[bug#47213] [PATCH v2] doc: Add snippet for running 'guix refresh' on installed

[Xinglu Chen]

* doc/guix.texi (Invoking guix refresh): Add snippet that runs 'guix refresh'
on all the packages installed in the current profile.
---
Changes since v1:
- Correct the example snippet.
- Refer the reader to "Running Guix Before It Is Installed".
- Add suggestion to run `guix package -i --with-latest`.

 doc/guix.texi | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 410670e639..d94772d5be 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -87,6 +87,7 @@
 Copyright @copyright{} 2020 John Soo@*
 Copyright @copyright{} 2020 Jonathan Brielmaier@*
 Copyright @copyright{} 2020 Edgar Vincent@*
+Copyright @copyright{} 2021 Xinglu Chen@*
 
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3 or
@@ -11719,8 +11720,21 @@
 
 @noindent
 The command above specifically updates the @code{emacs} and
-@code{idutils} packages.  The @option{--select} option would have no
-effect in this case.
+@code{idutils} packages (see @pxref{Running Guix Before It Is
+Installed}).  The @option{--select} option would have no effect in this
+case.
+
+You can also quickly update all the packages installed in the current
+profile with the following snippet:
+
+@example
+$ ./pre-inst-env guix refresh -u $(guix package --list-installed | cut -f1)
+@end example
+
+This is handy if you don't use manifests for installing packages into
+your profile.  If you just want to install the latest version of a
+package, run @command{guix package -i --with-latest} (see @pxref{Package
+Transformation Options}).
 
 When considering whether to upgrade a package, it is sometimes
 convenient to know which packages would be affected by the upgrade and

base-commit: 109f58444beecd1b9b7c502f2a687a6b91c62dc0
-- 
2.30.2