Consolidate conf-compile steps for skarnet.org pkgs.

pkgs/development/tools/build-managers/skarnet/default.nix

@@ -0,0 +1,21 @@
+{ stdenv }:
+
+let
+
+  version = "2014-11-28";
+
+in stdenv.mkDerivation {
+
+  name = "skarnet-conf-compile-${version}";
+
+  phases = [ "fixupPhase" ];
+
+  setupHook = ./setup-hook.sh;
+
+  meta = {
+    homepage = http://www.skarnet.org/software/conf-compile.html;
+    description = "Support for configuring skarnet.org packages for nix builds";
+    platforms = stdenv.lib.platforms.all;
+  };
+
+}

pkgs/development/tools/build-managers/skarnet/setup-hook.sh

@@ -0,0 +1,42 @@
+# Packages from skarnet.org use a unique build system. These functions
+# assist with some common configuration and shebang patching.
+
+skarnetConfigure() {
+  runHook preConfigure
+
+  pushd conf-compile >/dev/null
+
+  # paths
+  > conf-defaultpath         printf "$out/bin"
+  > conf-etc                 printf "$out/etc"
+  > conf-install-command     printf "$out/bin"
+  > conf-install-include     printf "$out/include"
+  > conf-install-libexec     printf "$out/libexec"
+  > conf-install-library     printf "$out/lib"
+  > conf-install-library.so  printf "$out/lib"
+  > conf-install-sysdeps     printf "$out/sysdeps"
+
+  # let nix builder strip things, cross-platform
+  truncate --size 0 conf-stripbins conf-striplibs
+
+  rm -f flag-slashpackage
+  touch flag-allstatic
+  touch flag-forcedevr          # only used for skalibs
+
+  # build inputs
+  truncate --size 0 import path-include path-library
+  for input in $nativeBuildInputs; do
+    [[ -a "$input/sysdeps" ]] && >> import       printf "$input/sysdeps"
+    [[ -a "$input/include" ]] && >> path-include printf "$input/include"
+    [[ -a "$input/lib" ]]     && >> path-library printf "$input/lib"
+  done
+
+  popd >/dev/null
+
+  # patch various scripts to use stdenv shell
+  patchShebangs src/sys
+
+  runHook postConfigure
+}
+
+export configurePhase=skarnetConfigure