prosody
cc9dff0212f4
util/envload.lua

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util/envload.lua @ 9624:cc9dff0212f4 0.11

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author Matthew Wild <mwild1@gmail.com>
date Tue, 13 Nov 2018 15:03:24 +0000
parent 8416:bc9cb23b604a
child 12576:d1aacc6a81ac
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ef1eb65acbba util.envload: New module to abstract Lua 5.1's setfenv and Lua 5.2's load
Florian Zeitz <florob@babelmonkeys.de>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2011 Florian Zeitz
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6 --
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7 -- luacheck: ignore 113/setfenv 113/loadstring
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8
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9 local load, loadstring, setfenv = load, loadstring, setfenv;
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10 local io_open = io.open;
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11 local envload;
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12 local envloadfile;
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13
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14 if setfenv then
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15 function envload(code, source, env)
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16 local f, err = loadstring(code, source);
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17 if f and env then setfenv(f, env); end
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18 return f, err;
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19 end
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21 function envloadfile(file, env)
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22 local fh, err, errno = io_open(file);
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23 if not fh then return fh, err, errno; end
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24 local f, err = load(function () return fh:read(2048); end, "@"..file);
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25 fh:close();
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26 if f and env then setfenv(f, env); end
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27 return f, err;
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28 end
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29 else
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30 function envload(code, source, env)
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31 return load(code, source, nil, env);
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32 end
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33
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34 function envloadfile(file, env)
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35 local fh, err, errno = io_open(file);
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36 if not fh then return fh, err, errno; end
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37 local f, err = load(fh:lines(2048), "@"..file, nil, env);
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38 fh:close();
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39 return f, err;
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40 end
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41 end
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42
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43 return { envload = envload, envloadfile = envloadfile };