fish-shell/share/functions/__fish_complete_mime.fish

function __fish_complete_mime -d "Complete using text files"
	# Find all possible file completions
	set -l all
	set -l comp (commandline -ct)
	set -l base (echo $comp | sed -e 's/\.[a-zA-Z0-9]*$//')
	set -l mimetype $argv[1]
	eval "set all $base*"

	# Select text files only
	set -l files (__fish_filter_mime $mimetype $all)

	# Get descriptions for files
	set desc (mimedb -d $files)

	# Format completions and descriptions
	set -l res
	for i in (seq (count $files))
		set res $res $files[$i]\t$desc[$i]
	end

	if test $res[1]
		printf "%s\n" $res
	end

	# Also do directory completion, since there might be files
	# with the correct suffix in a subdirectory
	__fish_complete_directories $comp
end