[PATCH 1/5] gnu: Add yml2.

+++ b/gnu/local.mk

+  %D%/packages/pep.scm				\

+++ b/gnu/packages/pep.scm

+;;; GNU Guix --- Functional package management for GNU

+;;; Copyright © 2016, 2020 Hartmut Goebel <h.goebel@crazy-compilers.com>

+;;;

+;;; This file is part of GNU Guix.

+;;;

+;;; GNU Guix is free software; you can redistribute it and/or modify it

+;;; under the terms of the GNU General Public License as published by

+;;; the Free Software Foundation; either version 3 of the License, or (at

+;;; your option) any later version.

+;;;

+;;; GNU Guix is distributed in the hope that it will be useful, but

+;;; WITHOUT ANY WARRANTY; without even the implied warranty of

+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+;;; GNU General Public License for more details.

+;;;

+;;; You should have received a copy of the GNU General Public License

+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

+

+(define-module (gnu packages pep)

+  #:use-module ((guix licenses) #:prefix license:)

+  #:use-module (guix packages)

+  #:use-module (guix hg-download)

+  #:use-module (guix build-system python)

+  #:use-module (gnu packages)

+  #:use-module (gnu packages xml))

+

+(define-public yml2

+  (package

+    (name "yml2")

+    (version "2.6.3")

+    (source (origin

+       (method hg-fetch)

+       (uri (hg-reference

+             (url "https://pep.foundation/dev/repos/yml2")

+             (changeset version)))

+       (file-name (string-append name "-" version "-checkout"))

+       (sha256

+        (base32 "10jjjyq1mz18zkzvxd62aba00h69gd9cglisqcvb81j67ml2v1bx"))))

+    (build-system python-build-system)

+    (propagated-inputs

+     `(("python-lxml" ,python-lxml)))

+    (home-page "https://fdik.org/yml/")

+    (synopsis "Use a Domain Specific Language for XML without defining

+a grammar")

+    (description "The YML compiler is a small Python script.  It

+provides the command line front end yml2c.  As default, it compiles

+your script and outputs to stdout, that usually is the terminal.  Your

+shell provides options to redirect the output into a pipe or a file.")

+    (license license:gpl2)))