aboutsummaryrefslogtreecommitdiffstats
path: root/tools/migration/prosody-migrator.lua
blob: 2a8bf1c3d445eadae87b046c713df327e838601a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
#!/usr/bin/env lua

CFG_SOURCEDIR=os.getenv("PROSODY_SRCDIR");
CFG_CONFIGDIR=os.getenv("PROSODY_CFGDIR");

-- Substitute ~ with path to home directory in paths
if CFG_CONFIGDIR then
        CFG_CONFIGDIR = CFG_CONFIGDIR:gsub("^~", os.getenv("HOME"));
end

if CFG_SOURCEDIR then
        CFG_SOURCEDIR = CFG_SOURCEDIR:gsub("^~", os.getenv("HOME"));
end

local default_config = (CFG_CONFIGDIR or ".").."/migrator.cfg.lua";

-- Command-line parsing
local options = {};
local handled_opts = 0;
for i = 1, #arg do
	if arg[i]:sub(1,2) == "--" then
		local opt, val = arg[i]:match("([%w-]+)=?(.*)");
		if opt then
			options[(opt:sub(3):gsub("%-", "_"))] = #val > 0 and val or true;
		end
		handled_opts = i;
	else
		break;
	end
end
table.remove(arg, handled_opts);

-- Load config file
local function loadfilein(file, env)
	if loadin then
		return loadin(env, io.open(file):read("*a"));
	else
		local chunk, err = loadfile(file);
		if chunk then
			setfenv(chunk, env);
		end
		return chunk, err;
	end
end

local config_file = options.config or default_config;
local from_store = arg[1] or "input";
local to_store = arg[2] or "output";

config = {};
local config_env = setmetatable({}, { __index = function(t, k) return function(tbl) config[k] = tbl; end; end });
local config_chunk, err = loadfilein(config_file, config_env);
if not config_chunk then
	print("There was an error loading the config file, check the file exists");
	print("and that the syntax is correct:");
	print("", err);
	os.exit(1);
end

config_chunk();

if CFG_SOURCEDIR then
	package.path = CFG_SOURCEDIR.."/?.lua;"..package.path;
	package.cpath = CFG_SOURCEDIR.."/?.so;"..package.cpath;
elseif not package.loaded["util.json"] then
	package.path = "../../?.lua;"..package.path
	package.cpath = "../../?.so;"..package.cpath
end

local have_err;
if #arg > 0 and #arg ~= 2 then
	have_err = true;
	print("Error: Incorrect number of parameters supplied.");
end
if not config[from_store] then
	have_err = true;
	print("Error: Input store '"..from_store.."' not found in the config file.");
end
if not config[to_store] then
	have_err = true;
	print("Error: Output store '"..to_store.."' not found in the config file.");
end

function load_store_handler(name)
	local store_type = config[name].type;
	if not store_type then
		print("Error: "..name.." store type not specified in the config file");
		return false;
	else
		local ok, err = pcall(require, "migrator."..store_type);
		if not ok then
			if package.loaded["migrator."..store_type] then
				print(("Error: Failed to initialize '%s' store:\n\t%s")
					:format(name, err));
			else
				print(("Error: Unrecognised store type for '%s': %s")
					:format(from_store, store_type));
			end
			return false;
		end
	end
	return true;
end

have_err = have_err or not(load_store_handler(from_store, "input") and load_store_handler(to_store, "output"));

if have_err then
	print("");
	print("Usage: "..arg[0].." FROM_STORE TO_STORE");
	print("If no stores are specified, 'input' and 'output' are used.");
	print("");
	print("The available stores in your migrator config are:");
	print("");
	for store in pairs(config) do
		print("", store);
	end
	print("");
	os.exit(1);
end
	
local itype = config[from_store].type;
local otype = config[to_store].type;
local reader = require("migrator."..itype).reader(config[from_store]);
local writer = require("migrator."..otype).writer(config[to_store]);

local json = require "util.json";

io.stderr:write("Migrating...\n");
for x in reader do
	--print(json.encode(x))
	writer(x);
end
writer(nil); -- close
io.stderr:write("Done!\n");