first commit
This commit is contained in:
Diego Martínez
commit
11b9e0596c
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Internationalization Lib for Minetest
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By Diego Martínez (a.k.a. "Kaeza").
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Released as WTFPL.
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This mod is an attempt at providing internationalization support for mods
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(something Minetest currently lacks).
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How do I use it?
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In order to enable it for your mod, copy the following code snippet and paste
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it at the beginning of your source file(s):
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-- Boilerplate to support localized strings if intllib mod is installed.
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local S
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if (minetest.get_modpath("intllib")) then
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dofile(minetest.get_modpath("intllib").."/intllib.lua")
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S = intllib.Getter(minetest.get_current_modname())
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else
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S = function ( s ) return s end
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end
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Note that by using this snippet, you don't need to depend on `intllib'. In
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fact, the mod's `init.lua' is a no-op; you need to explicitly execute intllib's
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`intllib.lua' file.
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Also note that if the intllib "mod" is not installed, the S() function is
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defined so it returns the string unchanged. This is done so you don't have to
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sprinkle tons of `if's (or similar constructs) to check if the lib is actually
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installed.
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Next, for each "translatable" string in your sources, use the S() function
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(defined in the snippet) to return the translated string. For example:
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minetest.register_node("mymod:mynode", {
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description = S("My Fabulous Node"),
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<...>
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})
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Then, you create a `locale' directory inside your mod directory, with files
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named after the two-letter ISO Language Code of the languages you want to
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support. Here's an example for a Spanish locale file (`es.txt'):
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# Lines beginning with a pound sign are comments and are effectively ignored
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# by the reader. Note that comments only span until the end of the line;
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# there's no support for multiline comments.
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Blank lines not containing an equals sign are also ignored.
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Hello, World! = Hola, Mundo!
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String with\nnewlines and \ttabs = Cadena con\nsaltos de linea y\ttabuladores
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String with an \= equals sign = Cadena con un signo de \= igualdad
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Since there's currently no portable way to detect the language, this library
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tries several alternatives, and uses the first one found:
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- `language' setting in `minetest.conf'
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- `LANG' environment variable (this is always set on Unix-like OSes).
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- Default of "en".
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Note that in any case only up to the first two characters are used, so for
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example, the settings "de_DE.UTF-8", "de_DE", and "de" are all equal.
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Windows users have no `LANG' environment variable by default. To add it, do
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the following:
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- Click Start->Settings->Control Panel.
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- Start the "System" applet.
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- Click on the "Advanced" tab.
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- Click on the "Environment variables" button
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- Click "New".
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- Type "LANG" (without quotes) as name and the language code as value.
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- Click OK until all dialogs are closed.
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Alternatively for all platforms, if you don't want to modify system settings,
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you may add the following line to your `minetest.conf' file:
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language = <language code>
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Also note that there are some problems with using accented, and in general
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non-latin characters in strings. Until a fix is found, please limit yourself
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to using only US-ASCII characters.
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Frequently Asked Questions
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--------------------------
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Q: Were you bored when you did this?
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A: Yes.
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Q: Why are my texts are not translated?
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A: RTFM...or ask in the topic 8-----)
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Q: How come the README is bigger than the actual code?
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A: Because I'm adding silly unfunny questions here...and because there are
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some users that are too lazy to understand how the code works, so I have
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to document things.
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Q: I don't like this sh*t!
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A: That's not a question.
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Thanks for reading up to this point.
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Should you have any comments/suggestions, please post them in the forum topic.
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Let there be translated texts! :P
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--
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Yours Truly,
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Kaeza
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@ -0,0 +1,91 @@
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intllib = { };
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local strings = { };
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local INTLLIB_DEBUG = true;
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local LANG = minetest.setting_get("language") or os.getenv("LANG") or "en";
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LANG = LANG:sub(1, 2);
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local TRACE;
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if (INTLLIB_DEBUG) then
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TRACE = function ( s )
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print("*** DEBUG: "..s);
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end
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else
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TRACE = function ( ) end
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end
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local repr2esc = {
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["n"] = "\n";
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["r"] = "";
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["t"] = "\t";
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["\\"] = "\\";
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["\""] = "\"";
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};
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local esc2repr = {
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["\n"] = "\\n";
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["\r"] = "";
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["\t"] = "\\t";
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["\\"] = "\\\\";
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["\\\""] = "\"";
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};
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local function parse ( s )
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return s:gsub("\\([nrt\"\'\\\\])", function ( c )
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return (repr2esc[c] or c);
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end);
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end
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local function repr ( s )
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return s:gsub("[\n\t\"\'\\\\]", function ( c )
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return (esc2repr[c] or c);
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end);
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end
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local function do_load_strings ( f )
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local msgstr = { };
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for line in f:lines() do
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line = line:trim();
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if ((line ~= "") and (line:sub(1, 1) ~= "#")) then
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local pos = line:find("=", 1, true);
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while (pos and (line:sub(pos - 1, pos - 1) == "\\")) do
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local pos = line:find("=", pos + 1, true);
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end
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if (pos) then
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local msgid = line:sub(1, pos - 1):trim();
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local str = line:sub(pos + 1):trim();
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msgstr[msgid] = parse(str);
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end
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end
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end
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return msgstr;
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end
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function intllib.load_strings ( modname )
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local f, e = io.open(minetest.get_modpath(modname).."/locale/"..LANG..".txt");
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if (f) then
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local strings;
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strings = do_load_strings(f);
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f:close();
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return strings;
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else
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return nil, "Could not load '"..LANG.."' texts: "..e;
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end
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end
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local getters = { };
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function intllib.Getter ( modname )
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if (not modname) then modname = minetest.get_current_modname(); end
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if (not getters[modname]) then
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local msgstr = intllib.load_strings(modname) or { };
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getters[modname] = function ( s )
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return msgstr[repr(s)] or s;
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end;
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end
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return getters[modname];
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end
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@ -0,0 +1,4 @@
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Hello %s!::¡Hola %s!
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Blah blah...\nBlah blah...::Bla bla...\nBla bla...
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Bye!::¡Adios!
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@ -0,0 +1,257 @@
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#! /usr/bin/env lua
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local function listdir ( dir )
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local LS;
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if (os.getenv("WINDIR")) then
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LS = 'dir /b %s';
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else
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LS = 'ls %s';
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end
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local tmp = os.tmpname();
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local r = os.execute(LS:format(dir).." > "..tmp)
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if ((r ~= nil) and (r == 0)) then
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local list = { };
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local f = io.open(tmp);
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if (not f) then
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os.remove(tmp);
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return nil;
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end
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for line in f:lines() do
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list[#list + 1] = line;
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end
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f:close();
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os.remove(tmp);
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return list;
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end
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os.remove(tmp);
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return nil;
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end
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local function StringOutput ( s, file )
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return {
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_buf = (s or "");
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_file = file;
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write = function ( self, ... )
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local spc = false;
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for _, v in ipairs({...}) do
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if (spc) then self._buf = self._buf.." "; end
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spc = true;
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self._buf = self._buf..tostring(v);
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end
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end;
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print = function ( self, ... )
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local spc = false;
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for _, v in ipairs({...}) do
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if (spc) then self._buf = self._buf.." "; end
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spc = true;
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self._buf = self._buf..tostring(v);
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end
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self._buf = self._buf.."\n";
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end;
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tostring = function ( self )
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return self._buf;
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end;
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flush = function ( self, file )
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local f = (file or self._file or io.stdout);
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f:write(self._buf);
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f:flush();
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end;
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};
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end
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local function err_print ( s )
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io.stderr:write((s or "").."\n");
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end
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local function ArgParser ( appname, usageline, description )
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return {
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prefix = ((appname and (appname..": ")) or "");
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description = description;
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options = {
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{ name = "help";
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short = "h";
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long = "help";
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help = "Show this help screen and exit.";
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},
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};
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values = { };
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inputs = { };
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no_exit = (appname == nil);
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add_option = function ( self, name, short, long, has_arg, arg_name, help )
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self.options[#self.options+1] = {
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name = name;
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short = short;
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long = long;
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has_arg = has_arg;
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arg_name = arg_name;
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help = help;
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};
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end;
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parse = function ( self, args, no_exit )
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local opts = { };
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local inputs = { };
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local i = 1;
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while (i <= #args) do
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local a = args[i];
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if (a:sub(1, 1) == '-') then
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local found = false;
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if ((a == "-h") or (a == "--help")) then
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if (no_exit or self.no_exit) then
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return nil, "--help";
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else
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self:show_usage();
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os.exit(0);
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end
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end
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for _, opt in ipairs(self.options) do
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if ((a == "-"..opt.short) or (a == "--"..opt.long)) then
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if (opt.has_arg) then
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i = i + 1;
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if (not args[i]) then
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local msg = self.prefix.."option `"..a.."' requires an argument.";
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if (no_exit) then
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return nil, msg;
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else
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err_print(msg);
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os.exit(-1);
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end
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end
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opts[opt.name] = args[i];
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else
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opts[opt.name] = true;
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end
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found = true;
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break;
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end
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end
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if (not found) then
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local msg = self.prefix.."unrecognized option `"..a.."'. Try `--help'.";
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if (no_exit or self.no_exit) then
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return nil, msg;
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else
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err_print(msg);
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os.exit(-1);
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end
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end
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else
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inputs[#inputs + 1] = a;
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end
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i = i + 1;
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end
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return opts, inputs;
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end;
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show_usage = function ( self, extramsg )
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if (extramsg) then
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err_print(self.prefix..extramsg);
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end
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err_print("Usage: "..appname.." "..(usageline or ""));
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if (self.description) then
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err_print(self.description)
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end
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if (#self.options > 0) then
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err_print("\nAvailable Options:");
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local optwidth = 0;
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local optline = { };
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for _, opt in ipairs(self.options) do
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local sh = (opt.short and "-"..opt.short);
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local ln = (opt.long and "--"..opt.long);
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local sep = (sh and ln and ",") or " ";
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sh = sh or "";
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ln = ln or "";
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if (opt.long and opt.has_arg) then
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ln = ln.." "..opt.arg_name;
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end
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optline[#optline + 1] = sh..sep..ln;
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if (optline[#optline]:len() > optwidth) then
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optwidth = optline[#optline]:len();
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end
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end
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for i, opt in ipairs(self.options) do
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local sep = string.rep(" ", optwidth - optline[i]:len()).." ";
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err_print(" "..optline[i]..sep..opt.help);
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end
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err_print();
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if (self.footer) then
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err_print(self.footer.."\n");
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end
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end
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end;
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};
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end
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local function main ( arg )
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local APPNAME = "findtext.lua";
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local ap = ArgParser(APPNAME, "[OPTIONS] FILES...");
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ap:add_option("output", "o", "output", true, "FILE", "Write translated strings to FILE. (default: stdout)");
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ap:add_option("langname", "l", "langname", true, "NAME", "Set the language name to NAME.");
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ap:add_option("author", "a", "author", true, "NAME", "Set the author to NAME.");
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ap:add_option("mail", "m", "mail", true, "EMAIL", "Set the author contact address to EMAIL.");
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ap.description = "Finds all the strings that need to be localized, by"..
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" searching for things\n like `S(\"foobar\")'.";
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ap.footer = "Report bugs to <lkaezadl3@gmail.com>.";
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local opts, files = ap:parse(arg);
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if (#files == 0) then
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files = listdir("*.lua");
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if ((not files) or (#files == 0)) then
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io.stderr:write(APPNAME..": no input files\n");
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os.exit(-1);
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end
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end
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local buffer = StringOutput();
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buffer:write("\n");
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if (opts.langname) then
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buffer:write("# Language: "..opts.langname.."\n");
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end
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if (opts.author) then
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buffer:write("# Author: "..opts.author);
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if (opts.mail) then
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buffer:write(" <"..opts.mail..">");
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end
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buffer:write("\n");
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end
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if (opts.author or opts.langname) then
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buffer:write("\n");
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end
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for _, file in ipairs(files) do
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local infile, e = io.open(file);
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if (not infile) then
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io.stderr:write(APPNAME..": "..e.."\n");
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os.exit(1);
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end
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for line in infile:lines() do
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local s = line:match('.-S%("([^"]*)"%).*');
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if (s) then
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buffer:write(s.." = \n");
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end
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end
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infile:close();
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end
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local outfile, e;
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if (opts.output) then
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outfile, e = io.open(opts.output, "w");
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if (not outfile) then
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io.stderr:write(APPNAME..": "..e.."\n");
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os.exit(1);
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end
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else
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outfile = io.stdout;
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end
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buffer:flush(outfile);
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if (outfile ~= io.stdout) then
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outfile:close();
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end
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end
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main(arg);
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