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My goal is to enable you to apply this useful technique to your own projects — by using the right tools for the job and combining them in the best possible way. The goal of chef-runner is to speed up development and testing of Chef cookbooks. I originally developed the tool as a fast alternative to the painfully slow vagrant provision command.
One of the things chef-runner can do is to install Chef on a machine before provisioning it. This makes it possible to set up bare servers that have nothing installed but the base operating system. For this feature, chef-runner used to download the Omnibus installer — better known as install.
The result will be a fully stand-alone binary that can be deployed just as easily as any other Go program. For this, all I had to do was download the installer script once and then invoke the go-bindata command-line tool for generating Go code from it. The exact steps are as follows:. Asset data can be accessed via the Asset function, which is included in the generated assets. The resulting code ended up looking like this:.
One possible workaround is to store assets in a separate package. While tools like go-bindata are valuable on their own, you still need to integrate them into your build process. For this, you might consider using a build tool like Make to glue all the pieces together.
The tool works by scanning Go source code for special comments that define commands to run. This way you can declare build instructions in your code, keeping everything together in a nice way. The -x flag causes go generate to print commands as they are executed. The one command shown above should look familiar.
As with most Go tools, you can run go generate. There is one thing you need to be aware of when using go generate , though. For more detailed information on go generate , consult go help generate or, better yet, read this article on the Go blog. All in all, embedding assets in Go is straight forward thanks to existing tooling.
Last but not least, in one of my other open-source projects, I used a Python script to generate a Go map of distributions supported by Packagecloud. By doing so before compilation, I managed to save a rather expensive API call that would otherwise be made at runtime. Over 60, people from companies like Netflix, Apple, Spotify and O'Reilly are reading our articles.
Subscribe to receive a weekly newsletter with articles around Continuous Integration, Docker, and software development best practices. Thanks for the tip on go: This is especially true if they are large. I am not sure how well it will work with existing tooling and infrastructure either. It could be more difficult to deploy software when you embed many assets into a program. I was looking for a tool like go-bindata but I wanted something simpler: So I did what any gopher would do, take this opportunity to write my own bindata tool!
Took a look at go. It falls back to read from disk instead of requiring that you go generate each time. Embedding Assets in Go Last updated: We promise that we won't spam you. You can unsubscribe any time. Join the Discussion Leave us some comments on what you think about this topic or if you like to add something. Grrr, I wish I could edit the formatting… Sorry about that. I was looking for such a tool. Thank you so much.