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#!/usr/bin/env sh
# Description: Show diff of 2 directories or multiple files in vimdiff
#
# Note: 1. vim may show the warning: 'Vim: Warning: Input is not from a terminal'
# press 'Enter' to ignore and proceed.
# 2. if only one file is in selection, the hovered file is considered as the
# second file to diff with
#
# Shell: POSIX compliant
# Authors: Arun Prakash Jana, ath3
selection=${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.selection
dirdiff() {
dir1=$(mktemp "${TMPDIR:-/tmp}"/nnn-"$(basename "$1")".XXXXXXXX)
dir2=$(mktemp "${TMPDIR:-/tmp}"/nnn-"$(basename "$2")".XXXXXXXX)
ls -A1 "$1" > "$dir1"
ls -A1 "$2" > "$dir2"
vimdiff "$dir1" "$dir2"
rm "$dir1" "$dir2"
}
if [ -s "$selection" ]; then
arr=$(tr '\0' '\n' < "$selection")
if [ "$(echo "$arr" | wc -l)" -gt 1 ]; then
f1="$(echo "$arr" | sed -n '1p')"
f2="$(echo "$arr" | sed -n '2p')"
if [ -d "$f1" ] && [ -d "$f2" ]; then
dirdiff "$f1" "$f2"
else
# If xargs supports the -o option, use it to get rid of:
# Vim: Warning: Input is not from a terminal
# xargs -0 -o vimdiff < $selection
xargs -0 vimdiff +0 < "$selection"
fi
elif ! [ -z "$1" ]; then
f1="$(echo "$arr" | sed -n '1p')"
if [ -d "$f1" ] && [ -d "$1" ]; then
dirdiff "$f1" "$1"
elif [ -f "$f1" ] && [ -f "$1" ]; then
vimdiff +0 "$f1" "$1"
else
echo "cannot compare file with directory"
fi
else
echo "needs at least 2 files or directories selected for comparison"
fi
fi
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