forked from lix-project/lix
4e6d7cb55a
On macOS the system tar has builtin support for lzma while xz isn't available as a separate binary. There's no builtin package manager there available either so having to install lzma (without nix) would be rather painful.
69 lines
2.3 KiB
Bash
69 lines
2.3 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).$(uname -m)" in
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Linux.x86_64) system=x86_64-linux; hash=@binaryTarball_x86_64-linux@;;
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Linux.i?86) system=i686-linux; hash=@binaryTarball_i686-linux@;;
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Linux.aarch64) system=aarch64-linux; hash=@binaryTarball_aarch64-linux@;;
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Darwin.x86_64) system=x86_64-darwin; hash=@binaryTarball_x86_64-darwin@;;
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*) oops "sorry, there is no binary distribution of Nix for your platform";;
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esac
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url="https://releases.nixos.org/nix/nix-@nixVersion@/nix-@nixVersion@-$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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if [ "$(uname -s)" != "Darwin" ]; then
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require_util xz "unpack the binary tarball"
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fi
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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 "$unpack"
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tar -xJf "$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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