From 6c564dc7b27d1d23a04a09d699f6c28d2d2e1f17 Mon Sep 17 00:00:00 2001
From: Dany Marcoux <dmarcoux@posteo.de>
Date: Sun, 7 Jun 2020 23:29:12 +0200
Subject: [PATCH 1/2] Shallow clone specific release for rbenv and ruby-build

We don't need the whole git history, so doing a shallow clone is
favourable. Cloning a specific release (the latest at the time of
writing this) allows us to have reproducible results since we're not
cloning whatever is on master at the time of building the Docker image.
---
 Dockerfile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 202bbeccf7..49f0fa4838 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,8 +13,8 @@ WORKDIR /usr/src/app
 COPY .ruby-version .
 
 # Install Rbenv & Ruby
-RUN git clone https://github.com/rbenv/rbenv.git ${RBENV_ROOT} && \
-    git clone https://github.com/rbenv/ruby-build.git ${RBENV_ROOT}/plugins/ruby-build && \
+RUN git clone --depth 1 --branch v1.1.2 https://github.com/rbenv/rbenv.git ${RBENV_ROOT} && \
+    git clone --depth 1 --branch v20200520 https://github.com/rbenv/ruby-build.git ${RBENV_ROOT}/plugins/ruby-build && \
     ${RBENV_ROOT}/plugins/ruby-build/install.sh && \
     echo 'eval "$(rbenv init -)"' >> /etc/profile.d/rbenv.sh && \
     rbenv install $(cat .ruby-version) && \

From a751d24562fb532148a8f7c007e43fded4e85b3e Mon Sep 17 00:00:00 2001
From: Dany Marcoux <dmarcoux@posteo.de>
Date: Sun, 7 Jun 2020 23:32:46 +0200
Subject: [PATCH 2/2] Run bundler install in parallel with the amount of
 available CPUs

---
 Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 49f0fa4838..c30df2f92f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,4 +43,5 @@ RUN wget https://chromedriver.storage.googleapis.com/2.41/chromedriver_linux64.z
 
 # Copy code and install app dependencies
 COPY . /usr/src/app/
-RUN bundle install
+# Run bundler install in parallel with the amount of available CPUs
+RUN bundle install --jobs="$(nproc)"