Get random unsplash wallpaper for mac in your display's resolution

random.fish

#!/usr/bin/env fish
if not command -s system_profiler >/dev/null
	echo "system_profiler not found" ^&2
	exit 1
else if not command -s osascript >/dev/null
	echo "osascript not found" ^&2
	exit 1
else if not command -s xmlstarlet >/dev/null
	echo "xmlstarlet not found" ^&2
	exit 1
else if not command -s curl >/dev/null
	echo "curl not found" ^&2
	exit 1
else if not command -s sed >/dev/null
	echo "sed not found" ^&2
	exit 1
end

set resolution (system_profiler -xml SPDisplaysDataType|xmlstarlet sel -t -v "//array/dict/key[. = '_spdisplays_pixels']/following-sibling::string[1]" ^/dev/null)
set tempdir (mktemp -d)
set tempfile $tempdir/bg.jpg
curl -s "https://unsplash.it/"(echo $resolution|sed 's% x %/%')"/?random" >$tempfile
osascript -e 'tell application "Finder" to set desktop picture to POSIX file "'$tempfile'"'
rm -r $tempdir