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// Package connhelper provides helpers for connecting to a remote daemon host
// with custom logic.
package connhelper
import (
"context"
"net"
"net/url"
)
var helpers = map[string]func(*url.URL) (*ConnectionHelper, error){}
// ConnectionHelper allows to connect to a remote host with custom stream provider binary.
type ConnectionHelper struct {
// ContextDialer can be passed to grpc.WithContextDialer
ContextDialer func(ctx context.Context, addr string) (net.Conn, error)
}
// GetConnectionHelper returns BuildKit-specific connection helper for the given URL.
// GetConnectionHelper returns nil without error when no helper is registered for the scheme.
func GetConnectionHelper(daemonURL string) (*ConnectionHelper, error) {
u, err := url.Parse(daemonURL)
if err != nil {
return nil, err
}
fn, ok := helpers[u.Scheme]
if !ok {
return nil, nil
}
return fn(u)
}
// Register registers new connectionhelper for scheme
func Register(scheme string, fn func(*url.URL) (*ConnectionHelper, error)) {
helpers[scheme] = fn
}
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