feat: add atlantis cancel command to cancel queued operations

[bschaatsbergen]

No description provided.

[ramonvermeulen]

Did some manual testing for this:

Cancelling a plan

Used atlantis.yaml configuration:

version: 3
automerge: true
parallel_plan: false
parallel_apply: false
projects:
  - name: atlantis-test-suite-a
    dir: .
    workspace: default-a
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
  - name: atlantis-test-suite-b
    dir: .
    workspace: default-b
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
  - name: atlantis-test-suite-c
    dir: .
    workspace: default-c
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
  - name: atlantis-test-suite-d
    dir: .
    workspace: default-d
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
  - name: atlantis-test-suite-e
    dir: .
    workspace: default-e
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true

Cancelling a running apply

Used the same atlantis.yaml configuration, used the time provider for a random sleep during apply:

provider "random" {}
provider "time" {}

resource "time_sleep" "wait_30_seconds" {
  depends_on = [random_password.password]

  create_duration = "30s"
}

resource "random_password" "password" {
  length           = 26
  special          = true
  override_special = "!#$%&*()-_=+[]{}<>:?"
}

output "random_password" {
  value     = random_password.password.bcrypt_hash
  sensitive = true
}

I commented atlantis cancel during the execution of project atlantis-test-suite-c.

Cancel with execution order groups during apply

I used the following atlantis.yaml configuration:

version: 3
automerge: true
parallel_plan: false
parallel_apply: true
projects:
  - name: atlantis-test-suite-a
    dir: .
    workspace: default-a
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
    execution_order_group: 1
  - name: atlantis-test-suite-b
    dir: .
    workspace: default-b
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
    execution_order_group: 1
  - name: atlantis-test-suite-c
    dir: .
    workspace: default-c
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
    execution_order_group: 2
  - name: atlantis-test-suite-d
    dir: .
    workspace: default-d
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
    execution_order_group: 2
  - name: atlantis-test-suite-e
    dir: .
    workspace: default-e
    terraform_version: v1.12.2
    autoplan:
      when_modified: ["*.tf"]
      enabled: true
    execution_order_group: 3

I did an atlantis apply directly followed by an atlantis cancel resulting in only the first execution order group (containing atlantis-test-suite-a and atlantis-test-suite-b) to finish. The rest got cancelled.

And another example where I commented atlantis cancel during the execution of the 2nd order group so only the last (3rd) did not get applied: