prosody
9a12fc2baa37
tools/migration/main.lua

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tools/migration/main.lua @ 4211:9a12fc2baa37

tools/migration/*.lua: Rename config to migrator.cfg.lua, add error handling for config and command-line parameters
author Matthew Wild <mwild1@gmail.com>
date Fri, 25 Feb 2011 03:32:44 +0000
parent 4210:4583473dcce4
child 4216:ff80a8471e86
comparison
equal deleted inserted replaced
4210:4583473dcce4 4211:9a12fc2baa37
1 local default_config = "./migrator.cfg.lua";
2
1 -- Command-line parsing 3 -- Command-line parsing
2 local options = {}; 4 local options = {};
3 local handled_opts = 0; 5 local handled_opts = 0;
4 for i = 1, #arg do 6 for i = 1, #arg do
5 if arg[i]:sub(1,2) == "--" then 7 if arg[i]:sub(1,2) == "--" then
13 end 15 end
14 end 16 end
15 table.remove(arg, handled_opts); 17 table.remove(arg, handled_opts);
16 18
17 -- Load config file 19 -- Load config file
18 local function loadfilein(file, env) return loadin and loadin(env, io.open(file):read("*a")) or setfenv(loadfile(file), env); end 20 local function loadfilein(file, env)
21 if loadin then
22 return loadin(env, io.open(file):read("*a"));
23 else
24 local chunk, err = loadfile(file);
25 if chunk then
26 setfenv(chunk, env);
27 end
28 return chunk, err;
29 end
30 end
31
32 local config_file = options.config or default_config;
33 local from_store = arg[1] or "input";
34 local to_store = arg[2] or "output";
35
19 config = {}; 36 config = {};
20 local config_env = setmetatable({}, { __index = function(t, k) return function(tbl) config[k] = tbl; end; end }); 37 local config_env = setmetatable({}, { __index = function(t, k) return function(tbl) config[k] = tbl; end; end });
21 loadfilein(options.config or "config.lua", config_env)(); 38 local config_chunk, err = loadfilein(config_file, config_env);
39 if not config_chunk then
40 print("There was an error loading the config file, check the file exists");
41 print("and that the syntax is correct:");
42 print("", err);
43 os.exit(1);
44 end
45
46 config_chunk();
22 47
23 if not package.loaded["util.json"] then 48 if not package.loaded["util.json"] then
24 package.path = "../../?.lua;"..package.path 49 package.path = "../../?.lua;"..package.path
25 package.cpath = "../../?.dll;"..package.cpath 50 package.cpath = "../../?.dll;"..package.cpath
26 end 51 end
27 52
28 local from_store = arg[1] or "input"; 53 local have_err;
29 local to_store = arg[2] or "output"; 54 if #arg > 0 and #arg ~= 2 then
55 have_err = true;
56 print("Error: Incorrect number of parameters supplied.");
57 end
58 if not config[from_store] then
59 have_err = true;
60 print("Error: Input store '"..from_store.."' not found in the config file.");
61 end
62 if not config[to_store] then
63 have_err = true;
64 print("Error: Output store '"..to_store.."' not found in the config file.");
65 end
66 if not config[from_store].type then
67 have_err = true;
68 print("Error: Input store type not specified in the config file");
69 elseif not pcall(require, config[from_store].type) then
70 have_err = true;
71 print("Error: Unrecognised store type for '"..from_store.."': "..config[from_store].type);
72 end
73 if not config[to_store].type then
74 have_err = true;
75 print("Error: Output store type not specified in the config file");
76 elseif not pcall(require, config[to_store].type) then
77 have_err = true;
78 print("Error: Unrecognised store type for '"..to_store.."': "..config[to_store].type);
79 end
30 80
31 assert(config[from_store], "no input specified") 81 if have_err then
32 assert(config[to_store], "no output specified") 82 print("");
33 local itype = assert(config[from_store].type, "no type specified for "..from_store); 83 print("Usage: "..arg[0].." FROM_STORE TO_STORE");
34 local otype = assert(config[to_store].type, "no type specified for "..to_store); 84 print("If no stores are specified, 'input' and 'output' are used.");
85 print("");
86 print("The available stores in your migrator config are:");
87 print("");
88 for store in pairs(config) do
89 print("", store);
90 end
91 os.exit(1);
92 end
93
94 local itype = config[from_store].type;
95 local otype = config[to_store].type;
35 local reader = require(itype).reader(config[from_store]); 96 local reader = require(itype).reader(config[from_store]);
36 local writer = require(otype).writer(config[to_store]); 97 local writer = require(otype).writer(config[to_store]);
37 98
38 local json = require "util.json"; 99 local json = require "util.json";
39 100