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Add 'nix upgrade-nix' command

This command upgrades Nix to the latest stable version by installing a
store path obtained from

  https://github.com/NixOS/nixpkgs/raw/master/nixos/modules/installer/tools/nix-fallback-paths.nix

which is the same store path that the installer at
https://nixos.org/nix/install.sh uses.

The upgrade fails if Nix is not installed in a profile (e.g. on NixOS,
or when installed outside of the Nix store).
This commit is contained in:
Eelco Dolstra 2018-01-31 16:14:47 +01:00
parent 8af911be5c
commit 6fa690291a
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GPG key ID: 8170B4726D7198DE
4 changed files with 142 additions and 1 deletions

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@ -79,6 +79,11 @@
<listitem><para><command>nix add-to-store</command> (970366266b8df712f5f9cedb45af183ef5a8357f).</para></listitem>
<listitem><para><command>nix upgrade-nix</command> upgrades Nix
to the latest stable version. This requires that Nix is
installed in a profile. (Thus it wont work on NixOS, or if its
installed outside of the Nix store.)</para></listitem>
<listitem><para>Progress indicator.</para></listitem>
<listitem><para>All options are available as flags now