engine: add an empty “*daemon” builtin basepak, delete the daemon dpkdir

Author: illwieckz

azure-pipelines.yml

@@ -61,7 +61,7 @@ jobs:
       displayName: 'Build'
     - bash: |
         set -e
-        build/test-ttyclient -pakpath pkg -set fs_basepak daemon -set vm.cgame.type 3
+        build/test-ttyclient -pakpath pkg -set fs_basepak '*daemon' -set vm.cgame.type 3
       displayName: 'Test'
 
   - job: Linux
@@ -130,6 +130,6 @@ jobs:
       displayName: 'Build'
     - bash: |
         set -e
-        SDL_VIDEODRIVER=offscreen ALSOFT_DRIVERS=null build/test-client -pakpath pkg -set fs_basepak daemon -set vm.cgame.type 3
+        SDL_VIDEODRIVER=offscreen ALSOFT_DRIVERS=null build/test-client -pakpath pkg -set fs_basepak '*daemon' -set vm.cgame.type 3
       condition: "and(succeeded(), eq(variables.TOOLCHAIN_FILE, ''))"
       displayName: 'Test'

src/engine/qcommon/files.cpp

@@ -657,8 +657,16 @@ bool FS_LoadPak(const Str::StringRef name)
 	}
 }
 
+/* Empty base pak available on all engines.
+It makes possible to run the engine without a game,
+this way:
+./daemon -set fs_basepak '*daemon' */
+FS::builtinFileMap_t engineBasePak = {};
+
 void FS_LoadBasePak()
 {
+	FS::AddBuiltinPak("daemon", ENGINE_VERSION, engineBasePak);
+
 	Cmd::Args extrapaks(fs_extrapaks.Get());
 	for (auto& x: extrapaks) {
 		if (!FS_LoadPak(x)) {