Revert "remove luaposix ref in write-fennel"

This reverts commit a60c2539a6.

modules/ppp/common.nix

@@ -78,6 +78,6 @@ let
     inherit dependencies;
   };
 in svc.secrets.subscriber.build {
-  watch = [ username password ];
+  watch = lib.filter (n: typeOf n=="lambda") [ username password ];
   inherit service;
 }

modules/ppp/default.nix

@@ -25,6 +25,7 @@ let
       inherit description;
     };
 in {
+  imports = [ ../secrets ];
   options = {
     system.service.pppoe = mkOption {
       type = liminix.lib.types.serviceDefn;

modules/secrets/subscriber.nix

@@ -5,7 +5,7 @@
 let
   inherit (liminix.services) oneshot longrun;
   inherit (builtins) length head toString;
-  inherit (lib) unique optional;
+  inherit (lib) unique optional optionals;
   inherit (service) name;
 
   watched-services = unique (map (f: f "service") watch);
@@ -46,6 +46,6 @@ in service.overrideAttrs(o: {
   buildInputs =  (lim.orEmpty o.buildInputs) ++
                  optional (watched-service != null) watcher;
   dependencies = (lim.orEmpty o.dependencies) ++
-                 optional (watched-service != null)  watcher ++
-                 optional (watched-service != null)  watched-service;
+                 optionals (watched-service != null)
+                   [ watcher watched-service ];
 })

pkgs/write-fennel/default.nix

@@ -31,6 +31,7 @@ stdenv.mkDerivation {
      echo "#!${lua}/bin/lua ${luaFlags}"
      echo "package.path = ${lib.strings.escapeShellArg (concatStringsSep "" luapath)} .. package.path"
      echo "package.cpath = ${lib.strings.escapeShellArg (concatStringsSep "" luacpath)} .. package.cpath"
+     echo "local ok, stdlib = pcall(require,'posix.stdlib'); if ok then stdlib.setenv('PATH',${lib.escapeShellArg (lib.makeBinPath packages)} .. \":\" .. os.getenv('PATH')) end"
      echo "local ok, ll = pcall(require,'lualinux'); if ok then ll.setenv('PATH',${lib.escapeShellArg (lib.makeBinPath packages)} .. \":\" .. os.getenv('PATH')) end"
      fennel ${if macropath != "" then "--add-macro-path ${lib.strings.escapeShellArg macropath}" else ""}  ${if correlate then "--correlate" else ""} --compile ${source} 
     ) >  ${name}.lua