Re: python-ly, ly.indent

[mason]

Thanks Urs,

Seeing how the Document and Cursor classes are used there was enough to
put me on the right track. I've achieved what I was going for with this:

%%% begin test.py %%%
import ly.document
import ly.indent

music = '''\\new Staff <<
\\relative c' { c4 c c c } |
>>>'''

d = ly.document.Document(music)
c = ly.document.Cursor(d)
i = ly.indent.Indenter()

c.select_all()
i.indent(c)

print (d.plaintext())
%%% end test.py %%%

$ python3 test.py
\new Staff <<
  \relative c' { c4 c c c } |
>>>

Best,

Mason

On 08/17, Urs Liska wrote:
> Just shortly: does
> 
> https://github.com/frescobaldi/python-ly/blob/master/ly/cli/main.py
> 
> and
> 
> https://github.com/frescobaldi/python-ly/blob/master/ly/cli/command.py#L116
> 
> help you further? I thought it would be best to look how the ly command line 
> program does it.
> 
> Urs
> 
> 
> Am 17. August 2019 03:00:47 MESZ schrieb address@hidden:
> >Hi all,
> >
> >The command line tools provided by python-ly are very
> >convenient and easy to use, but I'm finding it a little harder to wrap
> >my head around the Python module.
> >
> >For example, it is easy to automatically indent a file with
> >
> >$ ly "indent" file.ly
> >
> >or to indent the output of another command such as
> >
> >$ cat file.ly | ly "indent"
> >
> >I'd like to be able to do something similar in Python, using ly.indent
> >to indent files or (preferably) strings. It seems that ly.indent might
> >be what I want, but I'm having trouble figuring out how it works. The
> >Indenter() class, with an indent() function, is defined here,[1] but
> >I'm
> >don't understand what a cursor object is or how to create and pass one.
> >I next tried looking through Frescobaldi's code for example usage and
> >found this,[2] but I think I would need to learn more about how
> >Frescobaldi works in order to follow what's happening, which is deeper
> >than I want to go to indent a string of Lilypond code.
> >
> >Is there a simple way to use ly.indent similarly to `ly "indent"`, or
> >would I be better off invoking `ly "indent"` externally with
> >os.system()?
> >
> >Thanks,
> >
> >Mason
> >
> >[1]
> >https://github.com/frescobaldi/python-ly/blob/0d91ca2450ba01a8158f53ba05202af3e13bf78d/ly/indent.py
> >
> >[2]
> >https://github.com/frescobaldi/frescobaldi/blob/09cae764126b505dedf0182beccd78d7934b2de4/frescobaldi_app/indent.py
> 
> -- 
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