fix(upgrate-tests): use system lua for luarocks

Author: fffonion

scripts/upgrade-tests/luarocks-system-lua

@@ -0,0 +1,38 @@
+#!/usr/bin/lua
+package.loaded["luarocks.core.hardcoded"] = { SYSCONFDIR = [[/usr/local/etc/luarocks]], LUA_VERSION = "5.1" }
+package.path=[[/usr/local/share/lua/5.1/?.lua;]] .. package.path
+local list = package.searchers or package.loaders; table.insert(list, 1, function(name) if name:match("^luarocks%.") then return loadfile([[/usr/local/share/lua/5.1/]] .. name:gsub([[%.]], [[/]]) .. [[.lua]]) end end)
+
+-- Load cfg first so that the loader knows it is running inside LuaRocks
+local cfg = require("luarocks.core.cfg")
+
+local loader = require("luarocks.loader")
+local cmd = require("luarocks.cmd")
+
+local description = "LuaRocks main command-line interface"
+
+local commands = {
+   init = "luarocks.cmd.init",
+   pack = "luarocks.cmd.pack",
+   unpack = "luarocks.cmd.unpack",
+   build = "luarocks.cmd.build",
+   install = "luarocks.cmd.install",
+   search = "luarocks.cmd.search",
+   list = "luarocks.cmd.list",
+   remove = "luarocks.cmd.remove",
+   make = "luarocks.cmd.make",
+   download = "luarocks.cmd.download",
+   path = "luarocks.cmd.path",
+   show = "luarocks.cmd.show",
+   new_version = "luarocks.cmd.new_version",
+   lint = "luarocks.cmd.lint",
+   write_rockspec = "luarocks.cmd.write_rockspec",
+   purge = "luarocks.cmd.purge",
+   doc = "luarocks.cmd.doc",
+   upload = "luarocks.cmd.upload",
+   config = "luarocks.cmd.config",
+   which = "luarocks.cmd.which",
+   test = "luarocks.cmd.test",
+}
+
+cmd.run_command(description, commands, "luarocks.cmd.external", ...)

scripts/upgrade-tests/test-upgrade-path.sh

@@ -75,6 +75,9 @@ function prepare_container() {
     docker exec $1 apt-get install -y build-essential curl m4 unzip git
     docker exec $1 bash -c "ln -sf /usr/local/kong/include/* /usr/include"
     docker exec $1 bash -c "ln -sf /usr/local/kong/lib/* /usr/lib"
+    # the following two lines will not be needed on 3.11+
+    docker exec -u 0 $1 apt-get install -y lua5.1
+    docker cp scripts/upgrade-tests/luarocks-system-lua $1:/usr/local/bin/luarocks
 }
 
 function build_containers() {