Sphinx d2lang extension

This is a very simple extension to Sphinx that implements a d2 directive to draw diagrams using d2.

To use it, first of all you must register the extension within the Sphinx environment, adding the full name of the package to the extensions list in the file conf.py, for example:

# Add any Sphinx extension module names here, as strings.
extensions = ['metapensiero.sphinx.d2']

You can optionally define the following default settings:

d2_center

Default value for the :center: option

d2_class

Default CSS class of the diagram, when producing HTML

d2_dark_theme

Default value for the :dark_theme: option

d2_format

Default value for the :format: option

d2_layout

Default value for the :layout: option

d2_pad

Default value for the :pad: option

d2_redirect_links_to_blank_page

Default value for the :redirect_links_to_blank_page: option

d2_scale

Default value for the :scale: option

d2_sketch

Default value for the :sketch: option

d2_theme

Default value for the :theme: option

At that point you can place d2 directives in your documents. The d2 script can be specified either inline, as the content of the directive, or as a file, relative to the document itself. The directive accepts the following options:

align

the alignment of the generated image

alt

the alternative textual description explaining the diagram

caption

a short description of the diagram

center

a boolean value, whether the diagram should be horizontally centered or not

class

the CSS classes of the diagram

dark_theme

an integer, the dark theme to be used

format

the output format, by default svg, but it can alternatively set to png

layout

the algorithm used to layout the diagram, either dagre (the default) or elk

pad

an integer number of pixels, by default 100

redirect_links_to_blank_page

when generating SVG, this forces all local link to be opened in a different browser tab

scale

a float number, the relative scale to be used

sketch

a boolean value, whether to enable the sketch mode

theme

an integer, the theme to be used

width

an integer value, the width of the containing figure

Directive-specific options have higher priority on default settings.

See example/index.rst for some usage examples.