forked from viliproject/vili
/
ecr.go
186 lines (165 loc) · 4.56 KB
/
ecr.go
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package docker
import (
"errors"
"strconv"
"strings"
"sync"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ecr"
)
// ECRConfig is the ECR service configuration
type ECRConfig struct {
Region string
AccessKeyID string
SecretAccessKey string
Namespace string
BranchDelimiter string
RegistryID *string
}
// ECRService is an implementation of the docker Service interface
// It fetches docker images
type ECRService struct {
config *ECRConfig
ecr *ecr.ECR
}
func newECR(c *ECRConfig) *ECRService {
awsConfig := aws.NewConfig()
creds := credentials.NewChainCredentials([]credentials.Provider{
&credentials.StaticProvider{
Value: credentials.Value{
AccessKeyID: c.AccessKeyID,
SecretAccessKey: c.SecretAccessKey,
},
},
&credentials.EnvProvider{},
&credentials.SharedCredentialsProvider{},
&ec2rolecreds.EC2RoleProvider{Client: ec2metadata.New(session.New())},
})
awsConfig.WithCredentials(creds)
awsConfig.WithRegion(c.Region)
return &ECRService{
config: c,
ecr: ecr.New(session.New(awsConfig)),
}
}
// InitECR initializes the docker registry service
func InitECR(c *ECRConfig) error {
service = newECR(c)
return nil
}
// GetRepository implements the Service interface
func (s *ECRService) GetRepository(repo string, branches []string) ([]*Image, error) {
var waitGroup sync.WaitGroup
imagesChan := make(chan getImagesResult, len(branches))
for _, branch := range branches {
waitGroup.Add(1)
go func(branch string) {
defer waitGroup.Done()
images, err := s.getImagesForBranch(repo, branch)
imagesChan <- getImagesResult{images: images, err: err}
}(branch)
}
waitGroup.Wait()
close(imagesChan)
var images []*Image
var err error
for result := range imagesChan {
if result.err != nil {
err = result.err
}
images = append(images, result.images...)
}
if len(images) == 0 && err != nil {
return nil, err
}
sortByLastModified(images)
return images, nil
}
// GetTag implements the Service interface
func (s *ECRService) GetTag(repo, branch, tag string) (string, error) {
fullRepoName := s.getRepositoryForBranch(repo, branch)
resp, err := s.ecr.BatchGetImage(&ecr.BatchGetImageInput{
ImageIds: []*ecr.ImageIdentifier{
{
ImageTag: aws.String(tag),
},
},
RepositoryName: aws.String(fullRepoName),
RegistryId: s.config.RegistryID,
})
if err != nil {
return "", err
}
if len(resp.Failures) > 0 {
return "", errors.New(*resp.Failures[0].FailureReason)
}
return *resp.Images[0].ImageId.ImageDigest, nil
}
// FullName implements the Service interface
func (s *ECRService) FullName(repo, branch, tag string) (string, error) {
resp, err := s.ecr.DescribeRepositories(&ecr.DescribeRepositoriesInput{
RepositoryNames: []*string{
aws.String(s.getRepositoryForBranch(repo, branch)),
},
RegistryId: s.config.RegistryID,
})
if err != nil {
return "", err
}
if len(resp.Repositories) < 1 {
return "", errors.New("Repository not found")
}
return *resp.Repositories[0].RepositoryUri + ":" + tag, nil
}
func (s *ECRService) getImagesForBranch(repoName, branchName string) ([]*Image, error) {
fullRepoName := s.getRepositoryForBranch(repoName, branchName)
var images []*Image
var nextToken *string
for {
resp, err := s.ecr.ListImages(&ecr.ListImagesInput{
RepositoryName: aws.String(fullRepoName),
NextToken: nextToken,
RegistryId: s.config.RegistryID,
})
if err != nil {
return images, err
}
for _, imageID := range resp.ImageIds {
if imageID.ImageTag != nil {
image := &Image{
Tag: *imageID.ImageTag,
Branch: branchName,
}
sepIndex := strings.LastIndex(*imageID.ImageTag, "-")
if sepIndex != -1 {
dateComponent, shaComponent := (*imageID.ImageTag)[:sepIndex], (*imageID.ImageTag)[sepIndex+1:]
unixSecs, err := strconv.ParseInt(dateComponent, 10, 0)
if err != nil {
continue
}
image.Revision = shaComponent
image.LastModified = time.Unix(unixSecs, 0)
}
images = append(images, image)
}
}
if resp.NextToken == nil {
return images, nil
}
nextToken = resp.NextToken
}
}
func (s *ECRService) getRepositoryForBranch(repoName, branchName string) string {
if s.config.Namespace != "" {
repoName = s.config.Namespace + "/" + repoName
}
if branchName == "master" {
return repoName
}
return repoName + s.config.BranchDelimiter + strings.ToLower(branchName)
}