pull: '--list-generations' lists packages only with '--details'.

* guix/scripts/pull.scm (show-help, %options): Add "--details".
(process-query): Honor it.
* doc/guix.texi (Invoking guix pull): Document it.

1 files changed, 9 insertions, 6 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index c116be8907..a05f073c3d 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4426,18 +4426,12 @@ Generation 2	Jun 11 2018 11:02:49
     repository URL: https://git.savannah.gnu.org/git/guix.git
     branch: origin/master
     commit: e0cc7f669bec22c37481dd03a7941c7d11a64f1d
-  2 new packages: keepalived, libnfnetlink
-  6 packages upgraded: emacs-nix-mode@@2.0.4,
-    guile2.0-guix@@0.14.0-12.77a1aac, guix@@0.14.0-12.77a1aac,
-    heimdal@@7.5.0, milkytracker@@1.02.00, nix@@2.0.4
 
 Generation 3	Jun 13 2018 23:31:07	(current)
   guix 844cc1c
     repository URL: https://git.savannah.gnu.org/git/guix.git
     branch: origin/master
     commit: 844cc1c8f394f03b404c5bb3aee086922373490c
-  28 new packages: emacs-helm-ls-git, emacs-helm-mu, @dots{}
-  69 packages upgraded: borg@@1.1.6, cheese@@3.28.0, @dots{}
 @end example
 
 @xref{Invoking guix describe, @command{guix describe}}, for other ways to
@@ -4507,6 +4501,15 @@ is provided, the subset of generations that match @var{pattern}.
 The syntax of @var{pattern} is the same as with @code{guix package
 --list-generations} (@pxref{Invoking guix package}).
 
+By default, this prints information about the channels used in each
+revision as well as the corresponding news entries.  If you pass
+@option{--details}, it will also print the list of packages added and
+upgraded in each generation compared to the previous one.
+
+@item --details
+Instruct @option{--list-generations} to display more information about
+the differences between subsequent generations---see above.
+
 @item --roll-back
 @cindex rolling back
 @cindex undoing transactions