docbook-ebnf: refactor to pkgs/by-name/

pkgs/by-name/do/docbook-ebnf/package.nix

@@ -0,0 +1,47 @@
+{
+  lib,
+  stdenvNoCC,
+  fetchurl,
+}:
+
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "docbook-ebnf";
+  version = "1.2b1";
+
+  src = fetchurl {
+    url = "https://docbook.org/xml/ebnf/${finalAttrs.version}/dbebnf.dtd";
+    hash = "sha256-JfVcDXKTEaYXAFO10IljctqAi2lePJLWCL6OwnQrNlY=";
+  };
+  catalog = builtins.path {
+    name = "docbook-ebnf.cat";
+    path = ./docbook-ebnf.cat;
+  };
+
+  dontUnpack = true;
+
+  installPhase = ''
+    runHook preInstall
+
+    dst=$out/xml/dtd/docbook-ebnf
+    mkdir -p $dst
+
+    cp -p $src $dst/$(stripHash $src)
+    cp -p $catalog $dst/$(stripHash $catalog)
+
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "DocBook EBNF module";
+    longDescription = ''
+      The "EBNF" schema adds EBNF (Extended Backus-Naur Forms) elements elements
+      to DocBook.
+
+      This is an official product of the OASIS DocBook Technical Committee.
+    '';
+    homepage = "https://docbook.org/";
+    license = lib.licenses.free;
+    maintainers = with lib.maintainers; [ rc-zb ];
+    platforms = lib.platforms.unix;
+  };
+})

pkgs/top-level/all-packages.nix

@@ -26837,7 +26837,7 @@ with pkgs;
 
   docbook_xml_dtd_45 = docbook_4_5;
 
-  docbook_xml_ebnf_dtd = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook-ebnf { };
+  docbook_xml_ebnf_dtd = docbook-ebnf;
 
   inherit (callPackages ../data/sgml+xml/stylesheets/xslt/docbook-xsl { })
     docbook-xsl-nons