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authorLudovic Courtès <ludovic.courtes@inria.fr>2021-09-17 10:13:15 +0200
committerLudovic Courtès <ludo@gnu.org>2021-09-21 15:15:52 +0200
commit5b32ad4f6f555d305659cee825879df075b06331 (patch)
tree41006f22dae8547c5b7a159e52bce284a438f533 /doc/guix.texi
parentbe32889902abc29c14f3ea9a4f52da1bf9a0383a (diff)
graph: Add '--max-depth'.
* guix/graph.scm (export-graph): Add #:max-depth and honor it, adding 'depths' argument to 'loop'. * guix/scripts/graph.scm (%options, show-help): Add '--max-depth'. (%default-options): Add 'max-depth'. (guix-graph): Pass #:max-depth to 'export-graph'. * tests/graph.scm ("package DAG, limited depth"): New test. * doc/guix.texi (Invoking guix graph): Document it.
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diff --git a/doc/guix.texi b/doc/guix.texi
index cd8e249ae8..b15a45a977 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -12644,6 +12644,20 @@ $ guix graph --path -t references emacs libunistring
/gnu/store/@dots{}-libunistring-0.9.10
@end example
+Sometimes you still want to visualize the graph but would like to trim
+it so it can actually be displayed. One way to do it is via the
+@option{--max-depth} (or @option{-M}) option, which lets you specify the
+maximum depth of the graph. In the example below, we visualize only
+@code{libreoffice} and the nodes whose distance to @code{libreoffice} is
+at most 2:
+
+@example
+guix graph -M 2 libreoffice | xdot -f fdp -
+@end example
+
+Mind you, that's still a big ball of spaghetti, but at least
+@command{dot} can render it quickly and it can be browsed somewhat.
+
The available options are the following:
@table @option