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cli.go
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cli.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package binding
import (
"context"
"fmt"
"github.com/openconfig/ondatra/binding"
"golang.org/x/crypto/ssh"
)
// cli implements the binding.ClientClient interface using an SSH client.
type cli struct {
*binding.AbstractCLIClient
ssh *ssh.Client
}
func newCLI(sc *ssh.Client) (*cli, error) {
return &cli{ssh: sc}, nil
}
func (c *cli) RunCommand(_ context.Context, cmd string) (binding.CommandResult, error) {
sess, err := c.ssh.NewSession()
if err != nil {
return nil, fmt.Errorf("could not create session: %w", err)
}
defer sess.Close()
out, err := sess.CombinedOutput(cmd)
switch err.(type) {
case nil:
return &cmdResult{output: string(out)}, nil
case *ssh.ExitError, *ssh.ExitMissingError:
return &cmdResult{output: string(out), error: err.Error()}, nil
default:
return nil, err
}
}
type cmdResult struct {
*binding.AbstractCommandResult
output, error string
}
func (r *cmdResult) Output() string {
return r.output
}
func (r *cmdResult) Error() string {
return r.error
}