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glilypond — integrate lilypond parts into groff


glilypond [ options] [-] [--] [ filespec ....]


glilypond transforms sheet music written in the lilypond language into the groff(7)
language using the .PSPIC request, such that groff(1) can transform it into a format that
can be displayed directly.

Files in groff language and standard input can be provided as arguments.


Breaking Options
Print help or usage information, then leave the program.

Print version information.

Print license information.

Options for building EPS Files
Here the lilypond program creates eps files directly. This is the default.

The program glilypond generates a pdf file using lilypond. Then the eps file is
generated by pdf2ps and ps2epsR.

Directories and Files
-e|--eps_dir directory_name
Normally all EPS files are sent to the temporary directory. With this option, you
can generate your own directory, in which all useful EPS files are send. So at
last, the temporary directory can be removed.

-p|--prefix begin_of_name
Normally all temporary files get names that start with the ly.... prefix. With
this option, you can freely change this prefix.

Normally all temporary files without the eps files are deleted. With this option,
all generated files either by the lilypond program or other format transposers are

-t|--temp_dir dir
With this option, you call a directory that is the base for the temporary
directory. This directory name is used as is without any extensions. If this
directory does not exist it is be created. The temporary directory is created by
Perl's security operations directly under this directory. In this temporary
directory, the temporary files are stored.

-o|--output file_name
Normally all groff output of this program is sent to STDOUTR. With this option,
that can be changed, such that the output is stored into a file named in the option
argument file_name.

A lot more of information is sent to STDERR.

Short Option Collections
The argument handling of options

Short options are arguments that start with a single dash -. Such an argument can consist
of arbitrary many options without option argument, composed as a collection of option
characters following the single dash.

Such a collection can be terminated by an option character that expects an option
argument. If this option character is not the last character of the argument, the
following final part of the argument is the option argument. If it is the last character
of the argument, the next argument is taken as the option argument.

This is the standard for POSIX and GNU option management.

For example,

-kVe some_dir
is a collection of the short options -k and -V without option argument, followed by
the short option -e with option argument that is the following part of the argument
some_dir. So this argument could also be written as several arguments -k -V -e

Handling of Long Options
Arguments that start with a double dash -- are so-called long options R . Each double
dash argument can only have a single long option.

Long options have or have not an option argument. An option argument can be the next
argument or can be appended with an equal sign = to the same argument as the long option.

--help is a long option without an option argument.

--eps_dir some_dir
is the long option --eps_dir with the option argument some_dir.

Moreover the program allows abbreviations of long options, as much as possible.

The long option --keep_all can be abbreviated from --keep_al up to --k because the program
does not have another long option whose name starts with the character k.

On the other hand, the option --version cannot be abbreviated further than --vers because
there is also the long option --verbose that can be abbreviated up to --verb.

An option argument can also be appended to an abbreviation. So is --e=some_dir the same
as --eps_dir some_dir.

Moreover the program allows an arbitrary usage of upper and lower case in the option name.
This is Perl style.

For example, the long option --keep_all can as well be written as --Keep_All or even as an
abbreviation like --KeE.


An argument that is not an option or an option argument is called a filespec argument.

Without any filespec argument, standard input is read.

Each filespec argument must either be the name of a readable file or a dash - for standard
input. Each input must be written in the roff or groff language and can include lilypond

Normally arguments starting with a dash - are interpreted as an option. But if you use an
argument that consists only of a doubled dash -- R , all following arguments are taken as
filespec argument, even if such an argument starts with a dash. This is handled according
to the GNU standard.


Integrated Lilypond Codes
A lilypond part within a structure written in the groff language is the whole part between
the marks
.lilypond start
.lilypond end

A groff input can have several of these lilypond parts.

When processing such a lilypond part between .lilypond start and .lilypond end we say that
the glilypond program is in lilypond mode.

These lilypond parts are sent into temporary lilypond files with the file name extension
.ly. These files are transformed later on into EPS files.

Inclusion of ly-Files
An additional command line for file inclusion of lilypond files is given by
.lilypond include file_name
in groff input. For each such include command, one file of lilypond code can be included
into the groff code. Arbitrarily many of these commands can be included in the groff

These include commands can only be used outside the lilypond parts. Within the lilypond
mode, this inclusion is not possible. So .lilypond include may not be used in lilypond
mode, i.e. between .lilypond start and .lilypond end. These included ly-files are also
transformed into EPS files.


By the transformation process of lilypond parts into EPS files, there are many files
generated. By default, these files are regarded as temporary files and as such stored in
a temporary directory.

This process can be changed by command line options.

Command Line Options for Directories
The temporary directory for this program is either created automatically or can be named
by the option -t|--temp_dir dir.

Moreover, the EPS files that are later on referred by .PSPIC command in the final groff
output can be stored in a different directory that can be set by the command line option
-e|--eps_dir directory_name. With this option, the temporary directory can be removed
completely at the end of the program.

The beginning of the names of the temporary files can be set by the command line option
[-p |] begin_of_name.

All of the temporary files except the EPS files are deleted finally. This can be changed
by setting the command line option [-k |] With this, all temporary files and directories
are kept, not deleted.

These EPS files are stored in a temporary or EPS directory. But they cannot be deleted by
the transformation process because they are needed for the display which can take a long


Mode ly2eps
This mode is the default. It can also be chosen by the option --ly2eps.

In this mode, the .ly files are transformed by the lilypond program into many files of
different formats, including eps files, using
$ lilypond --ps -dbackend=eps -dgs-load-fonts --output=file-name
for each .ly file. The output file-name must be provided without an extension, its
directory is temporary.

There are many EPS files created. One having the complete transformed ly file, named

Moreover there are EPS files for each page, named file-name-digit.eps.

The last step to be done is replacing all lilypond parts by the collection of the
corresponding EPS page files. This is done by groff commands
.PSPIC file-name-digit.eps

Mode pdf2eps
This mode can be chosen by the option --pdf2eps.

In this mode, the .ly files are transformed by the lilypond(1) program into pdf files,
lilypond --pdf --output=file-name
for each .ly file. The file-name must be provided without the extension .pdf. By this
process, a file file-name.pdf is generated.

The next step is to transform these PDF files into a PS file. This is done by the
pdf2ps(1) program using
$ pdf2ps file-name .pdf file-name .ps
The next step creates an EPS file from the PS file. This is done by the ps2eps(1) program
$ ps2eps file-name.ps

By that, a file file-name.eps is created for each lilypond part in the groff file or
standard input.

The last step to be done is replacing all lilypond parts by the groff command
.PSPIC file-name.eps


The new groff(7) structure generated by glilypond is either

1) sent to standard output and can there be saved into a file or piped into groff(1)
or groffer(1) or

2) stored into a file by given the option -o | --output file_name

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