prosody
b3d9063aad4d
tools/migration/prosody-migrator.lua

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tools/migration/prosody-migrator.lua @ 4240:b3d9063aad4d

tools/migration/prosody-migrator.lua: Add messages to show when migration is in progress
author Matthew Wild <mwild1@gmail.com>
date Tue, 05 Apr 2011 14:34:06 +0100
parent 4239:69fe5fd861e7
child 5021:85b2689dbcfe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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");