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doc: Mention the d3.js backend of 'guix graph'.

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* doc/guix.texi (Invoking guix graph): Mention the d3.js backend.
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Ludovic Courtès 2016-12-18 17:11:13 +01:00
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@ -5726,11 +5726,13 @@ Consider packages for @var{system}---e.g., @code{x86_64-linux}.
Packages and their dependencies form a @dfn{graph}, specifically a Packages and their dependencies form a @dfn{graph}, specifically a
directed acyclic graph (DAG). It can quickly become difficult to have a directed acyclic graph (DAG). It can quickly become difficult to have a
mental model of the package DAG, so the @command{guix graph} command mental model of the package DAG, so the @command{guix graph} command
provides a visual representation of the DAG. @command{guix graph} provides a visual representation of the DAG. By default,
emits a DAG representation in the input format of @command{guix graph} emits a DAG representation in the input format of
@uref{http://www.graphviz.org/, Graphviz}, so its output can be passed @uref{http://www.graphviz.org/, Graphviz}, so its output can be passed
directly to the @command{dot} command of Graphviz. The general directly to the @command{dot} command of Graphviz. It can also emit an
syntax is: HTML page with embedded JavaScript code to display a ``chord diagram''
in a Web browser, using the @uref{https://d3js.org/, d3.js} library.
The general syntax is:
@example @example
guix graph @var{options} @var{package}@dots{} guix graph @var{options} @var{package}@dots{}
@ -5855,6 +5857,8 @@ Produce a graph using the selected @var{backend}.
@item --list-backends @item --list-backends
List the supported graph backends. List the supported graph backends.
Currently, the available backends are Graphviz and d3.js.
@item --expression=@var{expr} @item --expression=@var{expr}
@itemx -e @var{expr} @itemx -e @var{expr}
Consider the package @var{expr} evaluates to. Consider the package @var{expr} evaluates to.