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tools/migration/prosody-migrator.lua @ 4731:84596fc32b31
hostmanager: Add some TODO comments
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 27 Apr 2012 22:32:04 +0100 |
parent | 4240:b3d9063aad4d |
child | 5021:85b2689dbcfe |
rev | line source |
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1 #!/usr/bin/env lua |
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2 |
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3 CFG_SOURCEDIR=os.getenv("PROSODY_SRCDIR"); |
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4 CFG_CONFIGDIR=os.getenv("PROSODY_CFGDIR"); |
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5 |
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6 -- Substitute ~ with path to home directory in paths |
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7 if CFG_CONFIGDIR then |
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8 CFG_CONFIGDIR = CFG_CONFIGDIR:gsub("^~", os.getenv("HOME")); |
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9 end |
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10 |
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11 if CFG_SOURCEDIR then |
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12 CFG_SOURCEDIR = CFG_SOURCEDIR:gsub("^~", os.getenv("HOME")); |
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13 end |
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14 |
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15 local default_config = (CFG_CONFIGDIR or ".").."/migrator.cfg.lua"; |
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16 |
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17 -- Command-line parsing |
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18 local options = {}; |
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19 local handled_opts = 0; |
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20 for i = 1, #arg do |
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21 if arg[i]:sub(1,2) == "--" then |
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22 local opt, val = arg[i]:match("([%w-]+)=?(.*)"); |
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23 if opt then |
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24 options[(opt:sub(3):gsub("%-", "_"))] = #val > 0 and val or true; |
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25 end |
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26 handled_opts = i; |
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27 else |
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28 break; |
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29 end |
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30 end |
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31 table.remove(arg, handled_opts); |
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32 |
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33 -- Load config file |
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34 local function loadfilein(file, env) |
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35 if loadin then |
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36 return loadin(env, io.open(file):read("*a")); |
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37 else |
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38 local chunk, err = loadfile(file); |
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39 if chunk then |
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40 setfenv(chunk, env); |
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41 end |
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42 return chunk, err; |
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43 end |
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44 end |
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45 |
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46 local config_file = options.config or default_config; |
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47 local from_store = arg[1] or "input"; |
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48 local to_store = arg[2] or "output"; |
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49 |
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50 config = {}; |
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51 local config_env = setmetatable({}, { __index = function(t, k) return function(tbl) config[k] = tbl; end; end }); |
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52 local config_chunk, err = loadfilein(config_file, config_env); |
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53 if not config_chunk then |
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54 print("There was an error loading the config file, check the file exists"); |
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55 print("and that the syntax is correct:"); |
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56 print("", err); |
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57 os.exit(1); |
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58 end |
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59 |
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60 config_chunk(); |
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61 |
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62 if CFG_SOURCEDIR then |
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63 package.path = CFG_SOURCEDIR.."/?.lua;"..package.path; |
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64 package.cpath = CFG_SOURCEDIR.."/?.so;"..package.cpath; |
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65 elseif not package.loaded["util.json"] then |
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66 package.path = "../../?.lua;"..package.path |
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67 package.cpath = "../../?.so;"..package.cpath |
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68 end |
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69 |
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70 local have_err; |
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71 if #arg > 0 and #arg ~= 2 then |
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72 have_err = true; |
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73 print("Error: Incorrect number of parameters supplied."); |
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74 end |
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75 if not config[from_store] then |
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76 have_err = true; |
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77 print("Error: Input store '"..from_store.."' not found in the config file."); |
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78 end |
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79 if not config[to_store] then |
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80 have_err = true; |
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81 print("Error: Output store '"..to_store.."' not found in the config file."); |
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82 end |
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83 |
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84 function load_store_handler(name) |
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85 local store_type = config[name].type; |
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86 if not store_type then |
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87 print("Error: "..name.." store type not specified in the config file"); |
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88 return false; |
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89 else |
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90 local ok, err = pcall(require, "migrator."..store_type); |
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91 if not ok then |
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92 if package.loaded["migrator."..store_type] then |
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93 print(("Error: Failed to initialize '%s' store:\n\t%s") |
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94 :format(name, err)); |
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95 else |
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96 print(("Error: Unrecognised store type for '%s': %s") |
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97 :format(from_store, store_type)); |
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98 end |
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99 return false; |
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100 end |
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101 end |
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102 return true; |
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103 end |
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104 |
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105 have_err = have_err or not(load_store_handler(from_store, "input") and load_store_handler(to_store, "output")); |
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106 |
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107 if have_err then |
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108 print(""); |
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109 print("Usage: "..arg[0].." FROM_STORE TO_STORE"); |
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110 print("If no stores are specified, 'input' and 'output' are used."); |
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111 print(""); |
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112 print("The available stores in your migrator config are:"); |
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113 print(""); |
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114 for store in pairs(config) do |
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115 print("", store); |
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116 end |
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117 print(""); |
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118 os.exit(1); |
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119 end |
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120 |
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121 local itype = config[from_store].type; |
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122 local otype = config[to_store].type; |
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123 local reader = require("migrator."..itype).reader(config[from_store]); |
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124 local writer = require("migrator."..otype).writer(config[to_store]); |
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125 |
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126 local json = require "util.json"; |
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127 |
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128 io.stderr:write("Migrating...\n"); |
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129 for x in reader do |
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130 --print(json.encode(x)) |
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131 writer(x); |
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132 end |
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133 writer(nil); -- close |
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134 io.stderr:write("Done!\n"); |