[erlang-questions] Erlang executable that reads command line arguments

Éric Pailleau <>
Fri Oct 16 19:25:47 CEST 2015


Hi,
You have to add path to modules used in Emu Args.   -pz getopt/ebin   etc...

Le 16 oct. 2015 01:41, Frederic BONFANTI <> a écrit :
>
> Hi,
>
> I'm getting weird error message when calling my escript from within a Python script
>
>> escript: exception error: undefined function getopt:parse/2
>>
> From the shell a standalone script works just fine... any idea ?
>
> This is how I generate the escripted version of myapp :
>
>> #!/usr/bin/env escript
>> %% -*- erlang -*-
>> %%! -smp enable -sname make_myapp
>> main(_) -> {ok, SourceCode} = file:read_file("myapp.erl"),
>> {ok, _, BeamCode} = compile:file("myapp.erl", [binary, debug_info]),
>> {ok, _, GetOpt} = compile:file("getopt.erl", [binary, debug_info]),
>> escript:create("myapp", [shebang, {archive, [
>> {"myapp.erl", SourceCode},
>> {"myapp.beam", BeamCode},
>> {"getopt.beam",GetOpt}],
>> []}
>> ]).
>>
> Thanks in advance
>
>> On Oct 11, 2015, at 5:40 AM, Dmitry Kolesnikov <> wrote:
>>
> And if you are using rebar and you have deps to other projects you might add following lines to rebar.config
>
> {escript_incl_apps, [ getopt
>
> ]}.
>
>  {escript_emu_args, "%%! +K true +P 10000000\n"}.
>
> Sad story, I've not figure out how to add erlang runtime to same package. Anyone, who receives you script needs to have one.
>
> Best Regards,
> Dmitry
> >-|-|-(*>
>
> On 11 Oct 2015, at 08:46, Frederic BONFANTI <> wrote:
>
>> Hi guys,
>>
>> given a simple Erlang code that consists in one file, let’s say test123.erl , I’d like to 
>>
>> 1. use a Makefile to compile test123.erl into test.beam and then generate a distributable version of test123 (executable)
>>
>> 2. figure-out how to parse the command line arguments once this test command is called from regular shell, for example:
>>        
>>        test123 -A -x 555
>>
>> If there are straightforward examples available, that will do.
>>
>> Thanks in advance
>>
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>> 
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>
>


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