install-nix-action/lib/install-nix.sh

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#!/usr/bin/env bash
set -euo pipefail
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# Set jobs to number of cores
sudo sh -c 'echo max-jobs = auto >> /tmp/nix.conf'
# Allow binary caches for runner user
sudo sh -c 'echo trusted-users = root runner >> /tmp/nix.conf'
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if [[ $INPUT_SKIP_ADDING_NIXPKGS_CHANNEL = "true" || $INPUT_NIX_PATH != "" ]]; then
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extra_cmd=--no-channel-add
else
extra_cmd=
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INPUT_NIX_PATH="/nix/var/nix/profiles/per-user/root/channels"
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fi
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sh <(curl -L ${INPUT_INSTALL_URL:-https://nixos.org/nix/install}) \
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--daemon --daemon-user-count 4 --nix-extra-conf-file /tmp/nix.conf --darwin-use-unencrypted-nix-store-volume $extra_cmd
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if [[ $OSTYPE =~ darwin ]]; then
# Disable spotlight indexing of /nix to speed up performance
sudo mdutil -i off /nix
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# macOS needs certificates hints
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cert_file=/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt
echo "::set-env name=NIX_SSL_CERT_FILE::$cert_file"
export NIX_SSL_CERT_FILE=$cert_file
sudo launchctl setenv NIX_SSL_CERT_FILE "$cert_file"
fi
# Set paths
echo "::add-path::/nix/var/nix/profiles/per-user/runner/profile/bin"
echo "::add-path::/nix/var/nix/profiles/default/bin"
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if [[ $INPUT_NIX_PATH != "" ]]; then
echo "::set-env name=NIX_PATH::${INPUT_NIX_PATH}"
fi