Add worktrunk shell integration

modules/home/terminal/worktrunk.nix

@@ -0,0 +1,103 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib) mkIf types;
+
+  cfg = config.programs.worktrunk;
+in {
+  options.programs.worktrunk = {
+    enable = lib.mkEnableOption "worktrunk, a CLI tool for managing work sessions";
+
+    package = lib.mkPackageOption pkgs "worktrunk" {nullable = true;};
+
+    enableBashIntegration = lib.hm.shell.mkBashIntegrationOption {inherit config;};
+
+    enableFishIntegration = lib.hm.shell.mkFishIntegrationOption {inherit config;};
+
+    enableNushellIntegration = lib.hm.shell.mkNushellIntegrationOption {inherit config;};
+
+    enableZshIntegration = lib.hm.shell.mkZshIntegrationOption {inherit config;};
+
+    shellWrapperName = lib.mkOption {
+      type = types.str;
+      default = "wt";
+      example = "wt";
+      description = ''
+        Name of the shell wrapper to be called.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = mkIf (cfg.package != null) [cfg.package];
+
+    programs = let
+      bashIntegration = ''
+        ${cfg.shellWrapperName}() {
+            local directive_file=$(mktemp)
+            WORKTRUNK_DIRECTIVE_FILE="$directive_file" command ${
+          if cfg.shellWrapperName != "wt"
+          then "wt"
+          else "\${WORKTRUNK_BIN:-wt}"
+        } "$@"
+            if [[ -s "$directive_file" ]]; then
+                source "$directive_file"
+            fi
+            rm -f "$directive_file"
+        }
+      '';
+
+      fishIntegration = ''
+        set -l directive_file (mktemp)
+        ${
+          if cfg.shellWrapperName != "wt"
+          then ''
+            env WORKTRUNK_DIRECTIVE_FILE=$directive_file wt $argv''
+          else ''
+            set -q WORKTRUNK_BIN; or set -l WORKTRUNK_BIN wt
+            env WORKTRUNK_DIRECTIVE_FILE=$directive_file $WORKTRUNK_BIN $argv''
+        }
+        if test -s "$directive_file"
+            set -l directive (string collect < "$directive_file")
+            eval $directive
+        end
+        command rm -f "$directive_file"
+      '';
+
+      nushellIntegration = ''
+        def --env --wrapped ${cfg.shellWrapperName} [...args] {
+            let directive_file = (mktemp --tmpdir)
+            let worktrunk_bin = (${
+          if cfg.shellWrapperName != "wt"
+          then "'wt'"
+          else "$env.WORKTRUNK_BIN? | default 'wt'"
+        })
+            with-env { WORKTRUNK_DIRECTIVE_FILE: $directive_file } {
+                ^$worktrunk_bin ...$args
+            }
+            if ($directive_file | path exists) {
+                let directives = open $directive_file --raw | str trim | lines
+                for directive in $directives {
+                    if ($directive | str starts-with "cd '") {
+                        let target_dir = $directive | str substring 4..-2
+                        cd $target_dir
+                    }
+                }
+            }
+            rm -f $directive_file
+        }
+      '';
+    in {
+      bash.initExtra = mkIf cfg.enableBashIntegration bashIntegration;
+
+      zsh.initContent = mkIf cfg.enableZshIntegration bashIntegration;
+
+      fish.functions.${cfg.shellWrapperName} = mkIf cfg.enableFishIntegration fishIntegration;
+
+      nushell.extraConfig = mkIf cfg.enableNushellIntegration nushellIntegration;
+    };
+  };
+}