tmux macOS setup — TPM + Dracula theme

tmux-setup.zsh

#!/usr/bin/env zsh

# ============================================================
#  tmux setup script for macOS
#  Installs: Homebrew, tmux, TPM, Dracula theme + plugins
# ============================================================

set -e

GREEN='\033[0;32m'
YELLOW='\033[1;33m'
CYAN='\033[0;36m'
RESET='\033[0m'

log()  { echo "${GREEN}✔ $1${RESET}" }
info() { echo "${CYAN}→ $1${RESET}" }
warn() { echo "${YELLOW}⚠ $1${RESET}" }

# ------------------------------------------------------------
# 1. Homebrew
# ------------------------------------------------------------
info "Checking for Homebrew..."
if ! command -v brew &>/dev/null; then
  warn "Homebrew not found. Installing..."
  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
  # Add Homebrew to PATH for Apple Silicon Macs
  if [[ -f /opt/homebrew/bin/brew ]]; then
    eval "$(/opt/homebrew/bin/brew shellenv)"
  fi
  log "Homebrew installed."
else
  log "Homebrew already installed."
fi

# ------------------------------------------------------------
# 2. tmux
# ------------------------------------------------------------
info "Checking for tmux..."
if ! command -v tmux &>/dev/null; then
  brew install tmux
  log "tmux installed."
else
  log "tmux already installed: $(tmux -V)"
fi

# ------------------------------------------------------------
# 3. GitHub CLI (gh) — needed for Gist upload at the end
# ------------------------------------------------------------
info "Checking for GitHub CLI (gh)..."
if ! command -v gh &>/dev/null; then
  brew install gh
  log "GitHub CLI installed."
else
  log "GitHub CLI already installed: $(gh --version | head -1)"
fi

# ------------------------------------------------------------
# 4. TPM (Tmux Plugin Manager)
# ------------------------------------------------------------
TPM_DIR="$HOME/.tmux/plugins/tpm"
info "Checking for TPM..."
if [[ ! -d "$TPM_DIR" ]]; then
  git clone https://github.com/tmux-plugins/tpm "$TPM_DIR"
  log "TPM cloned to $TPM_DIR"
else
  log "TPM already exists at $TPM_DIR"
fi

# ------------------------------------------------------------
# 5. Write ~/.tmux.conf
# ------------------------------------------------------------
TMUX_CONF="$HOME/.tmux.conf"
info "Writing $TMUX_CONF..."

if [[ -f "$TMUX_CONF" ]]; then
  cp "$TMUX_CONF" "${TMUX_CONF}.bak.$(date +%Y%m%d%H%M%S)"
  warn "Existing ~/.tmux.conf backed up."
fi

cat > "$TMUX_CONF" << 'TMUXCONF'
# ============================================================
#  ~/.tmux.conf — macOS starter config with Dracula theme
# ============================================================

# Remap prefix: Ctrl+b → Ctrl+a
unbind C-b
set-option -g prefix C-a
bind-key C-a send-prefix

# Enable mouse support (scroll, click panes/windows)
set -g mouse on

# Start window and pane numbering at 1
set -g base-index 1
set -g pane-base-index 1
set-window-option -g pane-base-index 1
set-option -g renumber-windows on

# Increase scrollback buffer
set -g history-limit 10000

# Use vi keys in copy mode
set-window-option -g mode-keys vi
bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-selection-and-cancel

# Split panes with | and - (and keep current path)
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"
unbind '"'
unbind %

# Reload config with prefix + r
bind r source-file ~/.tmux.conf \; display-message "Config reloaded!"

# Faster key response
set -s escape-time 0
set -g repeat-time 300

# True color support
set -g default-terminal "tmux-256color"
set -ag terminal-overrides ",xterm-256color:RGB"

# ── Plugins ────────────────────────────────────────────────
set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-sensible'    # Sane defaults
set -g @plugin 'tmux-plugins/tmux-yank'         # Copy to macOS clipboard
set -g @plugin 'tmux-plugins/tmux-resurrect'    # Save/restore sessions
set -g @plugin 'tmux-plugins/tmux-continuum'    # Auto-save sessions
set -g @plugin 'tmux-plugins/tmux-pain-control' # Standardized pane nav
set -g @plugin 'dracula/tmux'                   # Dracula theme

# ── Dracula theme config ───────────────────────────────────
set -g @dracula-plugins "cpu-usage ram-usage time"
set -g @dracula-show-powerline true
set -g @dracula-show-left-icon session
set -g @dracula-show-flags true
set -g @dracula-military-time true
set -g @dracula-refresh-rate 5
set -g @dracula-cpu-usage-label "CPU"
set -g @dracula-ram-usage-label "RAM"

# ── tmux-resurrect options ─────────────────────────────────
# Restore Neovim sessions too (requires a Session.vim file)
set -g @resurrect-strategy-nvim 'session'

# ── tmux-continuum options ─────────────────────────────────
set -g @continuum-restore 'on'
set -g @continuum-save-interval '15'

# ── Initialize TPM (MUST be last line) ─────────────────────
run '~/.tmux/plugins/tpm/tpm'
TMUXCONF

log "~/.tmux.conf written."

# ------------------------------------------------------------
# 6. Install plugins headlessly via TPM
# ------------------------------------------------------------
info "Installing tmux plugins via TPM (including Dracula)..."
tmux new-session -d -s __setup__ 2>/dev/null || true
tmux send-keys -t __setup__ "~/.tmux/plugins/tpm/bin/install_plugins" Enter
sleep 8
tmux kill-session -t __setup__ 2>/dev/null || true
log "Plugins installed."

# ------------------------------------------------------------
# Done
# ------------------------------------------------------------
echo ""
echo "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${RESET}"
echo "${GREEN}  tmux setup complete!${RESET}"
echo "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${RESET}"
echo ""
echo "  Start tmux:             ${CYAN}tmux${RESET}"
echo "  Reload config:          ${CYAN}prefix + r${RESET}  (Ctrl+a, then r)"
echo "  Install new plugins:    ${CYAN}prefix + I${RESET}  (capital I)"
echo "  Update plugins:         ${CYAN}prefix + U${RESET}"
echo "  Save session:           ${CYAN}prefix + Ctrl+s${RESET}"
echo "  Restore session:        ${CYAN}prefix + Ctrl+r${RESET}"
echo ""
echo "  Dracula status bar shows: CPU · RAM · Time"
echo ""