generate

#!/usr/bin/env bash
set -euo pipefail

output_dir="$1"

mkdir -p "$output_dir"

cat >"$output_dir/build.Dockerfile" <<'EOF'
ARG base_image
FROM ${base_image}
ARG user_id

USER root
RUN mkdir -p /nix && chmod 755 /nix
RUN curl -fsSL https://install.determinate.systems/nix | \
    sh -s -- install linux \
      --no-confirm \
      --init none \
      --extra-conf "sandbox = false" \
      ${NIX_VERSION:+--nix-package-url "https://releases.nixos.org/nix/nix-${NIX_VERSION}/nix-${NIX_VERSION}-$(uname -m)-linux.tar.xz"}
# ENV PATH="/nix/var/nix/profiles/default/bin:\${PATH}"
ENV PATH="${PATH}:/nix/var/nix/profiles/default/bin"

# Enable flakes
RUN /bin/mkdir -p /etc/nix && echo 'experimental-features = nix-command flakes' >> /etc/nix/nix.conf
RUN chown -R ${CNB_USER_ID}:${CNB_GROUP_ID} /nix

USER ${user_id}
EOF

BUILDPACK_ID="renku_nix-packages"
LAYER_NAME="nix-packages"
LAYER_PATH="/layers/${BUILDPACK_ID}/${LAYER_NAME}/nix/store"

cat >"$output_dir/run.Dockerfile" <<EOF
ARG base_image
FROM \${base_image}

USER root
RUN mkdir -p /nix && ln -sf ${LAYER_PATH} /nix/store
USER \${CNB_USER_ID}
EOF