Install dotfiles from bare repo

install.sh

# curl -Lks <link-to-this-gist> | bash
set  -e

#------------------------------------------------------------------------------#
# Download
#------------------------------------------------------------------------------#
echo "> Downloading dotfiles..."
dir=.dotfiles
git clone --quiet --bare https://github.com/pablospizzamiglio/dotfiles.git "$HOME/$dir"

function cfg {
  git --git-dir="$HOME/$dir" --work-tree="$HOME" "$@";
}

#------------------------------------------------------------------------------#
# Backup already existing dotfiles
#------------------------------------------------------------------------------#
files=($(cfg ls-tree -r HEAD | awk '{print $NF}'))
bkp=.dotfiles-backup

for f in "${files[@]}"; do
  # File at root ==> back up file
  if [[ $(basename "$f") = "$f" ]]; then
    [[ -f "$HOME/$f" ]] && mkdir -p "$HOME/$bkp" && mv "$HOME/$f" "$HOME/$bkp" && echo "> Backing up: $f ==> $bkp/$f"
  # File in nested directory ==> back up outermost directory
  else
    d=${f%%/*}
    if [[ -d "$HOME/$d" ]]; then
      [[ -d "$HOME/$bkp/$d" ]] && rm -rf "$HOME/$bkp/$d"
      mkdir -p "$HOME/$bkp" && mv "$HOME/$d" "$HOME/$bkp" && echo "> Backing up: $d/ ==> $bkp/$d/"
    fi
  fi
done

#------------------------------------------------------------------------------#
# Install
#------------------------------------------------------------------------------#
cfg checkout
cfg submodule --quiet init
cfg submodule --quiet update
cfg config status.showUntrackedFiles no
echo "> Success! The following dotfiles have been installed to $HOME:"
printf '    %s\n' "${files[@]}"