skeema shellout for compiling in windows

shellout_windows.go

// This file contains shellout functionality that is specific to Windows.

//go:build windows
// +build windows

package shellout

import (
	"context"
	"fmt"
	"os/exec"
	"regexp"
	"strings"
)

func (c *Command) cmd() (*exec.Cmd, error) {
	if c.timeout > 0 {
		ctx, cancel := context.WithTimeout(context.Background(), c.timeout)
		c.cancelFunc = cancel
		// Use 'cmd.exe' for Windows command shell
		return exec.CommandContext(ctx, "cmd.exe", "/C", c.command), nil
	}
	// If no timeout, use 'cmd.exe' without context
	return exec.Command("cmd.exe", "/C", c.command), nil
}

// noQuotesNeeded is a regexp for detecting which variable values do not require
// escaping and quote-wrapping in escapeVarValue()
var noQuotesNeeded = regexp.MustCompile(`^[\w/@%=:.,+-]*$`)

// escapeVarValue takes a string and wraps it in double-quotes so that it will
// be interpreted as a single argument in a command line. On Windows, escaping 
// is handled slightly differently.
func escapeVarValue(value string) string {
	if noQuotesNeeded.MatchString(value) {
		return value
	}
	// Escape by wrapping in double quotes, since single quotes do not behave the same in cmd.exe
	return fmt.Sprintf(`"%s"`, strings.ReplaceAll(value, `"`, `\"`))
}