add modified nix image for use with jenkins

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

nix/Dockerfile

@@ -0,0 +1,20 @@
+ARG NIX_VERSION
+FROM nixos/nix:${NIX_VERSION}
+
+ARG JENKINS_UID
+ARG JENKINS_GID
+
+RUN addgroup -g ${JENKINS_GID} jenkins \
+ && adduser -D -u ${JENKINS_UID} -G jenkins jenkins \
+      -s /nix/var/nix/profiles/default/bin/nix-shell \
+ && chown jenkins:jenkins -R /nix
+
+ADD nix.conf /home/jenkins/.config/nix/nix.conf
+ADD default.nix home/jenkins/default.nix
+
+WORKDIR /home/jenkins
+
+USER jenkins
+
+MAINTAINER Jakub Sokolowski "jakub@status.im"
+LABEL description="Adjusted Nix Docker image for use with Jenkins"

nix/Makefile

@@ -0,0 +1,16 @@
+NIX_VERSION = 2.2.1
+JENKINS_UID = 1001
+JENKINS_GID = 1001
+
+IMAGE_TAG = jenkins
+IMAGE_NAME = statusteam/nix:$(IMAGE_TAG)
+
+build:
+	docker build --squash=true \
+		--build-arg="JENKINS_UID=$(JENKINS_UID)" \
+		--build-arg="JENKINS_GID=$(JENKINS_GID)" \
+		--build-arg="NIX_VERSION=$(NIX_VERSION)" \
+		-t $(IMAGE_NAME) .
+
+push: build
+	docker push $(IMAGE_NAME)

nix/default.nix

@@ -0,0 +1,9 @@
+with import <nixpkgs> { };
+stdenv.mkDerivation rec {
+  name = "env";
+  env = buildEnv { name = name; paths = buildInputs; };
+  buildInputs = with pkgs; [
+    bash
+    wget
+  ];
+}

nix/nix.conf

@@ -0,0 +1,2 @@
+extra-substituters = https://nix-cache.status.im
+trusted-public-keys = nix-cache.status.im-1:x/93lOfLU+duPplwMSBR+OlY4+mo+dCN7n0mr4oPwgY= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=