Actually build and push the RVM-based images

Dockerfile

@@ -1,10 +1,9 @@
 FROM ubuntu:trusty
 
 # Grab the bare necessities for installing RVM and some Rubies
-RUN apt-get update && apt-get install -yq git build-essential curl gnupg
-# Accept mpapis' key so we can safely install RVM
-RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
-# Grab the latest stable version of RVM
-RUN curl -sSL https://get.rvm.io | bash -s stable
+RUN apt-get update && \
+    apt-get install -yq git build-essential curl gnupg && \
+    gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 && \
+    curl -sSL https://get.rvm.io | bash -s stable
 
 COPY rvmrc /root/.rvmrc

README.adoc

@@ -3,3 +3,16 @@
 This repository contains some `Dockerfile` code for building containers which
 come pre-baked with RVM for builds and tests in
 link:https://jenkins.io[Jenkins].
+
+
+== Tags
+
+The `rtyler/rvm` image alone is simply `ubuntu:trusty` with the latest stable
+link:http://rvm.io[RVM] installed on it. There are however additional tags with Rubies
+pre-installed:
+
+* `rtyler/rvm:2.3.0` - Ruby (MRI) 2.3.0
+* `rtyler/rvm:jruby` - JRuby, whichever version RVM aliases to
+* `rtyler/rvm:ruby-head` - Ruby (MRI)'s latest `HEAD` at the time of image
+  creation
+* `rtyler/rvm:rubinius` - Rubinius

build-rubies.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -x
+
+source ./rubies
+
+mkdir -p work
+
+for RUBY in "${RUBIES[@]}"; do
+    DOCKERFILE="work/dockerfile-${RUBY}"
+    cat > $DOCKERFILE <<EOF
+FROM rtyler/ci-rvm:latest
+
+RUN bash -c 'source /usr/local/rvm/scripts/rvm && rvm install ${RUBY}'
+EOF
+
+    echo "> Making ${IMAGE_TAG}:${RUBY}"
+    docker build --tag="${IMAGE_TAG}:${RUBY}" --file="${DOCKERFILE}" work
+
+    if [ -f "${DOCKERFILE}" ]; then
+        rm -f $DOCKERFILE
+    fi;
+done;

push-rubies.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -x
+
+source ./rubies
+
+for RUBY in "${RUBIES[@]}"; do
+    echo "> Pushing ${IMAGE_TAG}:${RUBY}"
+    docker push ${IMAGE_TAG}:${RUBY}
+done;

rubies

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+export RUBIES=( 2.3.0 jruby rubinius ruby-head)
+
+export IMAGE_TAG="rtyler/rvm"