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tools/migration/main.lua @ 4216:ff80a8471e86
tools/migration/*: Numerous changes and restructuring, and the addition of a Makefile
author | Matthew Wild <mwild1@gmail.com> |
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date | Sat, 26 Feb 2011 00:23:48 +0000 |
parent | 4214:1674cd17557c |
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 local default_config = (CFG_CONFIGDIR or ".").."/migrator.cfg.lua"; |
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7 |
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8 -- Command-line parsing |
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9 local options = {}; |
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10 local handled_opts = 0; |
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11 for i = 1, #arg do |
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12 if arg[i]:sub(1,2) == "--" then |
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13 local opt, val = arg[i]:match("([%w-]+)=?(.*)"); |
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14 if opt then |
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15 options[(opt:sub(3):gsub("%-", "_"))] = #val > 0 and val or true; |
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16 end |
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17 handled_opts = i; |
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18 else |
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19 break; |
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20 end |
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21 end |
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22 table.remove(arg, handled_opts); |
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23 |
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24 -- Load config file |
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25 local function loadfilein(file, env) |
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26 if loadin then |
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27 return loadin(env, io.open(file):read("*a")); |
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28 else |
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29 local chunk, err = loadfile(file); |
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30 if chunk then |
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31 setfenv(chunk, env); |
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32 end |
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33 return chunk, err; |
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34 end |
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35 end |
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36 |
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37 local config_file = options.config or default_config; |
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38 local from_store = arg[1] or "input"; |
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39 local to_store = arg[2] or "output"; |
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40 |
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41 config = {}; |
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42 local config_env = setmetatable({}, { __index = function(t, k) return function(tbl) config[k] = tbl; end; end }); |
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43 local config_chunk, err = loadfilein(config_file, config_env); |
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44 if not config_chunk then |
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45 print("There was an error loading the config file, check the file exists"); |
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46 print("and that the syntax is correct:"); |
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47 print("", err); |
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48 os.exit(1); |
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49 end |
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50 |
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51 config_chunk(); |
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52 |
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53 if CFG_SOURCEDIR then |
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54 package.path = CFG_SOURCEDIR.."/?.lua;"..package.path; |
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55 package.cpath = CFG_SOURCEDIR.."/?.so;"..package.cpath; |
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56 elseif not package.loaded["util.json"] then |
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57 package.path = "../../?.lua;"..package.path |
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58 package.cpath = "../../?.so;"..package.cpath |
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59 end |
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60 |
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61 local have_err; |
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62 if #arg > 0 and #arg ~= 2 then |
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63 have_err = true; |
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64 print("Error: Incorrect number of parameters supplied."); |
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65 end |
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66 if not config[from_store] then |
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67 have_err = true; |
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68 print("Error: Input store '"..from_store.."' not found in the config file."); |
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69 end |
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70 if not config[to_store] then |
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71 have_err = true; |
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72 print("Error: Output store '"..to_store.."' not found in the config file."); |
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73 end |
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74 if not config[from_store].type then |
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75 have_err = true; |
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76 print("Error: Input store type not specified in the config file"); |
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77 elseif not pcall(require, "migrator."..config[from_store].type) then |
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78 have_err = true; |
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79 print("Error: Unrecognised store type for '"..from_store.."': "..config[from_store].type); |
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80 end |
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81 if not config[to_store].type then |
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82 have_err = true; |
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83 print("Error: Output store type not specified in the config file"); |
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84 elseif not pcall(require, "migrator."..config[to_store].type) then |
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85 have_err = true; |
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86 print("Error: Unrecognised store type for '"..to_store.."': "..config[to_store].type); |
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87 end |
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88 |
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89 if have_err then |
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90 print(""); |
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91 print("Usage: "..arg[0].." FROM_STORE TO_STORE"); |
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92 print("If no stores are specified, 'input' and 'output' are used."); |
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93 print(""); |
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94 print("The available stores in your migrator config are:"); |
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95 print(""); |
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96 for store in pairs(config) do |
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97 print("", store); |
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98 end |
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99 print(""); |
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100 os.exit(1); |
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101 end |
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102 |
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103 local itype = config[from_store].type; |
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104 local otype = config[to_store].type; |
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105 local reader = require("migrator."..itype).reader(config[from_store]); |
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106 local writer = require("migrator."..otype).writer(config[to_store]); |
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107 |
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108 local json = require "util.json"; |
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109 |
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110 for x in reader do |
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111 --print(json.encode(x)) |
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112 writer(x); |
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113 end |
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114 writer(nil); -- close |
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115 |