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transport.go
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transport.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package oci
import (
"context"
"net"
"net/http"
"github.com/google/go-containerregistry/pkg/v1/remote"
"namespacelabs.dev/foundation/internal/build/registry"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/ssh"
"namespacelabs.dev/foundation/internal/tcache"
)
var (
sshHttpTransports = tcache.NewCache[*http.Transport]()
)
func parseTransport(ctx context.Context, t *registry.RegistryTransport) ([]remote.Option, error) {
if t == nil {
return nil, nil
}
switch {
case t.Ssh != nil:
remoteAddr := t.Ssh.RemoteAddr
if remoteAddr == "" {
return nil, fnerrors.New("transport.ssh: missing remote address")
}
deferred, err := ssh.Establish(ctx, ssh.Endpoint{
User: t.Ssh.User,
PrivateKeyPath: t.Ssh.PrivateKeyPath,
Address: t.Ssh.SshAddr,
})
if err != nil {
return nil, err
}
transport, err := sshHttpTransports.Compute(deferred.CacheKey, func() (*http.Transport, error) {
conn, err := deferred.Dial()
if err != nil {
return nil, err
}
// XXX conn.Close
return &http.Transport{
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
return conn.Dial("tcp", remoteAddr)
},
}, nil
})
if err != nil {
return nil, err
}
return []remote.Option{remote.WithTransport(transport)}, nil
}
return nil, nil
}