forked from hashicorp/packer
/
regions.go
53 lines (45 loc) · 1.06 KB
/
regions.go
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package common
import (
"fmt"
"github.com/aws/aws-sdk-go/service/ec2/ec2iface"
)
func listEC2Regions(ec2conn ec2iface.EC2API) ([]string, error) {
var regions []string
resultRegions, err := ec2conn.DescribeRegions(nil)
if err != nil {
return []string{}, err
}
for _, region := range resultRegions.Regions {
regions = append(regions, *region.RegionName)
}
return regions, nil
}
// ValidateRegion returns true if the supplied region is a valid AWS
// region and false if it's not.
func (c *AccessConfig) ValidateRegion(regions ...string) error {
ec2conn, err := c.NewEC2Connection()
if err != nil {
return err
}
validRegions, err := listEC2Regions(ec2conn)
if err != nil {
return err
}
var invalidRegions []string
for _, region := range regions {
found := false
for _, validRegion := range validRegions {
if region == validRegion {
found = true
break
}
}
if !found {
invalidRegions = append(invalidRegions, region)
}
}
if len(invalidRegions) > 0 {
return fmt.Errorf("Invalid region(s): %v", invalidRegions)
}
return nil
}