# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1539354076 -7200
# Node ID b19f676203fde4467ce2e471f654a14dfa844f22
# Parent  55b40f3fa65998e43512f610aaf7a529f26a4a03
util.dependencies: Add compat code for normalization of socket constructors

Old LuaSocket had only tcp() which was IPv4-only. LuaSocket ~3.0 adds a
tcp6() that creates a IPv6 socket. Some version moves tcp() to tcp4()
and adds an IP-version-agnostic tcp() constructor.

diff -r 55b40f3fa659 -r b19f676203fd util/dependencies.lua
--- a/util/dependencies.lua	Thu Oct 11 19:23:21 2018 +0100
+++ b/util/dependencies.lua	Fri Oct 12 16:21:16 2018 +0200
@@ -77,6 +77,10 @@
 				["Source"] = "http://www.tecgraf.puc-rio.br/~diego/professional/luasocket/";
 			});
 		fatal = true;
+	elseif not socket.tcp4 then
+		-- COMPAT LuaSocket before being IP-version agnostic
+		socket.tcp4 = socket.tcp;
+		socket.udp4 = socket.udp;
 	end
 
 	local lfs, err = softreq "lfs"