big refactor on how games are built

.gitignore

@@ -1,2 +1,3 @@
 /nixos.qcow2
-/emulationstation-source
+result
+result-*

games.nix

@@ -1,25 +1,13 @@
-{
-  retronix.emulationstation = {
+{pkgs, ...}: {
+  retronix = {
     systems = {
       "Arcade" = {
-      command = "bash -c 'echo $XINIT'";
-      games = [
-        {
-          src = ./emulationstation/roms/Arcade/atetris.zip;
-          filename = "atetris.zip";
-          name = "Tetris";
-          desc = "Tetris, le classique des jeux de puzzle que tout le monde connait (et auquel tout le monde joue quand on met les affaires dans le coffre en partant en vacances). Tetris est devenu un phénomène mondial lorsqu'il a été vendu en pack avec l'achat de la Gameboy originale, en 1989.  L'OST est célèbre, avec ses origines classiques russes qui sont maintenant célèbres. ";
-          rating = "0.9";
-          releasedate = "19880101T000000";
-          developer = "bootleg";
-          publisher = "Atari";
-          genre = "Puzzle-Game";
-          players = "1-2";
-        }
+        extension = ".sh";
+        games = with pkgs.roms; [
+          atetris
         ];
       };
-
     };
-  inputCfg = builtins.readFile ./es_input.cfg;
-};
+    emulationstation.inputCfg = builtins.readFile ./es_input.cfg;
+  };
 }

launch_es.sh

@@ -0,0 +1,5 @@
+export NIXPKGS_ALLOW_UNFREE=1
+
+RESULT=$(nix-build -E 'import ((import ./npins).nixpkgs + "/nixos")'  -A config.retronix.emulationstation.cli -I nixos-config=configuration.nix --no-out-link $@)
+
+$RESULT

launch_vm.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
-RESULT=$(nix-build -E 'import ((import ./npins).nixpkgs + "/nixos")'  -A config.system.build.vm -I nixos-config=configuration.nix --no-out-link --option substituters "" $@)
+export NIXPKGS_ALLOW_UNFREE=1
+
+RESULT=$(nix-build -E 'import ((import ./npins).nixpkgs + "/nixos")'  -A config.system.build.vm -I nixos-config=configuration.nix --no-out-link $@)
 
 $RESULT/bin/run-nixos-vm

modules/es-config.nix

@@ -6,22 +6,29 @@ let
 
   attrToXml = attrs: lib.concatLines (lib.mapAttrsToList (k: v: "<${k}>${builtins.toString v}</${k}>") attrs);
 
-  gameTemplate = args: let
+  gameTemplate = game: let
     attr = [
       "path"
       "name"
+      "sortname"
       "desc"
       "image"
-      "thumbnail"
       "video"
+      "marquee"
+      "thumbnail"
       "rating"
       "releasedate"
       "developer"
       "publisher"
       "genre"
       "players"
-      "sortname"
+      "favorite"
+      "hidden"
+      "kidgame"
+      "playcount"
+      "lastplayed"
     ];
+    args = game.meta // { path = "@out@/${game.name}.sh"; };
   in ''
     <game>
     ${attrToXml (filterAttrs' attr args)}
@@ -52,7 +59,7 @@ let
       </gameList>
     '';
     symlinkCommands = builtins.map (
-      v: "ln -s ${v.src} $out/${v.filename}"
+      v: "ln -s ${v}/${v.launchPath} $out/${v.name}.sh"
     ) games;
     
   in pkgs.runCommand "${name}-roms" {
@@ -63,7 +70,7 @@ let
   } ''
     mkdir -p $out
     cp $gamelistPath $out/gamelist.xml
-    substituteInPlace $out/gamelist.xml --subst-var out
+    substituteAllInPlace $out/gamelist.xml
 
     ${lib.concatLines symlinkCommands}
   '';
@@ -79,19 +86,18 @@ let
         type = lib.types.str;
         default = name;
       };
-      path = lib.mkOption { # TODO: check it works
+      path = lib.mkOption {
         type = lib.types.path;
       };
       command = lib.mkOption {
         type = lib.types.str;
-        default = "echo \"Hello world !\"";
+        default = "%ROM%";
       };
       extension = lib.mkOption {
         type = lib.types.str;
-        default = ".zip";
       };
       games = lib.mkOption {
-        type = lib.types.listOf gameOptions;
+        type = lib.types.listOf lib.types.package;
         description = "Takes attributes of `games` tag in gamelist.xml";
       };
     };
@@ -99,47 +105,16 @@ let
       path = mkSystemPath config.name config.games;
     };
   });
-
-  gameOptions = lib.types.submodule ({config, name, ... }: {
-    freeformType = with lib.types; attrsOf str;
-    options = {
-      src = lib.mkOption {
-        type = lib.types.path;
-      };
-      name = lib.mkOption {
-        type = lib.types.str;
-      };
-      desc = lib.mkOption {
-        type = lib.types.str;
-        default = "";
-      };
-      path = lib.mkOption {
-        type = lib.types.str;
-        default = "@out@/${config.filename}";
-      };
-      filename = lib.mkOption {
-        type = lib.types.str;
-      };
-    };
-  });
 in {
   options = {
-    retronix.emulationstation = {
-      systems = lib.mkOption {
-        type = lib.types.attrsOf (sectionOptions);
-        default = {};
-      };
+    retronix = {
+      emulationstation = {
         systemCfgFile = lib.mkOption {
           type = lib.types.path;
         };
         inputCfgFile = lib.mkOption {
           type = lib.types.path;
         };
-      systemsDir = lib.mkOption {
-        internal = true;
-        type = lib.types.path;
-        description = "Directory containing the symlinks to roms and gamelists.xml files";
-      };
         themesDir = lib.mkOption {
           type =  lib.types.path;
         };
@@ -157,32 +132,37 @@ in {
           description = ''
             Must be store paths.
             Directory structure will be merged.
-          Must contain .emulationstation folder
           '';
         };
         cli = lib.mkOption {
-        type = lib.types.str;
+          type = lib.types.package;
+        };
+      };
+      systems = lib.mkOption {
+        type = lib.types.attrsOf (sectionOptions);
+        default = {};
       };
     };
   };
   config = {
 
     retronix.emulationstation = {
-      systemCfgFile = writeESDir "es_systems.cfg" ''
+      systemCfgFile = pkgs.writeTextDir "es_systems.cfg" ''
         <?xml version="1.0"?>
         <systemList>
-        ${lib.concatLines (lib.mapAttrsToList (_: systemTemplate) cfg.systems)}
+        ${lib.concatLines (lib.mapAttrsToList (_: systemTemplate) config.retronix.systems)}
         </systemList>
       '';
-      inputCfgFile = lib.mkDefault (writeTextDir "es_input.cfg" cfg.inputCfg);
-      homeDir = pkgs.symlinkJoinSubDir {
+      inputCfgFile = lib.mkDefault (pkgs.writeTextDir "es_input.cfg" cfg.inputCfg);
+      homeDir = pkgs.symlinkJoinSubdir {
         name = "es-config-dir";
+        subdir = ".emulationstation";
         paths = [
           cfg.systemCfgFile
           cfg.inputCfgFile
         ] ++ cfg.extraConfigFiles;
       };
-      cli = t "${pkgs.emulationstation}/bin/emulationstation --home ${cfg.homeDir}";
+      cli = pkgs.writeScript "emulationstation" "${pkgs.emulationstationPatched}/bin/emulationstation --home ${cfg.homeDir} --gamelist-only";
     };
   };
 

pkgs/overlay.nix

@@ -1,11 +1,15 @@
 final: prev: {
-  joy2keyd = final.python3.pkgs.callPackage ./joy2keyd {};
   retropieSetup = final.callPackage ./retropie-setup.nix {};
+
+  joy2keyd = final.python3.pkgs.callPackage ./joy2keyd {};
   joy2key = final.callPackage ./joy2key.nix {};
+
   runcommand = final.callPackage ./runcommand.nix {};
+
   emulationstationPatched = final.emulationstation.overrideAttrs (_: previous: {
     patches = [ ./emulationstation.patch ];
   });
+
   symlinkJoinSubdir =
     args_@{ name
          , paths
@@ -29,4 +33,6 @@ final: prev: {
         done
         ${postBuild}
       '';
+
+  roms = final.callPackage ./roms {};
 }

pkgs/roms/atetris.nix

@@ -0,0 +1,18 @@
+{mkRetroarchRom}:
+mkRetroarchRom {
+  name = "Tetris";
+  src = ./bin/atetris;
+
+  emulator = "mame";
+  filename = "atetris.zip";
+
+  meta = {
+    desc = "Tetris, le classique des jeux de puzzle que tout le monde connait (et auquel tout le monde joue quand on met les affaires dans le coffre en partant en vacances). Tetris est devenu un phénomène mondial lorsqu'il a été vendu en pack avec l'achat de la Gameboy originale, en 1989.  L'OST est célèbre, avec ses origines classiques russes qui sont maintenant célèbres. ";
+    rating = "0.9";
+    releasedate = "19880101T000000";
+    developer = "bootleg";
+    publisher = "Atari";
+    genre = "Puzzle-Game";
+    players = "1-2";
+  };
+}

pkgs/roms/build/mkRetroarchRom.nix

@@ -0,0 +1,19 @@
+{ mkRom , retroarchFull }:
+{ name
+, src
+, emulator
+, filename
+, settings ? {}
+, meta
+}:
+let
+  retroarch = retroarchFull.override (prev: {
+    settings = prev.settings // settings;
+  });
+in
+mkRom ({
+  runtimeInputs = [ retroarch ];
+  # To do add a check for the emulator
+  command = "retroarch -L ${emulator} ${builtins.placeholder "out"}/usr/share/${filename}";
+  inherit meta src name;
+})

pkgs/roms/build/mkRom.nix

@@ -0,0 +1,54 @@
+{ runCommand, runtimeShell, stdenv, shellcheck-minimal, lib, lndir }:
+{ name
+, src
+, runtimeInputs ? [ ]
+, command
+, meta ? {}
+}:
+runCommand name {
+  inherit meta src;
+  allowSubstitutes = true;
+  preferLocalBuild = false;
+
+  launchPath = "launch.sh";
+
+  script = ''
+    #!${runtimeShell}
+    set -o errexit
+    set -o nounset
+    set -o pipefail
+  '' + lib.optionalString (runtimeInputs != [ ]) ''
+
+    export PATH="${lib.makeBinPath runtimeInputs}:$PATH"
+  '' + ''
+
+    ${command}
+  '';
+
+  passAsFile = [ "script" ];
+
+  checkPhase = ''
+    runHook preCheck
+    ${stdenv.shellDryRun} "$target"
+    ${lib.getExe shellcheck-minimal} "$target"
+    runHook postCheck
+  '';
+
+} ''
+  target=$out/bin/${lib.escapeShellArg name}
+  rom_dir=$out/usr/share
+
+  mkdir -p "$(dirname "$target")"
+  mkdir -p "$rom_dir"
+
+  # symlink rom_dir
+  ${lndir}/bin/lndir $src $rom_dir
+
+  mv "$scriptPath" "$target"
+  chmod +x "$target"
+
+  # symlink the executable to help emulation station calls
+  ln -s $target $out/$launchPath
+
+  eval "$checkPhase"
+''

pkgs/roms/default.nix

@@ -0,0 +1,12 @@
+{ lib, newScope }:
+
+let
+  romsFun = self: let
+    inherit (self) callPackage;
+  in {
+    atetris = callPackage ./atetris.nix {};
+
+    mkRom = callPackage ./build/mkRom.nix {};
+    mkRetroarchRom = callPackage ./build/mkRetroarchRom.nix {};
+  };
+in lib.makeScope newScope romsFun