message: Disable long_file_names test if not supported on Windows.
diff: @@ -1857,6 +1857,32 @@ fn long_file_names() {
  "012345678901234567890123456789012345678901234567890123456789",
  "012345678901234567890123456789012345678901234567890123456789"
  );
  + if cfg!(windows) {
  + // Long paths on Windows require a special registry entry that is
  + // disabled by default (even on Windows 10).
  + // https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file
  + // If the directory where Cargo runs happens to be more than 80 characters
  + // long, then it will bump into this limit.
  + //
  + // First create a directory to account for various paths Cargo will
  + // be using in the target directory (such as "target/package/foo-0.1.0").
  + let test_path = paths::root().join("test-dir-probe-long-path-support");
  + test_path.mkdir_p();
  + let test_path = test_path.join(long_name);
  + if let Err(e) = File::create(&test_path) {
  + use std::io::Write;
  + writeln!(
  + std::io::stderr(),
  + "\nSkipping long_file_names test, this OS or filesystem does not \
  + appear to support long file paths: {:?}\n{:?}",
  + e,
  + test_path
  + )
  + .unwrap();
  + return;
  + }
  + }
  +
  let p = project()
  .file(
  "Cargo.toml",
  