make x.r: init lancache

prepare deployment of lan party steam cache

makefu/1systems/x.nix

@@ -34,6 +34,7 @@ with import <stockholm/lib>;
       ../2configs/exim-retiolum.nix
       ../2configs/mail-client.nix
       ../2configs/printer.nix
+      ../2configs/task-client.nix
 
       # Virtualization
       ../2configs/virtualization.nix

makefu/2configs/lancache.nix

@@ -0,0 +1,79 @@
+{ pkgs, lib, config, ... }:
+with import <stockholm/lib>;
+let
+  # see https://github.com/zeropingheroes/lancache for full docs
+  cachedir = "/var/lancache/cache";
+  logdir = "/var/lancache/log";
+
+  lancache= pkgs.stdenv.mkDerivation rec {
+    name = "lancache-2017-06-26";
+    src = pkgs.fetchFromGitHub {
+      # origin: https://github.com/multiplay/lancache
+      # forked: https://github.com/zeropingheroes/lancache
+      repo = "lancache";
+      owner = "zeropingheroes";
+      rev = "143f7bb";
+      sha256 = "1ra4l7qz3k231j5wabr89s5hh80n1kk8vgd3dsh0xx5mdpjhvdl6";
+    };
+    phases = [ "unpackPhase" "installPhase" ];
+    # here we can chance to edit `includes/proxy-cache-paths.conf`
+    installPhase = ''
+      mkdir -p $out
+      cp -r * $out/
+      sed -i -e 's/^\(user\).*/\1 ${cfg.user} ${cfg.group};/' \
+             -e 's/^\(error_log\).*/\1 stderr;\ndaemon off;/' $out/nginx.conf
+    '';
+  };
+  cfg = {
+    group = "nginx-lancache";
+    user = "nginx-lancache";
+    stateDir = "/var/lancache";
+    package = pkgs.stdenv.lib.overrideDerivation pkgs.nginx (old:{
+      configureFlags = old.configureFlags ++ [
+        "--with-http_slice_module"
+        "--with-stream"
+        "--with-pcre"
+        ];
+    });
+  };
+in {
+  systemd.services.nginx-lancache = {
+      description = "Nginx lancache Server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      restartIfChanged = true;
+
+      preStart = ''
+				PATH_CACHE="/var/lancache/cache"
+				PATH_LOGS="/var/lancache/logs"
+				WWW_USER="${cfg.user}"
+				WWW_GROUP="${cfg.group}"
+
+				mkdir -p $PATH_CACHE
+				cd $PATH_CACHE
+				mkdir -p installers tmp
+				mkdir -p $PATH_LOGS
+
+				chown -R $WWW_USER:$WWW_USER $PATH_CACHE
+				chown -R $WWW_USER:$WWW_USER $PATH_LOGS
+        '';
+      serviceConfig = {
+        ExecStart = "${cfg.package}/bin/nginx -c ${lancache}/nginx.conf -p ${lancache}";
+        ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+        Restart = "always";
+        RestartSec = "10s";
+        StartLimitInterval = "1min";
+      };
+    };
+      users.extraUsers = (singleton
+    { name = cfg.user;
+      group = cfg.group;
+      uid = genid cfg.group;
+    });
+
+    users.extraGroups = (singleton
+      { name = "${cfg.group}";
+        gid = genid cfg.group;
+    });
+
+}