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authorLudovic Courtès <ludo@gnu.org>2017-10-16 10:12:53 +0200
committerLudovic Courtès <ludo@gnu.org>2017-10-22 22:09:00 -0700
commitd298c815e638581d466222f3a883b280f019b368 (patch)
treeec0f0c1928ffc9a8391b8063ab5946c109673e30 /doc
parentdedb512f8f2282f7de3d5b56e7551e486e37840c (diff)
downloadguix-d298c815e638581d466222f3a883b280f019b368.tar
guix-d298c815e638581d466222f3a883b280f019b368.tar.gz
gexp: Add 'directory-union'.
* gnu/services.scm (directory-union): Move to... * guix/gexp.scm (directory-union): ... here. New procedure. * doc/guix.texi (G-Expressions): Document it.
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diff --git a/doc/guix.texi b/doc/guix.texi
index ce8b977e1b..d7fabe9599 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5007,6 +5007,17 @@ denoting the target file. Here's an example:
This yields an @code{etc} directory containing these two files.
@end deffn
+@deffn {Scheme Procedure} directory-union @var{name} @var{things}
+Return a directory that is the union of @var{things}, where @var{things} is a list of
+file-like objects denoting directories. For example:
+
+@example
+(directory-union "guile+emacs" (list guile emacs))
+@end example
+
+yields a directory that is the union of the @code{guile} and @code{emacs} packages.
+@end deffn
+
@deffn {Scheme Procedure} file-append @var{obj} @var{suffix} @dots{}
Return a file-like object that expands to the concatenation of @var{obj}
and @var{suffix}, where @var{obj} is a lowerable object and each