The Literate Markdown Tangler (LMT) is a Quarto Extension that provides users with a Pandoc Lua filter to write code in the literate programming framework.
If you use Quarto, you can install the extension with
add_lmt() in R:
See below to learn how to use the extension with Quarto documents.
The LMT extension can be used even if you don’t use Quarto. Download
the _extension/lmt/ directory from the extension repo and save
the lmt directory with its content where pandoc can find
it. Then you can just pass lmt/lmt.lua as a Lua script to
pandoc when rendering the source file (for example if you want to use it
with R Markdown files).
You can use the Praat syntax highlighting definition to highlight the
Praat code in the rendered file. Get the syntax definition
praat.xml here.
(This vignette uses the tango syntax highlighting theme.)
Create a new .qmd file and add the following in the YAML
header of the Quarto document:
filters:
- lmtWhen you render the document, the Pandoc filter will be run to create the Praat scripts defined in the document (see the following sections to learn how to define scripts).
hello.praat
To initialise a file (in this case our first script), use a code block and specify the file name, like so:
```{.praat file="hello.praat"}
# hello.praat
writeInfoLine: "Hello Praat!"
<<<append>>>
<<<fin>>>
```This will create a file hello.praat with the code in the
code block and it will embed code from the referenced code blocks
(i.e. append and fin).
Let’s define the append block. We can do so with a code
block for which we specify the ref name:
```{.praat ref="append"}
# append
appendInfoLine: "Heya!"
for i from 1 to 5
<<<loop>>>
endfor
```You will see that this code block has a referenced block too!
Referencing works recursively. The loop code block is
defined below.
```{.praat ref="loop"}
# loop
appendInfoLine: i
```second.praat
Now let’s make a new script.
```{.praat file="second.praat"}
# second.praat
x$ = "a"
writeInfoLine: x$
<<<fin>>>
```