mirror of
https://github.com/cachix/install-nix-action.git
synced 2024-10-16 14:37:29 +00:00
86 lines
2.5 KiB
Bash
Executable file
86 lines
2.5 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 $(type -p nix)"
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exit
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fi
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# Create a temporary workdir
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workdir=$(mktemp -d)
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trap 'rm -rf "$workdir"' EXIT
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# Configure Nix
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add_config() {
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echo "$1" | tee -a "$workdir/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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if [[ ! $INPUT_EXTRA_NIX_CONFIG =~ "experimental-features" ]]; then
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add_config "experimental-features = nix-command flakes"
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fi
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# Nix installer flags
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installer_options=(
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--no-channel-add
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--darwin-use-unencrypted-nix-store-volume
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--nix-extra-conf-file "$workdir/nix.conf"
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)
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# only use the nix-daemon settings if on darwin (which get ignored) or systemd is supported
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if [[ $OSTYPE =~ darwin || -e /run/systemd/system ]]; then
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installer_options+=(
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--daemon
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--daemon-user-count "$(python -c 'import multiprocessing as mp; print(mp.cpu_count() * 2)')"
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)
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else
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# "fix" the following error when running nix*
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# error: the group 'nixbld' specified in 'build-users-group' does not exist
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add_config "build-users-group ="
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sudo mkdir -p /etc/nix
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sudo chmod 0755 /etc/nix
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sudo cp $workdir/nix.conf /etc/nix/nix.conf
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fi
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if [[ $INPUT_INSTALL_OPTIONS != "" ]]; then
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IFS=' ' read -r -a extra_installer_options <<< "$INPUT_INSTALL_OPTIONS"
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installer_options=("${extra_installer_options[@]}" "${installer_options[@]}")
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fi
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echo "installer options: ${installer_options[*]}"
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# There is --retry-on-errors, but only newer curl versions support that
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curl_retries=5
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while ! curl -sS -o "$workdir/install" -v --fail -L "${INPUT_INSTALL_URL:-https://nixos.org/nix/install}"
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do
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sleep 1
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((curl_retries--))
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if [[ $curl_retries -le 0 ]]; then
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echo "curl retries failed" >&2
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exit 1
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fi
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done
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sh "$workdir/install" "${installer_options[@]}"
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if [[ $OSTYPE =~ darwin ]]; then
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# macOS needs certificates hints
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cert_file=/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt
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echo "NIX_SSL_CERT_FILE=$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 "$cert_file"
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fi
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# Set paths
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echo "/nix/var/nix/profiles/default/bin" >> "$GITHUB_PATH"
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echo "/nix/var/nix/profiles/per-user/$USER/profile/bin" >> "$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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