From 0717b9c3c482993b413c91f9e4c7cffdedaceb79 Mon Sep 17 00:00:00 2001
From: Izel Nakri <contact@izelnakri.com>
Date: Sun, 1 Mar 2020 07:17:50 +0100
Subject: [PATCH] highly optimized elixir container builds

---
 Dockerfile          | 20 ++++++++++++++++----
 docker-compose.yaml |  5 ++---
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 1985c629..aac0264a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,28 @@
 FROM "elixir:1.10.1-alpine"
 
+ARG MIX_ENV=dev
+ENV MIX_ENV=$MIX_ENV
+
 WORKDIR /code/
 
-RUN mix local.hex --force && mix local.rebar --force
+RUN echo "y" | mix local.hex --if-missing && echo "y" | mix local.rebar --if-missing
+
+ADD ["mix.lock", "mix.exs", "/code/"]
+
+RUN mix deps.get && MIX_ENV=test mix deps.compile && \
+  MIX_ENV=$MIX_ENV mix deps.compile
+
+ADD ["config", "lib", "priv", "/code/"]
+
+RUN MIX_ENV=$MIX_ENV mix compile
 
-COPY ["mix.lock", "mix.exs", "/code/"]
+ADD ["test", "/code/"]
 
-RUN mix deps.get
+RUN MIX_ENV=test mix compile && MIX_ENV=$MIX_ENV mix compile
 
 ADD . /code/
 
-RUN mix compile
+RUN MIX_ENV=test mix compile && MIX_ENV=$MIX_ENV mix compile
 
 CMD ["/bin/sh"]
 
diff --git a/docker-compose.yaml b/docker-compose.yaml
index b6b9db27..e62e5ff7 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -16,6 +16,8 @@ services:
     build:
       context: .
       dockerfile: Dockerfile
+      cache_from:
+        - inakri/paper_trail:$CIRCLE_BRANCH
     environment:
       POSTGRES_USER: $POSTGRES_USER
       POSTGRES_PASSWORD: $POSTGRES_PASSWORD
@@ -35,6 +37,3 @@ networks:
   backend_network:
     driver: bridge
 
-# cache_from:
-#   - $BASE_IMAGE
-#   - $BACKEND_IMAGE_CACHE