@c -*-texinfo-*-

@ignore

TODO: cleanup

** AARGH.e We also have tutorial.itely: Integrating text and music.

   Could also do with a cleanup.  Lost inspiration to fix this manual
   where to describe what?

@end ignore

@c @node Merging text and music with lilypond-book
@c @chapter Merging text and music with lilypond-book

@c  fix this node name , this is too long.

@node Insert music snippets into your texts using lilypond-book
@chapter Insert music snippets into your texts using lilypond-book

If you want to add pictures of music to a document, you can simply do
it the way you would do with other types of pictures.  You write
LilyPond code, process it separately to embedded PostScript or
@code{png}, and include it as a picture into your La@TeX{} or
@code{html} source.

@command{lilypond-book} provides you with a way to automate this
process: this program will extract snippets of music from your
document, run lilypond on them, and substitute the resulting pictures
back. This works for La@TeX{}, @code{html} or texinfo documents.
@code{lilypond-book} introduces some extra LilyPond specific
constructs, that integrate seamlessly with the rest of your source
document.

@cindex texinfo
@cindex latex
@cindex texinfo
@cindex @code{texi}
@cindex html
@cindex documents, adding music to


More precisely, if a La@TeX{}  file contains
@example 

        \begin@{lilypond@}
        CONTENTS
        \end@{lilypond@}
 
@end example
or
@example
        \lilypond@{CONTENTS@}
@end example
then LilyPond is run on CONTENTS.  @command{lilypond-book} puts the
result back into the latex file. When you run the result through latex,
you get a document that mixes text and music.  lilypond-book will insert
line width and font size definitions before @code{CONTENTS}, so the
music samples will match the layout of your document.

Very often, if you mix music and text, the music is only a few
notes or at most a few bars. This music should be as short as possible
and not stretched to be aligned to the right margin. lilypond-book does
this automatically if you don't use a @code{\score} block in
@code{CONTENTS}. For example: @code{\lilypond@{\context Voice <c' e' g'>
@}}.

You can also use @code{lilypondfile} to include another file:
@example
        \lilypondfile@{foo.ly@}
@end example

All three forms can take several options. They are specified in brackets
as follows:
@example
       \lilypondfile[options, go, here]@{ ..  @}
       \begin[options, go, here]@{lilypond@} .. \end@{lilypond@}
       \lilypond[options, go,here]@{ .. @}
@end example

In the Texinfo version, bitmaps of the music are also generated, so you
can make a HTML document with embedded music.


@section Texinfo reference

You specify the LilyPond code like this:
@example
@@lilypond[options, go, here]
  YOUR LILYPOND CODE
@@end lilypond
@@lilypond[option, go, here]@{ YOUR LILYPOND CODE @}
@@lilypondfile[options, go,here]@{@var{filename}@}
@end example

We show two simple examples here. First a complete block:
@example
@@lilypond[26pt]
c' d' e' f' g'2 g'
@@end lilypond
@end example

produces this music:
@lilypond
c' d' e' f' g'2 g'
@end lilypond

Then the short version:
@example
@@lilypond[11pt]@{<c' e' g'>@}
@end example

and its music:

@lilypond[11pt]{<c' e' g'>}

@command{lilypond-book} knows the default margins, and a few paper
sizes. One of these commands should be in the beginning of the document:
@itemize @bullet
@item @code{@@afourpaper}
@item @code{@@afourlatex}
@item @code{@@afourwide}
@item @code{@@smallbook}
@end itemize
@code{@@pagesizes} are not yet supported.

@section La@TeX{} reference

You specify the LilyPond code like this:
@example
\begin[option, go, here]@{lilypond@}
 YOUR LILYPOND CODE
\end@{lilypond@}
@end example

@example
\lilypondfile[options, go,here]@{@var{filename}@}
@end example
or 
@example
\lilypond@{ YOUR LILYPOND CODE @}
@end example

We show some examples here.

@example
\begin[26pt]@{lilypond@}
c' d' e' f' g'2 g'2
\end@{lilypond@}
@end example

produces this music:

@lilypond[26pt]
c' d' e' f' g'2 g'2
@end lilypond

Then the short version:
@example
\lilypond[11pt]@{<c' e' g'>@}
@end example

and its music:

@lilypond[11pt]{<c' e' g'>}


You can use whatever commands you like in the document preamble,
that is the part of the document before @code{\begin@{document@}}.
@command{lilypond-book} will send it to La@TeX{} to find out how wide
the text is and adjust the linewidth variable in the paper definition of
you music according to that.

After @code{\begin@{document@}} you must be a little more careful
when you use commands that change the width of the text and how
many columns there are. @command{lilypond-book} know about the
@code{\onecolumn} and @code{\twocolumn} commands and the @code{multicols}
environment from the multicol package.

The music will be surrounded by @code{\preLilypondExample} and
@code{\postLilypondExample}. The variables are 
defined to nothing by default, and the user can redefine them
to whatever he wants.


@section HTML reference

You specify the LilyPond code like this:

@quotation
@example
<lilypond relative1 verbatim>
  \key c \minor r8 c16 b c8 g as c16 b c8 d | g,4
</lilypond> 
@end example
@end quotation

produces

@quotation
@example
<lilypond relative1 verbatim>
  \key c \minor r8 c16 b c8 g as c16 b c8 d | g,4
</lilypond> 
@end example
@lilypond[relative1]
  \key c \minor r8 c16 b c8 g as c16 b c8 d | g,4
@end lilypond
@end quotation

Inline picture:

@quotation
@example
Some music in <lilypond a b c/> a line of text.
@end example
@end quotation

@c Huh? ugh, can't show inline pictures in texinfo?

@c Some music in @lilypond{a b c} a line of text.



@section Options

@table @code
@item eps
This will create the music as eps graphics and include it into the
document with the @code{\includegraphics} command. It works in
La@TeX{} only.

This enables you to place music examples in the running text (and not in
a separate paragraph). To avoid that La@TeX{} places the music on a line
of its own, there should be no empty lines between the normal text and
the LilyPond environment. For inline music, you probably also need a
smaller music font size (eg. 11 pt or 13 pt) 


@item verbatim
    CONTENTS is copied into the source enclosed in a verbatim block,
    followed by any text given with the @code{intertext} option, then
    the actual music is displayed. This option does not work with
    the short version of the LilyPond blocks:

    @code{ @@lilypond@{ CONTENTS @} } and @code{ \lilypond@{ CONTENTS @} }

@item smallverbatim
      like @code{verbatim}, but in a smaller font.

@item intertext="@var{text}"
    Used in conjunction with @code{verbatim} option: this puts
@var{text} between the code and the music.
@item filename="@var{filename}"
    Save the LilyPond code to @var{filename}. By default, a hash value
of the code is used.

@item @code{11pt}
@lilypond[11pt, eps]
  \relative c'{
    r16 [c d e][f d e c] [g'8 c][b-\prall c] |
    [d16 g, a b][c a b g][d'8 g f-\prall g]
  }
@end lilypond
@item @code{13pt}
@lilypond[13pt, eps]
  \relative c'{
    r16 [c d e][f d e c] [g'8 c][b-\prall c] |
    [d16 g, a b][c a b g][d'8 g f-\prall g]
  }
@end lilypond
@item @code{16pt}
@lilypond[16pt, eps]
  \relative c'{
    r16 [c d e][f d e c] [g'8 c][b-\prall c] |
    [d16 g, a b][c a b g][d'8 g f-\prall g]
  }
@end lilypond
@item @code{20pt}
@lilypond[20pt, eps]
  \relative c'{
    r16 [c d e][f d e c] [g'8 c][b-\prall c] |
    [d16 g, a b][c a b g][d'8 g f-\prall g]
  }
@end lilypond
@item @code{26pt}
@lilypond[26pt, eps]
  \relative c'{
    r16 [c d e][f d e c] [g'8 c][b-\prall c] |
  }
@end lilypond

@item singleline
  Produce a single naturally spaced, unjustified line. (i.e.: linewidth = -1).
@item multiline
  The opposite of @code{singleline}: justify and break lines.
@item linewidth=@var{size}@var{unit}
    Set linewidth to @var{size}, where @var{unit} = cm, mm, in or pt.
@item fragment
@item nofragment
    Override @command{lilypond-book} auto detection of what type of code is in the
    LilyPond block, voice contents or complete code.
@item indent=@var{size}@var{unit}
    Set first line indent to @var{size}, where @var{unit} = cm, mm, in or pt.
@item noindent
    Set first line indent to zero.
@item printfilename
    Prints the file name before the music example. Useful in conjunction
with @code{\lilypondfile}.
@item relative, relative @var{N}
    Use relative octave mode. By default, notes are specified relative 
    central C. The optional integer argument specifies how many octaves 
    higher (positive number) or lower (negative number) to place the 
    starting note.
@end table

@section Invocation

When you run @command{lilypond-book} it will generate lots of small
files that LilyPond will process. So to avoid all the garbage in
your source directory, you should either change to a temporary
directory, or use the @code{--outdir} command line options:

@code{cd out && lilypond-book ../yourfile.tex}

@code{lilypond-book --outdir=out yourfile.tex}


For latex input, the file to give to latex has extension @file{.latex}.
Texinfo input will be written to a file with extension @file{.texi}.

If you use @code{--outdir}, you should also @code{cd} to that directory
before running LaTeX or makeinfo. This may seem a little kludgey, but
both Latex and makeinfo expect picture files (the music) to be in the
current working directory. Moreover, if you do this, LaTeX will not
clutter you normal working directory  with output files.

@cindex titling and lilypond-book
@cindex lilypond-book and titling
@cindex \header in LaTeX documents

If you want to add titling from the @code{\header} section of the
files, you should add  the following to the top of your LaTeX
@example
\input titledefs.tex
\def\preLilypondExample@{\def\mustmakelilypondtitle@{@}@}
@end example

lilypond-book accepts the following command-line options: 
@table @code
@item @option{-f}, @option{--format=}
    Specify the document type to process: @code{html}, @code{latex} or
@code{texi} (default).  @command{lilypond-book} usually figures this
out automatically.
@item --default-music-fontsize=@var{sz}pt
    Set the fontsize to use for LilyPond if no fontsize is given
    as option.
@item --force-music-fontsize=@var{sz}pt
    Force all LilyPond to use this fontsize, overriding options
    given to @code{\begin@{lilypond@}}
@item -I @var{DIR}, --include=@var{DIR}
    Add @var{DIR} to the include path.
@item -M, --dependencies
        Write dependencies to @file{filename.dep}
@item --dep-prefix=@code{PREF}
        prepend @code{PREF} before each @code{-M} dependency
@item -n, --no-lily
        don't run LilyPond, but do generate the @code{.ly} files
@item --no-music
        strip all  LilyPond blocks from the file.
@item --no-pictures
        don't generate pictures when processing Texinfo.
@item --read-lys
        don't write ly files. This way you can do
@example
 lilypond-book file.tely
 convert-ly
 lilypond-book --read-lys
@end example

[TODO not a useful option unless you can undump the input file]

@item --outname=@var{FILE}
    The name of La@TeX{} file to output. If this option  is not given,
    the output name is derived from the input name.
@item --outdir=@var{DIR}
         place generated files in @var{DIR}.
@item --version
        print version information
@item --help
        Print a short help message
@end table


@section Bugs
  
The La@TeX{} \includeonly@{...@} command is ignored.

The Texinfo command @code{pagesize} is on the TODO list for LilyPond
1.6, but changing the linewidth in other ways will not give you a
straight right margin.

Almost all La@TeX{} commands that change margins and line widths are
ignored.

There is no way to automatically apply convert-ly to fragments inside a
lilypond-book file.

@file{lilypond-book} processes all music fragments in one big run. The
state of the GUILE interpreter is not reset between fragments; this
means that GUILE definitions, eg. done with @code{#(define .. )} and
@code{#(set! .. )} can leak from one fragment into a next fragment.