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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4211
9a12fc2baa37 tools/migration/*.lua: Rename config to migrator.cfg.lua, add error handling for config and command-line parameters
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parents: 4210
diff changeset
1 local default_config = "./migrator.cfg.lua";
9a12fc2baa37 tools/migration/*.lua: Rename config to migrator.cfg.lua, add error handling for config and command-line parameters
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2
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3 -- Command-line parsing
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diff changeset
4 local options = {};
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diff changeset
5 local handled_opts = 0;
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diff changeset
6 for i = 1, #arg do
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7 if arg[i]:sub(1,2) == "--" then
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8 local opt, val = arg[i]:match("([%w-]+)=?(.*)");
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parents: 4166
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9 if opt then
4583473dcce4 tools/migration/main.lua: Add command-line parsing, including --config=CONFIG_FILE, and the ability to specify to/from stores to migrate
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10 options[(opt:sub(3):gsub("%-", "_"))] = #val > 0 and val or true;
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11 end
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12 handled_opts = i;
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diff changeset
13 else
4583473dcce4 tools/migration/main.lua: Add command-line parsing, including --config=CONFIG_FILE, and the ability to specify to/from stores to migrate
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diff changeset
14 break;
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15 end
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16 end
4583473dcce4 tools/migration/main.lua: Add command-line parsing, including --config=CONFIG_FILE, and the ability to specify to/from stores to migrate
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17 table.remove(arg, handled_opts);
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18
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19 -- Load config file
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20 local function loadfilein(file, env)
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21 if loadin then
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22 return loadin(env, io.open(file):read("*a"));
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23 else
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24 local chunk, err = loadfile(file);
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25 if chunk then
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26 setfenv(chunk, env);
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27 end
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28 return chunk, err;
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29 end
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30 end
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31
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32 local config_file = options.config or default_config;
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33 local from_store = arg[1] or "input";
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34 local to_store = arg[2] or "output";
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35
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36 config = {};
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37 local config_env = setmetatable({}, { __index = function(t, k) return function(tbl) config[k] = tbl; end; end });
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38 local config_chunk, err = loadfilein(config_file, config_env);
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39 if not config_chunk then
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40 print("There was an error loading the config file, check the file exists");
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41 print("and that the syntax is correct:");
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42 print("", err);
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43 os.exit(1);
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44 end
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45
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46 config_chunk();
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47
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48 if not package.loaded["util.json"] then
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49 package.path = "../../?.lua;"..package.path
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50 package.cpath = "../../?.dll;"..package.cpath
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51 end
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52
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53 local have_err;
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54 if #arg > 0 and #arg ~= 2 then
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55 have_err = true;
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56 print("Error: Incorrect number of parameters supplied.");
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57 end
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58 if not config[from_store] then
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59 have_err = true;
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60 print("Error: Input store '"..from_store.."' not found in the config file.");
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61 end
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62 if not config[to_store] then
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63 have_err = true;
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64 print("Error: Output store '"..to_store.."' not found in the config file.");
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65 end
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66 if not config[from_store].type then
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67 have_err = true;
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68 print("Error: Input store type not specified in the config file");
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69 elseif not pcall(require, config[from_store].type) then
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70 have_err = true;
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71 print("Error: Unrecognised store type for '"..from_store.."': "..config[from_store].type);
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72 end
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73 if not config[to_store].type then
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74 have_err = true;
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75 print("Error: Output store type not specified in the config file");
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76 elseif not pcall(require, config[to_store].type) then
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77 have_err = true;
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78 print("Error: Unrecognised store type for '"..to_store.."': "..config[to_store].type);
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79 end
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80
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81 if have_err then
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82 print("");
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83 print("Usage: "..arg[0].." FROM_STORE TO_STORE");
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84 print("If no stores are specified, 'input' and 'output' are used.");
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85 print("");
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86 print("The available stores in your migrator config are:");
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87 print("");
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88 for store in pairs(config) do
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89 print("", store);
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90 end
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91 os.exit(1);
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92 end
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93
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94 local itype = config[from_store].type;
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95 local otype = config[to_store].type;
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96 local reader = require(itype).reader(config[from_store]);
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97 local writer = require(otype).writer(config[to_store]);
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98
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99 local json = require "util.json";
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100
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101 for x in reader do
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102 --print(json.encode(x))
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103 writer(x);
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104 end
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105 writer(nil); -- close
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106