# we need to use which twice - first for checking if
# the command doesn't fail, the use it if doesn't fail
set vim_cond = `command -v vim`
set vi_cond = `command -v vi`

switch ( $vim_cond-$vi_cond )
  case /usr/bin/vim-/usr/bin/vi:
      # apply only when founded vim and vi are in expected dirs from distro
      alias vi vim
      alias view 'vim -R'
      breaksw
  case -/usr/bin/vi:
      # apply only if founded vi is in expected dir from distro
      alias vim "read -rep 'No vim found, using vi, press ENTER to continue' -n1 -t 20 -s && vi"
      breaksw
endsw

# just in case
unset vim_cond
unset vi_cond