96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
/*
|
|
Copyright 2021 The Kubernetes Authors 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.
|
|
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 cmd
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"os/exec"
|
|
"strings"
|
|
|
|
"github.com/go-logr/logr"
|
|
)
|
|
|
|
// Runner is an API to run commands and log them in a consistent way.
|
|
type Runner struct {
|
|
log logintf
|
|
}
|
|
|
|
// Just the logr methods we need in this package.
|
|
type logintf interface {
|
|
Info(msg string, keysAndValues ...interface{})
|
|
Error(err error, msg string, keysAndValues ...interface{})
|
|
V(level int) logr.Logger
|
|
}
|
|
|
|
// NewRunner returns a new CommandRunner
|
|
func NewRunner(log logintf) *Runner {
|
|
return &Runner{log: log}
|
|
}
|
|
|
|
// Run runs given command
|
|
func (r *Runner) Run(ctx context.Context, cwd string, env []string, command string, args ...string) (string, error) {
|
|
return r.RunWithStdin(ctx, cwd, env, "", command, args...)
|
|
}
|
|
|
|
// RunWithStdin runs given command with stardart input
|
|
func (r *Runner) RunWithStdin(ctx context.Context, cwd string, env []string, stdin, command string, args ...string) (string, error) {
|
|
cmdStr := cmdForLog(command, args...)
|
|
r.log.V(5).Info("running command", "cwd", cwd, "cmd", cmdStr)
|
|
|
|
cmd := exec.CommandContext(ctx, command, args...)
|
|
if cwd != "" {
|
|
cmd.Dir = cwd
|
|
}
|
|
if len(env) != 0 {
|
|
cmd.Env = env
|
|
}
|
|
outbuf := bytes.NewBuffer(nil)
|
|
errbuf := bytes.NewBuffer(nil)
|
|
cmd.Stdout = outbuf
|
|
cmd.Stderr = errbuf
|
|
cmd.Stdin = bytes.NewBufferString(stdin)
|
|
|
|
err := cmd.Run()
|
|
stdout := strings.TrimSpace(outbuf.String())
|
|
stderr := strings.TrimSpace(errbuf.String())
|
|
if ctx.Err() == context.DeadlineExceeded {
|
|
return "", fmt.Errorf("Run(%s): %w: { stdout: %q, stderr: %q }", cmdStr, ctx.Err(), stdout, stderr)
|
|
}
|
|
if err != nil {
|
|
return "", fmt.Errorf("Run(%s): %w: { stdout: %q, stderr: %q }", cmdStr, err, stdout, stderr)
|
|
}
|
|
r.log.V(6).Info("command result", "stdout", stdout, "stderr", stderr)
|
|
|
|
return stdout, nil
|
|
}
|
|
|
|
func cmdForLog(command string, args ...string) string {
|
|
if strings.ContainsAny(command, " \t\n") {
|
|
command = fmt.Sprintf("%q", command)
|
|
}
|
|
argsCopy := make([]string, len(args))
|
|
copy(argsCopy, args)
|
|
for i := range args {
|
|
if strings.ContainsAny(args[i], " \t\n") {
|
|
argsCopy[i] = fmt.Sprintf("%q", args[i])
|
|
}
|
|
}
|
|
return command + " " + strings.Join(argsCopy, " ")
|
|
}
|