+function init_logging()
+ -- Initialize logging
+ require "core.loggingmanager"
+end
+
+function check_dependencies()
+ -- Check runtime dependencies
+ if not require "util.dependencies".check_dependencies() then
+ os.exit(1);
+ end
+end
+
+function sandbox_require()
+ -- Replace require() with one that doesn't pollute _G, required
+ -- for neat sandboxing of modules
+ local _realG = _G;
+ local _real_require = require;
+ function require(...)
+ local curr_env = getfenv(2);
+ local curr_env_mt = getmetatable(getfenv(2));
+ local _realG_mt = getmetatable(_realG);
+ if curr_env_mt and curr_env_mt.__index and not curr_env_mt.__newindex and _realG_mt then
+ local old_newindex
+ old_newindex, _realG_mt.__newindex = _realG_mt.__newindex, curr_env;
+ local ret = _real_require(...);
+ _realG_mt.__newindex = old_newindex;
+ return ret;
+ end
+ return _real_require(...);
+ end
+end
+
+function set_function_metatable()
+ local mt = {};
+ function mt.__index(f, upvalue)
+ local i, name, value = 0;
+ repeat
+ i = i + 1;
+ name, value = debug.getupvalue(f, i);
+ until name == upvalue or name == nil;
+ return value;
+ end
+ function mt.__newindex(f, upvalue, value)
+ local i, name = 0;
+ repeat
+ i = i + 1;
+ name = debug.getupvalue(f, i);
+ until name == upvalue or name == nil;
+ if name then
+ debug.setupvalue(f, i, value);
+ end
+ end
+ debug.setmetatable(function() end, mt);
+end
+