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https://github.com/containers/podman.git
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bd906cb314
First of some commands ignored cmd.Wait() error which means it was impossible to notice any command errors. And others only returned the wait error as it which when a command fails is just `exit status <code>` which is not helpful at all. This commit should add proper error wrapping with stderr to get useful strings back hopefully. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
131 lines
2.7 KiB
Go
131 lines
2.7 KiB
Go
//go:build windows
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package wutil
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"sync"
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"syscall"
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"github.com/containers/storage/pkg/fileutils"
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"golang.org/x/text/encoding/unicode"
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"golang.org/x/text/transform"
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)
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var (
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once sync.Once
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wslPath string
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)
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func FindWSL() string {
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// At the time of this writing, a defect appeared in the OS preinstalled WSL executable
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// where it no longer reliably locates the preferred Windows App Store variant.
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//
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// Manually discover (and cache) the wsl.exe location to bypass the problem
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once.Do(func() {
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var locs []string
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// Prefer Windows App Store version
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if localapp := getLocalAppData(); localapp != "" {
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locs = append(locs, filepath.Join(localapp, "Microsoft", "WindowsApps", "wsl.exe"))
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}
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// Otherwise, the common location for the legacy system version
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root := os.Getenv("SystemRoot")
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if root == "" {
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root = `C:\Windows`
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}
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locs = append(locs, filepath.Join(root, "System32", "wsl.exe"))
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for _, loc := range locs {
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if err := fileutils.Exists(loc); err == nil {
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wslPath = loc
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return
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}
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}
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// Hope for the best
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wslPath = "wsl"
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})
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return wslPath
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}
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func getLocalAppData() string {
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localapp := os.Getenv("LOCALAPPDATA")
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if localapp != "" {
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return localapp
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}
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if user := os.Getenv("USERPROFILE"); user != "" {
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return filepath.Join(user, "AppData", "Local")
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}
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return localapp
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}
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func SilentExec(command string, args ...string) error {
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cmd := exec.Command(command, args...)
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cmd.SysProcAttr = &syscall.SysProcAttr{CreationFlags: 0x08000000}
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cmd.Stdout = nil
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cmd.Stderr = nil
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("command %s %v failed: %w", command, args, err)
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}
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return nil
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}
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func SilentExecCmd(command string, args ...string) *exec.Cmd {
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cmd := exec.Command(command, args...)
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cmd.SysProcAttr = &syscall.SysProcAttr{CreationFlags: 0x08000000}
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return cmd
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}
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func IsWSLInstalled() bool {
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cmd := SilentExecCmd(FindWSL(), "--status")
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out, err := cmd.StdoutPipe()
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cmd.Stderr = nil
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if err != nil {
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return false
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}
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if err = cmd.Start(); err != nil {
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return false
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}
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kernelNotFound := matchOutputLine(out, "kernel file is not found")
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if err := cmd.Wait(); err != nil {
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return false
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}
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return !kernelNotFound
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}
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func IsWSLStoreVersionInstalled() bool {
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cmd := SilentExecCmd(FindWSL(), "--version")
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cmd.Stdout = nil
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cmd.Stderr = nil
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if err := cmd.Run(); err != nil {
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return false
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}
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return true
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}
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func matchOutputLine(output io.ReadCloser, match string) bool {
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scanner := bufio.NewScanner(transform.NewReader(output, unicode.UTF16(unicode.LittleEndian, unicode.UseBOM).NewDecoder()))
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for scanner.Scan() {
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line := scanner.Text()
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if strings.Contains(line, match) {
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return true
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}
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}
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return false
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}
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