/
exec_others.go
79 lines (64 loc) · 1.64 KB
/
exec_others.go
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//go:build !windows
package util
import (
"bytes"
"errors"
"fmt"
"os/exec"
"strings"
"syscall"
)
// Command defines commands to be executed and captures std out and std error
type Command struct {
Cmd *exec.Cmd
StdOut []byte
StdErr []byte
ExitCode int
}
func NewCommand(command string) *Command {
return &Command{
Cmd: exec.Command("bash", "-c", command),
}
}
// Exec run command and exit formatted error, callers can print err directly
// Any running error or non-zero exitcode is consider as error
func (cmd *Command) Exec() error {
var stdoutBuf, stderrBuf bytes.Buffer
cmd.Cmd.Stdout = &stdoutBuf
cmd.Cmd.Stderr = &stderrBuf
errString := fmt.Sprintf("failed to exec '%s'", cmd.GetCommand())
err := cmd.Cmd.Start()
if err != nil {
errString = fmt.Sprintf("%s, err: %v", errString, err)
return errors.New(errString)
}
err = cmd.Cmd.Wait()
if err != nil {
cmd.StdErr = stderrBuf.Bytes()
if exit, ok := err.(*exec.ExitError); ok {
cmd.ExitCode = exit.Sys().(syscall.WaitStatus).ExitStatus()
errString = fmt.Sprintf("%s, err: %s", errString, stderrBuf.Bytes())
} else {
cmd.ExitCode = 1
}
errString = fmt.Sprintf("%s, err: %v", errString, err)
return errors.New(errString)
}
cmd.StdOut, cmd.StdErr = stdoutBuf.Bytes(), stderrBuf.Bytes()
return nil
}
func (cmd Command) GetCommand() string {
return strings.Join(cmd.Cmd.Args, " ")
}
func (cmd Command) GetStdOut() string {
if len(cmd.StdOut) != 0 {
return strings.TrimSuffix(string(cmd.StdOut), "\n")
}
return ""
}
func (cmd Command) GetStdErr() string {
if len(cmd.StdErr) != 0 {
return strings.TrimSuffix(string(cmd.StdErr), "\n")
}
return ""
}