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30 changes: 30 additions & 0 deletions ibm/provider/provider.go
Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,18 @@ import (
"github.com/IBM-Cloud/terraform-provider-ibm/ibm/validate"
)

var regionLocationMap = map[string]struct{}{
"au-syd": {},
"ca-tor": {},
"eu-de": {},
"eu-gb": {},
"jp-tok": {},
"jp-osa": {},
"us-east": {},
"us-south": {},
"br-sao": {},
}

// Provider returns a *schema.Provider.
func Provider() *schema.Provider {
provider := schema.Provider{
Expand Down Expand Up @@ -2415,6 +2427,11 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
if err != nil {
return nil, err
}

if isRegionValid(region) == false {
return nil, fmt.Errorf("[ERROR] Provider region %q is not supported. Valid provider region(s) are: %q", region, getRegionNames())
}

// Set environment variable to be used in DiffSupressFunction
if wskEnvVal.(string) == "" {
os.Setenv("FUNCTION_NAMESPACE", wskNameSpace)
Expand Down Expand Up @@ -2444,3 +2461,16 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {

return config.ClientSession()
}

func isRegionValid(region string) bool {
_, exists := regionLocationMap[region]
return exists
}

func getRegionNames() []string {
regions := make([]string, 0, len(regionLocationMap))
for region := range regionLocationMap {
regions = append(regions, region)
}
return regions
}