github-action-atmos-affected

A GitHub Action to get a list of affected atmos stacks for a pull request

---

Note

This project is part of Cloud Posse's comprehensive "SweetOps" approach towards DevOps.

Learn More

It's 100% Open Source and licensed under the APACHE2.

Introduction

This is a GitHub Action to get a list of affected atmos stacks for a pull request. It optionally installs atmos and jq and runs atmos describe affected to get the list of affected stacks. It provides the raw list of affected stacks as an output as well as a matrix that can be used further in GitHub action jobs.

Usage

Config

The action expects the atmos configuration file atmos.yaml to be present in the repository. The config should have the following structure:

integrations:
  github:
    gitops:
      terraform-version: 1.5.2
      infracost-enabled: false
      artifact-storage:
        region: us-east-2
        bucket: cptest-core-ue2-auto-gitops
        table: cptest-core-ue2-auto-gitops-plan-storage
        role: arn:aws:iam::xxxxxxxxxxxx:role/cptest-core-ue2-auto-gitops-gha
      role:
        plan: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
        apply: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
      matrix:
        sort-by: .stack_slug
        group-by: .stack_slug | split("-") | [.[0], .[2]] | join("-")

Important

Please note! This GitHub Action only works with atmos >= 1.63.0. If you are using atmos < 1.63.0 please use v2 version of this action.

Workflow example

  name: Pull Request
  on:
    pull_request:
      branches: [ 'main' ]
      types: [opened, synchronize, reopened, closed, labeled, unlabeled]

  jobs:
    context:
      runs-on: ubuntu-latest
      steps:
        - uses: actions/checkout@v3
        - id: affected
          uses: cloudposse/github-action-atmos-affected-stacks@v3
          with:
            atmos-config-path: ./rootfs/usr/local/etc/atmos/
            atmos-version: 1.63.0
            nested-matrices-count: 1

      outputs:
        affected: ${{ steps.affected.outputs.affected }}
        matrix: ${{ steps.affected.outputs.matrix }}

    atmos-plan:
      needs: ["atmos-affected"]
      if: ${{ needs.atmos-affected.outputs.has-affected-stacks == 'true' }}
      name: ${{ matrix.stack_slug }}
      runs-on: ['self-hosted']
      strategy:
        max-parallel: 10
        fail-fast: false # Don't fail fast to avoid locking TF State
        matrix: ${{ fromJson(needs.atmos-affected.outputs.matrix) }}
      ## Avoid running the same stack in parallel mode (from different workflows)
      concurrency:
        group: ${{ matrix.stack_slug }}
        cancel-in-progress: false
      steps:
        - name: Plan Atmos Component
          uses: cloudposse/github-action-atmos-terraform-plan@v1
          with:
            component: ${{ matrix.component }}
            stack: ${{ matrix.stack }}

Migrating from v2 to v3

The notable changes in v3 are:

• v3 works only with atmos >= 1.63.0
• v3 drops install-terraform input because terraform is not required for affected stacks call
• v3 drops atmos-gitops-config-path input and the ./.github/config/atmos-gitops.yaml config file. Now you have to use GitHub Actions environment variables to specify the location of the atmos.yaml.

The following configuration fields now moved to GitHub action inputs with the same names

name
atmos-version
atmos-config-path

The following configuration fields moved to the atmos.yaml configuration file.

name	YAML path in atmos.yaml
aws-region	integrations.github.gitops.artifact-storage.region
terraform-state-bucket	integrations.github.gitops.artifact-storage.bucket
terraform-state-table	integrations.github.gitops.artifact-storage.table
terraform-state-role	integrations.github.gitops.artifact-storage.role
terraform-plan-role	integrations.github.gitops.role.plan
terraform-apply-role	integrations.github.gitops.role.apply
terraform-version	integrations.github.gitops.terraform-version
enable-infracost	integrations.github.gitops.infracost-enabled
sort-by	integrations.github.gitops.matrix.sort-by
group-by	integrations.github.gitops.matrix.group-by

For example, to migrate from v2 to v3, you should have something similar to the following in your atmos.yaml:

./.github/config/atmos.yaml

# ... your existing configuration

integrations:
  github:
    gitops:
      terraform-version: 1.5.2
      infracost-enabled: false
      artifact-storage:
        region: us-east-2
        bucket: cptest-core-ue2-auto-gitops
        table: cptest-core-ue2-auto-gitops-plan-storage
        role: arn:aws:iam::xxxxxxxxxxxx:role/cptest-core-ue2-auto-gitops-gha
      role:
        plan: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
        apply: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
      matrix:
        sort-by: .stack_slug
        group-by: .stack_slug | split("-") | [.[0], .[2]] | join("-")

.github/workflows/main.yaml

  - id: affected
    uses: cloudposse/github-action-atmos-affected-stacks@v3
    with:
      atmos-config-path: ./rootfs/usr/local/etc/atmos/
      atmos-version: 1.63.0

This corresponds to the v2 configuration (deprecated) below.

The v2 configuration file ./.github/config/atmos-gitops.yaml looked like this:

atmos-version: 1.45.3
atmos-config-path: ./rootfs/usr/local/etc/atmos/
terraform-state-bucket: cptest-core-ue2-auto-gitops
terraform-state-table: cptest-core-ue2-auto-gitops
terraform-state-role: arn:aws:iam::xxxxxxxxxxxx:role/cptest-core-ue2-auto-gitops-gha
terraform-plan-role: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
terraform-apply-role: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
terraform-version: 1.5.2
aws-region: us-east-2
enable-infracost: false
sort-by: .stack_slug
group-by: .stack_slug | split("-") | [.[0], .[2]] | join("-")  

And the v2 GitHub Action Workflow looked like this.

.github/workflows/main.yaml

  - id: affected
    uses: cloudposse/github-action-atmos-affected-stacks@v2
    with:
      atmos-gitops-config-path: ./.github/config/atmos-gitops.yaml

Migrating from v1 to v2

v2 moves most of the inputs to the Atmos GitOps config path ./.github/config/atmos-gitops.yaml. Simply create this file, transfer your settings to it, then remove the corresponding arguments from your invocations of the cloudposse/github-action-atmos-affected-stacks action.

name
atmos-version
atmos-config-path
terraform-state-bucket
terraform-state-table
terraform-state-role
terraform-plan-role
terraform-apply-role
terraform-version
aws-region
enable-infracost

If you want the same behavior in v2 as in v1 you should create config ./.github/config/atmos-gitops.yaml with the same variables as in v1 inputs.

  - name: Determine Affected Stacks
    uses: cloudposse/github-action-atmos-affected-stacks@v2
    id: affected
    with:
      atmos-gitops-config-path: ./.github/config/atmos-gitops.yaml
      nested-matrices-count: 1

Which would produce the same behavior as in v1, doing this:

  - name: Determine Affected Stacks
    uses: cloudposse/github-action-atmos-affected-stacks@v1
    id: affected
    with:
      atmos-version: 1.45.3
      atmos-config-path: ./rootfs/usr/local/etc/atmos/
      terraform-state-bucket: cptest-core-ue2-auto-gitops
      terraform-state-table: cptest-core-ue2-auto-gitops
      terraform-state-role: arn:aws:iam::xxxxxxxxxxxx:role/cptest-core-ue2-auto-gitops-gha
      terraform-plan-role: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
      terraform-apply-role: arn:aws:iam::yyyyyyyyyyyy:role/cptest-core-gbl-identity-gitops
      terraform-version: 1.5.2
      aws-region: us-east-2
      enable-infracost: false

Inputs

Name	Description	Default	Required
atmos-config-path	The path to the atmos.yaml file	N/A	true
atmos-include-spacelift-admin-stacks	Whether to include the Spacelift admin stacks of affected stacks in the output	false	false
atmos-version	The version of atmos to install	>= 1.63.0	false
base-ref	The base ref to checkout. If not provided, the head default branch is used.	N/A	false
default-branch	The default branch to use for the base ref.	${{ github.event.repository.default_branch }}	false
head-ref	The head ref to checkout. If not provided, the head default branch is used.	${{ github.sha }}	false
install-atmos	Whether to install atmos	true	false
install-jq	Whether to install jq	false	false
jq-force	Whether to force the installation of jq	true	false
jq-version	The version of jq to install if install-jq is true	1.6	false
nested-matrices-count	Number of nested matrices that should be returned as the output (from 1 to 3)	2	false

Outputs

Name	Description
affected	The affected stacks
has-affected-stacks	Whether there are affected stacks
matrix	The affected stacks as matrix structure suitable for extending matrix size workaround (see README)

Related Projects

Check out these related projects.

References

For additional context, refer to some of these links.

✨ Contributing

This project is under active development, and we encourage contributions from our community. Many thanks to our outstanding contributors:

🐛 Bug Reports & Feature Requests

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💻 Developing

If you are interested in being a contributor and want to get involved in developing this project or help out with Cloud Posse's other projects, we would love to hear from you! Hit us up in Slack, in the #cloudposse channel.

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

1. Review our Code of Conduct and Contributor Guidelines.
2. Fork the repo on GitHub
3. Clone the project to your own machine
4. Commit changes to your own branch
5. Push your work back up to your fork
6. Submit a Pull Request so that we can review your changes

NOTE: Be sure to merge the latest changes from "upstream" before making a pull request!

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About

This project is maintained by Cloud Posse, LLC.

We are a DevOps Accelerator for funded startups and enterprises. Use our ready-to-go terraform architecture blueprints for AWS to get up and running quickly. We build it with you. You own everything. Your team wins. Plus, we stick around until you succeed.

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License

Preamble to the Apache License, Version 2.0

Complete license is available in the LICENSE file.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

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KIND, either express or implied.  See the License for the
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