Configure CircleCI

circle.yml

@@ -1,12 +1,18 @@
+machine:
+  environment:
+    PATH: "$HOME/.asdf/bin:$HOME/.asdf/shims:$PATH"
+
 dependencies:
   pre:
-    - script/ci/prepare.sh
+    - test/prepare_ci.sh
+    - "MIX_ENV=test mix deps.compile"
+    - "MIX_ENV=test mix compile"
   cache_directories:
-    - ~/dependencies
-    - ~/.mix
-    - _build
+    - ~/.asdf
     - deps
+    - _build
 
 test:
   override:
-    - script/ci/tests.sh
+    - mix test
+    - mix credo --strict

elixir_buildpack.config

@@ -0,0 +1,2 @@
+erlang_version=18.3
+elixir_version=1.3.1

test/prepare_ci.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+# ensure exit codes other than 0 fail the build
+set -e
+
+# asdf
+# -- install if not installed before
+# -- add plugins if not added before
+function asdfPlugin {
+  asdf plugin-add $1 https://github.com/HashNuke/asdf-$1.git
+}
+
+# Set up Figaro environment variables
+# This line can be removed if our PR to FigaroElixir is accepted:
+# https://github.com/KamilLelonek/figaro-elixir/pull/1
+touch $HOME/$CIRCLE_PROJECT_REPONAME/config/application.yml
+
+if ! asdf | grep version; then git clone https://github.com/HashNuke/asdf.git ~/.asdf; fi
+if ! asdf plugin-list | grep erlang; then $(asdfPlugin "erlang"); fi
+if ! asdf plugin-list | grep elixir; then $(asdfPlugin "elixir"); fi
+
+# extract vars from elixir_buildpack.config
+. elixir_buildpack.config
+
+# write .tool-versions
+if [ ! -f .tool-versions ]; then
+  echo "erlang $erlang_version" >> .tool-versions
+  echo "elixir $elixir_version" >> .tool-versions
+fi
+
+# install erlang/elixir
+asdf install erlang $erlang_version
+asdf install elixir $elixir_version
+
+# get dependencies
+if [ ! -e $HOME/.mix/rebar ]; then
+  yes | mix local.rebar
+fi
+
+yes | mix deps.get
+
+# exit successfully
+exit 0