Re-add t script

modules/scripts/t.nix

@@ -0,0 +1,77 @@
+{
+  flake.modules.homeManager.base =
+    { pkgs, ... }:
+    {
+      home.packages = [
+        (pkgs.writeShellApplication {
+          name = "t";
+
+          runtimeInputs = with pkgs; [ fzf ];
+
+          text = ''
+            set -euo pipefail
+
+            # Based on https://github.com/jessarcher/dotfiles/blob/master/scripts/t
+            # and https://github.com/ThePrimeagen/tmux-sessionizer.
+
+            has_session() {
+              tmux list-sessions | grep -q "^$1:"
+            }
+
+            hydrate() {
+              if [ -f "$2/.tmux-sessionizer" ]; then
+                tmux send-keys -t "$1" "source $2/.tmux-sessionizer" c-M
+              elif [ -f "$HOME/.tmux-sessionizer" ]; then
+                tmux send-keys -t "$1" "source $HOME/.tmux-sessionizer" c-M
+              fi
+            }
+
+            is_tmux_running() {
+              tmux_running=$(pgrep tmux)
+
+              if [[ -z ''${TMUX:-} ]] && [[ -z $tmux_running ]]; then
+                return 1
+              fi
+
+              return 0
+            }
+
+            switch_to() {
+              tmux attach-session -t "$1" || tmux switch-client -t "$1"
+            }
+
+            if [[ $# -eq 1 ]]; then
+              selected=$1
+            else
+              items=$(
+                find "$HOME/Code" -maxdepth 3 -mindepth 1 -type d
+                find "$HOME/Documents" -maxdepth 1 -mindepth 1 -type d
+                find "$HOME/tmp" -maxdepth 1 -type d
+              )
+
+              selected=$(echo "$items" | sed "s|^$HOME/||" | sort | fzf)
+              [[ $selected ]] && selected="$HOME/$selected"
+            fi
+
+            if [[ -z $selected ]]; then
+              exit 0
+            fi
+
+            selected_name=$(basename "$selected" | tr . _)
+
+            if ! is_tmux_running; then
+              tmux new-session -ds "$selected_name" -c "$selected"
+              hydrate "$selected_name" "$selected"
+            fi
+
+            if ! has_session "$selected_name"; then
+              tmux new-session -ds "$selected_name" -c "$selected"
+              hydrate "$selected_name" "$selected"
+            fi
+
+            switch_to "$selected_name"
+          '';
+        })
+      ];
+    };
+}