diff -r fd87490429aa -r 2a99fcb283ee src/Pure/Admin/component_prismjs.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Admin/component_prismjs.scala	Tue Mar 07 22:54:44 2023 +0100
@@ -0,0 +1,90 @@
+/*  Title:      Pure/Admin/component_prismjs.scala
+    Author:     Makarius
+
+Build Isabelle component for the Prism.js syntax highlighter.
+
+See also:
+  - https://prismjs.com
+  - https://www.npmjs.com/package/prismjs
+*/
+
+package isabelle
+
+
+object Component_Prismjs {
+  /* build prismjs component */
+
+  val default_version = "1.29.0"
+
+  def build_prismjs(
+    version: String = default_version,
+    target_dir: Path = Path.current,
+    progress: Progress = new Progress
+  ): Unit = {
+    Isabelle_System.require_command("npm", test = "help")
+
+
+    /* component name */
+
+    val component = "prismjs-" + version
+    val component_dir =
+      Components.Directory(target_dir + Path.basic(component)).create(progress = progress)
+
+
+    /* download */
+
+    Isabelle_System.with_tmp_dir("tmp") { tmp_dir =>
+      Isabelle_System.bash("npm init -y && npm install prismjs@" + Bash.string(version),
+        cwd = tmp_dir.file).check
+      Isabelle_System.copy_dir(tmp_dir + Path.explode("node_modules/prismjs"),
+        component_dir.path, direct = true)
+    }
+
+
+    /* settings */
+
+    component_dir.write_settings("""
+ISABELLE_PRISMJS_HOME="$COMPONENT"
+""")
+
+
+    /* README */
+
+    File.write(component_dir.README,
+      """This is Prism.js """ + version + """ from https://www.npmjs.com/package/prismjs
+
+
+        Makarius
+        """ + Date.Format.date(Date.now()) + "\n")
+  }
+
+
+  /* Isabelle tool wrapper */
+
+  val isabelle_tool =
+    Isabelle_Tool("component_prismjs", "build component for prismjs",
+      Scala_Project.here,
+      { args =>
+        var target_dir = Path.current
+        var version = default_version
+
+        val getopts = Getopts("""
+Usage: isabelle component_prismjs [OPTIONS]
+
+  Options are:
+    -D DIR       target directory (default ".")
+    -V VERSION   version (default: """" + default_version + """")
+
+  Build component for Prism.js.
+""",
+          "D:" -> (arg => target_dir = Path.explode(arg)),
+          "V:" -> (arg => version = arg))
+
+        val more_args = getopts(args)
+        if (more_args.nonEmpty) getopts.usage()
+
+        val progress = new Console_Progress()
+
+        build_prismjs(version = version, target_dir = target_dir, progress = progress)
+      })
+}