expose-host-agent

expose-host-agent is a small wrapper designed to be used around docker build that does the necessary dance with your local SSH agent to allow the build to pull content from private git repositories.

Docker commands that need access to private git repositories can then be prepended with with-host-agent.

Installation

brew tap gocardless/homebrew-taps
brew install expose-host-agent

Usage

It runs whatever arguments you give it as a command, so you can use docker build as normal.

To use expose-host-agent, simply wrap normal Docker commands in it like this:

expose-host-agent docker build -t test_build

Instead of your image failing to build, you should now see something like:

Step 16/16 : RUN with-host-agent git clone git@github.com:gocardless/must-have-private-dependency.git

---> Running in 2d630d625583

192.168.65.2    host.docker.internal

Cloning into 'must-have-private-dependency'...

Warning: Permanently added the RSA host key for IP address '140.82.118.4' to the list of known hosts.

Removing intermediate container 2d630d625583

---> 3370566db8f1

Successfully built 3370566db8f1

Et voilà!