Continuous Integration and Deployment with Middleman, Codeship, and GitHub Pages Dec 19, 2013

I use GitHub Pages for hosting some of my websites, and I use the Middleman static site generator as my content management system for some of these sites.

I like to run continuous integration for my projects whenever possible, and this goes for static site repositories as much as regular code repositories.

Recently, I started playing with Codeship. It’s a well-priced continuous integration and deployment service, and I wanted to be able to automatically deploy my middleman site upon successful builds to the master branch. It took a bit of trial and error, but I finally got something that works well.

Test Settings

After initializing a new GitHub repository in Codeship, you’ll need to define how tests are run. Under the Test project settings in Codeship, select Ruby as the language and define your Setup Commands and Test Commands.

Setup Commands:

bundle install

Test Commands:

bundle exec middleman build

Perfect. Now your site will run a test build upon every code push.

Deployment Settings

This is where I had some trouble, but I finally found a set of commands that correctly deloyed to our gh-pages branch in the repository. First, it’s worth mentioning that I use the middleman-gh-pages gem for deploying to the gh-pages branch. This gem gives you a rake publish task that handles most of the dirty work.

Under the Deployment project settings in Codeship, configure a deployment from the master branch using a Custom Script.

Custom Script:

git config --global ""
git config --global "Codeship Robot"
rm -rf build
git remote set-branches --add origin gh-pages
git fetch
bundle exec rake publish
sleep 30
wget --retry-connrefused --no-check-certificate -T 60

This configures a git user, removes the build directory that was left there from the test steps, adds a gh-pages remote branch (because Codeship only clones the relevant branch during setup), and runs the rake publish task to deploy the site to the gh-pages branch.

If all went well, your site will automatically deploy to GitHub Pages upon a push and successful build in the master branch.

GitHub Publishing Caveat

Make sure the email address that you use for this git user is a verified email address in your GitHub account. Otherwise, GitHub will accept the commit, but it will not publish the changes to your site. To fully make everything work, you will need to do one of two things: 1) Move the Codeship deploy key to an SSH key in your own GitHub account OR 2) Create a new machine user on GitHub and move the Codeship deploy key to an SSH key on that user account, give that machine user push/pull access to the repository, and make sure that machine user’s email address is fully verified by GitHub. I highly recommend going with option #2.

Extra Credit: Force Codeship to skip builds on the gh-pages branch.

Unfortunately, Codeship currently tries to run builds on all branches, including the gh-pages branch. This is undesirable for this setup, so to avoid this, we also need to add “–skip-ci” or “[skip ci]” to the commit message that is pushed to the gh-pages branch.

Fortunately, after this pull-request by yours truly, middleman-gh-pages can support that.

If using version >= 0.0.3 (or the master branch), you can add this to the bottom of your project’s Rakefile:

# Ensure builds are skipped when pushing to the gh-pages branch

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