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authorLudovic Courtès <ludo@gnu.org>2017-01-04 16:16:17 +0100
committerLudovic Courtès <ludo@gnu.org>2017-01-04 16:18:53 +0100
commitb96a0640a3ca128c0b9bf9acaef7b3b7a8bb1455 (patch)
treef228c2536475873ced944d315406ab869694a26e /doc/guix.texi
parenta614ce389f473d7b2792176a1022ccb28bc8f587 (diff)
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graph: Add '%reverse-package-node-type'.
* guix/scripts/graph.scm (%reverse-package-node-type): New variable. (%node-types): Add it. * tests/graph.scm ("reverse package DAG"): New test. * doc/guix.texi (Invoking guix refresh): Add cross-reference to "Invoking guix graph". (Invoking guix graph): Document 'reverse-package'.
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@@ -5445,6 +5445,10 @@ end, display the fraction of packages covered by all these updaters.
List top-level dependent packages that would need to be rebuilt as a
result of upgrading one or more packages.
+@xref{Invoking guix graph, the @code{reverse-package} type of
+@command{guix graph}}, for information on how to visualize the list of
+dependents of a package.
+
@end table
Be aware that the @code{--list-dependent} option only
@@ -5746,6 +5750,20 @@ This is the default type used in the example above. It shows the DAG of
package objects, excluding implicit dependencies. It is concise, but
filters out many details.
+@item reverse-package
+This shows the @emph{reverse} DAG of packages. For example:
+
+@example
+guix graph --type=reverse-package ocaml
+@end example
+
+... yields the graph of packages that depend on OCaml.
+
+Note that for core packages this can yield huge graphs. If all you want
+is to know the number of packages that depend on a given package, use
+@command{guix refresh --list-dependent} (@pxref{Invoking guix refresh,
+@option{--list-dependent}}).
+
@item bag-emerged
This is the package DAG, @emph{including} implicit inputs.