Admin/component_lipics.scala
+    Author:     Makarius
+
+Build Isabelle component for Dagstuhl LIPIcs style.
+
+See also:
+
+  - https://github.com/dagstuhl-publishing/styles
+  - https://submission.dagstuhl.de/documentation/authors
+  - https://www.dagstuhl.de/en/publications/lipics
+*/
+
+package isabelle
+
+
+object Component_LIPIcs {
+  /* files for document preparation */
+
+  val document_files: List[Path] =
+    for (name <- List("cc-by.pdf", "lipics-logo-bw.pdf", "lipics-v2021.cls"))
+      yield Path.explode("$ISABELLE_LIPICS_HOME/" + name)
+
+
+  /* build lipics component */
+
+  val default_url = "https://github.com/dagstuhl-publishing/styles/archive/refs/tags/v2021.1.2.tar.gz"
+
+  def build_lipics(
+    download_url: String = default_url,
+    target_dir: Path = Path.current,
+    progress: Progress = new Progress
+  ): Unit = {
+    Isabelle_System.with_tmp_file("download", ext = "tar.gz") { download_file =>
+      Isabelle_System.with_tmp_dir("download") { download_dir =>
+
+        /* download */
+
+        Isabelle_System.download_file(download_url, download_file, progress = progress)
+        Isabelle_System.extract(download_file, download_dir, strip = true)
+
+        val lipics_dir = download_dir + Path.explode("LIPIcs/authors")
+
+
+        /* component */
+
+        val version = {
+          val Version = """^*.* v(.*)$""".r
+          val changelog = Path.explode("CHANGELOG.md")
+          split_lines(File.read(lipics_dir + changelog))
+            .collectFirst({ case Version(v) => v })
+            .getOrElse(error("Failed to detect version in " + changelog))
+        }
+
+        val component = "lipics-" + version
+        val component_dir =
+          Components.Directory(target_dir + Path.basic(component)).create(progress = progress)
+
+        Isabelle_System.copy_dir(lipics_dir, component_dir.path)
+
+
+        /* settings */
+
+        component_dir.write_settings("""
+ISABELLE_LIPICS_HOME="$COMPONENT/authors"
+""")
+
+
+        /* README */
+
+        File.write(component_dir.README,
+          """This is the Dagstuhl LIPIcs style for authors from
+""" + download_url + """
+
+
+    Makarius
+    """ + Date.Format.date(Date.now()) + "\n")
+      }
+    }
+  }
+
+
+  /* Isabelle tool wrapper */
+
+  val isabelle_tool =
+    Isabelle_Tool("component_lipics", "build component for Dagstuhl LIPIcs style",
+      Scala_Project.here,
+      { args =>
+        var target_dir = Path.current
+        var download_url = default_url
+
+        val getopts = Getopts("""
+Usage: isabelle component_lipics [OPTIONS]
+
+  Options are:
+    -D DIR       target directory (default ".")
+    -U URL       download URL (default: """" + default_url + """")
+
+  Build component for Dagstuhl LIPIcs style.
+""",
+          "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_lipics(download_url = download_url, target_dir = target_dir, progress = progress)
+      })
+}