feat: Allows setting the provider host and authorisation_token via CAPELLA prefixed environment variables

[cdsre]

Jira

• AV-XXXXX
• Resolves Feature: Allow provider config to be set from environment variables. #238

Description

Please include a summary of the fix/feature/change, including any relevant motivation and context.

Updates the provider to allow setting of the host and authorisation_token as environment variables prefixed with CAPELLA_ and removes authorisation_token as a required attribute in the configuration block as it can now be provided from an environment variable

Type of Change

• Bug fix (non-breaking change which fixes an issue). Please, add the "bug" label to the PR.
• New feature (non-breaking change which adds functionality). Please, add the "enhancement" label to the PR.
• Breaking change (fix or feature that would cause existing functionality to not work as expected). Please, add the "breaking change" label to the PR.
• This change requires a documentation update
• Documentation fix/enhancement

Manual Testing Approach

How was this change tested and do you have evidence? (REQUIRED: Select at least 1)

• Manually tested
• Unit tested
• Acceptance tested
• Unable to test / will not test (Please provide comments in section below)

Testing

Testing

Example terraform code

terraform {
  required_providers {
    couchbase-capella = {
      source = "couchbasecloud/couchbase-capella"
    }
  }
}

data "couchbase-capella_projects" "this" {
  organization_id = "e5456751-XXXXXXXXXXXXXX-aecb859d7db0"
}

output "clusters_list" {
  value = "Number of current projects: ${length(data.couchbase-capella_projects.this.data)}"
}

Execution

$ export CAPELLA_AUTHENTICATION_TOKEN=UTZFcXXXXXXXXXXXXXXXXXXXXXXXGV0WQ==
$ terraform apply --auto-approve
╷
│ Warning: Provider development overrides are in effect
│
│ The following provider development overrides are set in the CLI configuration:
│  - couchbasecloud/couchbase-capella in C:\Users\CDoyle\go\bin
│
│ The behavior may therefore not match any released version of the provider and applying changes may cause the state to become incompatible with published releases.
╵
data.couchbase-capella_projects.this: Reading...
data.couchbase-capella_projects.this: Read complete after 0s

Changes to Outputs:
  + clusters_list = "Number of current projects: 1"

You can apply this plan to save these new output values to the Terraform state, without changing any real infrastructure.

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

clusters_list = "Number of current projects: 1"

Without using a provider block in the terraform code and setting only the CAPELLA_AUTHORISATION_TOKEN the provider still successfully interacts with the API and retrieves project details.

Required Checklist:

• I have checked that this change does not generate any credentials and that they are NOT accidentally logged anywhere.
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if required)
• I have run make fmt and formatted my code
• I have made sure that no schema field is marked with both requiresReplace and computed

Further comments

The make fmt has formatted the internal/schema/cluster.go There is no functional change here other than the go formatter passing the spaces.