/
docker_creds.go
86 lines (70 loc) · 1.61 KB
/
docker_creds.go
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package dockercreds
import (
"encoding/json"
"net/url"
"os"
"path/filepath"
"strings"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/pkg/errors"
)
type DockerCreds map[string]authn.AuthConfig
func (c DockerCreds) Resolve(reg authn.Resource) (authn.Authenticator, error) {
for registry, entry := range c {
matcher := RegistryMatcher{Registry: registry}
if matcher.Match(reg.RegistryStr()) {
return authn.FromConfig(entry), nil
}
}
// Fallback on anonymous.
return authn.Anonymous, nil
}
func (c DockerCreds) Save(path string) error {
err := os.MkdirAll(filepath.Dir(path), 0777)
if err != nil {
return errors.Wrapf(err, "error creating %s", filepath.Dir(path))
}
configJson := dockerConfigJson{
Auths: c,
}
fh, err := os.Create(path)
if err != nil {
return err
}
defer fh.Close()
return json.NewEncoder(fh).Encode(configJson)
}
func (c DockerCreds) Append(a DockerCreds) (DockerCreds, error) {
if c == nil {
return a, nil
} else if a == nil {
return c, nil
}
for k, v := range a {
if contains, err := c.contains(k); err != nil {
return nil, err
} else if !contains {
c[k] = v
}
}
return c, nil
}
func (c DockerCreds) contains(reg string) (bool, error) {
if !strings.HasPrefix(reg, "http://") && !strings.HasPrefix(reg, "https://") {
reg = "//" + reg
}
u, err := url.Parse(reg)
if err != nil {
return false, err
}
for existingRegistry := range c {
matcher := RegistryMatcher{Registry: existingRegistry}
if matcher.Match(u.Host) {
return true, nil
}
}
return false, nil
}
type dockerConfigJson struct {
Auths DockerCreds `json:"auths"`
}