Dockerfile for building ROS from source

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I'm trying to put together a Dockerfilethat builds ROS Indigo (just ros_comm for now) from source. I'm more or less following the wiki page instructions: Installing from source

I'm running into multiple issues (e.g. running rosdep update without sudo) Before I start bombarding you with those (and posting code snippets), I thought I'd ask if someone already knows of a Dockerfile that does that. Please keep in mind that the emphasis is on building from source.

Some things I've found so far:

• https://github.com/osblinnikov/ros-do... (trick for running rosdep update without sudo)
• https://github.com/ruffsl/ubuntu-docker (looks useful, but not sure if it helps me)
• https://github.com/PabloGN/Docker-ras... (useful because my end goal is to make this an ARMhf image)

Related questions of mine:

• How to RUN rosdep init and update in Dockerfile
• What is the purpose of exec "$@" in ros_entrypoint.sh ?