NML - a Newgrf Meta Language

[planetmaker]

Not necessarily.

[Timaperm]

It is more convenient to me through Linux ubuntu to make.

[Sunmannus]

hi, anyone kindly enough to provide me a win32 build of nml 0.5.X ?. I want to try some of its new features (16-cargo industry support) but I'm unable to compile it myself.

Many thanks

[Alberth]

It's a Python program, so you can just take the NML source, get a Python3 interpreter, and run the code.

[Sunmannus]

It's a Python program, so you can just take the NML source, get a Python3 interpreter, and run the code.

nml.png (5.29 KiB) Viewed 3140 times

I think I managed to install it, but... ehmm, I'm not sure how to use it now.


I have to move my entire newgrf project folder to this directory from now on?
Also, I have to re-install it every time? I mean, write the

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pip3 install nml

&

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python setup.py install

commands before each session?

Sorry for bothering you

[Alberth]

I think I managed to install it, but... ehmm, I'm not sure how to use it now.

The most basic form is to specify an .nml file that you want compiled, as in

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python the/path/to/nmlc something.nml

If the nml code is correct, this will give you a .grf file.
nml has more options to steer it, try "nmlc --help" for more options you can specify (although most are quite exotic except for the --grf option, but you get that by default already, no need to specify it).

Obviously, typing that "python the/path/to/nmlc something.nml" commandline everytime you want to compile an nml file is a hassle, so make a .bat file with that line in it, and run that .bat file instead. If you have spaces in filenames or paths with spaces in them, surround them with double quotes (or remove the spaces from the name). Nowadays, Windows has powershell as well, so that is another way to achieve less typing. No clue how that works though, last time I used a Windows system was in the previous century.

The "pip" and "python setup install" commands are for installing the stuff, you only need to do that once (I have no idea what it does at a Windows system, but Python tends to have adequate docunentation, so try your chances there if you want to know.)

[planetmaker]

As a quick summary as to what currently should get you going with NML, also on windows as on any other system:

NML is a python programme and as such does not need being compiled for any operating system - you will always be fine by installing python on your system and then executing setup.py from the nml repository. See also the three posting above here

Basically:

1. Install python3.6 or later
2. download NML source repository
3. install libraries:
   • python -m pip install pillow
   • python -m pip install ply
4. optionally install NML as administrator from command line: python setup.py install
5. execute nml from command line: python the/path/to/nmlc something.nml

[Gadg8eer]

As a quick summary as to what currently should get you going with NML, also on windows as on any other system:

NML is a python programme and as such does not need being compiled for any operating system - you will always be fine by installing python on your system and then executing setup.py from the nml repository. See also the three posting above here

Basically:

1. Install python3.6 or later
2. download NML source repository
3. install libraries:
   • python -m pip install pillow
   • python -m pip install ply
4. optionally install NML as administrator from command line: python setup.py install
5. execute nml from command line: python the/path/to/nmlc something.nml

This is an example, in case someone needs to know how to do that last step...

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python C:\TTDTools\NML\nmlc C:\TTDTools\GRFs\GRRS\source\src\grrs.nml

[stefino_cz]

Hi,
I still need a help with NML instalation. I'm able to start command

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setup.py install

but in the end I get information that libraries are not installed. So I tried start cmd, moved to NML master folder and set

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python -m pip install pillow
or
python -m pip install ply

But no result. The first what I know is, that

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python setup.py install
...do nothing but
setup.py install
...works with an error in the end

In case of python -m pip... I get no result (nothing happen) or information that it is unknown command (I think-not sure now). SO I think that the problem is in python but I don't know what I do wrong.

I installed python v 3.7.4 for Win 64bit. Thanks for the help

[Szurke]

Hi guys!

Is already planned in NML for road- and railtypes can do nearby tile request too? Bw: nearby_tile_class. When don't, than pleas do it! THX

[stefino_cz]

Hi, I need help with part of industry code. When I try to compile it, this error appears

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nmlc ERROR: "CZTR_INDUSTRY.nml", line 2052: Syntax error, unexpected token "0"

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//Global bonuses

2051 //Option 1 (one year production)
2052 produce(produce_bonus_1, 0, 0, 0, current_year /100, 0);
2053
2054 //Option 2 (gradual processing)
2055 produce(produce_bonus_2,
2056 max(waiting_cargo_1 / 10, 45), max(waiting_cargo_1 / 10, 45), max(waiting_cargo_2 / 10, 45),
2057 min(waiting_cargo_1, max(waiting_cargo_1 / 10, 16)) + min(waiting_cargo_1, max(waiting_cargo_1 / 10, 16)) + min(waiting_cargo_2, max(waiting_cargo_2 / 10, 16)),
0);

//Option 3 (combination)
produce(produce_bonus_3, max(16, waiting_cargo_1 / 10), max(16, waiting_cargo_2 / 10), 0, 10 + ( ( current_year - 1850 ) /15 ) + 2*(min(16, waiting_cargo_1)) + 2*(min(16, waiting_cargo_2)), 0);

Have somebony any idea where is the problem? It's interesting that with old NML compilator it works so it seems that there is some new feature?

thanks

[2TallTyler]

Are you using NML 0.5? The syntax for the Produce block now requires square brackets which weren't present in 0.4 and before.

[stefino_cz]

Are you using NML 0.5? The syntax for the Produce block now requires square brackets which weren't present in 0.4 and before.

Yeah, this is the problem. Thnaks a lot

[Chrill]

I've updated the first post to link here instead:
https://github.com/OpenTTD/nml/releases