Unable to pass the example with private key

[meetme2meat]

Following is my example file

package main

import (
	"context"
	"fmt"

	git "github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/transport"

	// "github.com/go-git/go-git/v5/plumbing/transport/client"
	"github.com/go-git/go-git/v5/plumbing/transport/ssh"
)

func main() {

	// cfg := cssh.ClientConfig{HostKeyCallback: cssh.InsecureIgnoreHostKey()}
	// c := ssh.NewClient(&cfg)
	// client.InstallProtocol("ssh", c)
	fmt.Println(cloneRepo(context.Background()))
}

func cloneRepo(ctx context.Context) error {
	url := "github.com:ringsq/access-policies.git"
	auth, err := auth("./keys/id_rsa", "")
	if err != nil {
		return fmt.Errorf("failed to create git auth credentials: %w", err)
	}

	fmt.Println(auth.String())
	opts := &git.CloneOptions{
		URL:           url,
		Auth:          auth,
		ReferenceName: plumbing.NewBranchReferenceName("master"),
		SingleBranch:  true,
	}

	fmt.Printf("Cloning git repo from %s", "")

	if _, err := git.PlainCloneContext(ctx, "./", false, opts); err != nil {
		return fmt.Errorf("failed to clone from %s to %s: %w", url, "master", err)
	}

	return nil
}

func auth(privateKey string, password string) (transport.AuthMethod, error) {
	return ssh.NewPublicKeysFromFile("git", privateKey, password)
}

Every time I run this I get the following error

failed to clone from github.com:ringsq/access-policies.git to master: ssh: handshake failed: known hosts: the key is unknown

But I'm able to git-clone using the git utility. once the git utility (or using ssh -T git@github.com) writes the known_hosts entry the script above seems to work. Well, it seems workable solution on a local machine but doing this on production.

[meetme2meat]

I'm able to pass it by setting the HostKeyCallbackHelper for *PublicKeys

func auth(privateKey string, password string) (transport.AuthMethod, error) {
       	pub, err := ssh.NewPublicKeysFromFile("git", privateKey, password)
	if err == nil {
		pub.HostKeyCallbackHelper = ssh.HostKeyCallbackHelper{
			HostKeyCallback: cssh.InsecureIgnoreHostKey(),
		}
	}
        return pub, error

[charithe]

I believe the root cause for this issue is #411.

[go101]

It looks the PublicKeys.HostKeyCallbackHelper field is removed since v5.5.0, which broke modules compatibility.
On the other hand, it looks this field is not needed any more since v5.5.0, which makes user code become cleaner.