github.phpd.cn/hashicorp/packer@v1.3.2/builder/amazon/common/regions.go (about)

     1  package common
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"github.com/aws/aws-sdk-go/service/ec2/ec2iface"
     7  )
     8  
     9  func listEC2Regions(ec2conn ec2iface.EC2API) ([]string, error) {
    10  	var regions []string
    11  	resultRegions, err := ec2conn.DescribeRegions(nil)
    12  	if err != nil {
    13  		return []string{}, err
    14  	}
    15  	for _, region := range resultRegions.Regions {
    16  		regions = append(regions, *region.RegionName)
    17  	}
    18  
    19  	return regions, nil
    20  }
    21  
    22  // ValidateRegion returns true if the supplied region is a valid AWS
    23  // region and false if it's not.
    24  func (c *AccessConfig) ValidateRegion(regions ...string) error {
    25  	ec2conn, err := c.NewEC2Connection()
    26  	if err != nil {
    27  		return err
    28  	}
    29  
    30  	validRegions, err := listEC2Regions(ec2conn)
    31  	if err != nil {
    32  		return err
    33  	}
    34  
    35  	var invalidRegions []string
    36  	for _, region := range regions {
    37  		found := false
    38  		for _, validRegion := range validRegions {
    39  			if region == validRegion {
    40  				found = true
    41  				break
    42  			}
    43  		}
    44  		if !found {
    45  			invalidRegions = append(invalidRegions, region)
    46  		}
    47  	}
    48  
    49  	if len(invalidRegions) > 0 {
    50  		return fmt.Errorf("Invalid region(s): %v", invalidRegions)
    51  	}
    52  	return nil
    53  }