message: Debug why autoinstalling zig isn't working on Windows
diff: @@ -1632,7 +1632,13 @@ fn find_zig_binary(path: Option<PathBuf>) -> Result<PathBuf> {
  .or_else(|| {
  #[cfg(feature = "http")]
  {
  - try_autoinstall_zig().map(|p| p.join("zig"))
  + match try_autoinstall_zig() {
  + Ok(p) => Some(p.join("zig")),
  + Err(e) => {
  + eprintln!("Error when installing zig: {e}");
  + None
  + }
  + }
  }
  #[cfg(not(feature = "http"))]
  {
  @@ -1670,8 +1676,9 @@ fn find_zig_binary(path: Option<PathBuf>) -> Result<PathBuf> {
  /// Tries to auto-install zig into ~/.wasmer/utils/zig/{version}
  #[cfg(feature = "http")]
  -fn try_autoinstall_zig() -> Option<PathBuf> {
  - let zig_dir = wasmer_registry::get_wasmer_root_dir()?
  +fn try_autoinstall_zig() -> Result<PathBuf, String> {
  + let zig_dir = wasmer_registry::get_wasmer_root_dir()
  + .ok_or_else(|| "no wasmer root dir".to_string())?
  .join("utils")
  .join("zig");
  let mut existing_version = None;
  @@ -1684,7 +1691,7 @@ fn try_autoinstall_zig() -> Option<PathBuf> {
  existing_version = rd.next().and_then(|entry| {
  let string = entry.ok()?.file_name().to_str()?.to_string();
  if zig_dir.join(&string).join("zig").exists() {
  - Some(string)
  + Ok(string)
  } else {
  None
  }
  @@ -1692,14 +1699,14 @@ fn try_autoinstall_zig() -> Option<PathBuf> {
  }
  if let Some(exist) = existing_version {
  - return Some(zig_dir.join(exist));
  + return Ok(zig_dir.join(exist));
  }
  install_zig(&zig_dir)
  }
  #[cfg(feature = "http")]
  -fn install_zig(target_targz_path: &Path) -> Option<PathBuf> {
  +fn install_zig(target_targz_path: &Path) -> Result<PathBuf, String> {
  let resp = reqwest::blocking::get("https://ziglang.org/download/index.json");
  let resp = resp.ok()?;
  let resp = resp.json::<ZiglangOrgJson>();
  