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authorLudovic Courtès <ludo@gnu.org>2013-01-17 22:41:47 +0100
committerLudovic Courtès <ludo@gnu.org>2013-01-17 22:42:39 +0100
commit9241172c9dc41ac026f05837dc6f089b1a3745e0 (patch)
treeede4741b6a1ae27286b450c716212557d3937005 /guix-gc.in
parent24e262f086980a13d9d0a27615ed7eaec4aacbff (diff)
downloadguix-9241172c9dc41ac026f05837dc6f089b1a3745e0.tar.gz
guix-package: Allow `--roll-back' to skip missing generations.
* guix-package.in (profile-numbers): New procedure.
  (latest-profile-number): Use it.
  (previous-profile-number): New procedure.
  (roll-back): Use it lieu of `1-'.  Check whether PREVIOUS-NUMBER is
  zero, and raise an error when it is.
* tests/guix-package.sh: Test whether we can roll back over a "hole".
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