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authorMaxim Cournoyer <maxim.cournoyer@gmail.com>2020-03-17 22:10:40 -0400
committerMaxim Cournoyer <maxim.cournoyer@gmail.com>2020-03-17 23:01:07 -0400
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gnu: system: Export %sudoers-specification.
Exporting this variable allows reusing the default value of the `sudoers-file' field when configuring it. * gnu/system.scm (gnu): Export %sudoers-specification. * doc/guix.texi (Invoking guix deploy): Document an example, to use with 'guix deploy'.
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diff --git a/doc/guix.texi b/doc/guix.texi
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--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -26996,8 +26996,28 @@ login over SSH may be forbidden in some cases. To work around this,
@command{guix deploy} can log in as an unprivileged user and employ
@code{sudo} to escalate privileges. This will only work if @code{sudo} is
currently installed on the remote and can be invoked non-interactively as
-@code{user}. That is: the line in @code{sudoers} granting @code{user} the
-ability to use @code{sudo} must contain the @code{NOPASSWD} tag.
+@code{user}. That is, the line in @code{sudoers} granting @code{user} the
+ability to use @code{sudo} must contain the @code{NOPASSWD} tag. This can
+be accomplished with the following operating system configuration snippet:
+
+@lisp
+(use-modules ...
+ (gnu system) ;for %sudoers-specification))
+
+(define %user "username")
+
+(operating-system
+ ...
+ (sudoers-file
+ (plain-file "sudoers"
+ (string-append (plain-file-content %sudoers-specification)
+ (format #f "~a ALL = NOPASSWD: ALL~%"
+ %username)))))
+
+@end lisp
+
+For more information regarding the format of the @file{sudoers} file,
+consult @command{man sudoers}.
@deftp {Data Type} machine
This is the data type representing a single machine in a heterogeneous Guix