musl support for polkit, add elogind

pkgs/applications/misc/elogind/default.nix

@@ -0,0 +1,82 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, meson
+, ninja
+, m4
+, gperf
+, getent
+, libcap
+, gettext
+, pkgconfig
+, udev
+, eudev
+, libxslt
+, python3
+, docbook5
+, docbook_xsl
+, docbook_xsl_ns
+, docbook_xml_dtd_42
+, docbook_xml_dtd_45
+
+# Defaulting to false because usually the rationale for using elogind is to
+# use it in situation where a systemd dependency does not work (especially
+# when building with musl, which elogind explicitly supports).
+, enableSystemd ? false
+}:
+
+with stdenv.lib;
+
+stdenv.mkDerivation rec {
+  pname = "elogind";
+  version = "239.5";
+
+  src = fetchFromGitHub {
+    owner = "elogind";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1gdiy4vbx4gs2hnb79x14zi530mlq26glxpzp3c95w8l058wj4ba";
+  };
+
+  nativeBuildInputs = [
+    meson
+    ninja
+    m4
+    pkgconfig
+    gperf
+    getent
+    libcap
+    gettext
+    libxslt.bin # xsltproc
+    docbook5 docbook_xsl docbook_xsl_ns docbook_xml_dtd_42 docbook_xml_dtd_45 # needed for docbook without Internet
+    (python3.withPackages (p: with p; [ lxml ]))  # fixes: man/meson.build:111:0: ERROR: Could not execute command "/build/source/tools/xml_helper.py".
+  ];
+
+  buildInputs =
+    if enableSystemd then [ udev ] else [ eudev ];
+
+  # Inspired by the systemd `preConfigure`.
+  # Conceptually we should patch all files required during the build, but not scripts
+  # supposed to run at run-time of the software (important for cross-compilation).
+  # This package seems to have mostly scripts that run at build time.
+  preConfigure = ''
+    for dir in tools src/test; do
+      patchShebangs $dir
+    done
+
+    patchShebangs src/basic/generate-*.{sh,py}
+  '';
+
+  mesonFlags = [
+    "-Drootprefix=${placeholder "out"}"
+    "-Dsysconfdir=${placeholder "out"}/etc"
+  ];
+
+  meta = {
+    homepage = https://github.com/elogind/elogind;
+    description = ''The systemd project's "logind", extracted to a standalone package'';
+    platforms = platforms.linux; # probably more
+    license = licenses.lgpl21Plus;
+    maintainers = with maintainers; [ nh2 ];
+  };
+}

pkgs/development/libraries/polkit/default.nix

@@ -1,9 +1,13 @@
 { stdenv, fetchurl, pkgconfig, glib, expat, pam, perl, fetchpatch
 , intltool, spidermonkey_60 , gobject-introspection, libxslt, docbook_xsl, dbus
 , docbook_xml_dtd_412, gtk-doc, coreutils
-, useSystemd ? stdenv.isLinux, systemd
+, useSystemd ? (stdenv.isLinux && !stdenv.hostPlatform.isMusl), systemd, elogind
 , withGnome ? true
-, doCheck ? stdenv.isLinux
+# A few tests currently fail on musl (polkitunixusertest, polkitunixgrouptest, polkitidentitytest segfault).
+# Not yet investigated; it may be due to the "Make netgroup support optional"
+# patch not updating the tests correctly yet, or doing something wrong,
+# or being unrelated to that.
+, doCheck ? (stdenv.isLinux && !stdenv.hostPlatform.isMusl)
 }:
 
 let
@@ -28,6 +32,15 @@ stdenv.mkDerivation rec {
       url = "https://gitlab.freedesktop.org/polkit/polkit/merge_requests/11.patch";
       sha256 = "17lv7xj5ksa27iv4zpm4zwd4iy8zbwjj4ximslfq3sasiz9kxhlp";
     })
+  ] ++ stdenv.lib.optionals stdenv.hostPlatform.isMusl [
+    # Make netgroup support optional (musl does not have it)
+    # Upstream MR: https://gitlab.freedesktop.org/polkit/polkit/merge_requests/10
+    # We use the version of the patch that Alpine uses successfully.
+    (fetchpatch {
+      name = "make-innetgr-optional.patch";
+      url = "https://git.alpinelinux.org/aports/plain/main/polkit/make-innetgr-optional.patch?id=391e7de6ced1a96c2dac812e0b12f1d7e0ea705e";
+      sha256 = "1p9qqqhnrfyjvvd50qh6vpl256kyfblm1qnhz5pm09klrl1bh1n4";
+    })
   ];
 
   postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
@@ -41,7 +54,7 @@ stdenv.mkDerivation rec {
     ++ [ libxslt docbook_xsl docbook_xml_dtd_412 ]; # man pages
   buildInputs =
     [ expat pam spidermonkey_60 ]
-    ++ stdenv.lib.optional useSystemd systemd
+    ++ (if useSystemd then [systemd] else [elogind])
     ++ stdenv.lib.optional withGnome gobject-introspection;
 
   propagatedBuildInputs = [

pkgs/top-level/all-packages.nix

@@ -1599,6 +1599,8 @@ in
 
   elm-github-install = callPackage ../tools/package-management/elm-github-install { };
 
+  elogind = callPackage ../applications/misc/elogind { };
+
   enca = callPackage ../tools/text/enca { };
 
   ent = callPackage ../tools/misc/ent { };