.config/nix/install

   1 #!/bin/sh
   2
   3 # This script installs the Nix package manager on your system by
   4 # downloading a binary distribution and running its installer script
   5 # (which in turn creates and populates /nix).
   6
   7 { # Prevent execution if this script was only partially downloaded
   8 oops() {
   9     echo "$0:" "$@" >&2
  10     exit 1
  11 }
  12
  13 tmpDir="$(mktemp -d -t nix-binary-tarball-unpack.XXXXXXXXXX || \
  14           oops "Can't create temporary directory for downloading the Nix binary tarball")"
  15 cleanup() {
  16     rm -rf "$tmpDir"
  17 }
  18 trap cleanup EXIT INT QUIT TERM
  19
  20 require_util() {
  21     command -v "$1" > /dev/null 2>&1 ||
  22         oops "you do not have '$1' installed, which I need to $2"
  23 }
  24
  25 case "$(uname -s).$(uname -m)" in
  26     Linux.x86_64) system=x86_64-linux; hash=e43f6947d1f302b6193302889e7800f3e3dd4a650b6f929c668c894884a02701;;
  27     Linux.i?86) system=i686-linux; hash=e1c6fa89a0d55a56cddb5f26598a15e0f238115423ad884a3673a3e4815fd33b;;
  28     Linux.aarch64) system=aarch64-linux; hash=b31d50b34f2aeacdecbe97e56d5661b59b49ec84fa5ea3f8ddb022ab1bb5de56;;
  29     Darwin.x86_64) system=x86_64-darwin; hash=972ff28bf5786a079856cba6941a6001046e4bdbc99cb2f114e6fce31b9265ba;;
  30     *) oops "sorry, there is no binary distribution of Nix for your platform";;
  31 esac
  32
  33 url="https://nixos.org/releases/nix/nix-2.3/nix-2.3-$system.tar.xz"
  34
  35 tarball="$tmpDir/$(basename "$tmpDir/nix-2.3-$system.tar.xz")"
  36
  37 require_util curl "download the binary tarball"
  38 require_util tar "unpack the binary tarball"
  39
  40 echo "downloading Nix 2.3 binary tarball for $system from '$url' to '$tmpDir'..."
  41 curl -L "$url" -o "$tarball" || oops "failed to download '$url'"
  42
  43 if command -v sha256sum > /dev/null 2>&1; then
  44     hash2="$(sha256sum -b "$tarball" | cut -c1-64)"
  45 elif command -v shasum > /dev/null 2>&1; then
  46     hash2="$(shasum -a 256 -b "$tarball" | cut -c1-64)"
  47 elif command -v openssl > /dev/null 2>&1; then
  48     hash2="$(openssl dgst -r -sha256 "$tarball" | cut -c1-64)"
  49 else
  50     oops "cannot verify the SHA-256 hash of '$url'; you need one of 'shasum', 'sha256sum', or 'openssl'"
  51 fi
  52
  53 if [ "$hash" != "$hash2" ]; then
  54     oops "SHA-256 hash mismatch in '$url'; expected $hash, got $hash2"
  55 fi
  56
  57 unpack=$tmpDir/unpack
  58 mkdir -p "$unpack"
  59 tar -xf "$tarball" -C "$unpack" || oops "failed to unpack '$url'"
  60
  61 script=$(echo "$unpack"/*/install)
  62
  63 [ -e "$script" ] || oops "installation script is missing from the binary tarball!"
  64 "$script" "$@"
  65
  66 } # End of wrapping