1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/rust/textwrap/src/termwidth.rs b/third_party/rust/textwrap/src/termwidth.rs
new file mode 100644
index 0000000000..5c66191b77
--- /dev/null
+++ b/third_party/rust/textwrap/src/termwidth.rs
@@ -0,0 +1,52 @@
+//! Functions related to the terminal size.
+
+use crate::Options;
+
+/// Return the current terminal width.
+///
+/// If the terminal width cannot be determined (typically because the
+/// standard output is not connected to a terminal), a default width
+/// of 80 characters will be used.
+///
+/// # Examples
+///
+/// Create an [`Options`] for wrapping at the current terminal width
+/// with a two column margin to the left and the right:
+///
+/// ```no_run
+/// use textwrap::{termwidth, Options};
+///
+/// let width = termwidth() - 4; // Two columns on each side.
+/// let options = Options::new(width)
+///     .initial_indent("  ")
+///     .subsequent_indent("  ");
+/// ```
+///
+/// **Note:** Only available when the `terminal_size` Cargo feature is
+/// enabled.
+pub fn termwidth() -> usize {
+    terminal_size::terminal_size().map_or(80, |(terminal_size::Width(w), _)| w.into())
+}
+
+impl<'a> Options<'a> {
+    /// Creates a new [`Options`] with `width` set to the current
+    /// terminal width. If the terminal width cannot be determined
+    /// (typically because the standard input and output is not
+    /// connected to a terminal), a width of 80 characters will be
+    /// used. Other settings use the same defaults as
+    /// [`Options::new`].
+    ///
+    /// Equivalent to:
+    ///
+    /// ```no_run
+    /// use textwrap::{termwidth, Options};
+    ///
+    /// let options = Options::new(termwidth());
+    /// ```
+    ///
+    /// **Note:** Only available when the `terminal_size` feature is
+    /// enabled.
+    pub fn with_termwidth() -> Self {
+        Self::new(termwidth())
+    }
+}