prosody
d9302be05f86
util/pluginloader.lua

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util/pluginloader.lua @ 2276:d9302be05f86

util.pluginloader: Support for fetching plugins from the data store
author Matthew Wild <mwild1@gmail.com>
date Wed, 02 Dec 2009 18:05:03 +0000
parent 1522:569d58d21612
child 2325:265441f2ad48
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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10 local plugin_dir = CFG_PLUGINDIR or "./plugins/";
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12 local io_open, os_time = io.open, os.time;
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13 local loadstring, pairs = loadstring, pairs;
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14
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15 local datamanager = require "util.datamanager";
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17 module "pluginloader"
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19 local function load_from_datastore(name)
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20 local content = datamanager.load(name, "*", "plugins");
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21 if not content or not content[1] then return nil, "Resource not found"; end
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22 return content[1], name;
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23 end
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25 local function load_file(name)
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26 local file, err = io_open(plugin_dir..name);
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27 if not file then return file, err; end
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28 local content = file:read("*a");
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29 file:close();
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30 return content, name;
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31 end
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33 function load_resource(plugin, resource, loader)
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34 if not resource then
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35 resource = "mod_"..plugin..".lua";
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36 end
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37 loader = loader or load_file;
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38
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39 local content, err = loader(plugin.."/"..resource);
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40 if not content then content, err = loader(resource); end
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41 -- TODO add support for packed plugins
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42
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43 if not content and loader == load_file then
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44 return load_resource(plugin, resource, load_from_datastore);
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45 end
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47 return content, err;
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48 end
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49
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50 function store_resource(plugin, resource, content, metadata)
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51 if not resource then
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52 resource = "mod_"..plugin..".lua";
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53 end
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54 local store = { content };
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55 if metadata then
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56 for k,v in pairs(metadata) do
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57 store[k] = v;
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58 end
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59 end
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60 datamanager.store(plugin.."/"..resource, "*", "plugins", store);
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61 end
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62
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63 function load_code(plugin, resource)
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64 local content, err = load_resource(plugin, resource);
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65 if not content then return content, err; end
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66 return loadstring(content, "@"..err);
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67 end
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69 return _M;