Merging upstream version 1.67.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

12 files changed, 1828 insertions, 0 deletions

diff --git a/vendor/yansi/.cargo-checksum.json b/vendor/yansi/.cargo-checksum.json
new file mode 100644
index 000000000..5a3316faa
--- /dev/null
+++ b/vendor/yansi/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"7de20a74b3fd6c17d816363702d8e31404882b4917f2ea2d4bddbd636c5b36e6","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"ce1f970284c4ab06e90671a984086692dc44da3e2b8ee86444d79b6f77bcf9e7","README.md":"68b88ba6234790f5e4b9fc3e7923192e74629ec5211742961324e29417c9fedb","src/color.rs":"8242495e4890dc2e46b8a7b95a9a42f0561b19af7b478c9332db97b3a5f33dad","src/lib.rs":"489a80d7e31a75d8cc8df610e4d507cdfb5a2badd25a29b390a2e66d6fa20daf","src/macros.rs":"73c8ec577907f937b1a2040c81f3bc173379e6b420a16f5704b69cc2872f0ffa","src/paint.rs":"b11f28923d51818244481a879ba96653288f9da9dac8952aacdb5a715e15c1b3","src/style.rs":"50e50a22a23847e4a409734454485081b70666bf7c9697e70a7eff4a9480d9b3","src/tests.rs":"c45bb10aacccf61599e1a98a1906c8e0fe206032605245f6c9f6ce2dfd8ffd41","src/windows.rs":"b0df2a812d23d8ce6e8b243f6e237d02892ff89b33670e6e5c788ba699b1f7dc"},"package":"09041cd90cf85f7f8b2df60c646f853b7f535ce68f85244eb6731cf89fa498ec"}
\ No newline at end of file
diff --git a/vendor/yansi/Cargo.toml b/vendor/yansi/Cargo.toml
new file mode 100644
index 000000000..6f03752ac
--- /dev/null
+++ b/vendor/yansi/Cargo.toml
@@ -0,0 +1,37 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+name = "yansi"
+version = "0.5.1"
+authors = ["Sergio Benitez <sb@sergio.bz>"]
+description = "A dead simple ANSI terminal color painting library."
+documentation = "https://docs.rs/yansi"
+readme = "README.md"
+keywords = [
+    "ansi",
+    "terminal",
+    "color",
+    "format",
+    "paint",
+]
+categories = ["command-line-interface"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/SergioBenitez/yansi"
+
+[dependencies]
+
+[dev-dependencies.serial_test]
+version = "0.6"
+
+[badges.travis-ci]
+branch = "master"
+repository = "SergioBenitez/yansi"
diff --git a/vendor/yansi/LICENSE-APACHE b/vendor/yansi/LICENSE-APACHE
new file mode 100644
index 000000000..16fe87b06
--- /dev/null
+++ b/vendor/yansi/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
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+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
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+Unless required by applicable law or agreed to in writing, software
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diff --git a/vendor/yansi/LICENSE-MIT b/vendor/yansi/LICENSE-MIT
new file mode 100644
index 000000000..b551a84c8
--- /dev/null
+++ b/vendor/yansi/LICENSE-MIT
@@ -0,0 +1,19 @@
+The MIT License (MIT)
+Copyright (c) 2017 Sergio Benitez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/vendor/yansi/README.md b/vendor/yansi/README.md
new file mode 100644
index 000000000..90704d30f
--- /dev/null
+++ b/vendor/yansi/README.md
@@ -0,0 +1,47 @@
+# yansi
+
+[![Build Status](https://travis-ci.org/SergioBenitez/yansi.svg?branch=master)](https://travis-ci.org/SergioBenitez/yansi)
+[![Current Crates.io Version](https://img.shields.io/crates/v/yansi.svg)](https://crates.io/crates/yansi)
+[![Documentation](https://docs.rs/yansi/badge.svg)](https://docs.rs/yansi)
+
+A dead simple ANSI terminal color painting library for Rust.
+
+```rust
+use yansi::Paint;
+
+print!("{} light, {} light!", Paint::green("Green"), Paint::red("red").underline());
+```
+
+See the [documentation](https://docs.rs/yansi/) for more.
+
+# Why?
+
+Several terminal coloring libraries exist ([`ansi_term`], [`colored`],
+[`term_painter`], to name a few), begging the question: why yet another? Here
+are a few reasons:
+
+  * This library is _much_ simpler: there are three types!
+  * Unlike [`ansi_term`] or [`colored`], _any_ type implementing `Display`
+    or `Debug` can be stylized, not only strings.
+  * Styling can be enabled and disabled globally, on the fly.
+  * Arbitrary items can be [_masked_] for selective disabling.
+  * Styling can [_wrap_] any arbitrarily styled item.
+  * Typically only one type needs to be imported: `Paint`.
+  * Zero dependencies. It really is simple.
+  * The name `yansi` is pretty short.
+
+All that being said, this library borrows API ideas from the three libraries as
+well as implementation details from [`ansi_term`].
+
+[`ansi_term`]: https://crates.io/crates/ansi_term
+[`colored`]: https://crates.io/crates/colored
+[`term_painter`]: https://crates.io/crates/term-painter
+[_masked_]: https://docs.rs/yansi/#masking
+[_wrap_]: https://docs.rs/yansi/#wrapping
+
+## License
+
+`yansi` is licensed under either of the following, at your option:
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT License ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
diff --git a/vendor/yansi/src/color.rs b/vendor/yansi/src/color.rs
new file mode 100644
index 000000000..fee620a1d
--- /dev/null
+++ b/vendor/yansi/src/color.rs
@@ -0,0 +1,96 @@
+use std::fmt;
+
+use {Paint, Style};
+
+/// An enum representing an ANSI color code.
+#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Copy, Clone)]
+pub enum Color {
+    /// No color has been set. Nothing is changed when applied.
+    Unset,
+
+    /// Terminal default #9. (foreground code `39`, background code `49`).
+    Default,
+
+    /// Black #0 (foreground code `30`, background code `40`).
+    Black,
+
+    /// Red: #1 (foreground code `31`, background code `41`).
+    Red,
+
+    /// Green: #2 (foreground code `32`, background code `42`).
+    Green,
+
+    /// Yellow: #3 (foreground code `33`, background code `43`).
+    Yellow,
+
+    /// Blue: #4 (foreground code `34`, background code `44`).
+    Blue,
+
+    /// Magenta: #5 (foreground code `35`, background code `45`).
+    Magenta,
+
+    /// Cyan: #6 (foreground code `36`, background code `46`).
+    Cyan,
+
+    /// White: #7 (foreground code `37`, background code `47`).
+    White,
+
+    /// A color number from 0 to 255, for use in 256-color terminals.
+    Fixed(u8),
+
+    /// A 24-bit RGB color, as specified by ISO-8613-3.
+    RGB(u8, u8, u8),
+}
+
+impl Color {
+    /// Constructs a new `Paint` structure that encapsulates `item` with the
+    /// foreground color set to the color `self`.
+    ///
+    /// ```rust
+    /// use yansi::Color::Blue;
+    ///
+    /// println!("This is going to be blue: {}", Blue.paint("yay!"));
+    /// ```
+    #[inline]
+    pub fn paint<T>(self, item: T) -> Paint<T> {
+        Paint::new(item).fg(self)
+    }
+
+    /// Constructs a new `Style` structure with the foreground color set to the
+    /// color `self`.
+    ///
+    /// ```rust
+    /// use yansi::Color::Green;
+    ///
+    /// let success = Green.style().bold();
+    /// println!("Hey! {}", success.paint("Success!"));
+    /// ```
+    #[inline]
+    pub fn style(self) -> Style {
+        Style::new(self)
+    }
+
+    pub(crate) fn ascii_fmt(&self, f: &mut fmt::Write) -> fmt::Result {
+        match *self {
+            Color::Unset => Ok(()),
+            Color::Default => write!(f, "9"),
+            Color::Black => write!(f, "0"),
+            Color::Red => write!(f, "1"),
+            Color::Green => write!(f, "2"),
+            Color::Yellow => write!(f, "3"),
+            Color::Blue => write!(f, "4"),
+            Color::Magenta => write!(f, "5"),
+            Color::Cyan => write!(f, "6"),
+            Color::White => write!(f, "7"),
+            Color::Fixed(num) => write!(f, "8;5;{}", num),
+            Color::RGB(r, g, b) => write!(f, "8;2;{};{};{}", r, g, b),
+        }
+    }
+}
+
+impl Default for Color {
+    #[inline(always)]
+    fn default() -> Self {
+        Color::Unset
+    }
+}
diff --git a/vendor/yansi/src/lib.rs b/vendor/yansi/src/lib.rs
new file mode 100644
index 000000000..8fccd804c
--- /dev/null
+++ b/vendor/yansi/src/lib.rs
@@ -0,0 +1,214 @@
+#![doc(html_root_url = "https://docs.rs/yansi/0.6.0-dev")]
+
+//! A dead simple ANSI terminal color painting library.
+//!
+//! # Usage
+//!
+//! Usage is best illustrated via a quick example:
+//!
+//! ```rust
+//! use yansi::{Paint, Color};
+//!
+//! println!("Testing, {}, {}, {}!",
+//!     Paint::red(1),
+//!     Paint::green(2).bold().underline(),
+//!     Paint::blue("3").bg(Color::White).italic());
+//! ```
+//!
+//! ## Paint
+//!
+//! The main entry point into this library is the [`Paint`] type. `Paint`
+//! encapsulates a value of any type that implements the [`Display`] or
+//! [`Debug`] trait. When a `Paint` is `Display`ed or `Debug`ed, the appropriate
+//! ANSI escape characters are emitted before and after the wrapped type's `fmt`
+//! implementation.
+//!
+//! `Paint` can be constructed via [a myriad of methods]. In addition to these
+//! constructors, you can also use the [`color.paint()`](Color::paint()) method
+//! on a given [`Color`] value to construct a `Paint` type. Both of these
+//! approaches are shown below:
+//!
+//! ```rust
+//! use yansi::Paint;
+//! use yansi::Color::Red;
+//!
+//! println!("I'm {}!", Paint::red("red").bold());
+//! println!("I'm also {}!", Red.paint("red").bold());
+//! ```
+//! [`Display`]: ::std::fmt::Display
+//! [`Debug`]: ::std::fmt::Debug
+//! [a myriad of methods]: struct.Paint.html#unstyled-constructors
+//!
+//! ## Styling
+//!
+//! Modifications to the styling of an item can be made via [a number of
+//! chainable methods] on `Paint`.
+//!
+//! ```rust
+//! use yansi::Paint;
+//!
+//! Paint::new("hi").underline().invert().italic().dimmed().bold();
+//! ```
+//!
+//! Styling can also be created independently from a `Paint` structure via the
+//! [`Style`] structure. This allows common styling to be stored and reused. A
+//! `Style` can be applied via the [`style.paint()`] method or the
+//! [`paint.with_style()`] method:
+//!
+//! ```rust
+//! use yansi::{Paint, Color, Style};
+//!
+//! // A bold, itatlic style with red foreground.
+//! let alert = Style::new(Color::Red).bold().italic();
+//!
+//! // Using `style.paint()`; this is preferred.
+//! println!("Alert! {}", alert.paint("This is serious business!"));
+//! println!("Hi! {}", alert.underline().paint("Super serious!"));
+//!
+//! // Using `paint.with_style()`.
+//! println!("Alert! {}", Paint::new("Yet another.").with_style(alert));
+//! ```
+//!
+//! [a number of chainable methods]: struct.Paint.html#setters
+//! [`style.paint()`]: Style::paint()
+//! [`paint.with_style()`]: Paint::with_style()
+//!
+//! # Disabling
+//!
+//! Painting can be disabled globally via the [`Paint::disable()`] method. When
+//! painting is disabled, the `Display` and `Debug` implementations for `Paint`
+//! will emit the `Display` or `Debug` of the contained object and nothing else.
+//! Painting can be reenabled via the [`Paint::enable()`] method.
+//!
+//! One potential use of this feature is to allow users to control color ouput
+//! via an environment variable. For instance, to disable coloring if the
+//! `CLICOLOR` variable is set to `0`, you might write:
+//!
+//! ```rust
+//! # { if false { // we don't actually want to disable coloring
+//! use yansi::Paint;
+//!
+//! if let Ok(true) = std::env::var("CLICOLOR").map(|v| v == "0") {
+//!     Paint::disable();
+//! }
+//! # } }
+//! ```
+//!
+//! ## Masking
+//!
+//! Items can be arbitrarily _masked_. When an item is masked and painting is
+//! disabled, the `Display` and `Debug` implementations of `Paint` write
+//! nothing. This allows you to selectively omit output when painting is
+//! disabled. Values can be masked using the [`Paint::masked()`] constructor
+//! or [`paint.mask()`] and [`style.mask()`] style setters.
+//!
+//! [`paint.mask()`]: Paint::mask()
+//! [`style.mask()`]: Style::mask()
+//!
+//! One use for this feature is to print certain characters only when painting
+//! is enabled. For instance, you might wish to emit the 🎨 emoji when
+//! coloring is enabled but not otherwise. This can be accomplished by masking
+//! the emoji:
+//!
+//! ```rust
+//! use yansi::Paint;
+//!
+//! println!("I like colors!{}", Paint::masked(" 🎨"));
+//! ```
+//!
+//! This will print "I like colors! 🎨" when painting is enabled and "I like
+//! colors!" when painting is disabled.
+//!
+//! ## Wrapping
+//!
+//! Styling can be set to _wrap_ existing styles using either the
+//! [`Paint::wrapping()`] constructor or the [`paint.wrap()`] and
+//! [`style.wrap()`] style setters. When a style is _wrapping_, all color
+//! resets written out by the internal item's `Display` or `Debug`
+//! implementation are set to the styling of the wrapping style itself. In other
+//! words, the "default" style of the wrapped item is modified to be the
+//! wrapping style. This allows for easy wrapping of other colored text. Without
+//! this feature, the console would reset styling to the terminal's default
+//! style instead of the wrapping style.
+//!
+//! [`paint.wrap()`]: Paint::wrap()
+//! [`style.wrap()`]: Style::wrap()
+//!
+//! One use for this feature is to ensure that styling is consistently set
+//! across items that may already be styled, such as when logging.
+//!
+//! ```rust
+//! use yansi::{Paint, Color};
+//!
+//! let inner = format!("{} and {}", Paint::red("Stop"), Paint::green("Go"));
+//! println!("Hey! {}", Paint::wrapping(inner).fg(Color::Blue));
+//! ```
+//!
+//! This will print 'Hey!' unstyled, "Stop" in red, "and" in blue, and "Go" in
+//! green. Without wrapping, "and" would be unstyled as `Paint::red()` resets
+//! the style after printing the internal item.
+//!
+//! # Windows
+//!
+//! Coloring is supported on Windows beginning with the Windows 10 anniversary
+//! update. Since this update, Windows consoles support ANSI escape sequences.
+//! This support, however, must be explicitly enabled. `yansi` provides the
+//! [`Paint::enable_windows_ascii()`] method to enable ASCII support on Windows
+//! consoles when available.
+//!
+//! ```rust
+//! use yansi::Paint;
+//!
+//! // Enable ASCII escape sequence support on Windows consoles.
+//! Paint::enable_windows_ascii();
+//! ```
+//!
+//! You may wish to disable coloring on unsupported Windows consoles to avoid
+//! emitting unrecognized ASCII escape sequences:
+//!
+//! ```rust
+//! use yansi::Paint;
+//!
+//! if cfg!(windows) && !Paint::enable_windows_ascii() {
+//!     Paint::disable();
+//! }
+//! ```
+//!
+//! [`Paint::enable_windows_ascii()`]: Paint::enable_windows_ascii()
+//!
+//! # Why?
+//!
+//! Several terminal coloring libraries exist ([`ansi_term`], [`colored`],
+//! [`term_painter`], to name a few), begging the question: why yet another?
+//! Here are a few reasons:
+//!
+//!   * This library is _much_ simpler: there are three types!
+//!   * Unlike [`ansi_term`] or [`colored`], _any_ type implementing `Display`
+//!     or `Debug` can be stylized, not only strings.
+//!   * Styling can be enabled and disabled globally, on the fly.
+//!   * Arbitrary items can be [_masked_] for selective disabling.
+//!   * Styling can [_wrap_] any arbitrarily styled item.
+//!   * Typically only one type needs to be imported: [`Paint`].
+//!   * Zero dependencies. It really is simple.
+//!   * The name `yansi` is pretty short.
+//!
+//! All that being said, this library borrows API ideas from the three libraries
+//! as well as implementation details from [`ansi_term`].
+//!
+//! [`ansi_term`]: https://crates.io/crates/ansi_term
+//! [`colored`]: https://crates.io/crates/colored
+//! [`term_painter`]: https://crates.io/crates/term-painter
+//! [_masked_]: #masking
+//! [_wrap_]: #wrapping
+
+#[macro_use] mod macros;
+
+#[cfg(test)] mod tests;
+mod windows;
+mod paint;
+mod style;
+mod color;
+
+pub use color::Color;
+pub use style::Style;
+pub use paint::Paint;
diff --git a/vendor/yansi/src/macros.rs b/vendor/yansi/src/macros.rs
new file mode 100644
index 000000000..b7c0b0339
--- /dev/null
+++ b/vendor/yansi/src/macros.rs
@@ -0,0 +1,19 @@
+macro_rules! style_builder_for {
+    ($T:ty, |$s:ident| $props:expr, $($name:ident: $property:ident),*) => ($(
+        #[doc = concat!(
+            "Enables the _", stringify!($name), "_ style on `self`.\n",
+            "```rust\n",
+            "use yansi::Paint;\n",
+            "\n",
+            "println!(\"Using ", stringify!($name), ": {}\", ",
+                "Paint::new(\"hi\").", stringify!($name), "());\n",
+            "```\n"
+        )]
+        #[inline]
+        pub fn $name(self) -> $T {
+            let mut $s = self;
+            $props.set(Property::$property);
+            $s
+        }
+    )*)
+}
diff --git a/vendor/yansi/src/paint.rs b/vendor/yansi/src/paint.rs
new file mode 100644
index 000000000..9ead595cd
--- /dev/null
+++ b/vendor/yansi/src/paint.rs
@@ -0,0 +1,463 @@
+use std::fmt;
+
+use style::{Style, Property};
+use color::Color;
+
+/// A structure encapsulating an item and styling.
+///
+/// See the [crate level documentation](./) for usage information.
+///
+/// # Method Glossary
+///
+/// The `Paint` structure exposes many methods for convenience.
+///
+/// ### Unstyled Constructors
+///
+/// Return a new `Paint` structure with no or default styling applied.
+///
+///   * [`Paint::new(item: T)`](Paint::new())
+///   * [`Paint::default(item: T)`](Paint::default())
+///   * [`Paint::masked(item: T)`](Paint::masked())
+///   * [`Paint::wrapping(item: T)`](Paint::wrapping())
+///
+/// ### Foreground Color Constructors
+///
+/// Return a new `Paint` structure with a foreground color applied.
+///
+///   * [`Paint::rgb(r: u8, g: u8, b: u8, item: T)`](Paint::rgb())
+///   * [`Paint::fixed(color: u8, item: T)`](Paint::fixed())
+///   * [`Paint::black(item: T)`](Paint::black())
+///   * [`Paint::red(item: T)`](Paint::red())
+///   * [`Paint::green(item: T)`](Paint::green())
+///   * [`Paint::yellow(item: T)`](Paint::yellow())
+///   * [`Paint::blue(item: T)`](Paint::blue())
+///   * [`Paint::magenta(item: T)`](Paint::magenta())
+///   * [`Paint::cyan(item: T)`](Paint::cyan())
+///   * [`Paint::white(item: T)`](Paint::white())
+///
+/// ### Getters
+///
+/// Return information about the `Paint` structure.
+///
+///   * [`paint.style()`](Paint::style())
+///   * [`paint.inner()`](Paint::inner())
+///
+/// ### Setters
+///
+/// Set a style property on a given `Paint` structure.
+///
+///   * [`paint.with_style(style: Style)`](Paint::with_style())
+///   * [`paint.mask()`](Paint::mask())
+///   * [`paint.wrap()`](Paint::wrap())
+///   * [`paint.fg(color: Color)`](Paint::fg())
+///   * [`paint.bg(color: Color)`](Paint::bg())
+///   * [`paint.bold()`](Paint::bold())
+///   * [`paint.dimmed()`](Paint::dimmed())
+///   * [`paint.italic()`](Paint::italic())
+///   * [`paint.underline()`](Paint::underline())
+///   * [`paint.blink()`](Paint::blink())
+///   * [`paint.invert()`](Paint::invert())
+///   * [`paint.hidden()`](Paint::hidden())
+///   * [`paint.strikethrough()`](Paint::strikethrough())
+///
+/// These methods can be chained:
+///
+/// ```rust
+/// use yansi::Paint;
+///
+/// Paint::new("hi").underline().invert().italic().dimmed().bold();
+/// ```
+///
+/// ### Global Methods
+///
+/// Modify or observe the global behavior of painting.
+///
+///   * [`Paint::enable()`](Paint::enable())
+///   * [`Paint::disable()`](Paint::disable())
+///   * [`Paint::is_enabled()`](Paint::is_enabled())
+///   * [`Paint::enable_windows_ascii()`](Paint::enable_windows_ascii())
+#[derive(Default, Eq, PartialEq, Ord, PartialOrd, Hash, Copy, Clone)]
+pub struct Paint<T> {
+    item: T,
+    style: Style,
+}
+
+macro_rules! constructors_for {
+    ($T:ty, $($name:ident: $color:ident),*) => ($(
+        #[doc = concat!(
+            "Constructs a new `Paint` structure encapsulating `item` with the foreground color\n",
+            "set to ", stringify!($name), ".\n",
+            "```rust\n",
+            "use yansi::Paint;\n",
+            "\n",
+            "println!(\"This is going to be ", stringify!($name),
+                ": {}\", Paint::", stringify!($name), "(\"yay!\"));\n",
+            "```\n"
+        )]
+        #[inline]
+        pub fn $name(item: $T) -> Paint<$T> {
+            Paint::new(item).fg(Color::$color)
+        }
+    )*)
+}
+
+impl<T> Paint<T> {
+    /// Constructs a new `Paint` structure encapsulating `item` with no set
+    /// styling.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// assert_eq!(Paint::new("hello!").to_string(), "hello!".to_string());
+    /// ```
+    #[inline]
+    pub fn new(item: T) -> Paint<T> {
+        Paint { item, style: Style::default() }
+    }
+
+    /// Constructs a new `Paint` structure encapsulating `item` with the active
+    /// terminal's default foreground and background.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// println!("This is going to use {}!", Paint::default("default colors"));
+    /// ```
+    #[inline]
+    pub fn default(item: T) -> Paint<T> {
+        Paint::new(item).fg(Color::Default).bg(Color::Default)
+    }
+
+    /// Constructs a new _masked_ `Paint` structure encapsulating `item` with
+    /// no set styling.
+    ///
+    /// A masked `Paint` is not written out when painting is disabled during
+    /// `Display` or `Debug` invocations. When painting is enabled, masking has
+    /// no effect.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// // The emoji won't be printed when coloring is disabled.
+    /// println!("{}Sprout!", Paint::masked("🌱 "));
+    /// ```
+    #[inline]
+    pub fn masked(item: T) -> Paint<T> {
+        Paint::new(item).mask()
+    }
+
+    /// Constructs a new _wrapping_ `Paint` structure encapsulating `item` with
+    /// default styling.
+    ///
+    /// A wrapping `Paint` converts all color resets written out by the internal
+    /// value to the styling of itself. This allows for seamless color wrapping
+    /// of other colored text.
+    ///
+    /// # Performance
+    ///
+    /// In order to wrap an internal value, the internal value must first be
+    /// written out to a local buffer and examined. As a result, displaying a
+    /// wrapped value is likely to result in a heap allocation and copy.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use yansi::{Paint, Color};
+    ///
+    /// let inner = format!("{} and {}", Paint::red("Stop"), Paint::green("Go"));
+    ///
+    /// // 'Hey!' will be unstyled, "Stop" will be red, "and" will be blue, and
+    /// // "Go" will be green. Without a wrapping `Paint`, "and" would be
+    /// // unstyled.
+    /// println!("Hey! {}", Paint::wrapping(inner).fg(Color::Blue));
+    /// ```
+    #[inline]
+    pub fn wrapping(item: T) -> Paint<T> {
+        Paint::new(item).wrap()
+    }
+
+    /// Constructs a new `Paint` structure encapsulating `item` with the
+    /// foreground color set to the RGB color `r`, `g`, `b`.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// println!("This is going to be funky: {}", Paint::rgb(70, 130, 122, "hi!"));
+    /// ```
+    #[inline]
+    pub fn rgb(r: u8, g: u8, b: u8, item: T) -> Paint<T> {
+        Paint::new(item).fg(Color::RGB(r, g, b))
+    }
+
+    /// Constructs a new `Paint` structure encapsulating `item` with the
+    /// foreground color set to the fixed 8-bit color `color`.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// println!("This is going to be funky: {}", Paint::fixed(100, "hi!"));
+    /// ```
+    #[inline]
+    pub fn fixed(color: u8, item: T) -> Paint<T> {
+        Paint::new(item).fg(Color::Fixed(color))
+    }
+
+    constructors_for!(T, black: Black, red: Red, green: Green, yellow: Yellow,
+        blue: Blue, magenta: Magenta, cyan: Cyan, white: White);
+
+    /// Retrieves the style currently set on `self`.
+    ///
+    /// ```rust
+    /// use yansi::{Style, Color, Paint};
+    ///
+    /// let alert = Style::new(Color::Red).bold().underline();
+    /// let painted = Paint::red("hi").bold().underline();
+    ///
+    /// assert_eq!(alert, painted.style());
+    /// ```
+    #[inline]
+    pub fn style(&self) -> Style {
+        self.style
+    }
+
+    /// Retrieves a borrow to the inner item.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// let x = Paint::red("Hello, world!");
+    /// assert_eq!(*x.inner(), "Hello, world!");
+    /// ```
+    #[inline]
+    pub fn inner(&self) -> &T {
+        &self.item
+    }
+
+    /// Sets the style of `self` to `style`.
+    ///
+    /// Any styling currently set on `self` is lost. Prefer to use the
+    /// [`style.paint()`](Style::paint()) method to create a `Paint` struct from
+    /// `Style`.
+    ///
+    /// ```rust
+    /// use yansi::{Paint, Color, Style};
+    ///
+    /// let s = Style::new(Color::Red).bold().underline();
+    ///
+    /// // Using this method.
+    /// println!("Alert: {}", Paint::new("This thing happened!").with_style(s));
+    ///
+    /// // Using the `style.paint()` method.
+    /// println!("Alert: {}", s.paint("This thing happened!"));
+    /// ```
+    #[inline]
+    pub fn with_style(mut self, style: Style) -> Paint<T> {
+        self.style = style;
+        self
+    }
+
+    /// Masks `self`.
+    ///
+    /// A masked `Paint` is not written out when painting is disabled during
+    /// `Display` or `Debug` invocations. When painting is enabled, masking has
+    /// no effect.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// // "Whoops! " will only print when coloring is enabled.
+    /// println!("{}Something happened.", Paint::red("Whoops! ").mask());
+    /// ```
+    #[inline]
+    pub fn mask(mut self) -> Paint<T> {
+        self.style.masked = true;
+        self
+    }
+
+    /// Makes `self` a _wrapping_ `Paint`.
+    ///
+    /// A wrapping `Paint` converts all color resets written out by the internal
+    /// value to the styling of itself. This allows for seamless color wrapping
+    /// of other colored text.
+    ///
+    /// # Performance
+    ///
+    /// In order to wrap an internal value, the internal value must first be
+    /// written out to a local buffer and examined. As a result, displaying a
+    /// wrapped value is likely to result in a heap allocation and copy.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use yansi::{Paint, Color};
+    ///
+    /// let inner = format!("{} and {}", Paint::red("Stop"), Paint::green("Go"));
+    ///
+    /// // 'Hey!' will be unstyled, "Stop" will be red, "and" will be blue, and
+    /// // "Go" will be green. Without a wrapping `Paint`, "and" would be
+    /// // unstyled.
+    /// println!("Hey! {}", Paint::blue(inner).wrap());
+    /// ```
+    #[inline]
+    pub fn wrap(mut self) -> Paint<T> {
+        self.style.wrap = true;
+        self
+    }
+
+    /// Sets the foreground to `color`.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    /// use yansi::Color::Red;
+    ///
+    /// println!("Red foreground: {}", Paint::new("hi!").fg(Red));
+    /// ```
+    #[inline]
+    pub fn fg(mut self, color: Color) -> Paint<T> {
+        self.style.foreground = color;
+        self
+    }
+
+    /// Sets the background to `color`.
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    /// use yansi::Color::Yellow;
+    ///
+    /// println!("Yellow background: {}", Paint::new("hi!").bg(Yellow));
+    /// ```
+    #[inline]
+    pub fn bg(mut self, color: Color) -> Paint<T> {
+        self.style.background = color;
+        self
+    }
+
+    style_builder_for!(Paint<T>, |paint| paint.style.properties,
+                       bold: BOLD, dimmed: DIMMED, italic: ITALIC,
+                       underline: UNDERLINE, blink: BLINK, invert: INVERT,
+                       hidden: HIDDEN, strikethrough: STRIKETHROUGH);
+}
+
+macro_rules! impl_fmt_trait {
+    ($trait:ident, $fmt:expr) => (
+        impl<T: fmt::$trait> fmt::$trait for Paint<T> {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                if Paint::is_enabled() && self.style.wrap {
+                    let mut prefix = String::new();
+                    prefix.push_str("\x1B[0m");
+                    self.style.fmt_prefix(&mut prefix)?;
+
+                    self.style.fmt_prefix(f)?;
+                    let item = format!($fmt, self.item).replace("\x1B[0m", &prefix);
+                    fmt::$trait::fmt(&item, f)?;
+                    self.style.fmt_suffix(f)
+                } else if Paint::is_enabled() {
+                    self.style.fmt_prefix(f)?;
+                    fmt::$trait::fmt(&self.item, f)?;
+                    self.style.fmt_suffix(f)
+                } else if !self.style.masked {
+                    fmt::$trait::fmt(&self.item, f)
+                } else {
+                    Ok(())
+                }
+            }
+        }
+    )
+}
+
+impl_fmt_trait!(Display, "{}");
+impl_fmt_trait!(Debug, "{:?}");
+
+use std::sync::atomic::AtomicBool;
+use std::sync::atomic::Ordering;
+
+static ENABLED: AtomicBool = AtomicBool::new(true);
+
+impl Paint<()> {
+    /// Disables coloring globally.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// // With coloring enabled, ANSI color codes are emitted.
+    /// assert_ne!(Paint::green("go").to_string(), "go".to_string());
+    ///
+    /// // With coloring disabled, ANSI color codes are _not_ emitted.
+    /// Paint::disable();
+    /// assert_eq!(Paint::green("go").to_string(), "go".to_string());
+    /// ```
+    pub fn disable() {
+        ENABLED.store(false, Ordering::Release);
+    }
+
+    /// Enables coloring globally. Coloring is enabled by default, so this
+    /// method should only be called to _re_ enable coloring.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// // With coloring disabled, ANSI color codes are _not_ emitted.
+    /// Paint::disable();
+    /// assert_eq!(Paint::green("go").to_string(), "go".to_string());
+    ///
+    /// // Reenabling causes color code to be emitted.
+    /// Paint::enable();
+    /// assert_ne!(Paint::green("go").to_string(), "go".to_string());
+    /// ```
+    pub fn enable() {
+        ENABLED.store(true, Ordering::Release);
+    }
+
+    /// Returns `true` if coloring is enabled and `false` otherwise. Coloring is
+    /// enabled by default but can be enabled and disabled on-the-fly with the
+    /// [`Paint::enable()`] and [`Paint::disable()`] methods.
+    ///
+    /// [`Paint::disable()`]: struct.Paint.html#method.disable
+    /// [`Paint::enable()`]: struct.Paint.html#method.disable
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// // Coloring is enabled by default.
+    /// assert!(Paint::is_enabled());
+    ///
+    /// // Disable it with `Paint::disable()`.
+    /// Paint::disable();
+    /// assert!(!Paint::is_enabled());
+    ///
+    /// // Reenable with `Paint::enable()`.
+    /// Paint::enable();
+    /// assert!(Paint::is_enabled());
+    /// ```
+    pub fn is_enabled() -> bool {
+        ENABLED.load(Ordering::Acquire)
+    }
+
+    /// Enables ASCII terminal escape sequences on Windows consoles when
+    /// possible. Returns `true` if escape sequence support was successfully
+    /// enabled and `false` otherwise. On non-Windows targets, this method
+    /// always returns `true`.
+    ///
+    /// Support for escape sequences in Windows consoles was added in the
+    /// Windows 10 anniversary update. For targets with older Windows
+    /// installations, this method is expected to return `false`.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use yansi::Paint;
+    ///
+    /// // A best-effort Windows ASCII terminal support enabling.
+    /// Paint::enable_windows_ascii();
+    /// ```
+    #[inline]
+    pub fn enable_windows_ascii() -> bool {
+        ::windows::enable_ascii_colors()
+    }
+}
diff --git a/vendor/yansi/src/style.rs b/vendor/yansi/src/style.rs
new file mode 100644
index 000000000..3c4f49a17
--- /dev/null
+++ b/vendor/yansi/src/style.rs
@@ -0,0 +1,480 @@
+use std::hash::{Hash, Hasher};
+use std::fmt::{self, Display};
+use std::ops::BitOr;
+
+use {Paint, Color};
+
+#[derive(Default, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Copy, Clone)]
+pub struct Property(u8);
+
+impl Property {
+    pub const BOLD: Self = Property(1 << 0);
+    pub const DIMMED: Self = Property(1 << 1);
+    pub const ITALIC: Self = Property(1 << 2);
+    pub const UNDERLINE: Self = Property(1 << 3);
+    pub const BLINK: Self = Property(1 << 4);
+    pub const INVERT: Self = Property(1 << 5);
+    pub const HIDDEN: Self = Property(1 << 6);
+    pub const STRIKETHROUGH: Self = Property(1 << 7);
+
+    #[inline(always)]
+    pub fn contains(self, other: Property) -> bool {
+        (other.0 & self.0) == other.0
+    }
+
+    #[inline(always)]
+    pub fn set(&mut self, other: Property) {
+        self.0 |= other.0;
+    }
+
+    #[inline(always)]
+    pub fn iter(self) -> Iter {
+        Iter { index: 0, properties: self }
+    }
+}
+
+impl BitOr for Property {
+    type Output = Self;
+
+    #[inline(always)]
+    fn bitor(self, rhs: Self) -> Self {
+        Property(self.0 | rhs.0)
+    }
+}
+
+pub struct Iter {
+    index: u8,
+    properties: Property,
+}
+
+impl Iterator for Iter {
+    type Item = usize;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        while self.index < 8 {
+            let index = self.index;
+            self.index += 1;
+
+            if self.properties.contains(Property(1 << index)) {
+                return Some(index as usize);
+            }
+        }
+
+        None
+    }
+}
+
+/// Represents a set of styling options.
+///
+/// See the [crate level documentation](./) for usage information.
+///
+/// # Method Glossary
+///
+/// The `Style` structure exposes many methods for convenience. The majority of
+/// these methods are shared with [`Paint`](Paint).
+///
+/// ### Foreground Color Constructors
+///
+/// Return a new `Style` structure with a foreground `color` applied.
+///
+///   * [`Style::new(color: Color)`](Style::new())
+///
+/// ### Setters
+///
+/// Set a style property on a given `Style` structure.
+///
+///   * [`style.fg(color: Color)`](Style::fg())
+///   * [`style.bg(color: Color)`](Style::bg())
+///   * [`style.mask()`](Style::mask())
+///   * [`style.wrap()`](Style::wrap())
+///   * [`style.bold()`](Style::bold())
+///   * [`style.dimmed()`](Style::dimmed())
+///   * [`style.italic()`](Style::italic())
+///   * [`style.underline()`](Style::underline())
+///   * [`style.blink()`](Style::blink())
+///   * [`style.invert()`](Style::invert())
+///   * [`style.hidden()`](Style::hidden())
+///   * [`style.strikethrough()`](Style::strikethrough())
+///
+/// These methods can be chained:
+///
+/// ```rust
+/// use yansi::{Style, Color::{Red, Magenta}};
+///
+/// Style::new(Red).bg(Magenta).underline().invert().italic().dimmed().bold();
+/// ```
+///
+/// ### Converters
+///
+/// Convert a `Style` into another structure.
+///
+///   * [`style.paint<T>(item: T) -> Paint<T>`](Style::paint())
+///
+/// ### Getters
+///
+/// Return information about a `Style` structure.
+///
+///   * [`style.fg_color()`](Style::fg_color())
+///   * [`style.bg_color()`](Style::bg_color())
+///   * [`style.is_masked()`](Style::is_masked())
+///   * [`style.is_wrapping()`](Style::is_wrapping())
+///   * [`style.is_bold()`](Style::is_bold())
+///   * [`style.is_dimmed()`](Style::is_dimmed())
+///   * [`style.is_italic()`](Style::is_italic())
+///   * [`style.is_underline()`](Style::is_underline())
+///   * [`style.is_blink()`](Style::is_blink())
+///   * [`style.is_invert()`](Style::is_invert())
+///   * [`style.is_hidden()`](Style::is_hidden())
+///   * [`style.is_strikethrough()`](Style::is_strikethrough())
+///
+/// ### Raw Formatters
+///
+/// Write the raw ANSI codes for a given `Style` to any `fmt::Write`.
+///
+///   * [`style.fmt_prefix(f: &mut fmt::Write)`](Style::fmt_prefix())
+///   * [`style.fmt_suffix(f: &mut fmt::Write)`](Style::fmt_suffix())
+#[repr(packed)]
+#[derive(Default, Debug, Eq, Ord, PartialOrd, Copy, Clone)]
+pub struct Style {
+    pub(crate) foreground: Color,
+    pub(crate) background: Color,
+    pub(crate) properties: Property,
+    pub(crate) masked: bool,
+    pub(crate) wrap: bool,
+}
+
+impl PartialEq for Style {
+    fn eq(&self, other: &Style) -> bool {
+        self.foreground == other.foreground
+            && self.background == other.background
+            && self.properties == other.properties
+    }
+}
+
+impl Hash for Style {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.foreground.hash(state);
+        self.background.hash(state);
+        self.properties.hash(state);
+    }
+}
+
+macro_rules! checker_for {
+    ($($name:ident ($fn_name:ident): $property:ident),*) => ($(
+        #[doc = concat!(
+            "Returns `true` if the _", stringify!($name), "_ property is set on `self`.\n",
+            "```rust\n",
+            "use yansi::Style;\n",
+            "\n",
+            "let plain = Style::default();\n",
+            "assert!(!plain.", stringify!($fn_name), "());\n",
+            "\n",
+            "let styled = plain.", stringify!($name), "();\n",
+            "assert!(styled.", stringify!($fn_name), "());\n",
+            "```\n"
+        )]
+        #[inline]
+        pub fn $fn_name(&self) -> bool {
+            self.properties.contains(Property::$property)
+        }
+    )*)
+}
+
+#[inline]
+fn write_spliced<T: Display>(c: &mut bool, f: &mut fmt::Write, t: T) -> fmt::Result {
+    if *c {
+        write!(f, ";{}", t)
+    } else {
+        *c = true;
+        write!(f, "{}", t)
+    }
+}
+
+impl Style {
+    /// Default style with the foreground set to `color` and no other set
+    /// properties.
+    ///
+    /// ```rust
+    /// use yansi::Style;
+    ///
+    /// let plain = Style::default();
+    /// assert_eq!(plain, Style::default());
+    /// ```
+    #[inline]
+    pub fn new(color: Color) -> Style {
+        Self::default().fg(color)
+    }
+
+    /// Sets the foreground to `color`.
+    ///
+    /// ```rust
+    /// use yansi::{Color, Style};
+    ///
+    /// let red_fg = Style::default().fg(Color::Red);
+    /// ```
+    #[inline]
+    pub fn fg(mut self, color: Color) -> Style {
+        self.foreground = color;
+        self
+    }
+
+    /// Sets the background to `color`.
+    ///
+    /// ```rust
+    /// use yansi::{Color, Style};
+    ///
+    /// let red_bg = Style::default().bg(Color::Red);
+    /// ```
+    #[inline]
+    pub fn bg(mut self, color: Color) -> Style {
+        self.background = color;
+        self
+    }
+
+    /// Sets `self` to be masked.
+    ///
+    /// An item with _masked_ styling is not written out when painting is
+    /// disabled during `Display` or `Debug` invocations. When painting is
+    /// enabled, masking has no effect.
+    ///
+    /// ```rust
+    /// use yansi::Style;
+    ///
+    /// let masked = Style::default().mask();
+    ///
+    /// // "Whoops! " will only print when coloring is enabled.
+    /// println!("{}Something happened.", masked.paint("Whoops! "));
+    /// ```
+    #[inline]
+    pub fn mask(mut self) -> Style {
+        self.masked = true;
+        self
+    }
+
+    /// Sets `self` to be wrapping.
+    ///
+    /// A wrapping `Style` converts all color resets written out by the internal
+    /// value to the styling of itself. This allows for seamless color wrapping
+    /// of other colored text.
+    ///
+    /// # Performance
+    ///
+    /// In order to wrap an internal value, the internal value must first be
+    /// written out to a local buffer and examined. As a result, displaying a
+    /// wrapped value is likely to result in a heap allocation and copy.
+    ///
+    /// ```rust
+    /// use yansi::{Paint, Style, Color};
+    ///
+    /// let inner = format!("{} and {}", Paint::red("Stop"), Paint::green("Go"));
+    /// let wrapping = Style::new(Color::Blue).wrap();
+    ///
+    /// // 'Hey!' will be unstyled, "Stop" will be red, "and" will be blue, and
+    /// // "Go" will be green. Without a wrapping `Paint`, "and" would be
+    /// // unstyled.
+    /// println!("Hey! {}", wrapping.paint(inner));
+    /// ```
+    #[inline]
+    pub fn wrap(mut self) -> Style {
+        self.wrap = true;
+        self
+    }
+
+    style_builder_for!(Style, |style| style.properties,
+                       bold: BOLD, dimmed: DIMMED, italic: ITALIC,
+                       underline: UNDERLINE, blink: BLINK, invert: INVERT,
+                       hidden: HIDDEN, strikethrough: STRIKETHROUGH);
+
+    /// Constructs a new `Paint` structure that encapsulates `item` with the
+    /// style set to `self`.
+    ///
+    /// ```rust
+    /// use yansi::{Style, Color};
+    ///
+    /// let alert = Style::new(Color::Red).bold().underline();
+    /// println!("Alert: {}", alert.paint("This thing happened!"));
+    /// ```
+    #[inline]
+    pub fn paint<T>(self, item: T) -> Paint<T> {
+        Paint::new(item).with_style(self)
+    }
+
+    /// Returns the foreground color of `self`.
+    ///
+    /// ```rust
+    /// use yansi::{Style, Color};
+    ///
+    /// let plain = Style::default();
+    /// assert_eq!(plain.fg_color(), Color::Unset);
+    ///
+    /// let red = plain.fg(Color::Red);
+    /// assert_eq!(red.fg_color(), Color::Red);
+    /// ```
+    #[inline]
+    pub fn fg_color(&self) -> Color {
+        self.foreground
+    }
+
+    /// Returns the foreground color of `self`.
+    ///
+    /// ```rust
+    /// use yansi::{Style, Color};
+    ///
+    /// let plain = Style::default();
+    /// assert_eq!(plain.bg_color(), Color::Unset);
+    ///
+    /// let white = plain.bg(Color::White);
+    /// assert_eq!(white.bg_color(), Color::White);
+    /// ```
+    #[inline]
+    pub fn bg_color(&self) -> Color {
+        self.background
+    }
+
+    /// Returns `true` if `self` is masked.
+    ///
+    /// ```rust
+    /// use yansi::Style;
+    ///
+    /// let plain = Style::default();
+    /// assert!(!plain.is_masked());
+    ///
+    /// let masked = plain.mask();
+    /// assert!(masked.is_masked());
+    /// ```
+    #[inline]
+    pub fn is_masked(&self) -> bool {
+        self.masked
+    }
+
+    /// Returns `true` if `self` is wrapping.
+    ///
+    /// ```rust
+    /// use yansi::Style;
+    ///
+    /// let plain = Style::default();
+    /// assert!(!plain.is_wrapping());
+    ///
+    /// let wrapping = plain.wrap();
+    /// assert!(wrapping.is_wrapping());
+    /// ```
+    #[inline]
+    pub fn is_wrapping(&self) -> bool {
+        self.wrap
+    }
+
+    checker_for!(bold (is_bold): BOLD, dimmed (is_dimmed): DIMMED,
+        italic (is_italic): ITALIC, underline (is_underline): UNDERLINE,
+        blink (is_blink): BLINK, invert (is_invert): INVERT,
+        hidden (is_hidden): HIDDEN,
+        strikethrough (is_strikethrough): STRIKETHROUGH);
+
+    #[inline(always)]
+    fn is_plain(&self) -> bool {
+        self == &Style::default()
+    }
+
+    /// Writes the ANSI code prefix for the currently set styles.
+    ///
+    /// This method is intended to be used inside of [`fmt::Display`] and
+    /// [`fmt::Debug`] implementations for custom or specialized use-cases. Most
+    /// users should use [`Paint`] for all painting needs.
+    ///
+    /// This method writes the ANSI code prefix irrespective of whether painting
+    /// is currently enabled or disabled. To write the prefix only if painting
+    /// is enabled, condition a call to this method on [`Paint::is_enabled()`].
+    ///
+    /// [`fmt::Display`]: fmt::Display
+    /// [`fmt::Debug`]: fmt::Debug
+    /// [`Paint`]: Paint
+    /// [`Paint::is_enabled()`]: Paint::is_enabled()
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use std::fmt;
+    /// use yansi::Style;
+    ///
+    /// struct CustomItem {
+    ///     item: u32,
+    ///     style: Style
+    /// }
+    ///
+    /// impl fmt::Display for CustomItem {
+    ///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    ///         self.style.fmt_prefix(f)?;
+    ///         write!(f, "number: {}", self.item)?;
+    ///         self.style.fmt_suffix(f)
+    ///     }
+    /// }
+    /// ```
+    pub fn fmt_prefix(&self, f: &mut fmt::Write) -> fmt::Result {
+        // A user may just want a code-free string when no styles are applied.
+        if self.is_plain() {
+            return Ok(());
+        }
+
+        let mut splice = false;
+        write!(f, "\x1B[")?;
+
+        for i in self.properties.iter() {
+            let k = if i >= 5 { i + 2 } else { i + 1 };
+            write_spliced(&mut splice, f, k)?;
+        }
+
+        if self.background != Color::Unset {
+            write_spliced(&mut splice, f, "4")?;
+            self.background.ascii_fmt(f)?;
+        }
+
+        if self.foreground != Color::Unset {
+            write_spliced(&mut splice, f, "3")?;
+            self.foreground.ascii_fmt(f)?;
+        }
+
+        // All the codes end with an `m`.
+        write!(f, "m")
+    }
+
+    /// Writes the ANSI code suffix for the currently set styles.
+    ///
+    /// This method is intended to be used inside of [`fmt::Display`] and
+    /// [`fmt::Debug`] implementations for custom or specialized use-cases. Most
+    /// users should use [`Paint`] for all painting needs.
+    ///
+    /// This method writes the ANSI code suffix irrespective of whether painting
+    /// is currently enabled or disabled. To write the suffix only if painting
+    /// is enabled, condition a call to this method on [`Paint::is_enabled()`].
+    ///
+    /// [`fmt::Display`]: fmt::Display
+    /// [`fmt::Debug`]: fmt::Debug
+    /// [`Paint`]: Paint
+    /// [`Paint::is_enabled()`]: Paint::is_enabled()
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use std::fmt;
+    /// use yansi::Style;
+    ///
+    /// struct CustomItem {
+    ///     item: u32,
+    ///     style: Style
+    /// }
+    ///
+    /// impl fmt::Display for CustomItem {
+    ///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    ///         self.style.fmt_prefix(f)?;
+    ///         write!(f, "number: {}", self.item)?;
+    ///         self.style.fmt_suffix(f)
+    ///     }
+    /// }
+    /// ```
+    pub fn fmt_suffix(&self, f: &mut fmt::Write) -> fmt::Result {
+        if self.is_plain() {
+            return Ok(());
+        }
+
+        write!(f, "\x1B[0m")
+    }
+}
diff --git a/vendor/yansi/src/tests.rs b/vendor/yansi/src/tests.rs
new file mode 100644
index 000000000..f3f678140
--- /dev/null
+++ b/vendor/yansi/src/tests.rs
@@ -0,0 +1,182 @@
+extern crate serial_test;
+
+use self::serial_test::serial;
+
+use super::Color::*;
+use super::{Paint, Style};
+
+macro_rules! assert_renders {
+    ($($input:expr => $expected:expr,)*) => {
+        $(
+            let (input, expected) = ($input.to_string(), $expected.to_string());
+            if input != expected {
+                panic!("expected {:?}, got {:?} from {:?} ({:?})",
+                       expected, input, $input.inner(), $input.style())
+            }
+        )*
+    };
+}
+
+macro_rules! assert_disabled_renders {
+    ($($input:expr => $expected:expr,)*) => {
+        $(
+            Paint::disable();
+            let (actual, expected) = ($input.to_string(), $expected.to_string());
+            Paint::enable();
+            assert_eq!(actual, expected);
+        )*
+    };
+}
+
+#[test]
+#[serial]
+fn colors_enabled() {
+    assert_renders! {
+        Paint::new("text/plain") => "text/plain",
+        Paint::red("hi") => "\x1B[31mhi\x1B[0m",
+        Paint::black("hi") => "\x1B[30mhi\x1B[0m",
+        Paint::yellow("hi").bold() => "\x1B[1;33mhi\x1B[0m",
+        Paint::new("hi").fg(Yellow).bold() => "\x1B[1;33mhi\x1B[0m",
+        Paint::blue("hi").underline() => "\x1B[4;34mhi\x1B[0m",
+        Paint::green("hi").bold().underline() => "\x1B[1;4;32mhi\x1B[0m",
+        Paint::green("hi").underline().bold() => "\x1B[1;4;32mhi\x1B[0m",
+        Paint::magenta("hi").bg(White) => "\x1B[47;35mhi\x1B[0m",
+        Paint::red("hi").bg(Blue).fg(Yellow) => "\x1B[44;33mhi\x1B[0m",
+        Paint::cyan("hi").bg(Blue).fg(Yellow) => "\x1B[44;33mhi\x1B[0m",
+        Paint::cyan("hi").bold().bg(White) => "\x1B[1;47;36mhi\x1B[0m",
+        Paint::cyan("hi").underline().bg(White) => "\x1B[4;47;36mhi\x1B[0m",
+        Paint::cyan("hi").bold().underline().bg(White) => "\x1B[1;4;47;36mhi\x1B[0m",
+        Paint::cyan("hi").underline().bold().bg(White) => "\x1B[1;4;47;36mhi\x1B[0m",
+        Paint::fixed(100, "hi") => "\x1B[38;5;100mhi\x1B[0m",
+        Paint::fixed(100, "hi").bg(Magenta) => "\x1B[45;38;5;100mhi\x1B[0m",
+        Paint::fixed(100, "hi").bg(Fixed(200)) => "\x1B[48;5;200;38;5;100mhi\x1B[0m",
+        Paint::rgb(70, 130, 180, "hi") => "\x1B[38;2;70;130;180mhi\x1B[0m",
+        Paint::rgb(70, 130, 180, "hi").bg(Blue) => "\x1B[44;38;2;70;130;180mhi\x1B[0m",
+        Paint::blue("hi").bg(RGB(70, 130, 180)) => "\x1B[48;2;70;130;180;34mhi\x1B[0m",
+        Paint::rgb(70, 130, 180, "hi").bg(RGB(5,10,15)) => "\x1B[48;2;5;10;15;38;2;70;130;180mhi\x1B[0m",
+        Paint::new("hi").bold() => "\x1B[1mhi\x1B[0m",
+        Paint::new("hi").underline() => "\x1B[4mhi\x1B[0m",
+        Paint::new("hi").bold().underline() => "\x1B[1;4mhi\x1B[0m",
+        Paint::new("hi").dimmed() => "\x1B[2mhi\x1B[0m",
+        Paint::new("hi").italic() => "\x1B[3mhi\x1B[0m",
+        Paint::new("hi").blink() => "\x1B[5mhi\x1B[0m",
+        Paint::new("hi").invert() => "\x1B[7mhi\x1B[0m",
+        Paint::new("hi").hidden() => "\x1B[8mhi\x1B[0m",
+        Paint::new("hi").strikethrough() => "\x1B[9mhi\x1B[0m",
+    }
+}
+
+#[test]
+#[serial]
+fn colors_disabled() {
+    assert_disabled_renders! {
+        Paint::new("text/plain") => "text/plain",
+        Paint::red("hi") => "hi",
+        Paint::black("hi") => "hi",
+        Paint::yellow("hi").bold() => "hi",
+        Paint::new("hi").fg(Yellow).bold() => "hi",
+        Paint::blue("hi").underline() => "hi",
+        Paint::green("hi").bold().underline() => "hi",
+        Paint::green("hi").underline().bold() => "hi",
+        Paint::magenta("hi").bg(White) => "hi",
+        Paint::red("hi").bg(Blue).fg(Yellow) => "hi",
+        Paint::cyan("hi").bg(Blue).fg(Yellow) => "hi",
+        Paint::cyan("hi").bold().bg(White) => "hi",
+        Paint::cyan("hi").underline().bg(White) => "hi",
+        Paint::cyan("hi").bold().underline().bg(White) => "hi",
+        Paint::cyan("hi").underline().bold().bg(White) => "hi",
+        Paint::fixed(100, "hi") => "hi",
+        Paint::fixed(100, "hi").bg(Magenta) => "hi",
+        Paint::fixed(100, "hi").bg(Fixed(200)) => "hi",
+        Paint::rgb(70, 130, 180, "hi") => "hi",
+        Paint::rgb(70, 130, 180, "hi").bg(Blue) => "hi",
+        Paint::blue("hi").bg(RGB(70, 130, 180)) => "hi",
+        Paint::blue("hi").bg(RGB(70, 130, 180)).wrap() => "hi",
+        Paint::rgb(70, 130, 180, "hi").bg(RGB(5,10,15)) => "hi",
+        Paint::new("hi").bold() => "hi",
+        Paint::new("hi").underline() => "hi",
+        Paint::new("hi").bold().underline() => "hi",
+        Paint::new("hi").dimmed() => "hi",
+        Paint::new("hi").italic() => "hi",
+        Paint::new("hi").blink() => "hi",
+        Paint::new("hi").invert() => "hi",
+        Paint::new("hi").hidden() => "hi",
+        Paint::new("hi").strikethrough() => "hi",
+        Paint::new("hi").strikethrough().wrap() => "hi",
+    }
+}
+
+#[test]
+#[serial]
+fn masked_when_disabled() {
+    assert_disabled_renders! {
+        Paint::masked("text/plain") => "",
+        Paint::masked("text/plain").mask() => "",
+        Paint::new("text/plain").mask() => "",
+        Paint::new("text/plain").mask() => "",
+        Paint::red("hi").mask() => "",
+        Paint::black("hi").mask() => "",
+        Paint::yellow("hi").bold().mask() => "",
+        Paint::cyan("hi").bg(Blue).fg(Yellow).mask() => "",
+        Paint::cyan("hi").underline().bold().bg(White).mask() => "",
+    }
+}
+
+#[test]
+#[serial]
+fn masked_when_enabled() {
+    assert_renders! {
+        Paint::masked("text/plain") => "text/plain",
+        Paint::masked("text/plain").mask() => "text/plain",
+        Paint::black("hi").mask() => "\x1B[30mhi\x1B[0m",
+        Paint::yellow("hi").bold().mask() => "\x1B[1;33mhi\x1B[0m",
+        Paint::new("hi").fg(Yellow).bold().mask() => "\x1B[1;33mhi\x1B[0m",
+        Paint::cyan("hi").underline().bg(White).mask() => "\x1B[4;47;36mhi\x1B[0m",
+        Paint::cyan("hi").bold().underline().bg(White).mask() => "\x1B[1;4;47;36mhi\x1B[0m",
+        Paint::rgb(70, 130, 180, "hi").mask() => "\x1B[38;2;70;130;180mhi\x1B[0m",
+        Paint::new("hi").underline().mask() => "\x1B[4mhi\x1B[0m",
+        Paint::new("hi").bold().underline().mask() => "\x1B[1;4mhi\x1B[0m",
+        Paint::new("hi").hidden().mask() => "\x1B[8mhi\x1B[0m",
+    }
+}
+
+#[test]
+#[serial]
+fn wrapping() {
+    let inner = || format!("{} b {}", Paint::red("a"), Paint::green("c"));
+    let inner2 = || format!("0 {} 1", Paint::magenta(&inner()).wrap());
+    assert_renders! {
+        Paint::new("text/plain").wrap() => "text/plain",
+        Paint::new(&inner()).wrap() => &inner(),
+        Paint::new(&inner()).wrap() =>
+            "\u{1b}[31ma\u{1b}[0m b \u{1b}[32mc\u{1b}[0m",
+        Paint::new(&inner()).fg(Blue).wrap() =>
+            "\u{1b}[34m\u{1b}[31ma\u{1b}[0m\u{1b}[34m b \
+            \u{1b}[32mc\u{1b}[0m\u{1b}[34m\u{1b}[0m",
+        Paint::new(&inner2()).wrap() => &inner2(),
+        Paint::new(&inner2()).wrap() =>
+            "0 \u{1b}[35m\u{1b}[31ma\u{1b}[0m\u{1b}[35m b \
+            \u{1b}[32mc\u{1b}[0m\u{1b}[35m\u{1b}[0m 1",
+        Paint::new(&inner2()).fg(Blue).wrap() =>
+            "\u{1b}[34m0 \u{1b}[35m\u{1b}[31ma\u{1b}[0m\u{1b}[34m\u{1b}[35m b \
+            \u{1b}[32mc\u{1b}[0m\u{1b}[34m\u{1b}[35m\u{1b}[0m\u{1b}[34m 1\u{1b}[0m",
+    }
+}
+
+#[test]
+fn hash_eq() {
+    use std::collections::hash_map::DefaultHasher;
+    use std::hash::{Hash, Hasher};
+
+    fn hash<T: Hash>(t: &T) -> u64 {
+        let mut s = DefaultHasher::new();
+        t.hash(&mut s);
+        s.finish()
+    }
+
+    let a = Style::default();
+    let b = Style::default().mask();
+
+    assert_eq!(a, b);
+    assert_eq!(hash(&a), hash(&b));
+}
diff --git a/vendor/yansi/src/windows.rs b/vendor/yansi/src/windows.rs
new file mode 100644
index 000000000..324cfc39a
--- /dev/null
+++ b/vendor/yansi/src/windows.rs
@@ -0,0 +1,69 @@
+#[cfg(windows)]
+mod windows_console {
+    use std::os::raw::c_void;
+
+    #[allow(non_camel_case_types)] type c_ulong = u32;
+    #[allow(non_camel_case_types)] type c_int = i32;
+    type DWORD = c_ulong;
+    type LPDWORD = *mut DWORD;
+    type HANDLE = *mut c_void;
+    type BOOL = c_int;
+
+    const ENABLE_VIRTUAL_TERMINAL_PROCESSING: DWORD = 0x0004;
+    const STD_OUTPUT_HANDLE: DWORD = 0xFFFFFFF5;
+    const STD_ERROR_HANDLE: DWORD = 0xFFFFFFF4;
+    const INVALID_HANDLE_VALUE: HANDLE = -1isize as HANDLE;
+    const FALSE: BOOL = 0;
+    const TRUE: BOOL = 1;
+
+    // This is the win32 console API, taken from the 'winapi' crate.
+    extern "system" {
+        fn GetStdHandle(nStdHandle: DWORD) -> HANDLE;
+        fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
+        fn SetConsoleMode(hConsoleHandle: HANDLE, dwMode: DWORD) -> BOOL;
+    }
+
+    unsafe fn get_handle(handle_num: DWORD) -> Result<HANDLE, ()> {
+        match GetStdHandle(handle_num) {
+            handle if handle == INVALID_HANDLE_VALUE => Err(()),
+            handle => Ok(handle)
+        }
+    }
+
+    unsafe fn enable_vt(handle: HANDLE) -> Result<(), ()> {
+        let mut dw_mode: DWORD = 0;
+        if GetConsoleMode(handle, &mut dw_mode) == FALSE {
+            return Err(());
+        }
+
+        dw_mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
+        match SetConsoleMode(handle, dw_mode) {
+            result if result == TRUE => Ok(()),
+            _ => Err(())
+        }
+    }
+
+    unsafe fn enable_ascii_colors_raw() -> Result<bool, ()> {
+        let stdout_handle = get_handle(STD_OUTPUT_HANDLE)?;
+        let stderr_handle = get_handle(STD_ERROR_HANDLE)?;
+
+        enable_vt(stdout_handle)?;
+        if stdout_handle != stderr_handle {
+            enable_vt(stderr_handle)?;
+        }
+
+        Ok(true)
+    }
+
+    #[inline]
+    pub fn enable_ascii_colors() -> bool {
+        unsafe { enable_ascii_colors_raw().unwrap_or(false) }
+    }
+}
+
+#[cfg(not(windows))]
+mod windows_console {
+    pub fn enable_ascii_colors() -> bool { true }
+}
+
+pub use self::windows_console::enable_ascii_colors;