add anoia.net.constants for SOCK_{STREAM,DGRAM} etc

we use an ugly bit of C preprocessor to get the values from
header files, because certain constants are different on MIPS
than on other architectures

pkgs/anoia/Makefile

@@ -1,10 +1,14 @@
 
-default: fs.lua init.lua nl.lua svc.lua
+default: fs.lua init.lua nl.lua svc.lua net/constants.lua
 
 test:
 	ln -s . anoia
 	fennel test.fnl
 	fennel test-svc.fnl
 
+net/constants.lua: net/constants.c
+	$(CC) -imacros sys/socket.h -imacros linux/netlink.h -E -P - < net/constants.c  | sed 's/ *$$//g' | cat -s > net/constants.lua
+
+
 %.lua: %.fnl
 	fennel --compile $< > $@

pkgs/anoia/default.nix

@@ -4,13 +4,14 @@
 , linotify
 , lua
 , lualinux
+, cpio
 }:
 let pname =  "anoia";
 in stdenv.mkDerivation {
   inherit pname;
   version = "0.1";
   src = ./.;
-  nativeBuildInputs = [ fennel ];
+  nativeBuildInputs = [ fennel cpio ];
   buildInputs = with lua.pkgs; [ linotify lualinux ];
   outputs = [ "out" "dev" ];
 
@@ -18,7 +19,7 @@ in stdenv.mkDerivation {
 
   installPhase = ''
     mkdir -p "$out/share/lua/${lua.luaversion}/${pname}"
-    cp *.lua "$out/share/lua/${lua.luaversion}/${pname}"
+    find . -name \*.lua | cpio -p -d "$out/share/lua/${lua.luaversion}/${pname}"
 
     mkdir -p "$dev/share/lua/${lua.luaversion}/${pname}"
     cp assert.fnl "$dev/share/lua/${lua.luaversion}/${pname}"

pkgs/anoia/net/constants.c

@@ -0,0 +1,11 @@
+
+#define MACRO(c) [#c] = c,
+
+return {
+    MACRO(SOCK_STREAM)
+    MACRO(SOCK_DGRAM)
+    MACRO(SOCK_RAW)
+    MACRO(AF_LOCAL)
+    MACRO(AF_NETLINK)
+    MACRO(NETLINK_KOBJECT_UEVENT)
+}