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//go:build windows
package util
import (
"fmt"
"os"
"os/exec"
"strings"
"sync/atomic"
"syscall"
)
var shellPath atomic.Value
// ExecCommand executes the given command with $SHELL
func ExecCommand(command string, setpgid bool) *exec.Cmd {
var shell string
if cached := shellPath.Load(); cached != nil {
shell = cached.(string)
} else {
shell = os.Getenv("SHELL")
if len(shell) == 0 {
shell = "cmd"
} else if strings.Contains(shell, "/") {
out, err := exec.Command("cygpath", "-w", shell).Output()
if err == nil {
shell = strings.Trim(string(out), "\n")
}
}
shellPath.Store(shell)
}
return ExecCommandWith(shell, command, setpgid)
}
// ExecCommandWith executes the given command with the specified shell
// FIXME: setpgid is unused. We set it in the Unix implementation so that we
// can kill preview process with its child processes at once.
// NOTE: For "powershell", we should ideally set output encoding to UTF8,
// but it is left as is now because no adverse effect has been observed.
func ExecCommandWith(shell string, command string, setpgid bool) *exec.Cmd {
var cmd *exec.Cmd
if strings.Contains(shell, "cmd") {
cmd = exec.Command(shell)
cmd.SysProcAttr = &syscall.SysProcAttr{
HideWindow: false,
CmdLine: fmt.Sprintf(` /v:on/s/c "%s"`, command),
CreationFlags: 0,
}
return cmd
}
if strings.Contains(shell, "pwsh") || strings.Contains(shell, "powershell") {
cmd = exec.Command(shell, "-NoProfile", "-Command", command)
} else {
cmd = exec.Command(shell, "-c", command)
}
cmd.SysProcAttr = &syscall.SysProcAttr{
HideWindow: false,
CreationFlags: 0,
}
return cmd
}
// KillCommand kills the process for the given command
func KillCommand(cmd *exec.Cmd) error {
return cmd.Process.Kill()
}
// IsWindows returns true on Windows
func IsWindows() bool {
return true
}
// SetNonblock executes syscall.SetNonblock on file descriptor
func SetNonblock(file *os.File, nonblock bool) {
syscall.SetNonblock(syscall.Handle(file.Fd()), nonblock)
}
// Read executes syscall.Read on file descriptor
func Read(fd int, b []byte) (int, error) {
return syscall.Read(syscall.Handle(fd), b)
}
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