local utils = {}

function utils.expect_nil(result)
	if result then
		print("Error: "..result)
		os.exit(1)
	end
	return nil
end

-- https://stackoverflow.com/a/15278426
function utils.table_concat(t1, t2)
	for i=1,#t2 do
		t1[#t1+1] = t2[i]
	end
	return t1
end

-- Turns a table of strings into a string separated by separator.
function utils.join_table(table, separator)
	local string = ""
	for i=1,#table do
		string = string .. table[i] .. separator
	end
	return string
end

-- https://github.com/Donearm/scripts/blob/ad3429dc4b69e6108f538bf1656216c7a192c9fd/lib/basename.lua
function utils.basename(str)
	return string.gsub(str, "(.*/)(.*)", "%2")
end

-- https://gist.github.com/AndrewHazelden/a7b6551915a71a44770e
function utils.dirname(str)
	return str:match("(.*/)")
end

return utils