skawarePackages: factor out the common parts

Introduce a `skawarePackages.buildPackage` function that contains the
common setup, removing a lot of duplication.
In particular, we require that the build directory has to be empty
after the `fixupPhase`, to make sure every relevant file is moved to
the outputs.

A next step would be to deduplicate the `configureFlags` attributes
and only require a `skawareInputs` field.

pkgs/tools/networking/s6-networking/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, execline, fetchgit, s6, s6-dns, skalibs
+{ stdenv, skawarePackages
 
 # Whether to build the TLS/SSL tools and what library to use
 # acceptable values: "libressl", false
@@ -6,11 +6,9 @@
 , sslSupport ? "libressl" , libressl
 }:
 
+with skawarePackages;
 let
   inherit (stdenv) lib;
-
-  version = "2.3.0.3";
-
   sslSupportEnabled = sslSupport != false;
   sslLibs = {
     "libressl" = libressl;
@@ -19,25 +17,18 @@ let
 in
 assert sslSupportEnabled -> sslLibs ? ${sslSupport};
 
-stdenv.mkDerivation rec {
 
-  name = "s6-networking-${version}";
+buildPackage {
+  pname = "s6-networking";
+  version = "2.3.0.3";
+  sha256 = "06kv2l31ch0zw538bpivgnwymb056x5hpmqafglffgkbq3izp7wc";
 
-  src = fetchgit {
-    url = "git://git.skarnet.org/s6-networking";
-    rev = "refs/tags/v${version}";
-    sha256 = "06kv2l31ch0zw538bpivgnwymb056x5hpmqafglffgkbq3izp7wc";
-  };
+  description = "A suite of small networking utilities for Unix systems";
 
   outputs = [ "bin" "lib" "dev" "doc" "out" ];
 
-  dontDisableStatic = true;
-
-  enableParallelBuilding = true;
-
   # TODO: nsss support
   configureFlags = [
-    "--enable-absolute-paths"
     "--libdir=\${lib}/lib"
     "--libexecdir=\${lib}/libexec"
     "--dynlibdir=\${lib}/lib"
@@ -61,20 +52,16 @@ stdenv.mkDerivation rec {
        "--enable-ssl=${sslSupport}"
        "--with-include=${lib.getDev sslLibs.${sslSupport}}/include"
        "--with-lib=${lib.getLib sslLibs.${sslSupport}}/lib"
-     ])
-  ++ (lib.optional stdenv.isDarwin "--build=${stdenv.hostPlatform.system}");
+       "--with-dynlib=${lib.getLib sslLibs.${sslSupport}}/lib"
+     ]);
 
   postInstall = ''
-    mkdir -p $doc/share/doc/s6-networking/
+    # remove all s6 executables from build directory
+    rm $(find -name "s6-*" -type f -mindepth 1 -maxdepth 1 -executable)
+    rm minidentd
+    rm libs6net.* libstls.*
+
     mv doc $doc/share/doc/s6-networking/html
   '';
 
-  meta = {
-    homepage = http://www.skarnet.org/software/s6-networking/;
-    description = "A suite of small networking utilities for Unix systems";
-    platforms = lib.platforms.all;
-    license = lib.licenses.isc;
-    maintainers = with stdenv.lib.maintainers; [ pmahoney Profpatsch ];
-  };
-
 }