67 lines
2.2 KiB
Bash
67 lines
2.2 KiB
Bash
#!/bin/sh
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# This script installs the Nix package manager on your system by
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# downloading a binary distribution and running its installer script
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# (which in turn creates and populates /nix).
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{ # Prevent execution if this script was only partially downloaded
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oops() {
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echo "$0:" "$@" >&2
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exit 1
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}
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tmpDir="$(mktemp -d -t nix-binary-tarball-unpack.XXXXXXXXXX || \
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oops "Can't create temporary directory for downloading the Nix binary tarball")"
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cleanup() {
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rm -rf "$tmpDir"
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}
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trap cleanup EXIT INT QUIT TERM
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require_util() {
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command -v "$1" > /dev/null 2>&1 ||
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oops "you do not have '$1' installed, which I need to $2"
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}
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case "$(uname -s).$(uname -m)" in
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Linux.x86_64) system=x86_64-linux; hash=@binaryTarball_x86_64-linux@;;
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Linux.i?86) system=i686-linux; hash=@binaryTarball_i686-linux@;;
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Linux.aarch64) system=aarch64-linux; hash=@binaryTarball_aarch64-linux@;;
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Darwin.x86_64) system=x86_64-darwin; hash=@binaryTarball_x86_64-darwin@;;
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*) oops "sorry, there is no binary distribution of Nix for your platform";;
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esac
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url="https://nixos.org/releases/nix/nix-@nixVersion@/nix-@nixVersion@-$system.tar.xz"
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tarball="$tmpDir/$(basename "$tmpDir/nix-@nixVersion@-$system.tar.xz")"
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require_util curl "download the binary tarball"
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require_util tar "unpack the binary tarball"
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echo "downloading Nix @nixVersion@ binary tarball for $system from '$url' to '$tmpDir'..."
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curl -L "$url" -o "$tarball" || oops "failed to download '$url'"
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if command -v sha256sum > /dev/null 2>&1; then
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hash2="$(sha256sum -b "$tarball" | cut -c1-64)"
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elif command -v shasum > /dev/null 2>&1; then
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hash2="$(shasum -a 256 -b "$tarball" | cut -c1-64)"
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elif command -v openssl > /dev/null 2>&1; then
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hash2="$(openssl dgst -r -sha256 "$tarball" | cut -c1-64)"
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else
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oops "cannot verify the SHA-256 hash of '$url'; you need one of 'shasum', 'sha256sum', or 'openssl'"
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fi
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if [ "$hash" != "$hash2" ]; then
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oops "SHA-256 hash mismatch in '$url'; expected $hash, got $hash2"
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fi
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unpack=$tmpDir/unpack
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mkdir -p "$unpack"
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tar -xf "$tarball" -C "$unpack" || oops "failed to unpack '$url'"
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script=$(echo "$unpack"/*/install)
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[ -e "$script" ] || oops "installation script is missing from the binary tarball!"
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"$script" "$@"
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} # End of wrapping
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