From fe5f21d802fb566dcac1dbf746ec8f4648f950a3 Mon Sep 17 00:00:00 2001
From: Evie Litherland-Smith <evie.litherland-smith@ukaea.uk>
Date: Thu, 20 Apr 2023 11:40:30 +0100
Subject: [PATCH] Start reorganising Makefile

Add downloaded copy of nix installer shell script
---
 Makefile               |  25 ++++-----
 scripts/install_nix.sh | 119 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 132 insertions(+), 12 deletions(-)
 create mode 100755 scripts/install_nix.sh

diff --git a/Makefile b/Makefile
index 38b010a4..7901026c 100644
--- a/Makefile
+++ b/Makefile
@@ -9,41 +9,42 @@ CONFIG_TARGETS := $(CONFIG_ITEMS:config/%=$(CONFIG_DIR)/%)
 SSH_ITEMS := $(wildcard ssh/*)
 SSH_TARGETS := $(SSH_ITEMS:ssh/%=$(SSH_DIR)/%)
 
-.PHONY: default all clean check directories link home install
+.PHONY: default all clean link home nixos install
 
-default: directories link
+default: install home
 
 all: default install home
 
 clean:
-	for link in $(CONFIG_TARGETS); do rm "$$link"; done
-	for link in $(SSH_TARGETS); do rm "$$link"; done
+	rm $(SSH_DIR)/config.d
 	rm $(HOME)/.inputrc
 	rm -rf $(HOME)/.local/share/nvim
 
-directories: $(CONFIG_DIR) $(SSH_DIR)
-
 $(CONFIG_DIR) $(SSH_DIR) $(CONFIG_DIR)/home-manager:
 	mkdir -p $@
 
-link: $(CONFIG_TARGETS) $(SSH_DIR)/config.d $(HOME)/.inputrc
+link: $(SSH_DIR)/config.d $(HOME)/.inputrc
 
-$(CONFIG_TARGETS): $(CONFIG_DIR)/%: config/%
 $(SSH_DIR)/config.d: $(SSH_DIR)/%: ssh/%
 $(HOME)/.inputrc: $(HOME)/%: %
-$(CONFIG_TARGETS) $(SSH_DIR)/config.d $(HOME)/.inputrc:
+$(SSH_DIR)/config.d $(HOME)/.inputrc:
 	ln -s $(PWD)/$? $@
 
+legacy:
+	echo "TODO"
+
 home: $(CONFIG_DIR)/home-manager/home.nix
 
 $(CONFIG_DIR)/home-manager/home.nix: $(CONFIG_DIR)/home-manager
 	ln -s $(HOMEMANAGER_CONFIG) $@
 
-install: /nix /etc/nixos/$(HOSTNAME)-$(USER).nix
+nixos: /etc/nixos/$(HOSTNAME)-$(USER).nix
 
-/etc/nixos/$(HOSTNAME)-$(USER).nix:
+/etc/nixos/$(HOSTNAME)-$(USER).nix: /nix
 	[ -f $(NIXOS_CONFIG) ] || touch $(NIXOS_CONFIG)
 	sudo ln -s $(NIXOS_CONFIG) $@
 
+install: /nix
+
 /nix:
-	command -v nix > /dev/null && echo "Nix already installed" || sh <(curl -L https://nixos.org/nix/install) --daemon
+	command -v nix > /dev/null && echo "Nix already installed" || ./scripts/install_nix.sh --daemon
diff --git a/scripts/install_nix.sh b/scripts/install_nix.sh
new file mode 100755
index 00000000..01470ddb
--- /dev/null
+++ b/scripts/install_nix.sh
@@ -0,0 +1,119 @@
+#!/bin/sh
+
+# This script installs the Nix package manager on your system by
+# downloading a binary distribution and running its installer script
+# (which in turn creates and populates /nix).
+
+{ # Prevent execution if this script was only partially downloaded
+oops() {
+    echo "$0:" "$@" >&2
+    exit 1
+}
+
+umask 0022
+
+tmpDir="$(mktemp -d -t nix-binary-tarball-unpack.XXXXXXXXXX || \
+          oops "Can't create temporary directory for downloading the Nix binary tarball")"
+cleanup() {
+    rm -rf "$tmpDir"
+}
+trap cleanup EXIT INT QUIT TERM
+
+require_util() {
+    command -v "$1" > /dev/null 2>&1 ||
+        oops "you do not have '$1' installed, which I need to $2"
+}
+
+case "$(uname -s).$(uname -m)" in
+    Linux.x86_64)
+        hash=1bdf98f951ce82ad1a12b9e6874f5858cb2aa2e402907e8c3079d8482cb8430b
+        path=dw0gkcqnig9qwyhkrq0sjrzai63zi6wy/nix-2.15.0-x86_64-linux.tar.xz
+        system=x86_64-linux
+        ;;
+    Linux.i?86)
+        hash=c868bed9bfff72a363b1a41f95bce971f8ccca111e5e3c9f8e2fa5e9bde91f75
+        path=ayl7z135hkqhf4px5pacv47b4njqb9yj/nix-2.15.0-i686-linux.tar.xz
+        system=i686-linux
+        ;;
+    Linux.aarch64)
+        hash=3a08669bf8d27b5994fceb2bc4653fddab189832a8bd111d013591862eb45961
+        path=26zpxva102pm9jz8nkb391ws3c7six2j/nix-2.15.0-aarch64-linux.tar.xz
+        system=aarch64-linux
+        ;;
+    Linux.armv6l)
+        hash=88736c6fda47d2c244d38ec81250111263c6756a5c9e5232fb56d5e1245f3aae
+        path=1m9il80f2y41qsarmarf3dkb23ryg2h8/nix-2.15.0-armv6l-linux.tar.xz
+        system=armv6l-linux
+        ;;
+    Linux.armv7l)
+        hash=44010bc59ad7504274533daf5d23d6773a286c5b7ac87960d330cc0580149462
+        path=v2z7fhd4rq2n5s2svdk2dh6mf112w7ca/nix-2.15.0-armv7l-linux.tar.xz
+        system=armv7l-linux
+        ;;
+    Darwin.x86_64)
+        hash=d8b6a6e89f82113fcbce3d946fa501d5d2cf7cb35c88fb2017f3c12ef8392e7d
+        path=m01jb6iyf73jiyzdn6vfap8da347nmwf/nix-2.15.0-x86_64-darwin.tar.xz
+        system=x86_64-darwin
+        ;;
+    Darwin.arm64|Darwin.aarch64)
+        hash=2d4a8060e12077f174e0635ec06d94daeee0460166165414698dfdf0ef87915a
+        path=aa9fsy71mdsqp6kgf5sag6kv50zavhj5/nix-2.15.0-aarch64-darwin.tar.xz
+        system=aarch64-darwin
+        ;;
+    *) oops "sorry, there is no binary distribution of Nix for your platform";;
+esac
+
+# Use this command-line option to fetch the tarballs using nar-serve or Cachix
+if [ "${1:-}" = "--tarball-url-prefix" ]; then
+    if [ -z "${2:-}" ]; then
+        oops "missing argument for --tarball-url-prefix"
+    fi
+    url=${2}/${path}
+    shift 2
+else
+    url=https://releases.nixos.org/nix/nix-2.15.0/nix-2.15.0-$system.tar.xz
+fi
+
+tarball=$tmpDir/nix-2.15.0-$system.tar.xz
+
+require_util tar "unpack the binary tarball"
+if [ "$(uname -s)" != "Darwin" ]; then
+    require_util xz "unpack the binary tarball"
+fi
+
+if command -v curl > /dev/null 2>&1; then
+    fetch() { curl --fail -L "$1" -o "$2"; }
+elif command -v wget > /dev/null 2>&1; then
+    fetch() { wget "$1" -O "$2"; }
+else
+    oops "you don't have wget or curl installed, which I need to download the binary tarball"
+fi
+
+echo "downloading Nix 2.15.0 binary tarball for $system from '$url' to '$tmpDir'..."
+fetch "$url" "$tarball" || oops "failed to download '$url'"
+
+if command -v sha256sum > /dev/null 2>&1; then
+    hash2="$(sha256sum -b "$tarball" | cut -c1-64)"
+elif command -v shasum > /dev/null 2>&1; then
+    hash2="$(shasum -a 256 -b "$tarball" | cut -c1-64)"
+elif command -v openssl > /dev/null 2>&1; then
+    hash2="$(openssl dgst -r -sha256 "$tarball" | cut -c1-64)"
+else
+    oops "cannot verify the SHA-256 hash of '$url'; you need one of 'shasum', 'sha256sum', or 'openssl'"
+fi
+
+if [ "$hash" != "$hash2" ]; then
+    oops "SHA-256 hash mismatch in '$url'; expected $hash, got $hash2"
+fi
+
+unpack=$tmpDir/unpack
+mkdir -p "$unpack"
+tar -xJf "$tarball" -C "$unpack" || oops "failed to unpack '$url'"
+
+script=$(echo "$unpack"/*/install)
+
+[ -e "$script" ] || oops "installation script is missing from the binary tarball!"
+export INVOKED_FROM_INSTALL_IN=1
+"$script" "$@"
+
+} # End of wrapping