convert anoia.fs to use lualinux instead of lfs

this is just to make testing with socat easier

THOUGHTS.txt

@@ -4722,11 +4722,15 @@ I think we could make the event loop abstraction leak less?
 It's not actually a _loop_, all the actual GOTO 10 happens
 outside of it
 
-1) see if we can do netlink in lualinux
+[X] 1) see if we can do netlink in lualinux
-2) if so, convert it to lualinux
+[X] 2) if so, convert it to lualinux
-3) add netlink socket to event loop
+[X] 3) add netlink socket to event loop
-4) make it send messages to subscribers
+[X] 4) make it send messages to subscribers
 5) package it
-6) make inout test use it instead of uevent-watcher
+6) make uevent-watcher use it instead of netlink directly
 7) write an inout test variant that has the stick inserted
   at boot time already
+
+I'm also thinking we could wrap the raw fds from lualinux into small
+objects with read and close methods? It would make testing easier if
+nothing else - also use of with-open.  Maybe do that in anoia.

pkgs/anoia/default.nix

@@ -2,6 +2,7 @@
   fennel
 , stdenv
 , lua
+, lualinux
 }:
 let pname =  "anoia";
 in stdenv.mkDerivation {
@@ -9,7 +10,7 @@ in stdenv.mkDerivation {
   version = "0.1";
   src = ./.;
   nativeBuildInputs = [ fennel ];
-  buildInputs = with lua.pkgs; [ luafilesystem ];
+  buildInputs = with lua.pkgs; [ luafilesystem lualinux ];
   outputs = [ "out" "dev" ];
 
   doCheck = true;

pkgs/anoia/fs.fnl

@@ -1,7 +1,19 @@
-(local lfs (require :lfs))
+(local ll (require :lualinux))
+
+(local S_IFMT   0xf000)
+(local S_IFSOCK 0xc000)
+(local S_IFLNK  0xa000)
+(local S_IFREG  0x8000)
+(local S_IFBLK  0x6000)
+(local S_IFDIR  0x4000)
+(local S_IFCHR  0x2000)
+(local S_IFIFO  0x1000)
+
+(fn ifmt-bits [mode] (and mode (band mode 0xf000)))
 
 (fn directory? [pathname]
-  (= (lfs.symlinkattributes pathname :mode) "directory"))
+  (let [(mode size mtime) (ll.lstat3 pathname)]
+    (= (ifmt-bits mode) S_IFDIR)))
 
 (fn mktree [pathname]
   (if (or (= pathname "") (= pathname "/"))
@@ -10,28 +22,28 @@
   (or (directory? pathname)
       (let [parent (string.gsub pathname "/[^/]+/?$" "")]
         (or (directory? parent) (mktree parent))
-        (assert (lfs.mkdir pathname)))))
+        (assert (ll.mkdir pathname)))))
 
 (fn rmtree [pathname]
-  (case (lfs.symlinkattributes pathname)
+  (case (ifmt-bits (ll.lstat3 pathname))
     nil true
-    {:mode "directory"}
+    S_IFDIR
     (do
       (each [f (lfs.dir pathname)]
         (when (not (or (= f ".") (= f "..")))
           (rmtree ( .. pathname "/" f)))
         (lfs.rmdir pathname)))
-    {:mode "file"}
+    S_IFREG
     (os.remove pathname)
-    {:mode "link"}
+    S_IFLNK
     (os.remove pathname)
     unknown
-    (error (.. "can't remove " pathname " of kind \"" unknown.mode "\""))))
+    (error (.. "can't remove " pathname " of mode \"" unknown "\""))))
 
 
 {
  : mktree
  : rmtree
  : directory?
- :symlink (fn [from to] (lfs.link from to true))
+ :symlink (fn [from to] (ll.symlink from to))
  }

pkgs/devout/devout.fnl

@@ -82,11 +82,11 @@
   (collect [_ v (ipairs pollfds)]
     (let [fd (band (rshift v 32) 0xffffffff)
           revent (band v 0xffff)]
-      (values fd revent))))
+      (values fd (if (> revent 0) revent nil)))))
 
 (fn parse-terms [str]
   (print :terms str)
-  (collect [n (string.gmatch str "([^ ]+)")]
+  (collect [n (string.gmatch (str:gsub "\n+$" "") "([^ ]+)")]
     (string.match n "(.-)=(.+)")))
 
 (fn handle-client [db client]
@@ -138,7 +138,7 @@
           true)))
     (loop:register
      nl
-     #(do (print :netlink (ll.read nl)) true))
+     #(do (db:add (ll.read nl)) true))
     (while true
       (let [pollfds (pollfds-for (loop:fds))]
         (ll.poll pollfds 5000)

pkgs/devout/test.fnl

@@ -1,6 +1,6 @@
 (local { : database : event-loop } (require :devout))
 (local { : view } (require :fennel))
-(local sock (require :minisock))
+(local ll (require :lualinux))
 (import-macros { : expect : expect= } :anoia.assert)
 
 (var failed false)
@@ -166,9 +166,7 @@ MINOR=17")
    ))
 
 (fn new-fd []
-  (let [fd (sock.bind (.. "\1\0"  "/tmp/test-socket"  "\0\0\0\0\0"))]
+  (ll.open "/dev/zero" 0 0x1ff))
-    (os.remove "/tmp/test-socket")
-    fd))
 
 (example
  "when the callback returns false it is unregistered and the fd is closed"

pkgs/fennelrepl/default.nix

@@ -5,6 +5,7 @@
 , lib
 , luaPackages
 , lua
+, lualinux
 , writeScriptBin
 , linotify
 , anoia
@@ -15,7 +16,9 @@ let packages = [
       linotify
       anoia
       fennel
+      lualinux
       netlink-lua
+      lua.pkgs.readline
       lua.pkgs.luafilesystem
     ];
     join = ps: builtins.concatStringsSep ";" ps;

pkgs/lualinux/default.nix

@@ -12,7 +12,10 @@ in lua.pkgs.buildLuaPackage {
   version = "0.1";              # :shrug:
 
   inherit src;
-  makeFlags = [ "LUADIR=."  "lualinux.so" ];
+  postPatch = ''
+    sed -i -e '/strip/d' Makefile
+  '';
+  makeFlags = [ "LUADIR=." "CC:=$(CC)" "STRIP=true"  "lualinux.so"  ];
 
   installPhase = ''
     mkdir -p "$out/lib/lua/${lua.luaversion}"

pkgs/odhcp-script/default.nix

@@ -2,5 +2,6 @@
   writeFennelScript
 , anoia
 , lua
+, lualinux
 }:
-writeFennelScript  "odhcpc-script" [anoia lua.pkgs.luafilesystem] ./odhcp6-script.fnl
+writeFennelScript  "odhcpc-script" [anoia lualinux] ./odhcp6-script.fnl

pkgs/uevent-watch/default.nix

@@ -1,6 +1,7 @@
 {
   lua
 , nellie
+, lualinux
 , writeFennel
 , runCommand
 , anoia
@@ -15,7 +16,7 @@ stdenv.mkDerivation {
   installPhase = ''
     mkdir -p $out/bin
     cp -p ${writeFennel "uevent-watch" {
-      packages = [fennel anoia nellie lua.pkgs.luafilesystem];
+      packages = [fennel anoia nellie lualinux];
       mainFunction = "run";
     } ./watch.fnl} $out/bin/uevent-watch
   '';