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-rw-r--r--krebs/4lib/infest/2install-nix57
1 files changed, 57 insertions, 0 deletions
diff --git a/krebs/4lib/infest/2install-nix b/krebs/4lib/infest/2install-nix
new file mode 100644
index 000000000..3021c1143
--- /dev/null
+++ b/krebs/4lib/infest/2install-nix
@@ -0,0 +1,57 @@
+#! /bin/sh
+set -efu
+
+nix_url=https://nixos.org/releases/nix/nix-1.10/nix-1.10-x86_64-linux.tar.bz2
+nix_sha256="504f7a3a85fceffb8766ae5e1005de9e02e489742f5a63cc3e7552120b138bf4"
+
+install-nix() {(
+
+ # install nix on host (cf. https://nixos.org/nix/install)
+ if ! test -e /root/.nix-profile/etc/profile.d/nix.sh; then
+ (
+ verify() {
+ printf '%s %s\n' $nix_sha256 $(basename $nix_url) | sha256sum -c
+ }
+ if ! verify; then
+ curl -C - -O "$nix_url"
+ verify
+ fi
+ )
+ nix_src_dir=$(basename $nix_url .tar.bz2)
+ tar jxf $nix_src_dir.tar.bz2
+ mkdir -v -m 0755 -p /nix
+ $nix_src_dir/install
+ fi
+
+ #TODO: make this general or move to 1prepare
+ if ! mount | grep -Fq '/dev/mapper/centos-root on /mnt/nix type xfs'; then
+ mkdir -p /mnt/nix
+ mount --bind /nix /mnt/nix
+ fi
+
+ . /root/.nix-profile/etc/profile.d/nix.sh
+
+ for i in \
+ bash \
+ coreutils \
+ # This line intentionally left blank.
+ do
+ if ! nix-env -q $i | grep -q .; then
+ nix-env -iA nixpkgs.pkgs.$i
+ fi
+ done
+
+ # install nixos-install
+ if ! type nixos-install 2>/dev/null; then
+ nixpkgs_expr='import <nixpkgs> { system = builtins.currentSystem; }'
+ nixpkgs_path=$(find /nix/store -mindepth 1 -maxdepth 1 -name *-nixpkgs-* -type d)
+ nix-env \
+ --arg config "{ nix.package = ($nixpkgs_expr).nix; }" \
+ --arg pkgs "$nixpkgs_expr" \
+ --arg modulesPath 'throw "no modulesPath"' \
+ -f $nixpkgs_path/nixpkgs/nixos/modules/installer/tools/tools.nix \
+ -iA config.system.build.nixos-install
+ fi
+)}
+
+install-nix "$@"