dotfiles/setup

#!/usr/bin/env bash

if [[ -z "$XDG_CONFIG_HOME" ]]; then
  export XDG_CONFIG_HOME="$HOME/.config"
fi

dfp=$(cd "$(dirname "${BASH_SOURCE[0]}" )/" && pwd)

ALERT_AGREEMENT_FILE="$dfp/.agreed-to-erasing-files.lock"

# Let user know that this script will delete their current configuration and
# that they should read this script before running. We'll use a lock file so
# the user only needs to agree once.
if [ -f "$ALERT_AGREEMENT_FILE" ]; then
    # User agreed already - do nothing
    echo "Linking..."
else
    echo "Running this script may delete existing personal configuration files."
    echo "Please view this script's source, fully understand it, and backup any"
    echo "files before continuing."
    echo "Seriously. Like... entire directories. Just gone."
    read -r -p "Are you sure you want to continue? [y/N] " response
    response=${response,,} # to lower case
    if [[ $response =~ ^(yes|y)$ ]]; then
        echo "agreed" > "$ALERT_AGREEMENT_FILE"
    else
        exit 1
    fi
fi

# TODO: make sure we have an even number, here
links=(
     # desktop environment files
     "$dfp/de/bspwmrc"                  "$XDG_CONFIG_HOME/bspwm/bspwmrc"
     "$dfp/de/sxhkdrc"                  "$XDG_CONFIG_HOME/sxhkd/sxhkdrc"
     "$dfp/de/xresources"               "$HOME/.Xresources"
     "$dfp/de/xinitrc"                  "$HOME/.xinitrc"
     "$dfp/de/xprofile"                 "$HOME/.xprofile"
     "$dfp/common/colors/xresources"    "$HOME/.Xresources.colors"

     # bar files
     "$dfp/de/bar/polybar-config"       "$XDG_CONFIG_HOME/polybar/config"

     # shell files
     "$dfp/shell/bashrc"                "$HOME/.bashrc"
     "$dfp/shell/bash_profile"          "$HOME/.bash_profile"
     "$dfp/shell/tmux.conf"             "$HOME/.tmux.conf"
     "$dfp/shell/tmux-layouts"          "$HOME/.tmux/layouts"

     # text editor files
     "$dfp/text-editor/neovim/"         "$XDG_CONFIG_HOME/nvim"
     "$dfp/text-editor/neovim/"         "$HOME/.vim"
     "$dfp/text-editor/neovim/init.vim" "$HOME/.vimrc"
     "$dfp/common/colors/vim"           "$XDG_CONFIG_HOME/nvim/colors/base16-donokai.vim"

     # irc files
     "$dfp/misc/irssi/"                 "$HOME/.irssi"
     "$dfp/misc/weechat/"                 "$HOME/.weechat"
)

source=""
for i in "${links[@]}"; do
  if [ -n "$source" ]; then
    if [ -L "$i" ]; then # if symlink exists, delete it
      rm -rf "$i"
    fi
    if [ -f "$i" ]; then # if file exists, delete it
      rm -rf "$i"
    fi
    if [ -d "$i" ]; then # if directory exists, delete it
      rm -rf "$i"
    fi
    # check if the directory that will contain the link exists
    DIR_TO_LINK=$(dirname "$i")
    if [ -d "$DIR_TO_LINK" ]; then
      :
    else
      mkdir -p "$DIR_TO_LINK"
    fi
    ln -s "$source" "$i"
    echo "Linked $(basename $source) to $i."
    source=""
  else
    source="$i"
  fi
done

echo "Done."