From e06b59d82ca08d31a7799795e72d93c5e1de077e Mon Sep 17 00:00:00 2001
From: Thomas Hobson <git@hexf.me>
Date: Tue, 5 Oct 2021 15:18:08 +1300
Subject: [PATCH] dockerfile to manage mounting of /nix

---
 api/Dockerfile    |  7 +++++--
 api/entrypoint.sh | 11 +++++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)
 create mode 100755 api/entrypoint.sh

diff --git a/api/Dockerfile b/api/Dockerfile
index 6e0ff79..ace28d0 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -18,10 +18,11 @@ RUN apt-get update && \
 
 RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
 
-RUN mkdir -m 0755 /nix && chown node /nix
+RUN mkdir -m 0755 /nix && chown node /nix && touch /nix/piston_detected
 RUN runuser -l node -c 'curl -L https://nixos.org/nix/install | sh -s -- --no-daemon '
 RUN runuser -l node -c 'source ~/.profile; nix-env -iA nixpkgs.nixUnstable'
 RUN runuser -l node -c 'mkdir -p /home/node/.config/nix/; echo "experimental-features = nix-command flakes" >> /home/node/.config/nix/nix.conf'
+RUN cp -r /nix /var/nix
 
 WORKDIR /piston_api
 COPY ["package.json", "package-lock.json", "./"]
@@ -30,5 +31,7 @@ COPY ./src ./src
 
 RUN make -C ./src/nosocket/ all && make -C ./src/nosocket/ install
 
-CMD [ "node", "src"]
+COPY ./entrypoint.sh . 
+
+CMD [ "./entrypoint.sh"]
 EXPOSE 2000/tcp
diff --git a/api/entrypoint.sh b/api/entrypoint.sh
new file mode 100755
index 0000000..17966e5
--- /dev/null
+++ b/api/entrypoint.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+echo "Starting Piston API"
+
+echo "Checking presense of nix store"
+if [[ ! -f "/nix/piston_detected" ]]; then
+    echo "Nix Store is not loaded, assuming /nix has been mounted - copying contents"
+    cp -r /var/nix /nix
+fi
+
+echo "Launching Piston API"
+node src