Add XDG support

Celeste.Mod.mm/Mod/Everest/Everest.Content.cs

@@ -192,7 +192,7 @@ public static class Content {
                 Celeste.Instance.Content = new EverestContentManager(Celeste.Instance.Content);
 
                 Directory.CreateDirectory(PathContentOrig = Path.Combine(PathGame, Celeste.Instance.Content.RootDirectory));
-                Directory.CreateDirectory(PathDUMP = Path.Combine(PathGame, "ModDUMP"));
+                Directory.CreateDirectory(PathDUMP = Path.Combine(PathEverest, "ModDUMP"));
 
                 if (_DumpAll)
                     DumpAll();
@@ -203,7 +203,7 @@ public static class Content {
                 Crawl(new AssemblyModContent(typeof(Everest).Assembly) {
                     Name = "Everest"
                 });
-                Crawl(new MapBinsInModsModContent(Path.Combine(PathGame, "Mods")));
+                Crawl(new MapBinsInModsModContent(Path.Combine(PathEverest, "Mods")));
             }
 
             /// <summary>

Celeste.Mod.mm/Mod/Everest/Everest.Loader.cs

@@ -37,7 +37,7 @@ public static class Loader {
             internal static int DelayedLock;
 
             internal static void LoadAuto() {
-                Directory.CreateDirectory(PathMods = Path.Combine(PathGame, "Mods"));
+                Directory.CreateDirectory(PathMods = Path.Combine(PathEverest, "Mods"));
                 Directory.CreateDirectory(PathCache = Path.Combine(PathMods, "Cache"));
 
                 PathBlacklist = Path.Combine(PathMods, "blacklist.txt");

Celeste.Mod.mm/Mod/Everest/Everest.cs

@@ -80,6 +80,14 @@ public static partial class Everest {
         /// The path to the Everest /ModSettings directory.
         /// </summary>
         public static string PathSettings { get; internal set; }
+        /// <summary>
+        /// Whether XDG paths should be used.
+        /// </summary>
+        public static bool XDGPaths { get; internal set; }
+        /// <summary>
+        /// Path to Everest base location. Defaults to the game directory.
+        /// </summary>
+        public static string PathEverest { get; internal set; }
 
         private static bool _SavingSettings;
 
@@ -146,7 +154,16 @@ public static partial class Everest {
             }
 
             PathGame = Path.GetDirectoryName(typeof(Celeste).Assembly.Location);
-            PathSettings = Path.Combine(PathGame, "ModSettings");
+            if (!File.Exists(Path.Combine(PathGame, "EverestXDGFlag"))) {
+                XDGPaths = false;
+                PathEverest = PathGame;
+            } else {
+                XDGPaths = true;
+                var dataDir = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+                Directory.CreateDirectory(PathEverest = Path.Combine(dataDir, "Everest"));
+                Directory.CreateDirectory(Path.Combine(dataDir, "Everest", "Mods")); // Make sure it exists before content gets initialized
+            }
+            PathSettings = Path.Combine(PathEverest, "ModSettings");
             Directory.CreateDirectory(PathSettings);
 
             // Before even initializing anything else, make sure to prepare any static flags.

default.nix

@@ -1,13 +1,6 @@
 { pkgs ? import <nixpkgs> {}, fetchNuGet ? pkgs.fetchNuGet, buildDotnetPackage ? pkgs.buildDotnetPackage }:
 
 let
-  HookedMethod = fetchNuGet {
-    baseName = "HookedMethod";
-    version = "0.3.3-beta";
-    sha256 = "5abc349e55d57777fed6fc5d65cda4cc97aa8cb1dc87927dea7d4182f3fa57df";
-    outputFiles = [ "*" ];
-  };
-
   Cecil = fetchNuGet {
     baseName = "Mono.Cecil";
     version = "0.10.0";
@@ -18,7 +11,7 @@ let
   ValueTuple = fetchNuGet {
     baseName = "System.ValueTuple";
     version = "4.4.0";
-    sha256 = "0442bk4nk7ncd37qn1p5nbz297093vfcz5p0xl97q1gvcb7fyfsf";
+    sha256 = "1wydfgszs00yxga57sam66vzv9fshk2pw7gim57saplsnkfliaif";
     outputFiles = ["*"];
   };
 
@@ -30,7 +23,7 @@ in buildDotnetPackage rec {
   src = ./.;
 
   xBuildFiles = [ "Celeste.Mod.mm/Celeste.Mod.mm.csproj" "MiniInstaller/MiniInstaller.csproj" ];
-  outputFiles = [ "Celeste.Mod.mm/bin/Release/*" /* vim syntax bug workaround */ "MiniInstaller/bin/Release/*" /* vim syntax bug workaround */ ];
+  outputFiles = [ "Celeste.Mod.mm/bin/Release/*" "MiniInstaller/bin/Release/*" ];
 
   patchPhase = ''
     # $(SolutionDir) does not work for some reason
@@ -40,8 +33,7 @@ in buildDotnetPackage rec {
 
   preBuild = ''
     # Fake nuget restore, not very elegant but it works.
-    mkdir -p  packages
-    ln -sn ${HookedMethod}/lib/dotnet/HookedMethod packages/HookedMethod.${HookedMethod.version}
+    mkdir -p packages
     ln -sn ${Cecil}/lib/dotnet/Mono.Cecil packages/Mono.Cecil.${Cecil.version}
     ln -sn ${ValueTuple}/lib/dotnet/System.ValueTuple packages/System.ValueTuple.${ValueTuple.version}
   '';