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authorLudovic Courtès <ludo@gnu.org>2013-01-27 17:58:46 +0100
committerLudovic Courtès <ludo@gnu.org>2013-01-27 17:58:46 +0100
commit82fe08ed207a17c51370dc90e965c15ee9db9235 (patch)
treef9a06dfc729e5ce0af5013fa1370b875b7e3014f /doc
parentd9307267b3b4a87391e33daacef162745f057c3d (diff)
downloadguix-82fe08ed207a17c51370dc90e965c15ee9db9235.tar.gz
guix-package: Always use the next number for new generations.
Suggested by Andreas Enge <andreas@enge.fr> at
<http://lists.gnu.org/archive/html/bug-guix/2013-01/msg00325.html>.

* guix-package.in (latest-profile-number): Remove.
  (switch-symlinks): New procedure.
  (roll-back)[switch-link]: Use it.
  (guix-package)[process-actions]: Always choose NUMBER + 1 for the new
  profile.  Use `switch-symlinks' instead of `symlink'.  Remove code to
  delete PROFILE when it exists since `switch-symlinks' has the same
  effect.
* tests/guix-package.sh: Adjust existing `--roll-back' tests.
* doc/guix.texi (Invoking guix-package): Document this `--roll-back'
  behavior.
Diffstat (limited to 'doc')
-rw-r--r--doc/guix.texi4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 1385cd4532..52c992044b 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -514,6 +514,10 @@ installed packages, the profile is made to point to the @dfn{empty
 profile}, also known as @dfn{profile zero}---i.e., it contains no files
 apart from its own meta-data.
 
+Installing, removing, or upgrading packages from a generation that has
+been rolled back to overwrites previous future generations.  Thus, the
+history of a profile's generations is always linear.
+
 @item --profile=@var{profile}
 @itemx -p @var{profile}
 Use @var{profile} instead of the user's default profile.