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authorLudovic Courtès <ludo@gnu.org>2016-10-15 22:47:42 +0200
committerLudovic Courtès <ludo@gnu.org>2016-10-15 23:46:39 +0200
commit7f8fec0fa40951de33822f86c31c32e3f3c5513e (patch)
tree2e3ebc7b65649ae26279cfbaeac97878cbbc33f1 /doc
parent783ae212c213d6194ecbbdb13b91d93a6644a1ac (diff)
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graph: Add '%referrer-node-type'.
* guix/scripts/graph.scm (ensure-store-items): New procedure. (%reference-node-type)[convert]: Use it. (non-derivation-referrers): New procedure. (%referrer-node-type): New variable. (%node-types): Add it. * tests/graph.scm ("referrer DAG"): New test. * doc/guix.texi (Invoking guix graph): Document it.
Diffstat (limited to 'doc')
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diff --git a/doc/guix.texi b/doc/guix.texi
index 74733f4fd1..47fc199c6c 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5546,6 +5546,20 @@ example, the command below produces the reference graph of your profile
@example
guix graph -t references `readlink -f ~/.guix-profile`
@end example
+
+@item referrers
+This is the graph of the @dfn{referrers} of a store item, as returned by
+@command{guix gc --referrers} (@pxref{Invoking guix gc}).
+
+This relies exclusively on local information from your store. For
+instance, let us suppose that the current Inkscape is available in 10
+profiles on your machine; @command{guix graph -t referrers inkscape}
+will show a graph rooted at Inkscape and with those 10 profiles linked
+to it.
+
+It can help determine what is preventing a store item from being garbage
+collected.
+
@end table
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