Set up Vim with One Dark Pro colors, whitespace rendering, configure tmux to use better colors, and enable viewing tmux scrollback via mousewheel

Auto-config vim and tmux

mkdir -p ~/.vim/autoload ~/.vim/colors &&
curl -fsSL https://raw.githubusercontent.com/joshdick/onedark.vim/refs/heads/main/autoload/onedark.vim -o ~/.vim/autoload/onedark.vim &&
curl -fsSL https://raw.githubusercontent.com/joshdick/onedark.vim/refs/heads/main/colors/onedark.vim -o ~/.vim/colors/onedark.vim &&
(touch ~/.vimrc; grep -qxF 'colorscheme onedark' ~/.vimrc || echo 'colorscheme onedark' >> ~/.vimrc) &&
echo "syntax on" >> ~/.vimrc &&
echo "set tabstop=4 shiftwidth=4 autoindent cursorline softtabstop=-1" >> ~/.vimrc &&
echo "set list listchars=tab:⟶\ ,trail:·,extends:>,precedes:<,nbsp:% lcs+=space:· listchars-=eol:$" >> ~/.vimrc &&

# Enable true color support in terminal Vim and Neovim
if (has("nvim"))
	export NVIM_TUI_ENABLE_TRUE_COLOR=1
endif

if (has("termguicolors"))
	set termguicolors
endif

cat <<EOT >> ~/.tmux.conf
set -g mouse on
set-option -g mouse on
setw -g mode-mouse on

# make scrolling with wheels page tmux history instead of default behavior (warning: breaks selection)
bind -n WheelUpPane if-shell -F -t = "#{mouse_any_flag}" "send-keys -M" "if -Ft= '#{pane_in_mode}' 'send-keys -M' 'select-pane -t=; copy-mode -e; send-keys -M'"
bind -n WheelDownPane select-pane -t= \; send-keys -M
EOT

# If you use this, you must hold SHIFT, CTRL, or ALT depending on your OS to select text like before for copying/pasting

echo "Run this command to trigger tmux to reload the config without restarting:"
echo "source-file ~/.tmux.conf"
echo "To turn off mouse mode, run in tmux after hitting your prefix key: ':set -g mouse on' or 'set -g mode-mouse off' for older versions"