Revert "Remove tmux"

This reverts commit a7556575ac.

lib/shared/home-manager-packages.nix

@@ -20,6 +20,7 @@ let
   );
   notetaker = writeShellApplication (import ./scripts/notetaker.nix);
   run = writeShellApplication (import ./scripts/run.nix { inherit pkgs; });
+  t = writeShellApplication (import ./scripts/t.nix { inherit pkgs; });
   timer = writeShellApplication (import ./scripts/timer.nix);
 in
 with pkgs;

lib/shared/home-manager.nix

@@ -30,6 +30,7 @@ in
     ./modules/phpactor.nix
     ./modules/ripgrep.nix
     ./modules/syncthing.nix
+    ./modules/tmux.nix
     ./modules/zellij.nix
     ./modules/zsh.nix
   ];

lib/shared/modules/tmux.nix

@@ -0,0 +1,82 @@
+{ pkgs, ... }:
+let
+  inherit (pkgs) tmuxPlugins;
+in
+{
+  programs.tmux = {
+    enable = true;
+
+    terminal = "tmux-256color";
+
+    extraConfig = ''
+      set-option -g status-keys "vi"
+      set-option -sa terminal-features "''${TERM}:RGB"
+
+      bind -n S-Left resize-pane -L 2
+      bind -n S-Right resize-pane -R 2
+      bind -n S-Down resize-pane -D 1
+      bind -n S-Up resize-pane -U 1
+
+      bind -n C-Left resize-pane -L 10
+      bind -n C-Right resize-pane -R 10
+      bind -n C-Down resize-pane -D 5
+      bind -n C-Up resize-pane -U 5
+
+      # Status line customisation
+      set-option -g status-left ""
+      set-option -g status-right " #{session_name}"
+      set-option -g status-right-length 100
+      set-option -g status-style "fg=#7C7D83 bg=default"
+      set-option -g window-status-activity-style none
+      set-option -g window-status-current-format "#{window_index}:#{pane_current_command}#{window_flags} "
+      set-option -g window-status-current-style "fg=#E9E9EA"
+      set-option -g window-status-format "#{window_index}:#{pane_current_command}#{window_flags} "
+
+      bind c new-window -c "#{pane_current_path}"
+
+      set -g base-index 1
+      set -g pane-base-index 1
+      set -g renumber-windows on
+
+      # Break a pane into a new window.
+      bind-key b break-pane -d
+      bind-key J command-prompt -p "join pane from: "  "join-pane -h -s '%%'"
+
+      bind-key C-j choose-tree
+
+      # Use vim keybindings in copy mode
+      setw -g mode-keys vi
+
+      # Setup 'v' to begin selection as in Vim
+      bind-key -T copy-mode-vi 'v' send -X begin-selection
+      bind-key -T copy-mode-vi 'y' send -X copy-pipe wl-copy
+
+      bind C-j split-window -v "tmux list-sessions | sed -E 's/:.*$//' | grep -v \"^$(tmux display-message -p '#S')\$\" | fzf --reverse | xargs tmux switch-client -t"
+
+      bind-key K run-shell 'tmux switch-client -n \; kill-session -t "$(tmux display-message -p "#S")" || tmux kill-session'
+
+      # Allow clearing screen with ctrl-l by using <prefix> C-l
+      bind C-l send-keys "C-l"
+      bind C-k send-keys "C-k"
+
+      # Enable mouse support.
+      setw -g mouse on
+
+      # Remove delay when switching Vim modes.
+      set -sg escape-time 0
+
+      set-option -g pane-active-border-style "fg=#1f2335"
+      set-option -g pane-border-style "fg=#1f2335"
+
+      bind-key -r f run-shell "tmux new-window t"
+
+      set -g @resurrect-strategy-nvim 'session'
+    '';
+
+    plugins = [
+      tmuxPlugins.resurrect
+      tmuxPlugins.vim-tmux-navigator
+      tmuxPlugins.yank
+    ];
+  };
+}

lib/shared/modules/zsh/abbreviations.zsh

@@ -32,6 +32,11 @@ abbr gs="git status"
 abbr gsh="git show"
 abbr gst="git status"
 
+# tmux
+abbr ta="tmux attach"
+abbr tl="tmux list-sessions"
+abbr tk="tmux kill-session"
+
 # zellij
 abbr czs="create-zellij-session"
 abbr z="zellij"

lib/shared/scripts/t.nix

@@ -0,0 +1,86 @@
+{ pkgs }:
+
+{
+  name = "t";
+
+  runtimeInputs = with pkgs; [
+    openssl
+    tmux
+  ];
+
+  text = ''
+    # Credit to ThePrimeagen and Jess Archer.
+
+    function execute_tmux_file {
+      local tmux_file="$1"
+      selected_path="$2"
+      session_name="$3"
+
+      DIGEST="$(openssl sha512 "$tmux_file")"
+
+      # Prompt the first time we see a given .tmux file before running it.
+      if ! grep -q "$DIGEST" ~/..tmux.digests 2> /dev/null; then
+        cat "$tmux_file"
+
+        read -r -n 1 -p "Trust (and run) this .tmux file? (t = trust, otherwise = skip) "
+
+        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 "$session_name"
+    }
+
+    main "$@"
+  '';
+}