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This has the potential to speed up rebuilds of the Atlantis container significantly, especially for non-x86 platforms which are emulated when done in GitHub Actions. It works by using cache mounts: https://docs.docker.com/engine/reference/builder/#run---mounttypecache. They mean we can have specific paths set that are carried over from one image build to the next, regardless of which files are changed in the project. The files are however at the same time not part of the final image, which reduces the generated "builder" image from 1.66 GB to just 386 MB on the current main branch. In my local tests, which doesn't make use of emulation, I saw a drop for the "go build" step going from taking just over 40 seconds with an empty cache to around 1 second when I make a one character change to a Go source file. That is otherwise a change that prior to this would cause a complete rebuild of the Docker image layer. Co-authored-by: nitrocode <7775707+nitrocode@users.noreply.github.com>
Atlantis

Terraform Pull Request Automation
Resources
- How to get started: www.runatlantis.io/guide
- Full documentation: www.runatlantis.io/docs
- Download the latest release: github.com/runatlantis/atlantis/releases/latest
- Get help in our Slack channel
- Start Contributing: CONTRIBUTING.md
What is Atlantis?
A self-hosted golang application that listens for Terraform pull request events via webhooks.
What does it do?
Runs terraform plan and apply remotely and comments back on the pull request with the output.
Why should you use it?
- Make Terraform changes visible to your whole team.
- Enable non-operations engineers to collaborate on Terraform.
- Standardize your Terraform workflows.