fix: refresh diff colors on terminal theme changes

vendor/crossterm/src/tty.rs

@@ -0,0 +1,54 @@
+//! Making it a little more convenient and safe to query whether
+//! something is a terminal teletype or not.
+//! This module defines the IsTty trait and the is_tty method to
+//! return true if the item represents a terminal.
+
+#[cfg(unix)]
+use std::os::unix::io::AsRawFd;
+#[cfg(windows)]
+use std::os::windows::io::AsRawHandle;
+
+#[cfg(windows)]
+use winapi::um::consoleapi::GetConsoleMode;
+
+/// Adds the `is_tty` method to types that might represent a terminal
+///
+/// ```rust
+/// use std::io::stdout;
+/// use crossterm::tty::IsTty;
+///
+/// let is_tty: bool = stdout().is_tty();
+/// ```
+pub trait IsTty {
+    /// Returns true when an instance is a terminal teletype, otherwise false.
+    fn is_tty(&self) -> bool;
+}
+
+/// On UNIX, the `isatty()` function returns true if a file
+/// descriptor is a terminal.
+#[cfg(all(unix, feature = "libc"))]
+impl<S: AsRawFd> IsTty for S {
+    fn is_tty(&self) -> bool {
+        let fd = self.as_raw_fd();
+        unsafe { libc::isatty(fd) == 1 }
+    }
+}
+
+#[cfg(all(unix, not(feature = "libc")))]
+impl<S: AsRawFd> IsTty for S {
+    fn is_tty(&self) -> bool {
+        let fd = self.as_raw_fd();
+        rustix::termios::isatty(unsafe { std::os::unix::io::BorrowedFd::borrow_raw(fd) })
+    }
+}
+
+/// On windows, `GetConsoleMode` will return true if we are in a terminal.
+/// Otherwise false.
+#[cfg(windows)]
+impl<S: AsRawHandle> IsTty for S {
+    fn is_tty(&self) -> bool {
+        let mut mode = 0;
+        let ok = unsafe { GetConsoleMode(self.as_raw_handle() as *mut _, &mut mode) };
+        ok == 1
+    }
+}