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package main
import (
"strings"
"github.com/docker/docker/pkg/idtools"
"github.com/moby/buildkit/util/bklog"
"github.com/pkg/errors"
)
func parseIdentityMapping(str string) (*idtools.IdentityMapping, error) {
if str == "" {
return nil, nil
}
idparts := strings.SplitN(str, ":", 3)
if len(idparts) > 2 {
return nil, errors.Errorf("invalid userns remap specification in %q", str)
}
username := idparts[0]
bklog.L.Debugf("user namespaces: ID ranges will be mapped to subuid ranges of: %s", username)
mappings, err := idtools.LoadIdentityMapping(username)
if err != nil {
return nil, errors.Wrap(err, "failed to create ID mappings")
}
return &mappings, nil
}
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