doclifter: 2.19 -> 2.20

* doclifter: 2.19 -> 2.20
 (#150219)

* doclifter: fix manlifter

Co-authored-by: Jörg Thalheim <joerg@thalheim.io>

pkgs/development/tools/misc/doclifter/default.nix

@@ -1,13 +1,14 @@
-{lib, stdenv, fetchurl, python3}:
+{ lib, stdenv, fetchurl, python3, makeWrapper, libxml2 }:
 
 stdenv.mkDerivation rec {
   pname = "doclifter";
-  version = "2.19";
+  version = "2.20";
   src = fetchurl {
     url = "http://www.catb.org/~esr/${pname}/${pname}-${version}.tar.gz";
-    sha256 = "1as6z7mdjrrkw2kism41q5ybvyzvwcmj9qzla2fz98v9f4jbj2s2";
+    sha256 = "sha256-BEuMbICJ8TD3+VjUr8rmhss7XlPNjxSy1P0SkmKLPsc=";
   };
   buildInputs = [ python3 ];
+  nativeBuildInputs = [ python3 makeWrapper ];
 
   strictDeps = true;
 
@@ -16,7 +17,12 @@ stdenv.mkDerivation rec {
   preInstall = ''
     mkdir -p $out/bin
     mkdir -p $out/share/man/man1
+    substituteInPlace manlifter \
+      --replace '/usr/bin/env python2' '/usr/bin/env python3'
+    2to3 -w manlifter
     cp manlifter $out/bin
+    wrapProgram "$out/bin/manlifter" \
+        --prefix PATH : "${libxml2}/bin:$out/bin"
     cp manlifter.1 $out/share/man/man1
   '';