/
client.go
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/
client.go
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package ecr
import (
"context"
"encoding/base64"
"errors"
"fmt"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/aws/awserr"
"github.com/aws/aws-sdk-go-v2/aws/endpoints"
"github.com/aws/aws-sdk-go-v2/aws/external"
"github.com/aws/aws-sdk-go-v2/aws/stscreds"
"github.com/aws/aws-sdk-go-v2/service/ecr"
"github.com/hylandsoftware/trebuchet/internal/sts"
log "github.com/sirupsen/logrus"
)
var (
ErrNoTokenOrProxyEndpoint = errors.New("no authorization token or proxy endpoint obtained when requesting token")
ErrNoCredentials = errors.New("no credentials provided")
)
type Client interface {
RepositoryExists(repository string) (bool, error)
CreateRepository(repository string) error
GetRepositoryURI(repository string) (string, error)
GetAuthorizationToken() (*RegistryAuth, error)
}
type RegistryAuth struct {
ProxyEndpoint string
Username string
Password string
}
type ecrClient struct {
*ecr.Client
log *log.Entry
}
func NewClient(region string, assumeRole string, profile string) (Client, error) {
config, err := getClientConfig(region, assumeRole, profile, sts.NewRoleAssumer(), external.LoadDefaultAWSConfig)
if err != nil {
return nil, err
}
return &ecrClient{
Client: ecr.New(config),
log: log.WithField("component", "ecr"),
}, nil
}
type configLoaderFunc func(configs ...external.Config) (aws.Config, error)
func (c *ecrClient) RepositoryExists(repository string) (bool, error) {
_, err := c.DescribeRepositoriesRequest(&ecr.DescribeRepositoriesInput{
RepositoryNames: []string{repository},
}).Send(context.Background())
if err != nil {
if aerr, ok := err.(awserr.Error); ok && aerr.Code() == ecr.ErrCodeRepositoryNotFoundException {
c.log.WithField("repository", repository).Info("Repository does not exist")
return false, nil
}
return false, err
}
c.log.WithField("repository", repository).Info("Repository exists")
return true, nil
}
func (c *ecrClient) CreateRepository(repository string) error {
_, err := c.CreateRepositoryRequest(&ecr.CreateRepositoryInput{
RepositoryName: &repository,
}).Send(context.Background())
if err != nil {
c.log.WithField("repository", repository).Info("Error in creating repository")
return err
}
c.log.WithField("repository", repository).Info("Successfully created repository")
return nil
}
func (c *ecrClient) GetRepositoryURI(repository string) (string, error) {
result, err := c.DescribeRepositoriesRequest(&ecr.DescribeRepositoriesInput{
RepositoryNames: []string{repository},
}).Send(context.Background())
if err != nil {
return "", err
}
c.log.WithField("uri", *result.Repositories[0].RepositoryUri).Info("Repository URI")
return *result.Repositories[0].RepositoryUri, nil
}
func (c *ecrClient) GetAuthorizationToken() (*RegistryAuth, error) {
c.log.Debug("Getting authorization token")
result, err := c.GetAuthorizationTokenRequest(&ecr.GetAuthorizationTokenInput{}).Send(context.Background())
if err != nil {
return nil, err
}
authorizationData := result.AuthorizationData[0]
if authorizationData.ProxyEndpoint == nil && authorizationData.AuthorizationToken == nil {
return nil, ErrNoTokenOrProxyEndpoint
}
auth, err := extractToken(*authorizationData.AuthorizationToken, *authorizationData.ProxyEndpoint)
if err != nil {
return nil, err
}
return auth, nil
}
// SetupRepository will check if a repository exists, create it if it does not,
// and then return the repository URI to access to repository.
func SetupRepository(c Client, repository string) (string, error) {
repositoryExists, err := c.RepositoryExists(repository)
if err != nil {
return "", err
}
if !repositoryExists {
if err := c.CreateRepository(repository); err != nil {
return "", err
}
}
repositoryURI, err := c.GetRepositoryURI(repository)
if err != nil {
return "", err
}
return repositoryURI, nil
}
func extractToken(token string, proxyEndpoint string) (*RegistryAuth, error) {
decodedToken, err := base64.StdEncoding.DecodeString(token)
if err != nil {
return nil, err
}
parts := strings.SplitN(string(decodedToken), ":", 2)
if len(parts) < 2 {
return nil, fmt.Errorf("invalid token: expected two parts, got %d", len(parts))
}
return &RegistryAuth{
ProxyEndpoint: proxyEndpoint,
Username: parts[0],
Password: parts[1],
}, nil
}
func getClientConfig(region string, assumeRole string, profile string, assumer sts.RoleAssumer, configLoader configLoaderFunc) (cfg aws.Config, err error) {
if profile == "" {
cfg, err = configLoader()
if err != nil {
return aws.Config{}, err
}
} else {
log.WithField("profile", profile).Debug("Explicitly setting profile")
cfg, err = configLoader(external.WithSharedConfigProfile(profile))
if err != nil {
return aws.Config{}, err
}
}
if cfg.Credentials == nil {
return aws.Config{}, ErrNoCredentials
}
if region != "" {
log.WithField("region", region).Debug("Explicitly setting region")
cfg.Region = region
}
// If assumeRole is specified, assume that role - except for when a role has already been assumed.
if _, ok := cfg.Credentials.(*stscreds.AssumeRoleProvider); assumeRole != "" && !ok {
newCredentials, err := assumer.AssumeRole(cfg, assumeRole)
if err != nil {
return aws.Config{}, err
}
cfg.Credentials = newCredentials
}
// Ensure the set region is valid and exists for the ECR service
resolver := endpoints.NewDefaultResolver()
resolver.StrictMatching = true
if _, err = resolver.ResolveEndpoint("api.ecr", cfg.Region); err != nil {
return aws.Config{}, err
}
return cfg, nil
}