use ubuntu as base image for nix

Signed-off-by: Jakub Sokołowski <jakub@status.im>

.gitignore

@@ -1,4 +1,6 @@
 cloudflare/CloudFlare
+nix/nix-*.sh
 .terraform
 terraform.tfvars
 terraform.tfstate*
+*.bz2

nix/Dockerfile

@@ -1,32 +1,47 @@
-ARG NIX_VERSION
-FROM nixos/nix:${NIX_VERSION}
+FROM ubuntu:16.04
 
+ENV LANG=en_US.UTF-8 \
+    LC_ALL=en_US.UTF-8 \
+    LANGUAGE=en_US.UTF-8
+
+ARG NIX_VERSION
 ARG JENKINS_UID
 ARG JENKINS_GID
 
-RUN apk add --no-cache file strace
+RUN apt-get update \
+ && apt-get -q -y --no-install-recommends \
+      install file locales curl strace jq bzip2 ca-certificates \
+ && apt-get clean \
+ && locale-gen ${LANG} \
+ && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/man
 
-RUN chown ${JENKINS_UID}:${JENKINS_GID} -R /nix
+ADD nix-install-${NIX_VERSION}.sh /tmp/nix-install.sh
 
-RUN addgroup -g ${JENKINS_GID} jenkins
-RUN adduser -D -g jenkins -u ${JENKINS_UID} -G jenkins jenkins -s /bin/bash
+RUN groupadd --gid ${JENKINS_GID} jenkins \
+ && useradd --shell /bin/bash --create-home --password "" \
+      --comment "jenkins" --groups root \
+      --uid ${JENKINS_UID} --gid ${JENKINS_GID} jenkins
 
 # this special wrapper script runs sh inside of nix-shell
-ADD bash.sh /bin/bash
-
-WORKDIR /home/jenkins
-USER jenkins
-
+#ADD bash.sh /bin/bash
 ADD nix.conf /home/jenkins/.config/nix/nix.conf
 ADD default.nix /home/jenkins/default.nix
 ADD default.nix /bin/default.nix
 
-RUN ls -l /nix/var/nix/profiles/
-RUN ln -s /nix/var/nix/profiles/default ~/.nix-profile
-RUN nix-channel --add https://nixos.org/channels/nixos-19.03-small
-RUN nix-channel --update
-RUN nix-shell --run 'echo'
+RUN mkdir /nix
+
+RUN chown ${JENKINS_UID}:${JENKINS_GID} -R /nix /home/jenkins
+
+WORKDIR /home/jenkins
+USER jenkins
+
+RUN export USER=jenkins \
+ && /tmp/nix-install.sh \
+ && . ~/.nix-profile/etc/profile.d/nix.sh \
+ && nix-shell --run 'echo'
+
+# hack to avoid calling login
+ENV USER=jenkins
 
 MAINTAINER Jakub Sokolowski "jakub@status.im"
 LABEL description="Adjusted Nix Docker image for use with Jenkins"
-ENTRYPOINT ["/bin/bash"]

nix/Makefile

@@ -1,16 +1,25 @@
-NIX_VERSION = 2.2.1
 JENKINS_UID = 1001
 JENKINS_GID = 1001
 
-IMAGE_TAG = jenkins
+NIX_VERSION = 2.2.1
+NIX_INSTALL = nix-install-$(NIX_VERSION).sh
+NIX_SHA = 0039df605d2324f721f0c99ab76fc58fa60f791d84b30196eed805e8e65b1e51
+NIX_URL = https://nixos.org/releases/nix/nix-$(NIX_VERSION)/install
+
+IMAGE_TAG = ubuntu
 IMAGE_NAME = statusteam/nix:$(IMAGE_TAG)
 
-build:
+build: $(NIX_INSTALL)
 	docker build \
 		--build-arg="JENKINS_UID=$(JENKINS_UID)" \
 		--build-arg="JENKINS_GID=$(JENKINS_GID)" \
 		--build-arg="NIX_VERSION=$(NIX_VERSION)" \
 		-t $(IMAGE_NAME) .
 
+$(NIX_INSTALL):
+	wget -q "$(NIX_URL)" -O "$(NIX_INSTALL)"
+	echo "$(NIX_SHA)  $(NIX_INSTALL)" | sha256sum --check
+	chmod +x "$(NIX_INSTALL)"
+
 push: build
 	docker push $(IMAGE_NAME)