If you maintain more than one Puppet module, you’ve probably spent some time aligning changes in your general setup by hand – rspec helpers, Gemfile, Rakefile, your travis config, etc. Once you have a third or a fourth module, you find that does not scale. Thankfully, there’s a great tool to help automate this: Modulesync.

How It Works

We’ll discuss how modulesync works first, so that we understand how to set it up. For instance, to perform a dry run, you would run msync update –noop in a modulesync configuration repo. This creates a directory modules and clones the managed modules into that directory. For each module, it then describes the diffs between the existing contents of the module and the config defined by the modulesync configuration repo. Once the changes are reviewed for accuracy, run msync update -m “Commit message here” and the diffs are applied to the default branch (master) with the commit message specified. By creating a modulesync.yml file, the default namespace and branch can be specified. The use of a different branch name allows you to create a PR to apply the changes.

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