libmodulemd: init at 2.6.0

Includes a patch for the usual pygobject override stuff.
Pending upstream submission.

pkgs/development/libraries/libmodulemd/default.nix

@@ -0,0 +1,59 @@
+{ stdenv
+, fetchFromGitHub
+, pkgconfig
+, meson
+, ninja
+, gobject-introspection
+, python3
+, libyaml
+, gtk-doc
+, docbook_xsl
+, docbook_xml_dtd_412
+, glib
+}:
+
+stdenv.mkDerivation rec {
+  pname = "libmodulemd";
+  version = "2.6.0";
+
+  outputs = [ "out" "devdoc" "py" ];
+
+  src = fetchFromGitHub {
+    owner = "fedora-modularity";
+    repo = pname;
+    rev = "${pname}-${version}";
+    sha256 = "0gizfmzs6jrzb29lwcimm5dq3027935xbzwgkbvbp67zcmjd3y5i";
+  };
+
+  patches = [
+    ./pygobject-dir.patch
+  ];
+
+  nativeBuildInputs = [
+    pkgconfig
+    meson
+    ninja
+    gtk-doc
+    docbook_xsl
+    docbook_xml_dtd_412
+    gobject-introspection
+  ];
+
+  buildInputs = [
+    libyaml
+    glib
+  ];
+
+  mesonFlags = [
+    "-Ddeveloper_build=false"
+    "-Dpygobject_override_dir=${placeholder "py"}/${python3.sitePackages}/gi/overrides"
+  ];
+
+  meta = with stdenv.lib; {
+    description = "C Library for manipulating module metadata files";
+    homepage = "https://github.com/fedora-modularity/libmodulemd";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+    platforms = platforms.linux;
+  };
+}

pkgs/development/libraries/libmodulemd/pygobject-dir.patch

@@ -0,0 +1,45 @@
+diff --git a/bindings/python/meson.build b/bindings/python/meson.build
+index 4358b79..61fd5a5 100644
+--- a/bindings/python/meson.build
++++ b/bindings/python/meson.build
+@@ -1,3 +1,5 @@
++pygobject_override_dir = get_option('pygobject_override_dir')
++
+ get_overridedir = '''
+ import os
+ import sysconfig
+@@ -21,7 +23,7 @@ print(overridedir)
+ '''
+ 
+ # Python 3
+-if (get_option('with_py3_overrides'))
++if (get_option('with_py3_overrides')) and pygobject_override_dir == ''
+   ret = run_command([python3, '-c', get_overridedir])
+ 
+   if ret.returncode() != 0
+@@ -34,7 +36,7 @@ if (get_option('with_py3_overrides'))
+ endif
+ 
+ # Python 2
+-if (get_option('with_py2_overrides'))
++if (get_option('with_py2_overrides')) and pygobject_override_dir == ''
+   ret2 = run_command([python2, '-c', get_overridedir])
+ 
+   if ret2.returncode() != 0
+@@ -45,3 +47,7 @@ if (get_option('with_py2_overrides'))
+ 
+   install_data('gi/overrides/Modulemd.py', install_dir: pygobject2_override_dir)
+ endif
++
++if pygobject_override_dir != ''
++    install_data('gi/overrides/Modulemd.py', install_dir: pygobject_override_dir)
++endif
+diff --git a/meson_options.txt b/meson_options.txt
+index 147419f..9071a04 100644
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -18,3 +18,4 @@ option('skip_introspection', type : 'boolean', value : false)
+ option('python_name', type : 'string')
+ option('with_py2_overrides', type : 'boolean', value : false)
+ option('with_py3_overrides', type : 'boolean', value : true)
++option('pygobject_override_dir', type : 'string', value : '', description: 'Path to pygobject overrides directory')

pkgs/top-level/all-packages.nix

@@ -12346,6 +12346,8 @@ in
 
   libvdpau = callPackage ../development/libraries/libvdpau { };
 
+  libmodulemd = callPackage ../development/libraries/libmodulemd { };
+
   libvdpau-va-gl = callPackage ../development/libraries/libvdpau-va-gl { };
 
   libversion = callPackage ../development/libraries/libversion { };