chore: checkpoint before Python removal

vendor/tempfile/tests/env.rs

@@ -0,0 +1,16 @@
+#![deny(rust_2018_idioms)]
+
+use std::path::Path;
+
+#[test]
+fn test_override_temp_dir() {
+    #[cfg(not(target_os = "wasi"))]
+    assert_eq!(tempfile::env::temp_dir(), std::env::temp_dir());
+
+    let new_tmp = Path::new("/tmp/override");
+    tempfile::env::override_temp_dir(new_tmp).unwrap();
+    assert_eq!(tempfile::env::temp_dir(), new_tmp);
+
+    let new_tmp2 = Path::new("/tmp/override2");
+    tempfile::env::override_temp_dir(new_tmp2).expect_err("override should only be possible once");
+}

vendor/tempfile/tests/namedtempfile.rs

@@ -0,0 +1,694 @@
+#![deny(rust_2018_idioms)]
+
+use std::ffi::{OsStr, OsString};
+use std::fs::File;
+use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::path::{Path, PathBuf};
+use tempfile::{env, tempdir, Builder, NamedTempFile, TempPath};
+
+struct CWDGuard {
+    #[allow(unused)]
+    guard: std::sync::MutexGuard<'static, ()>,
+    old_cwd: PathBuf,
+}
+
+impl Drop for CWDGuard {
+    fn drop(&mut self) {
+        let _ = std::env::set_current_dir(&self.old_cwd);
+    }
+}
+
+static CWD_LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(());
+
+fn cwd_lock() -> CWDGuard {
+    let guard = CWD_LOCK.lock().unwrap();
+    let old_cwd = std::env::current_dir().unwrap();
+    CWDGuard { guard, old_cwd }
+}
+
+fn exists<P: AsRef<Path>>(path: P) -> bool {
+    std::fs::metadata(path.as_ref()).is_ok()
+}
+
+/// For the wasi platforms, `std::env::temp_dir` will panic. For those targets, configure the /tmp
+/// directory instead as the base directory for temp files.
+fn configure_wasi_temp_dir() {
+    if cfg!(target_os = "wasi") {
+        let _ = tempfile::env::override_temp_dir(Path::new("/tmp"));
+    }
+}
+
+#[test]
+fn test_prefix() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = NamedTempFile::with_prefix("prefix").unwrap();
+    let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
+    assert!(name.starts_with("prefix"));
+}
+
+#[test]
+fn test_suffix() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = NamedTempFile::with_suffix("suffix").unwrap();
+    let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
+    assert!(name.ends_with("suffix"));
+}
+
+#[test]
+fn test_basic() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    write!(tmpfile, "abcde").unwrap();
+    tmpfile.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    tmpfile.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+}
+
+#[test]
+fn test_deleted() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = NamedTempFile::new().unwrap();
+    let path = tmpfile.path().to_path_buf();
+    assert!(exists(&path));
+    drop(tmpfile);
+    assert!(!exists(&path));
+}
+
+#[test]
+fn test_persist() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    let old_path = tmpfile.path().to_path_buf();
+    let persist_path = env::temp_dir().join("persisted_temporary_file");
+    write!(tmpfile, "abcde").unwrap();
+    {
+        assert!(exists(&old_path));
+        let mut f = tmpfile.persist(&persist_path).unwrap();
+        assert!(!exists(&old_path));
+
+        // Check original file
+        f.seek(SeekFrom::Start(0)).unwrap();
+        let mut buf = String::new();
+        f.read_to_string(&mut buf).unwrap();
+        assert_eq!("abcde", buf);
+    }
+
+    {
+        // Try opening it at the new path.
+        let mut f = File::open(&persist_path).unwrap();
+        f.seek(SeekFrom::Start(0)).unwrap();
+        let mut buf = String::new();
+        f.read_to_string(&mut buf).unwrap();
+        assert_eq!("abcde", buf);
+    }
+    std::fs::remove_file(&persist_path).unwrap();
+}
+
+#[test]
+fn test_persist_noclobber() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    let old_path = tmpfile.path().to_path_buf();
+    let persist_target = NamedTempFile::new().unwrap();
+    let persist_path = persist_target.path().to_path_buf();
+    write!(tmpfile, "abcde").unwrap();
+    assert!(exists(&old_path));
+    {
+        tmpfile = tmpfile.persist_noclobber(&persist_path).unwrap_err().into();
+        assert!(exists(&old_path));
+        std::fs::remove_file(&persist_path).unwrap();
+        drop(persist_target);
+    }
+    tmpfile.persist_noclobber(&persist_path).unwrap();
+    // Try opening it at the new path.
+    let mut f = File::open(&persist_path).unwrap();
+    f.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    f.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+    std::fs::remove_file(&persist_path).unwrap();
+}
+
+#[test]
+fn test_customnamed() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = Builder::new()
+        .prefix("tmp")
+        .suffix(&".rs")
+        .rand_bytes(12)
+        .tempfile()
+        .unwrap();
+    let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
+    assert!(name.starts_with("tmp"));
+    assert!(name.ends_with(".rs"));
+    assert_eq!(name.len(), 18);
+}
+
+#[test]
+fn test_append() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = Builder::new().append(true).tempfile().unwrap();
+    tmpfile.write_all(b"a").unwrap();
+    tmpfile.seek(SeekFrom::Start(0)).unwrap();
+    tmpfile.write_all(b"b").unwrap();
+
+    tmpfile.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = vec![0u8; 1];
+    tmpfile.read_exact(&mut buf).unwrap();
+    assert_eq!(buf, b"a");
+}
+
+#[test]
+fn test_reopen() {
+    configure_wasi_temp_dir();
+
+    let source = NamedTempFile::new().unwrap();
+    let mut first = source.reopen().unwrap();
+    let mut second = source.reopen().unwrap();
+    drop(source);
+
+    write!(first, "abcde").expect("write failed");
+    let mut buf = String::new();
+    second.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+}
+
+#[test]
+fn test_into_file() {
+    configure_wasi_temp_dir();
+
+    let mut file = NamedTempFile::new().unwrap();
+    let path = file.path().to_owned();
+    write!(file, "abcde").expect("write failed");
+
+    assert!(path.exists());
+    let mut file = file.into_file();
+    assert!(!path.exists());
+
+    file.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    file.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+}
+
+#[test]
+fn test_immut() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = NamedTempFile::new().unwrap();
+    (&tmpfile).write_all(b"abcde").unwrap();
+    (&tmpfile).seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    (&tmpfile).read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+}
+
+#[test]
+fn test_temppath() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    write!(tmpfile, "abcde").unwrap();
+
+    let path = tmpfile.into_temp_path();
+    assert!(path.is_file());
+}
+
+#[test]
+fn test_temppath_persist() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    write!(tmpfile, "abcde").unwrap();
+
+    let tmppath = tmpfile.into_temp_path();
+
+    let old_path = tmppath.to_path_buf();
+    let persist_path = env::temp_dir().join("persisted_temppath_file");
+
+    {
+        assert!(exists(&old_path));
+        tmppath.persist(&persist_path).unwrap();
+        assert!(!exists(&old_path));
+    }
+
+    {
+        // Try opening it at the new path.
+        let mut f = File::open(&persist_path).unwrap();
+        f.seek(SeekFrom::Start(0)).unwrap();
+        let mut buf = String::new();
+        f.read_to_string(&mut buf).unwrap();
+        assert_eq!("abcde", buf);
+    }
+
+    std::fs::remove_file(&persist_path).unwrap();
+}
+
+#[test]
+fn test_temppath_persist_noclobber() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    write!(tmpfile, "abcde").unwrap();
+
+    let mut tmppath = tmpfile.into_temp_path();
+
+    let old_path = tmppath.to_path_buf();
+    let persist_target = NamedTempFile::new().unwrap();
+    let persist_path = persist_target.path().to_path_buf();
+
+    assert!(exists(&old_path));
+
+    {
+        tmppath = tmppath.persist_noclobber(&persist_path).unwrap_err().into();
+        assert!(exists(&old_path));
+        std::fs::remove_file(&persist_path).unwrap();
+        drop(persist_target);
+    }
+
+    tmppath.persist_noclobber(&persist_path).unwrap();
+
+    // Try opening it at the new path.
+    let mut f = File::open(&persist_path).unwrap();
+    f.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    f.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+    std::fs::remove_file(&persist_path).unwrap();
+}
+
+#[test]
+fn temp_path_from_existing() {
+    configure_wasi_temp_dir();
+
+    let tmp_dir = tempdir().unwrap();
+    let tmp_file_path_1 = tmp_dir.path().join("testfile1");
+    let tmp_file_path_2 = tmp_dir.path().join("testfile2");
+
+    File::create(&tmp_file_path_1).unwrap();
+    assert!(tmp_file_path_1.exists(), "Test file 1 hasn't been created");
+
+    File::create(&tmp_file_path_2).unwrap();
+    assert!(tmp_file_path_2.exists(), "Test file 2 hasn't been created");
+
+    let tmp_path = TempPath::try_from_path(&tmp_file_path_1).unwrap();
+    assert!(
+        tmp_file_path_1.exists(),
+        "Test file has been deleted before dropping TempPath"
+    );
+
+    drop(tmp_path);
+    assert!(
+        !tmp_file_path_1.exists(),
+        "Test file exists after dropping TempPath"
+    );
+    assert!(
+        tmp_file_path_2.exists(),
+        "Test file 2 has been deleted before dropping TempDir"
+    );
+}
+
+#[test]
+#[allow(unreachable_code)]
+fn temp_path_from_argument_types() {
+    // This just has to compile
+    return;
+
+    TempPath::try_from_path("").unwrap();
+    TempPath::try_from_path(String::new()).unwrap();
+    TempPath::try_from_path(OsStr::new("")).unwrap();
+    TempPath::try_from_path(OsString::new()).unwrap();
+    TempPath::try_from_path(Path::new("")).unwrap();
+    TempPath::try_from_path(PathBuf::new()).unwrap();
+    TempPath::try_from_path(PathBuf::new().into_boxed_path()).unwrap();
+}
+
+// This test only works on platforms where we can safely delete the current
+// working directory.
+#[test]
+#[cfg(not(any(target_os = "redox", target_os = "wasi", windows)))]
+fn test_temp_path_resolve_missing_cwd() {
+    configure_wasi_temp_dir();
+    let _guard = cwd_lock();
+
+    // Intentionally delete the current working directory
+    let tmpdir = tempdir().unwrap();
+    std::env::set_current_dir(&tmpdir).expect("failed to change to the temporary directory");
+    tmpdir.close().unwrap();
+
+    #[allow(deprecated)]
+    let path = TempPath::from_path("foo");
+    assert_eq!(&*path, Path::new("foo"));
+
+    TempPath::try_from_path("foo").expect_err("should have failed to make path absolute file");
+}
+
+#[test]
+fn test_temp_path_resolve_existing_cwd() {
+    configure_wasi_temp_dir();
+    let _guard = cwd_lock();
+
+    let tmpdir = tempdir().unwrap();
+    std::env::set_current_dir(&tmpdir).expect("failed to change to directory");
+
+    let cwd = if cfg!(target_os = "macos") {
+        // MacOS has absolute paths and ABSOLUTE paths. `cd /var/tmp/...` actually changes to
+        // /private/var/tmp...
+        std::env::current_dir().expect("failed to get the current directory")
+    } else {
+        tmpdir.path().to_owned()
+    };
+
+    #[allow(deprecated)]
+    let path = TempPath::from_path("foo");
+    assert_eq!(&*path, cwd.join("foo"));
+
+    #[allow(deprecated)]
+    let path = TempPath::from_path("");
+    assert_eq!(&*path, Path::new(""));
+
+    TempPath::try_from_path("").expect_err("empty paths should fail");
+}
+
+#[test]
+fn test_write_after_close() {
+    configure_wasi_temp_dir();
+
+    let path = NamedTempFile::new().unwrap().into_temp_path();
+    File::create(path).unwrap().write_all(b"test").unwrap();
+}
+
+#[test]
+fn test_change_dir() {
+    configure_wasi_temp_dir();
+    let _guard = cwd_lock();
+
+    let dir_a = tempdir().unwrap();
+    let dir_b = tempdir().unwrap();
+
+    std::env::set_current_dir(&dir_a).expect("failed to change to directory A");
+    let tmpfile = NamedTempFile::new_in(".").unwrap();
+    let path = std::env::current_dir().unwrap().join(tmpfile.path());
+    std::env::set_current_dir(&dir_b).expect("failed to change to directory B");
+    drop(tmpfile);
+    assert!(!exists(path));
+
+    drop(dir_a);
+    drop(dir_b);
+}
+
+#[test]
+fn test_change_dir_make() {
+    configure_wasi_temp_dir();
+    let _guard = cwd_lock();
+
+    let dir_a = tempdir().unwrap();
+    let dir_b = tempdir().unwrap();
+
+    std::env::set_current_dir(&dir_a).expect("failed to change to directory A");
+    let tmpfile = Builder::new().make_in(".", |p| File::create(p)).unwrap();
+    let path = std::env::current_dir().unwrap().join(tmpfile.path());
+    std::env::set_current_dir(&dir_b).expect("failed to change to directory B");
+    drop(tmpfile);
+    assert!(!exists(path));
+
+    drop(dir_a);
+    drop(dir_b);
+}
+
+#[test]
+fn test_into_parts() {
+    configure_wasi_temp_dir();
+
+    let mut file = NamedTempFile::new().unwrap();
+    write!(file, "abcd").expect("write failed");
+
+    let (mut file, temp_path) = file.into_parts();
+
+    let path = temp_path.to_path_buf();
+
+    assert!(path.exists());
+    drop(temp_path);
+    assert!(!path.exists());
+
+    write!(file, "efgh").expect("write failed");
+
+    file.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    file.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcdefgh", buf);
+}
+
+#[test]
+fn test_from_parts() {
+    configure_wasi_temp_dir();
+
+    let mut file = NamedTempFile::new().unwrap();
+    write!(file, "abcd").expect("write failed");
+
+    let (file, temp_path) = file.into_parts();
+
+    let file = NamedTempFile::from_parts(file, temp_path);
+
+    assert!(file.path().exists());
+}
+
+#[test]
+fn test_keep() {
+    configure_wasi_temp_dir();
+
+    let mut tmpfile = NamedTempFile::new().unwrap();
+    write!(tmpfile, "abcde").unwrap();
+    let (mut f, temp_path) = tmpfile.into_parts();
+    let path;
+    {
+        assert!(exists(&temp_path));
+        path = temp_path.keep().unwrap();
+        assert!(exists(&path));
+
+        // Check original file
+        f.seek(SeekFrom::Start(0)).unwrap();
+        let mut buf = String::new();
+        f.read_to_string(&mut buf).unwrap();
+        assert_eq!("abcde", buf);
+    }
+
+    {
+        // Try opening it again.
+        let mut f = File::open(&path).unwrap();
+        f.seek(SeekFrom::Start(0)).unwrap();
+        let mut buf = String::new();
+        f.read_to_string(&mut buf).unwrap();
+        assert_eq!("abcde", buf);
+    }
+    std::fs::remove_file(&path).unwrap();
+}
+
+#[test]
+fn test_disable_cleanup() {
+    configure_wasi_temp_dir();
+
+    // Case 0: never mark as "disable cleanup"
+    // Case 1: enable "disable cleanup" in the builder, don't touch it after.
+    // Case 2: enable "disable cleanup" in the builder, turn it off after.
+    // Case 3: don't enable disable cleanup in the builder, turn it on after.
+
+    for case in 0..4 {
+        let in_builder = case & 1 > 0;
+        let toggle = case & 2 > 0;
+        let mut tmpfile = Builder::new()
+            .disable_cleanup(in_builder)
+            .tempfile()
+            .unwrap();
+        write!(tmpfile, "abcde").unwrap();
+        if toggle {
+            tmpfile.disable_cleanup(!in_builder);
+        }
+
+        let path = tmpfile.path().to_owned();
+        drop(tmpfile);
+
+        if in_builder ^ toggle {
+            // Try opening it again.
+            let mut f = File::open(&path).unwrap();
+            let mut buf = String::new();
+            f.read_to_string(&mut buf).unwrap();
+            assert_eq!("abcde", buf);
+            std::fs::remove_file(&path).unwrap();
+        } else {
+            assert!(!path.exists(), "tempfile wasn't deleted");
+        }
+    }
+}
+
+#[test]
+fn test_make() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = Builder::new().make(|path| File::create(path)).unwrap();
+
+    assert!(tmpfile.path().is_file());
+}
+
+#[test]
+fn test_make_in() {
+    configure_wasi_temp_dir();
+
+    let tmp_dir = tempdir().unwrap();
+
+    let tmpfile = Builder::new()
+        .make_in(tmp_dir.path(), |path| File::create(path))
+        .unwrap();
+
+    assert!(tmpfile.path().is_file());
+    assert_eq!(tmpfile.path().parent(), Some(tmp_dir.path()));
+}
+
+#[test]
+fn test_make_fnmut() {
+    configure_wasi_temp_dir();
+
+    let mut count = 0;
+
+    // Show that an FnMut can be used.
+    let tmpfile = Builder::new()
+        .make(|path| {
+            count += 1;
+            File::create(path)
+        })
+        .unwrap();
+
+    assert!(tmpfile.path().is_file());
+}
+
+#[cfg(unix)]
+#[test]
+fn test_make_uds() {
+    use std::os::unix::net::UnixListener;
+
+    let temp_sock = Builder::new()
+        .prefix("tmp")
+        .suffix(".sock")
+        .rand_bytes(12)
+        .make(|path| UnixListener::bind(path))
+        .unwrap();
+
+    assert!(temp_sock.path().exists());
+}
+
+// This works(ish) on redox, but it's really slow.
+#[cfg(all(unix, not(target_os = "redox")))]
+#[test]
+fn test_make_uds_conflict() {
+    use std::io::ErrorKind;
+    use std::os::unix::net::UnixListener;
+
+    let sockets = std::iter::repeat_with(|| {
+        Builder::new()
+            .prefix("tmp")
+            .suffix(".sock")
+            .rand_bytes(1)
+            .make(|path| UnixListener::bind(path))
+    })
+    .take_while(|r| match r {
+        Ok(_) => true,
+        Err(e) if matches!(e.kind(), ErrorKind::AddrInUse | ErrorKind::AlreadyExists) => false,
+        Err(e) => panic!("unexpected error {e}"),
+    })
+    .collect::<Result<Vec<_>, _>>()
+    .unwrap();
+
+    // Number of sockets we can create. Depends on whether or not the filesystem is case sensitive.
+
+    #[cfg(target_os = "macos")]
+    const NUM_FILES: usize = 36;
+    #[cfg(not(target_os = "macos"))]
+    const NUM_FILES: usize = 62;
+
+    assert_eq!(sockets.len(), NUM_FILES);
+
+    for socket in sockets {
+        assert!(socket.path().exists());
+    }
+}
+
+/// Make sure we re-seed with system randomness if we run into a conflict.
+#[test]
+fn test_reseed() {
+    configure_wasi_temp_dir();
+
+    // Deterministic seed.
+    fastrand::seed(42);
+
+    // I need to create 5 conflicts but I can't just make 5 temporary files because we fork the RNG
+    // each time we create a file.
+    let mut attempts = 0;
+    let mut files: Vec<_> = Vec::new();
+    let _ = Builder::new().make(|path| -> io::Result<File> {
+        if attempts == 5 {
+            return Err(io::Error::new(io::ErrorKind::Other, "stop!"));
+        }
+        attempts += 1;
+        let f = File::options()
+            .write(true)
+            .create_new(true)
+            .open(path)
+            .unwrap();
+
+        files.push(NamedTempFile::from_parts(
+            f,
+            TempPath::try_from_path(path).unwrap(),
+        ));
+        Err(io::Error::new(io::ErrorKind::AlreadyExists, "fake!"))
+    });
+
+    assert_eq!(5, attempts);
+    attempts = 0;
+
+    // Re-seed to cause a conflict.
+    fastrand::seed(42);
+
+    let _f = Builder::new()
+        .make(|path| {
+            attempts += 1;
+            File::options().write(true).create_new(true).open(path)
+        })
+        .unwrap();
+
+    // We expect exactly three conflict before we re-seed with system randomness.
+    assert_eq!(4, attempts);
+}
+
+// Issue #224.
+#[test]
+fn test_overly_generic_bounds() {
+    pub struct Foo<T>(T);
+
+    impl<T> Foo<T>
+    where
+        T: Sync + Send + 'static,
+        for<'a> &'a T: Write + Read,
+    {
+        pub fn new(foo: T) -> Self {
+            Self(foo)
+        }
+    }
+
+    // Don't really need to run this. Only care if it compiles.
+    if let Ok(file) = File::open("i_do_not_exist") {
+        let mut f;
+        let _x = {
+            f = Foo::new(file);
+            &mut f
+        };
+    }
+}

vendor/tempfile/tests/spooled.rs

@@ -0,0 +1,377 @@
+#![deny(rust_2018_idioms)]
+
+use std::io::{Read, Seek, SeekFrom, Write};
+
+use tempfile::{env, spooled_tempfile, spooled_tempfile_in, SpooledTempFile};
+
+/// For the wasi platforms, `std::env::temp_dir` will panic. For those targets, configure the /tmp
+/// directory instead as the base directory for temp files.
+fn configure_wasi_temp_dir() {
+    if cfg!(target_os = "wasi") {
+        let _ = tempfile::env::override_temp_dir(std::path::Path::new("/tmp"));
+    }
+}
+
+#[test]
+fn test_automatic_rollover() {
+    configure_wasi_temp_dir();
+
+    let mut t = spooled_tempfile(10);
+    let mut buf = Vec::new();
+
+    assert!(!t.is_rolled());
+    assert_eq!(t.stream_position().unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 0);
+    assert_eq!(buf.as_slice(), b"");
+    buf.clear();
+
+    assert_eq!(t.write(b"abcde").unwrap(), 5);
+
+    assert!(!t.is_rolled());
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 5);
+    assert_eq!(buf.as_slice(), b"abcde");
+
+    assert_eq!(t.write(b"fghijklmno").unwrap(), 10);
+
+    assert_eq!(t.stream_position().unwrap(), 15);
+    assert!(t.is_rolled());
+}
+
+#[test]
+fn test_custom_dir() {
+    configure_wasi_temp_dir();
+
+    {
+        let mut t = spooled_tempfile_in(10, env::temp_dir());
+        t.roll()
+            .expect("failed to roll temp file in a specified directory");
+    }
+
+    {
+        let mut t = spooled_tempfile_in(10, "/does-not-exist/");
+        t.roll()
+            .expect_err("should fail to roll the temporary file into a nonexistent tempdir");
+    }
+}
+
+#[test]
+fn test_explicit_rollover() {
+    configure_wasi_temp_dir();
+
+    let mut t = SpooledTempFile::new(100);
+    assert_eq!(t.write(b"abcdefghijklmnopqrstuvwxyz").unwrap(), 26);
+    assert_eq!(t.stream_position().unwrap(), 26);
+    assert!(!t.is_rolled());
+
+    // roll over explicitly
+    assert!(t.roll().is_ok());
+    assert!(t.is_rolled());
+    assert_eq!(t.stream_position().unwrap(), 26);
+
+    let mut buf = Vec::new();
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 0);
+    assert_eq!(buf.as_slice(), b"");
+    buf.clear();
+
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 26);
+    assert_eq!(buf.as_slice(), b"abcdefghijklmnopqrstuvwxyz");
+    assert_eq!(t.stream_position().unwrap(), 26);
+}
+
+// called by test_seek_{buffer, file}
+// assumes t is empty and offset is 0 to start
+fn test_seek(t: &mut SpooledTempFile) {
+    configure_wasi_temp_dir();
+
+    assert_eq!(t.write(b"abcdefghijklmnopqrstuvwxyz").unwrap(), 26);
+
+    assert_eq!(t.stream_position().unwrap(), 26); // tell()
+    assert_eq!(t.seek(SeekFrom::Current(-1)).unwrap(), 25);
+    assert_eq!(t.seek(SeekFrom::Current(1)).unwrap(), 26);
+    assert_eq!(t.seek(SeekFrom::Current(1)).unwrap(), 27);
+    assert_eq!(t.seek(SeekFrom::Current(-27)).unwrap(), 0);
+    assert!(t.seek(SeekFrom::Current(-1)).is_err());
+    assert!(t.seek(SeekFrom::Current(-1245)).is_err());
+
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.seek(SeekFrom::Start(1)).unwrap(), 1);
+    assert_eq!(t.seek(SeekFrom::Start(26)).unwrap(), 26);
+    assert_eq!(t.seek(SeekFrom::Start(27)).unwrap(), 27);
+    // // these are build errors
+    // assert!(t.seek(SeekFrom::Start(-1)).is_err());
+    // assert!(t.seek(SeekFrom::Start(-1000)).is_err());
+
+    assert_eq!(t.seek(SeekFrom::End(0)).unwrap(), 26);
+    assert_eq!(t.seek(SeekFrom::End(-1)).unwrap(), 25);
+    assert_eq!(t.seek(SeekFrom::End(-26)).unwrap(), 0);
+    assert!(t.seek(SeekFrom::End(-27)).is_err());
+    assert!(t.seek(SeekFrom::End(-99)).is_err());
+    assert_eq!(t.seek(SeekFrom::End(1)).unwrap(), 27);
+    assert_eq!(t.seek(SeekFrom::End(1)).unwrap(), 27);
+}
+
+#[test]
+fn test_seek_buffer() {
+    configure_wasi_temp_dir();
+
+    let mut t = spooled_tempfile(100);
+    test_seek(&mut t);
+}
+
+#[test]
+fn test_seek_file() {
+    configure_wasi_temp_dir();
+
+    let mut t = SpooledTempFile::new(10);
+    test_seek(&mut t);
+}
+
+fn test_seek_read(t: &mut SpooledTempFile) {
+    configure_wasi_temp_dir();
+
+    assert_eq!(t.write(b"abcdefghijklmnopqrstuvwxyz").unwrap(), 26);
+
+    let mut buf = Vec::new();
+
+    // we're at the end
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 0);
+    assert_eq!(buf.as_slice(), b"");
+    buf.clear();
+
+    // seek to start, read whole thing
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 26);
+    assert_eq!(buf.as_slice(), b"abcdefghijklmnopqrstuvwxyz");
+    buf.clear();
+
+    // now we're at the end again
+    assert_eq!(t.stream_position().unwrap(), 26); // tell()
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 0);
+    assert_eq!(buf.as_slice(), b"");
+    buf.clear();
+
+    // seek to somewhere in the middle, read a bit
+    assert_eq!(t.seek(SeekFrom::Start(5)).unwrap(), 5);
+    let mut buf = [0; 5];
+    assert!(t.read_exact(&mut buf).is_ok());
+    assert_eq!(buf, *b"fghij");
+
+    // read again from current spot
+    assert_eq!(t.stream_position().unwrap(), 10); // tell()
+    assert!(t.read_exact(&mut buf).is_ok());
+    assert_eq!(buf, *b"klmno");
+
+    let mut buf = [0; 15];
+    // partial read
+    assert_eq!(t.read(&mut buf).unwrap(), 11);
+    assert_eq!(buf[0..11], *b"pqrstuvwxyz");
+
+    // try to read off the end: UnexpectedEof
+    assert!(t.read_exact(&mut buf).is_err());
+}
+
+#[test]
+fn test_seek_read_buffer() {
+    configure_wasi_temp_dir();
+
+    let mut t = spooled_tempfile(100);
+    test_seek_read(&mut t);
+}
+
+#[test]
+fn test_seek_read_file() {
+    configure_wasi_temp_dir();
+
+    let mut t = SpooledTempFile::new(10);
+    test_seek_read(&mut t);
+}
+
+fn test_overwrite_middle(t: &mut SpooledTempFile) {
+    configure_wasi_temp_dir();
+
+    assert_eq!(t.write(b"abcdefghijklmnopqrstuvwxyz").unwrap(), 26);
+
+    assert_eq!(t.seek(SeekFrom::Start(10)).unwrap(), 10);
+    assert_eq!(t.write(b"0123456789").unwrap(), 10);
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+
+    let mut buf = Vec::new();
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 26);
+    assert_eq!(buf.as_slice(), b"abcdefghij0123456789uvwxyz");
+}
+
+#[test]
+fn test_overwrite_middle_of_buffer() {
+    let mut t = spooled_tempfile(100);
+    test_overwrite_middle(&mut t);
+}
+
+#[test]
+fn test_overwrite_middle_of_file() {
+    let mut t = SpooledTempFile::new(10);
+    test_overwrite_middle(&mut t);
+}
+
+#[test]
+fn test_overwrite_and_extend_buffer() {
+    let mut t = spooled_tempfile(100);
+    assert_eq!(t.write(b"abcdefghijklmnopqrstuvwxyz").unwrap(), 26);
+    assert_eq!(t.seek(SeekFrom::End(-5)).unwrap(), 21);
+    assert_eq!(t.write(b"0123456789").unwrap(), 10);
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    let mut buf = Vec::new();
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 31);
+    assert_eq!(buf.as_slice(), b"abcdefghijklmnopqrstu0123456789");
+    assert!(!t.is_rolled());
+}
+
+#[test]
+fn test_overwrite_and_extend_rollover() {
+    configure_wasi_temp_dir();
+
+    let mut t = SpooledTempFile::new(20);
+    assert_eq!(t.write(b"abcdefghijklmno").unwrap(), 15);
+    assert!(!t.is_rolled());
+    assert_eq!(t.seek(SeekFrom::End(-5)).unwrap(), 10);
+    assert_eq!(t.stream_position().unwrap(), 10); // tell()
+    assert!(!t.is_rolled());
+    assert_eq!(t.write(b"0123456789)!@#$%^&*(").unwrap(), 20);
+    assert!(t.is_rolled());
+    assert_eq!(t.stream_position().unwrap(), 30); // tell()
+    let mut buf = Vec::new();
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 30);
+    assert_eq!(buf.as_slice(), b"abcdefghij0123456789)!@#$%^&*(");
+}
+
+fn test_sparse(t: &mut SpooledTempFile) {
+    assert_eq!(t.write(b"abcde").unwrap(), 5);
+    assert_eq!(t.seek(SeekFrom::Current(5)).unwrap(), 10);
+    assert_eq!(t.write(b"klmno").unwrap(), 5);
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    let mut buf = Vec::new();
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 15);
+    assert_eq!(buf.as_slice(), b"abcde\0\0\0\0\0klmno");
+}
+
+#[test]
+fn test_sparse_buffer() {
+    let mut t = spooled_tempfile(100);
+    test_sparse(&mut t);
+}
+
+#[test]
+fn test_sparse_file() {
+    configure_wasi_temp_dir();
+
+    let mut t = SpooledTempFile::new(1);
+    test_sparse(&mut t);
+}
+
+#[test]
+fn test_sparse_write_rollover() {
+    configure_wasi_temp_dir();
+
+    let mut t = spooled_tempfile(10);
+    assert_eq!(t.write(b"abcde").unwrap(), 5);
+    assert!(!t.is_rolled());
+    assert_eq!(t.seek(SeekFrom::Current(5)).unwrap(), 10);
+    assert!(!t.is_rolled());
+    assert_eq!(t.write(b"klmno").unwrap(), 5);
+    assert!(t.is_rolled());
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    let mut buf = Vec::new();
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 15);
+    assert_eq!(buf.as_slice(), b"abcde\0\0\0\0\0klmno");
+}
+
+fn test_set_len(t: &mut SpooledTempFile) {
+    let mut buf: Vec<u8> = Vec::new();
+
+    assert_eq!(t.write(b"abcdefghijklmnopqrstuvwxyz").unwrap(), 26);
+
+    // truncate to 10 bytes
+    assert!(t.set_len(10).is_ok());
+
+    // position should not have moved
+    assert_eq!(t.stream_position().unwrap(), 26); // tell()
+
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 0);
+    assert_eq!(buf.as_slice(), b"");
+    assert_eq!(t.stream_position().unwrap(), 26); // tell()
+    buf.clear();
+
+    // read whole thing
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 10);
+    assert_eq!(buf.as_slice(), b"abcdefghij");
+    buf.clear();
+
+    // set_len to expand beyond the end
+    assert!(t.set_len(40).is_ok());
+    assert_eq!(t.stream_position().unwrap(), 10); // tell()
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 40);
+    assert_eq!(
+        buf.as_slice(),
+        &b"abcdefghij\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"[..]
+    );
+}
+
+#[test]
+fn test_set_len_buffer() {
+    let mut t = spooled_tempfile(100);
+    test_set_len(&mut t);
+}
+
+#[test]
+fn test_set_len_file() {
+    let mut t = spooled_tempfile(100);
+    test_set_len(&mut t);
+}
+
+#[test]
+fn test_set_len_rollover() {
+    configure_wasi_temp_dir();
+
+    let mut buf: Vec<u8> = Vec::new();
+
+    let mut t = spooled_tempfile(10);
+    assert_eq!(t.write(b"abcde").unwrap(), 5);
+    assert!(!t.is_rolled());
+    assert_eq!(t.stream_position().unwrap(), 5); // tell()
+
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 5);
+    assert_eq!(buf.as_slice(), b"abcde");
+    assert_eq!(t.stream_position().unwrap(), 5); // tell()
+    buf.clear();
+
+    assert!(t.set_len(20).is_ok());
+    assert!(t.is_rolled());
+    assert_eq!(t.stream_position().unwrap(), 5); // tell()
+    assert_eq!(t.seek(SeekFrom::Start(0)).unwrap(), 0);
+    assert_eq!(t.read_to_end(&mut buf).unwrap(), 20);
+    assert_eq!(buf.as_slice(), b"abcde\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");
+}
+
+#[test]
+fn test_write_overflow() {
+    configure_wasi_temp_dir();
+
+    let mut t = spooled_tempfile(10);
+    t.seek(SeekFrom::Start(u64::MAX)).unwrap();
+    assert!(t.write(b"abcde").is_err());
+}
+
+#[cfg(target_pointer_width = "32")]
+#[test]
+fn test_set_len_truncation() {
+    configure_wasi_temp_dir();
+
+    let mut t = spooled_tempfile(100);
+    assert!(t.set_len(usize::MAX as u64 + 5).is_ok());
+    assert!(t.is_rolled());
+}

vendor/tempfile/tests/tempdir.rs

@@ -0,0 +1,196 @@
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![deny(rust_2018_idioms)]
+
+use std::fs;
+use std::path::Path;
+
+use tempfile::{Builder, TempDir};
+
+/// For the wasi platforms, `std::env::temp_dir` will panic. For those targets, configure the /tmp
+/// directory instead as the base directory for temp files.
+fn configure_wasi_temp_dir() {
+    if cfg!(target_os = "wasi") {
+        let _ = tempfile::env::override_temp_dir(std::path::Path::new("/tmp"));
+    }
+}
+
+#[test]
+fn test_tempdir() {
+    configure_wasi_temp_dir();
+
+    let path = {
+        let p = Builder::new().prefix("foobar").tempdir().unwrap();
+        let p = p.path();
+        assert!(p.to_str().unwrap().contains("foobar"));
+        p.to_path_buf()
+    };
+    assert!(!path.exists());
+}
+
+#[test]
+fn test_prefix() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = TempDir::with_prefix("prefix").unwrap();
+    let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
+    assert!(name.starts_with("prefix"));
+}
+
+#[test]
+fn test_suffix() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = TempDir::with_suffix("suffix").unwrap();
+    let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
+    assert!(name.ends_with("suffix"));
+}
+
+#[test]
+fn test_customnamed() {
+    configure_wasi_temp_dir();
+
+    let tmpfile = Builder::new()
+        .prefix("prefix")
+        .suffix("suffix")
+        .rand_bytes(12)
+        .tempdir()
+        .unwrap();
+    let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
+    assert!(name.starts_with("prefix"));
+    assert!(name.ends_with("suffix"));
+    assert_eq!(name.len(), 24);
+}
+
+#[test]
+#[cfg_attr(target_os = "wasi", ignore = "thread::spawn is not supported")]
+fn test_rm_tempdir_threading() {
+    configure_wasi_temp_dir();
+
+    use std::sync::mpsc::channel;
+    use std::thread;
+
+    let (tx, rx) = channel();
+    let f = move || {
+        let tmp = TempDir::new().unwrap();
+        tx.send(tmp.path().to_path_buf()).unwrap();
+        panic!("panic to unwind past `tmp`");
+    };
+    let _ = thread::spawn(f).join();
+    let path = rx.recv().unwrap();
+    assert!(!path.exists());
+
+    let tmp = TempDir::new().unwrap();
+    let path = tmp.path().to_path_buf();
+    let f = move || {
+        let _tmp = tmp;
+        panic!("panic to unwind past `tmp`");
+    };
+    let _ = thread::spawn(f).join();
+    assert!(!path.exists());
+
+    let path;
+    {
+        let f = move || TempDir::new().unwrap();
+
+        let tmp = thread::spawn(f).join().unwrap();
+        path = tmp.path().to_path_buf();
+        assert!(path.exists());
+    }
+    assert!(!path.exists());
+}
+
+#[test]
+fn test_tempdir_keep() {
+    configure_wasi_temp_dir();
+
+    let path = {
+        let tmp = TempDir::new().unwrap();
+        tmp.keep()
+    };
+    assert!(path.exists());
+    fs::remove_dir_all(&path).unwrap();
+    assert!(!path.exists());
+}
+
+#[test]
+fn test_tmpdir_close() {
+    configure_wasi_temp_dir();
+
+    let tmp = TempDir::new().unwrap();
+    let path = tmp.path().to_path_buf();
+    assert!(path.exists());
+    tmp.close().unwrap();
+    assert!(!path.exists());
+}
+
+#[test]
+#[cfg_attr(target_os = "wasi", ignore = "unwinding is not supported")]
+fn dont_double_panic() {
+    configure_wasi_temp_dir();
+
+    use std::thread;
+    let r: Result<(), _> = thread::spawn(move || {
+        let tmpdir = TempDir::new().unwrap();
+        // Remove the temporary directory so that TempDir sees
+        // an error on drop
+        fs::remove_dir(tmpdir.path()).unwrap();
+        // Panic. If TempDir panics *again* due to the rmdir
+        // error then the process will abort.
+        panic!();
+    })
+    .join();
+    assert!(r.is_err());
+}
+
+#[test]
+fn pass_as_asref_path() {
+    configure_wasi_temp_dir();
+
+    let tempdir = TempDir::new().unwrap();
+    takes_asref_path(&tempdir);
+
+    fn takes_asref_path<T: AsRef<Path>>(path: T) {
+        let path = path.as_ref();
+        assert!(path.exists());
+    }
+}
+
+#[test]
+fn test_disable_cleanup() {
+    configure_wasi_temp_dir();
+
+    // Case 0: never mark as "disable cleanup"
+    // Case 1: enable "disable cleanup" in the builder, don't touch it after.
+    // Case 2: enable "disable cleanup" in the builder, turn it off after.
+    // Case 3: don't enable disable cleanup in the builder, turn it on after.
+    for case in 0..4 {
+        let in_builder = case & 1 > 0;
+        let toggle = case & 2 > 0;
+        let mut tmpdir = Builder::new()
+            .disable_cleanup(in_builder)
+            .tempdir()
+            .unwrap();
+        if toggle {
+            tmpdir.disable_cleanup(!in_builder);
+        }
+
+        let path = tmpdir.path().to_owned();
+        drop(tmpdir);
+
+        if in_builder ^ toggle {
+            assert!(path.exists());
+            fs::remove_dir(path).unwrap();
+        } else {
+            assert!(!path.exists(), "tempdir wasn't deleted");
+        }
+    }
+}

vendor/tempfile/tests/tempfile.rs

@@ -0,0 +1,78 @@
+#![deny(rust_2018_idioms)]
+
+use std::fs;
+use std::io::{Read, Seek, SeekFrom, Write};
+#[cfg(target_os = "linux")]
+use std::{
+    sync::mpsc::{sync_channel, TryRecvError},
+    thread,
+};
+
+#[test]
+fn test_basic() {
+    // For the wasi platforms, `std::env::temp_dir` will panic. For those targets, configure the /tmp
+    // directory instead as the base directory for temp files.
+    #[cfg(target_os = "wasi")]
+    let _ = tempfile::env::override_temp_dir(std::path::Path::new("/tmp"));
+
+    let mut tmpfile = tempfile::tempfile().unwrap();
+    write!(tmpfile, "abcde").unwrap();
+    tmpfile.seek(SeekFrom::Start(0)).unwrap();
+    let mut buf = String::new();
+    tmpfile.read_to_string(&mut buf).unwrap();
+    assert_eq!("abcde", buf);
+}
+
+#[test]
+fn test_cleanup() {
+    // For the wasi platforms, `std::env::temp_dir` will panic. For those targets, configure the /tmp
+    // directory instead as the base directory for temp files.
+    #[cfg(target_os = "wasi")]
+    let _ = tempfile::env::override_temp_dir(std::path::Path::new("/tmp"));
+
+    let tmpdir = tempfile::tempdir().unwrap();
+    {
+        let mut tmpfile = tempfile::tempfile_in(&tmpdir).unwrap();
+        write!(tmpfile, "abcde").unwrap();
+    }
+    let num_files = fs::read_dir(&tmpdir).unwrap().count();
+    assert!(num_files == 0);
+}
+
+// Only run this test on Linux. MacOS doesn't like us creating so many files, apparently.
+#[cfg(target_os = "linux")]
+#[test]
+fn test_pathological_cleaner() {
+    let tmpdir = tempfile::tempdir().unwrap();
+    let (tx, rx) = sync_channel(0);
+    let cleaner_thread = thread::spawn(move || {
+        let tmp_path = rx.recv().unwrap();
+        while rx.try_recv() == Err(TryRecvError::Empty) {
+            let files = fs::read_dir(&tmp_path).unwrap();
+            for f in files {
+                // skip errors
+                if f.is_err() {
+                    continue;
+                }
+                let f = f.unwrap();
+                let _ = fs::remove_file(f.path());
+            }
+        }
+    });
+
+    // block until cleaner_thread makes progress
+    tx.send(tmpdir.path().to_owned()).unwrap();
+    // need 40-400 iterations to encounter race with cleaner on original system
+    for _ in 0..10000 {
+        let mut tmpfile = tempfile::tempfile_in(&tmpdir).unwrap();
+        write!(tmpfile, "abcde").unwrap();
+        tmpfile.seek(SeekFrom::Start(0)).unwrap();
+        let mut buf = String::new();
+        tmpfile.read_to_string(&mut buf).unwrap();
+        assert_eq!("abcde", buf);
+    }
+
+    // close the channel to make cleaner_thread exit
+    drop(tx);
+    cleaner_thread.join().expect("The cleaner thread failed");
+}