treewide: override several programs to conform to xdg dir spec

home/config/xdg/default.nix

@@ -1,6 +1,9 @@
 { config, ... }:
 {
-  imports = [ ./mimetypes.nix ];
+  imports = [
+    ./mimetypes.nix
+    ./directory-spec-overrides.nix
+  ];
   xdg = {
     enable = true;
     userDirs = {

home/config/xdg/directory-spec-overrides.nix

@@ -0,0 +1,63 @@
+{ config, pkgs, lib, ... }:
+{
+  nix.settings.use-xdg-base-directories = true;
+
+  home.sessionVariables = let
+    inherit (config.xdg) dataHome cacheHome configHome userDirs;
+  in {
+    TEXMFHOME = "${dataHome}/texmf";
+    TEXMFVAR = "${cacheHome}/texlive";
+    TEXMFCONFIG = "${configHome}/texlive";
+
+    PSQL_HISTORY = "${dataHome}/psql_history";
+    SQLITE_HISTORY= "${dataHome}/sqlite_history";
+    MYSQL_HISTFILE = "${dataHome}/mysql_history";
+    NODE_REPL_HISTORY = "${dataHome}/node_repl_history";
+    GDB_HISTFILE = "${dataHome}/gdb_history";
+    PYTHON_HISTORY = "${dataHome}/python_history";
+
+    GHCUP_USE_XDG_DIRS = "true";
+
+    ANDROID_USER_HOME = "${dataHome}/android";
+    AZURE_CONFIG_DIR = "${dataHome}/azure";
+    CARGO_HOME = "${dataHome}/cargo";
+    CUDA_CACHE_PATH = "${cacheHome}/nv";
+    DOCKER_CONFIG = "${configHome}/docker";
+    DOTNET_CLI_HOME = "${dataHome}/dotnet";
+    DOT_SAGE = "${configHome}/sagemath";
+    ELM_HOME = "${configHome}/";
+    GOPATH = "${dataHome}/go";
+    GRADLE_USER_HOME = "${dataHome}/gradle";
+    ICEAUTHORITY = "${cacheHome}/ICEauthority";
+    NIMBLE_DIR = "${dataHome}/nimble";
+    NLTK_DATA = "${dataHome}/nltk_data";
+    NRFUTIL_HOME = "${dataHome}/nrfutil";
+    NUGET_PACKAGES = "${cacheHome}/nuget-packages";
+    PARALLEL_HOME = "${configHome}/parallel";
+    PYENV_ROOT = "${dataHome}/pyenv";
+    RUSTUP_HOME = "${dataHome}/rustup";
+    STACK_ROOT = "${dataHome}/stack";
+    W3M_DIR = "${dataHome}/w3m";
+    WINEPREFIX = "${dataHome}/wine";
+
+    # TODO: these needs to be set before the user session has fully initialized
+    # XINITRC = "$XDG_CONFIG_HOME/x11/initrc";
+    # XAUTHORITY
+    # ERRFILE = "${cacheHome}/X11/xsession-errors";
+    # USERXSESSION
+    # XCOMPOSECACHE="${cacheHome}/X11/xcompose";
+    # XCURSOR_PATH
+  };
+
+  xdg.configFile = {
+    "npm/npmrc".text = ''
+      prefix=${config.xdg.dataHome}/npm
+      cache=${config.xdg.cacheHome}/npm
+      init-module=${config.xdg.configHome}/npm/config/npm-init.js
+    '';
+    "bpython/config".text = ''
+      [general]
+      hist_file = ${config.xdg.dataHome}/bpython_history
+    '';
+  };
+}

home/home.nix

@@ -48,29 +48,18 @@ in {
     ./services/copyq.nix
   ];
 
+  nix.settings = {
+    use-xdg-base-directories = true;
+  };
+
   home = {
     stateVersion = "22.05";
     username = "h7x4";
     homeDirectory = "/home/h7x4";
-    file = {
-      ".ghci".text = ''
-        :set prompt "${extendedLib.termColors.front.magenta "[GHCi]λ"} ".
-      '';
 
-      ".pyrc".text = ''
+    sessionPath = [
-        #!/usr/bin/env python3
+      "$HOME/.local/bin"
-        import sys
+    ];
-
-        # You also need \x01 and \x02 to separate escape sequence, due to:
-        # https://stackoverflow.com/a/9468954/1147688
-        sys.ps1='\x01\x1b${extendedLib.termColors.front.blue "[Python]> "}\x02>>>\x01\x1b[0m\x02 '  # bright yellow
-        sys.ps2='\x01\x1b[1;49;31m\x02...\x01\x1b[0m\x02 '  # bright red
-      '';
-    };
-
-    sessionVariables = {
-      TEXMFHOME = "$HOME/documents/texmf";
-    };
 
     pointerCursor = mkIf graphics  {
       package = pkgs.capitaine-cursors;
@@ -79,6 +68,26 @@ in {
     };
 
     keyboard.options = [ "caps:escape" ];
+
+    sessionVariables = {
+      PYTHONSTARTUP = "${config.xdg.configHome}/python/pyrc";
+    };
+  };
+
+  xdg.configFile = {
+    "ghc/ghci.conf".text = ''
+      :set prompt "${extendedLib.termColors.front.magenta "[GHCi]λ"} "
+    '';
+
+    "python/pyrc".text = ''
+      #!/usr/bin/env python3
+      import sys
+
+      # You also need \x01 and \x02 to separate escape sequence, due to:
+      # https://stackoverflow.com/a/9468954/1147688
+      sys.ps1='\x01\x1b${extendedLib.termColors.front.blue "[Python]> "}\x02>>>\x01\x1b[0m\x02 '  # bright yellow
+      sys.ps2='\x01\x1b[1;49;31m\x02...\x01\x1b[0m\x02 '  # bright red
+    '';
   };
 
   news.display = "silent";
@@ -88,6 +97,12 @@ in {
   programs = {
     home-manager.enable = true;
 
+    bash = {
+      enable = true;
+      historyFile = "${config.xdg.dataHome}/bash_history";
+      historySize = 100000;
+    };
+
     bat.enable = true;
     bottom.enable = true;
     eza.enable = true;

home/programs/zsh/default.nix

@@ -13,7 +13,9 @@
     '';
 
     # TODO: Regenerate zcompdump with a systemd timer
-    completionInit = "autoload -Uz compinit && compinit -C";
+    completionInit = ''
+      autoload -Uz compinit && compinit -C -d "${config.xdg.cacheHome}/zsh/zcompdump-$ZSH_VERSION"
+    '';
 
     history = {
       extended = true;

hosts/common.nix

@@ -25,6 +25,7 @@ in {
       experimental-features = [ "nix-command" "flakes" "repl-flake" ];
       log-lines = 50;
       trusted-users = [ "h7x4" "nix-builder" ];
+      use-xdg-base-directories = true;
     };
 
     buildMachines = [