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install script: don't abort when "nix-channel --update" fails

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Instead, print a message about what happened and tell the user what can
be done (run "[sudo -i] nix-channel --update nixpkgs" again at a later
time). This change allows installing Nix when you're offline.

Since the multi-user installer is so verbose, the message isn't printed
until the end.

Fixes issue #2650 ("installation without internet connection").
This commit is contained in:
Bjørn Forsman 2019-02-13 11:28:28 +01:00
parent e58a71442a
commit b9567aa8b6
2 changed files with 13 additions and 2 deletions
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5
scripts/install-nix-from-closure.sh
View file

@ -138,7 +138,10 @@ if ! $nix/bin/nix-channel --list | grep -q "^nixpkgs "; then
$nix/bin/nix-channel --add https://nixos.org/channels/nixpkgs-unstable
fi
if [ -z "$_NIX_INSTALLER_TEST" ]; then
$nix/bin/nix-channel --update nixpkgs
if ! $nix/bin/nix-channel --update nixpkgs; then
echo "Fetching the nixpkgs channel failed. (Are you offline?)"
echo "To try again later, run \"nix-channel --update nixpkgs\"."
fi
fi
added=