tools/migration: Rename main.lua -> prosody-migrator.lua and update the Makefile

1 files changed, 115 insertions, 0 deletions

diff --git a/tools/migration/prosody-migrator.lua b/tools/migration/prosody-migrator.lua
new file mode 100644
index 00000000..82eeab9d
--- /dev/null
+++ b/tools/migration/prosody-migrator.lua
@@ -0,0 +1,115 @@
+#!/usr/bin/env lua
+
+CFG_SOURCEDIR=os.getenv("PROSODY_SRCDIR");
+CFG_CONFIGDIR=os.getenv("PROSODY_CFGDIR");
+
+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
+if not config[from_store].type then
+	have_err = true;
+	print("Error: Input store type not specified in the config file");
+elseif not pcall(require, "migrator."..config[from_store].type) then
+	have_err = true;
+	print("Error: Unrecognised store type for '"..from_store.."': "..config[from_store].type);
+end
+if not config[to_store].type then
+	have_err = true;
+	print("Error: Output store type not specified in the config file");
+elseif not pcall(require, "migrator."..config[to_store].type) then
+	have_err = true;
+	print("Error: Unrecognised store type for '"..to_store.."': "..config[to_store].type);
+end
+
+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";
+
+for x in reader do
+	--print(json.encode(x))
+	writer(x);
+end
+writer(nil); -- close
+