prosodyctl shell: Move non-error result lines back to stdout, suppress with --quiet We're figuring out how to keep usability and support machine-readability too. We moved the status line (repl-result) to stderr so that when parsing something like a table, it didn't get in the way. However sometimes the status line is the thing we want to parse (e.g. invite creation). Parsing stderr loses one of the purposes of stderr - to have an error-only channel to emit stuff out of band (such as error messages). So the new approach is: - Status line on stdout, unless it's an error - If you're parsing the output ("content") of the command, pass --quiet to suppress the status line.

local data = {}
local getinfo = debug.getinfo;
local function linehook(ev, li)
	local S = getinfo(2, "S");
	if S and S.source and S.source:match"^@" then
		local file = S.source:sub(2);
		local lines = data[file];
		if not lines then
			lines = {};
			data[file] = lines;
			for line in io.lines(file) do
				lines[#lines+1] = line;
			end
		end
		io.stderr:write(ev, " ", file, " ", li, " ", lines[li], "\n");
	end
end
debug.sethook(linehook, "l");