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

Browse source 
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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10
scripts/install-multi-user.sh
View file

@ -240,10 +240,16 @@ EOF
} }
trap finish_fail EXIT trap finish_fail EXIT
channel_update_failed=0
function finish_success { function finish_success {
finish_cleanup finish_cleanup
ok "Alright! We're done!" ok "Alright! We're done!"
if [ "x$channel_update_failed" = x1 ]; then
echo ""
echo "But fetching the nixpkgs channel failed. (Are you offline?)"
echo "To try again later, run \"sudo -i nix-channel --update nixpkgs\"."
fi
cat <<EOF cat <<EOF
Before Nix will work in your existing shells, you'll need to close Before Nix will work in your existing shells, you'll need to close
@ -737,7 +743,9 @@ setup_default_profile() {
# otherwise it will be lost in environments where sudo doesn't pass # otherwise it will be lost in environments where sudo doesn't pass
# all the environment variables by default. # all the environment variables by default.
_sudo "to update the default channel in the default profile" \ _sudo "to update the default channel in the default profile" \
HOME="$ROOT_HOME" NIX_SSL_CERT_FILE="$NIX_SSL_CERT_FILE" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs HOME="$ROOT_HOME" NIX_SSL_CERT_FILE="$NIX_SSL_CERT_FILE" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs \
|| channel_update_failed=1
} }

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 $nix/bin/nix-channel --add https://nixos.org/channels/nixpkgs-unstable
fi fi
if [ -z "$_NIX_INSTALLER_TEST" ]; then 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 fi
added= added=