Update t script

Stop automatically running `.tmux` files as I don't always want
everything to run when opening a project. This also simplifies the code
within the script.

This also refactors the logic for creating and switching sessions as it
didn't work 100% of the time. This is nearer to Jess Archer's version of
the script with less error output and changes needed for shellcheck.

lib/shared/scripts/t.nix

@@ -9,78 +9,30 @@
   ];
 
   text = ''
-    # Credit to ThePrimeagen and Jess Archer.
+    # Based on similar scripts by ThePrimeagen and Jess Archer.
 
-    function execute_tmux_file {
-      local tmux_file="$1"
-      selected_path="$2"
-      session_name="$3"
+    if [[ $# -eq 1 ]]; then
+      selected_path=$1
+    else
+      # Get the session name from fuzzy-finding list of directories and generating a
+      # tmux-safe version.
+      items=$(find "$REPOS" ~/Documents \
+        -maxdepth 1 -mindepth 1 -type d \
+        ! -name "_archive" \
+        ! -name "*-old" \
+        ! -name "*.old"
+      )
 
-      DIGEST="$(openssl sha512 "$tmux_file")"
+      selected_path=$(echo "''${items}" | sort | fzf --reverse)
+    fi
 
-      # Prompt the first time we see a given .tmux file before running it.
-      if ! grep -q "$DIGEST" ~/..tmux.digests 2> /dev/null; then
-        cat "$tmux_file"
+    session_name=$(basename "$selected_path" | sed 's/\./_/g')
 
-        read -r -n 1 -p "Trust (and run) this .tmux file? (t = trust, otherwise = skip) "
+    if tmux switch-client -t="$session_name" 2>/dev/null; then
+      exit 0
+    fi
 
-        if [[ $REPLY =~ ^[Tt]$ ]]; then
-          echo "$DIGEST" >> ~/..tmux.digests
-
-          create_session_and_run_tmux_file "$tmux_file" "$selected_path" "$session_name"
-        fi
-      else
-        create_session_and_run_tmux_file "$tmux_file" "$selected_path" "$session_name"
-      fi
-    }
-
-    function create_session_and_run_tmux_file {
-      tmux_file="$1"
-      selected_path="$2"
-      session_name="$3"
-
-      tmux new-session -d -c "$selected_path" -s "$session_name"
-      (cd "$selected_path" && "$tmux_file" "$session_name")
-    }
-
-    function main {
-      if [[ $# -eq 1 ]]; then
-        selected_path=$1
-      else
-        # Get the session name from fuzzy-finding list of directories and generating a
-        # tmux-safe version.
-        items=$(find "$REPOS" ~/Documents \
-          -maxdepth 1 -mindepth 1 -type d \
-          ! -name "_archive" \
-          ! -name "*-old" \
-          ! -name "*.old"
-        )
-
-        selected_path=$(echo "''${items}" | sort | fzf --reverse)
-      fi
-
-      session_name=$(basename "$selected_path" | sed 's/\./_/g')
-
-      # Attach to an existing session, if one exists.
-      if tmux has-session -t "$session_name" 2> /dev/null; then
-        tmux attach -t "$session_name" || tmux switch-client -t "$session_name"
-        exit
-      fi
-
-      if [[ -x "$selected_path/.tmux" ]]; then
-        execute_tmux_file "$selected_path/.tmux" "$selected_path" "$session_name"
-      elif [[ -x "$selected_path/.ignored/.tmux" ]]; then
-        execute_tmux_file "$selected_path/.ignored/.tmux" "$selected_path" "$session_name"
-      fi
-
-      # If there is no session, create one.
-      if ! tmux has-session -t "$session_name" 2> /dev/null; then
-        tmux new-session -d -c "$selected_path" -s "$session_name"
-      fi
-
-      tmux switch-client -t "$session_name" 2>/dev/null || tmux attach-session -t "$session_name"
-    }
-
-    main "$@"
+    ( (tmux new-session -c "$selected_path" -d -s "$session_name" && tmux switch-client -t "$session_name") 2>/dev/null ) ||
+      tmux new-session -c "$selected_path" -A -s "$session_name"
   '';
 }