prezto_config/modules/utility/functions/diff

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#
# Highlights diff output.
#
# Authors:
# Sorin Ionescu <sorin.ionescu@gmail.com>
#
if zstyle -t ':omz:module:utility:diff' color; then
function diff {
if (( $+commands[colordiff] )); then
"$commands[diff]" --unified "$@" | colordiff --difftype diffu
elif (( $+commands[git] )); then
git --no-pager diff --color=auto --no-ext-diff --no-index "$@"
else
"$commands[diff]" --unified "$@"
fi
}
else
unfunction diff
fi
diff --unified "$@"