334bb6100b
Don't run the installer if Nix has already been installed on the host. We assume that the installed Nix is already in the desired state. This allows to share a given pipeline between hosted and self-hosted runners. Usually the self-hosted runners are long-lived and already have Nix installed.
55 lines
1.5 KiB
Bash
Executable File
55 lines
1.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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if type -p nix &>/dev/null ; then
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echo "Aborting: Nix is already installed at $(type -p nix)"
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exit
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fi
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# Configure Nix
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add_config() {
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echo "$1" | sudo tee -a /tmp/nix.conf >/dev/null
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}
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# Set jobs to number of cores
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add_config "max-jobs = auto"
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# Allow binary caches for user
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add_config "trusted-users = root $USER"
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# Append extra nix configuration if provided
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if [[ $INPUT_EXTRA_NIX_CONFIG != "" ]]; then
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add_config "$INPUT_EXTRA_NIX_CONFIG"
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fi
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# Nix installer flags
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installer_options=(
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--daemon
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--daemon-user-count 4
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--no-channel-add
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--darwin-use-unencrypted-nix-store-volume
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--nix-extra-conf-file /tmp/nix.conf
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)
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# On self-hosted runners we don't need to install more than once
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if [[ ! -d /nix/store ]]
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then
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sh <(curl --retry 5 --retry-connrefused -L "${INPUT_INSTALL_URL:-https://nixos.org/nix/install}") "${installer_options[@]}"
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fi
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if [[ $OSTYPE =~ darwin ]]; then
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# Disable spotlight indexing of /nix to speed up performance
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sudo mdutil -i off /nix
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# macOS needs certificates hints
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cert_file=/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt
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echo "NIX_SSL_CERT_FILE=$cert_file" >> $GITHUB_ENV
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export NIX_SSL_CERT_FILE=$cert_file
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sudo launchctl setenv NIX_SSL_CERT_FILE "$cert_file"
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fi
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# Set paths
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echo "/nix/var/nix/profiles/per-user/$USER/profile/bin" >> $GITHUB_PATH
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echo "/nix/var/nix/profiles/default/bin" >> $GITHUB_PATH
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if [[ $INPUT_NIX_PATH != "" ]]; then
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echo "NIX_PATH=${INPUT_NIX_PATH}" >> $GITHUB_ENV
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fi
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