{pkgs => lib}.genid

14 files changed, 64 insertions, 68 deletions

diff --git a/krebs/3modules/Reaktor.nix b/krebs/3modules/Reaktor.nix
index 1ec49b81..0fca5220 100644
--- a/krebs/3modules/Reaktor.nix
+++ b/krebs/3modules/Reaktor.nix
@@ -1,19 +1,8 @@
-{ config, pkgs,lib, ... }:
-
+{ config, lib, pkgs, ... }:
 
+with lib;
 let
 
-  inherit (lib)
-    mkIf
-    mkOption
-    types
-    singleton
-    isString
-    optionalString
-    concatStrings
-    escapeShellArg
-  ;
-
   ReaktorConfig = pkgs.writeText "config.py" ''
       ${if (isString cfg.overrideConfig ) then ''
       # Overriden Config
@@ -86,10 +75,9 @@ let
 
   imp = {
     # for reaktor get-config
-    users.extraUsers = singleton {
+    users.extraUsers = singleton rec {
       name = "Reaktor";
-      # uid = config.ids.uids.Reaktor;
-      uid = 2066439104; #genid Reaktor
+      uid = genid name;
       description = "Reaktor user";
       home = "/var/lib/Reaktor";
       createHome = true;
diff --git a/krebs/3modules/apt-cacher-ng.nix b/krebs/3modules/apt-cacher-ng.nix
index 75296baf..371d39b6 100644
--- a/krebs/3modules/apt-cacher-ng.nix
+++ b/krebs/3modules/apt-cacher-ng.nix
@@ -119,16 +119,14 @@ let
   imp = {
 
     users.extraUsers.acng = {
-    # uid = config.ids.uids.acng;
-      uid = 897955083; #genid Reaktor
+      uid = genid "acng";
       description = "apt-cacher-ng";
       home = acng-home;
       createHome = false;
     };
 
     users.extraGroups.acng = {
-      gid = 897955083; #genid Reaktor
-    # gid = config.ids.gids.Reaktor;
+      gid = genid "acng";
     };
 
     systemd.services.apt-cacher-ng = {
diff --git a/krebs/3modules/bepasty-server.nix b/krebs/3modules/bepasty-server.nix
index c99c3d11..e7484120 100644
--- a/krebs/3modules/bepasty-server.nix
+++ b/krebs/3modules/bepasty-server.nix
@@ -130,12 +130,12 @@ let
     ) cfg.servers;
 
     users.extraUsers.bepasty = {
-      uid = 2796546855; #genid bepasty
+      uid = genid "bepasty";
       group = "bepasty";
       home = "/var/lib/bepasty-server";
     };
     users.extraGroups.bepasty = {
-      gid = 2796546855; #genid bepasty
+      gid = genid "bepasty";
     };
   };
 
diff --git a/krebs/3modules/fetchWallpaper.nix b/krebs/3modules/fetchWallpaper.nix
index 83ecf417..f320c750 100644
--- a/krebs/3modules/fetchWallpaper.nix
+++ b/krebs/3modules/fetchWallpaper.nix
@@ -51,7 +51,7 @@ let
   imp = {
     users.users.fetchWallpaper = {
       name = "fetchWallpaper";
-      uid = 3332383611; #genid fetchWallpaper
+      uid = genid "fetchWallpaper";
       description = "fetchWallpaper user";
       home = cfg.stateDir;
       createHome = true;
diff --git a/krebs/3modules/git.nix b/krebs/3modules/git.nix
index 23412949..e6267d7e 100644
--- a/krebs/3modules/git.nix
+++ b/krebs/3modules/git.nix
@@ -145,14 +145,14 @@ let
         ]) (filter (x: hasAttr "allow-receive-ref" x.perm) cfg.rules));
       };
     
-    users.extraUsers = singleton {
+    users.extraUsers = singleton rec {
       description = "Git repository hosting user";
       name = "git";
       shell = "/bin/sh";
       openssh.authorizedKeys.keys =
         mapAttrsToList (_: makeAuthorizedKey git-ssh-command)
           config.krebs.users;
-      uid = 129318403; # genid git
+      uid = genid name;
     };
   };
 
@@ -238,9 +238,9 @@ let
     };
   };
 
-  fcgitwrap-user = {
+  fcgitwrap-user = rec {
     name = "fcgiwrap";
-    uid = 2867890860; # genid fcgiwrap
+    uid = genid name;
     group = "fcgiwrap";
   };
 
diff --git a/krebs/3modules/github-hosts-sync.nix b/krebs/3modules/github-hosts-sync.nix
index 5503ee8d..2aa18d53 100644
--- a/krebs/3modules/github-hosts-sync.nix
+++ b/krebs/3modules/github-hosts-sync.nix
@@ -56,9 +56,9 @@ let
     };
   };
 
-  user = {
+  user = rec {
     name = "github-hosts-sync";
-    uid = 3220554646; # genid github-hosts-sync
+    uid = genid name;
   };
 
   # TODO move to lib?
diff --git a/krebs/3modules/go.nix b/krebs/3modules/go.nix
index 793d1f60..08a93dab 100644
--- a/krebs/3modules/go.nix
+++ b/krebs/3modules/go.nix
@@ -1,6 +1,5 @@
 { config, lib, pkgs, ... }:
 
-with builtins;
 with lib;
 
 let
@@ -31,9 +30,9 @@ let
       bind = mkDefault "127.0.0.1";
     };
 
-    users.extraUsers.go = {
+    users.extraUsers.go = rec {
       name = "go";
-      uid = 42774411; #genid go
+      uid = genid name;
       description = "go url shortener user";
       home = "/var/lib/go";
       createHome = true;
diff --git a/krebs/3modules/realwallpaper.nix b/krebs/3modules/realwallpaper.nix
index 7e02538f..b377368f 100644
--- a/krebs/3modules/realwallpaper.nix
+++ b/krebs/3modules/realwallpaper.nix
@@ -1,13 +1,7 @@
 arg@{ config, lib, pkgs, ... }:
 
+with lib;
 let
-  inherit (lib)
-    mkEnableOption
-    mkOption
-    types
-    mkIf
-  ;
-
   cfg = config.krebs.realwallpaper;
 
   out = {
@@ -89,7 +83,7 @@ let
     };
 
     users.extraUsers.realwallpaper = {
-      uid = 2009435407; #genid realwallpaper
+      uid = genid "realwallpaper";
       home = cfg.workingDir;
       createHome = true;
     };
diff --git a/krebs/3modules/retiolum.nix b/krebs/3modules/retiolum.nix
index 28ac6730..e0e2692a 100644
--- a/krebs/3modules/retiolum.nix
+++ b/krebs/3modules/retiolum.nix
@@ -133,9 +133,9 @@ let
     };
   };
 
-  user = {
+  user = rec {
     name = "retiolum";
-    uid = 301281149; # genid retiolum
+    uid = genid name;
   };
 
   tinc = cfg.tincPackage;
diff --git a/krebs/3modules/tinc_graphs.nix b/krebs/3modules/tinc_graphs.nix
index ba81dd41..1f32c2e5 100644
--- a/krebs/3modules/tinc_graphs.nix
+++ b/krebs/3modules/tinc_graphs.nix
@@ -120,7 +120,7 @@ let
     };
 
     users.extraUsers.tinc_graphs = {
-      uid = 3925439960; #genid tinc_graphs
+      uid = genid "tinc_graphs";
       home = "/var/spool/tinc_graphs";
     };
 
diff --git a/krebs/3modules/urlwatch.nix b/krebs/3modules/urlwatch.nix
index 206bc569..31cbfcf6 100644
--- a/krebs/3modules/urlwatch.nix
+++ b/krebs/3modules/urlwatch.nix
@@ -5,7 +5,6 @@
 # cache = url: "${cfg.dataDir}/.urlwatch/cache/${hashString "sha1" url}"
 # TODO hooks.py
 
-with builtins;
 with lib;
 let
   cfg = config.krebs.urlwatch;
@@ -136,9 +135,9 @@ let
     };
   };
 
-  user = {
+  user = rec {
     name = "urlwatch";
-    uid = 3467631196; # genid urlwatch
+    uid = genid name;
   };
 in
 out
diff --git a/krebs/4lib/default.nix b/krebs/4lib/default.nix
index 1cabeae2..dfc51bbe 100644
--- a/krebs/4lib/default.nix
+++ b/krebs/4lib/default.nix
@@ -7,6 +7,8 @@ let out = rec {
 
   eq = x: y: x == y;
 
+  mod = x: y: x - y * (x / y);
+
   addName = name: set:
     set // { inherit name; };
 
@@ -17,6 +19,7 @@ let out = rec {
   dir.has-default-nix = path: pathExists (path + "/default.nix");
 
   dns = import ./dns.nix { inherit lib; };
+  genid = import ./genid.nix { lib = lib // out; };
   git = import ./git.nix { lib = lib // out; };
   listset = import ./listset.nix { inherit lib; };
   shell = import ./shell.nix { inherit lib; };
diff --git a/krebs/4lib/genid.nix b/krebs/4lib/genid.nix
new file mode 100644
index 00000000..0aed1d35
--- /dev/null
+++ b/krebs/4lib/genid.nix
@@ -0,0 +1,37 @@
+{ lib, ... }:
+with lib;
+with builtins;
+let out = genid;
+
+  # id = genid s = (hash s + min) % max
+  # min <= genid s < max
+  #
+  # min = 2^24 =   16777216 = 0x001000000
+  # max = 2^32 = 4294967296 = 0x100000000
+  #
+  # id is bigger than UID of nobody and GID of nogroup
+  # see <nixos/modules/misc/ids.nix> and some spare for stuff like lxd.
+  #
+  # :: str -> uint32
+  genid = s: sum16 (addmod16_16777216 (hash s));
+
+  # :: str -> list8 uint4
+  hash = s:
+    map hexint (stringToCharacters (substring 32 8 (hashString "sha1" s)));
+
+  # :: list uint -> uint
+  sum16 = foldl (a: i: a * 16 + i) 0;
+
+  # :: list8 uint4 -> list1 uint8 ++ list6 uint4
+  addmod16_16777216 = x: let
+    a = 16 * head x + head (tail x);
+    d = tail (tail x);
+  in [(mod (a + 1) 256)] ++ d;
+
+  # :: char -> uint4
+  hexint = x: hexvals.${toLower x};
+
+  # :: attrset char uint4
+  hexvals = listToAttrs (imap (i: c: { name = c; value = i - 1; })
+                        (stringToCharacters "0123456789abcdef"));
+in out
diff --git a/krebs/5pkgs/genid/default.nix b/krebs/5pkgs/genid/default.nix
deleted file mode 100644
index c75bec31..00000000
--- a/krebs/5pkgs/genid/default.nix
+++ /dev/null
@@ -1,22 +0,0 @@
-{ lib, pkgs, ... }:
-
-pkgs.writeScriptBin "genid" ''
-  #! /bin/sh
-  # usage: genid NAME
-  set -euf
-
-  export PATH=${lib.makeSearchPath "bin" (with pkgs; [
-    bc
-    coreutils
-  ])}
-
-  name=$1
-  hash=$(printf %s "$name" | sha1sum | cut -d\  -f1 | tr a-f A-F)
-  echo "
-    min=2^24  # bigger than nobody and nogroup, see <nixos/modules/misc/ids.nix>
-              # and some spare for stuff like lxd.
-    max=2^32  # see 2^(8*sizeof(uid_t))
-    ibase=16
-    ($hash + min) % max
-  " | bc
-''