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Main author: [Fr. Jacques Peron](mailto:cataclop@hotmail.com)\nThis material is subject to the MIT license.\n
# Lyluatex
## Usage

In the preable of your document, include the package `lyluatex`:

```TeX
\usepackage{lyluatex}
```

The `program` option permits the definition of an alternative path to
`lilypond`, for example:

```TeX
\usepackage[program=/opt/lilypond-dev/lilypond]{lyluatex}
```

Thereafter, you can include a lilypond file with the command:

```TeX
\lilypondfile[staffsize=17]{PATH/TO/THE/FILE}
```

The argument `staffsize`, which is optional, changes the size of the score.
You can change the size for all the subsequent scores in a document by
placing the following command before your first include statement to be so
affected:

```TeX
\setluaoption{ly}{staffsize}{24}
```

Next, you simply need to compile the document normally with the command
`lualatex -shell-escape`:

```bash
lualatex -shell-escape DOCUMENT.TEX
```

Another "more secure" option is to add `lilypond` and `gs` to default
allowed commands:

```bash
shell_escape_commands=$(kpsewhich -expand-var '$shell_escape_commands'),lilypond,gs lualatex DOCUMENT.TEX
```

On systems with low RAM, when working on big documents, you could encounter
*buffer overflows* in `lilypond` calls.  In that case, first compile with
luatex's command line option `--draftmode` to generate all LilyPond output
snippets, then compile again without this option to generate the output PDF.

You can also input music directly into your document with the `lilypond`
environment.  This is only recommended for relatively short snippets.  For
example:

```TeX
\begin{lilypond}
\relative c' { c d e f g a b c }
\end{lilypond}
```

Finally, for truly short snippets, there is also the `\lily` command.
Example:

```TeX
\lilypond[staffsize=12]{c' d' g'}
```

**Nota bene:** The `\lilypond` command *does not* support blocks of LilyPond
code with explicit `\score` blocks.  Such code must be included with the
`lilypond` environment or as a separate file.

## Migration from `lilypond-book`

In order to facilitate the migration from `lilypond-book`, `\lilypondfile`,
the environment `lilypond` and the command `\lilypond` should work nearly as
with `lilypond-book`; for even more identical behaviour, call `lyluatex`
as follows:

```TeX
\usepackage[program=/opt/lilypond-dev/lilypond]{lyluatex}
```

That way, documents typeset with `lilypond-book` can be adapted to use
`lyluatex` without much difficulty.

# Credits

See [Contributors.md](Contributors.md).

# Contributing

If you want improvements or encounter an error, do not hesitate to to report
the [issue](https://github.com/jperon/lyluatex/issues).  If you have
programming skills, you may also propose your changes via a [pull
request](https://github.com/jperon/lyluatex/pulls).

This extension is and will remain free; if you find it useful and wish to
encourage its development by a [donation](https://www.paypal.me/abjperon),
many thanks!