prezto/modules/utility/functions/wdiff

#
# Highlights wdiff output.
#
# Authors:
#   Sorin Ionescu <sorin.ionescu@gmail.com>
#   Indrajit Raychaudhuri <irc@indrajit.com>
#

# function wdiff {

if zstyle -t ':prezto:module:utility:wdiff' color; then
  if (( $+commands[wdiff] )); then
    command wdiff \
          --avoid-wraps \
          --start-delete="$(print -n $FG[red])" \
          --end-delete="$(print -n $FG[none])" \
          --start-insert="$(print -n $FG[green])" \
          --end-insert="$(print -n $FG[none])" \
          "$@" \
      | sed 's/^\(@@\( [+-][[:digit:]]*,[[:digit:]]*\)\{2\} @@\)$/;5;6m\10m/g'
  elif (( $+commands[git] )); then
    command git --no-pager diff --no-ext-diff --no-index --color=auto --color-words "$@"
  else
    command wdiff "$@"
  fi
elif (( ! $+commands[wdiff] && $+commands[git] )); then
    command git --no-pager diff --no-ext-diff --no-index --color=never "$@"
else
  command wdiff "$@"
fi

# }