googleapi: Error 400: Invalid value for field 'region': 'global'. Unknown region., invalid when running import google without regions flag

[Shion1305]

When running terraformer import google without the regions flag, the following error appears in the log:

2024/09/29 03:03:13 googleapi: Error 400: Invalid value for field 'region': 'global'. Unknown region., invalid

Although this error doesn't stop the command from completing successfully, it's misleading and could cause confusion for users.

Cause:

The issue arises because, if the regions flag is not set, global is used as the default value for the region. However, global is not a valid region for this API call:

regionsGetCall := computeService.Regions.Get(project, regionName).Fields("name", "zones")

This call triggers the following gRPC API request:

GET https://compute.googleapis.com/compute/v1/projects/{project}/regions/{region}

Since global is not a recognized region, the API responds with an error.

Proposed Solution:

To fix this, the code should handle the case when the region is set to global by skipping the API call. This could be implemented by adding a conditional check in the getRegion function:

func getRegion(project, regionName string) *compute.Region {
	if regionName == "global" {
		return &compute.Region{}
	}
	computeService, err := compute.NewService(context.Background())
	if err != nil {
		log.Println(err)
		return &compute.Region{}
	}
	regionsGetCall := computeService.Regions.Get(project, regionName).Fields("name", "zones")
	region, err := regionsGetCall.Do()
	if err != nil {
		log.Println(err)
		return &compute.Region{}
	}
	return region
}

By making this change, the error message will no longer appear when global is used as the default region, and it will prevent unnecessary API requests.

Additional Information:

• This issue only occurs when the regions flag is not provided.
• The error message does not affect the overall functionality of the command.