common

function link_override {
  hostname=$(hostname)
  default_target=$1$2
  override_target=$1-$hostname$2
  link_name=${3:-.$1$2}
  if [ -e "$override_target" ]; then
    link_file $override_target $link_name
  else
    link_file $default_target $link_name
  fi 
}

function link_file {
  # the symlink target/file in the repo
  target=$PWD/$1
  link_name=$HOME/${2:-.$1}
  if [ -e "$link_name" ]; then
    # file exists
    if [ -L "$link_name" ]; then
      # it is a link
      existing_target=$(readlink $link_name)
      if [ -n $existing_target ]; then
        if [ ! "$existing_target" = "$target" ]; then
          echo Link already exists but links to $existing_target, overwrite with $target?
          ln -vis $target $link_name
        fi
      else
        echo "Previous link broken, overwriting"
        ln -vis $target $link_name
      fi
    else
      echo warning: File exists and is not a symlink, wanted target dotfile: $target link_name: $link_name
    fi
  else
    mkdir -vp $(dirname $link_name)
    ln -vs $target $link_name
  fi
}

function copy_file {
  target=$PWD/$1
  copy_to=$HOME/${2:-.$1}

  mkdir -vp $(dirname $copy_to)
  cp -f $target $copy_to
}