fix(color): disable when color feature missing

This commit fixes the added color customization code so that it's
properly disabled if the color feature is missing.

It also updates the debug macro to use the updated signature for
Colorizer::new.

Signed-off-by: Alecto Irene Perez <perez.cs@pm.me>

src/build/app/mod.rs

@@ -5,7 +5,13 @@ mod settings;
 mod tests;
 
 pub use self::settings::{AppFlags, AppSettings};
+
+#[cfg(feature = "color")]
 use termcolor::Color;
+#[cfg(feature = "color")]
+use termcolor::ColorSpec;
+#[cfg(feature = "color")]
+use crate::output::fmt::Style;
 
 // Std
 use std::{
@@ -28,7 +34,6 @@ use crate::build::{arg::ArgProvider, Arg, ArgGroup, ArgPredicate, ArgSettings};
 use crate::error::ErrorKind;
 use crate::error::Result as ClapResult;
 use crate::mkeymap::MKeyMap;
-use crate::output::fmt::Style;
 use crate::output::{fmt::Colorizer, fmt::StyleSpec, Help, HelpWriter, Usage};
 use crate::parse::{ArgMatcher, ArgMatches, Input, Parser};
 use crate::util::{color::ColorChoice, Id, Key};
@@ -1335,17 +1340,20 @@ impl<'help> App<'help> {
  ///
  /// ```no_run
  ///
- /// # use clap::{App, Style};
+ /// # use clap::{App, Style, Color, ColorSpec};
  ///
- /// // Do stuff to color
+ /// let mut color = ColorSpec::new();
+ /// 
+ /// color.set_fg(Some(Color::Green)).set_bold(true);
+ /// 
  /// App::new("myprog")
  /// .style(Style::Good, color)
  /// .get_matches();
  /// ```
  #[cfg(feature = "color")]
  #[inline]
  #[must_use]
- pub fn style(mut self, style: Style, spec: termcolor::ColorSpec) -> Self {
+ pub fn style(mut self, style: Style, spec: ColorSpec) -> Self {
  self.output_style.set_style(style, spec);
  self
  }
@@ -1473,11 +1481,11 @@ impl<'help> App<'help> {
  ///
  /// ```no_run
  ///
- /// # use clap::{App, Style};
+ /// # use clap::{App, Style, Color};
  ///
  /// // Do stuff to color
  /// App::new("myprog")
- /// .style_color(Style::Good, Some(Color::Green))
+ /// .foreground(Style::Good, Some(Color::Green))
  /// .get_matches();
  /// ```
  #[cfg(feature = "color")]
@@ -1496,11 +1504,11 @@ impl<'help> App<'help> {
  ///
  /// ```no_run
  ///
- /// # use clap::{App, Style};
+ /// # use clap::{App, Style, Color};
  ///
  /// // Do stuff to color
  /// App::new("myprog")
- /// .style_color(Style::Good, Some(Color::Green))
+ /// .background(Style::Good, Some(Color::Green))
  /// .get_matches();
  /// ```
  #[cfg(feature = "color")]

src/error/mod.rs

@@ -519,7 +519,7 @@ impl Error {
  val,
  err,
  ColorChoice::Never,
- StyleSpec::empty(),
+ StyleSpec::new(),
  false,
  );
  match &mut err.inner.message {
@@ -662,7 +662,7 @@ impl Error {
  }
 
  pub(crate) fn argument_not_found_auto(arg: String) -> Self {
- let mut c = Colorizer::new(true, ColorChoice::Never, StyleSpec::empty());
+ let mut c = Colorizer::new(true, ColorChoice::Never, StyleSpec::new());
 
  start_error(&mut c, "The argument '");
  c.warning(&*arg);
@@ -764,7 +764,7 @@ impl Message {
  fn formatted(&self) -> Cow<Colorizer> {
  match self {
  Message::Raw(s) => {
- let mut c = Colorizer::new(true, ColorChoice::Never, StyleSpec::empty());
+ let mut c = Colorizer::new(true, ColorChoice::Never, StyleSpec::new());
  start_error(&mut c, s);
  Cow::Owned(c)
  }

src/macros.rs

@@ -894,7 +894,10 @@ macro_rules! debug {
  ($($arg:tt)*) => ({
  let prefix = format!("[{:>w$}] \t", module_path!(), w = 28);
  let body = format!($($arg)*);
- let mut color = $crate::output::fmt::Colorizer::new(true, $crate::ColorChoice::Auto);
+ let mut color = $crate::output::fmt::Colorizer::new(
+ true,
+ $crate::ColorChoice::Auto,
+ $crate::output::fmt::StyleSpec::default());
  color.hint(prefix);
  color.hint(body);
  color.none("\n");

src/output/fmt.rs

@@ -1,30 +1,50 @@
 use crate::util::color::ColorChoice;
 
+#[cfg(feature = "color")]
+use termcolor::{Color, ColorSpec};
+
 use std::{
  fmt::{self, Display, Formatter},
  io::{self, Write},
 };
 
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub(crate) struct StyleSpec {
- pub good_style: termcolor::ColorSpec,
- pub warning_style: termcolor::ColorSpec,
- pub error_style: termcolor::ColorSpec,
- pub hint_style: termcolor::ColorSpec,
- pub default_style: termcolor::ColorSpec,
+ #[cfg(feature = "color")]
+ pub good_style: ColorSpec,
+
+ #[cfg(feature = "color")]
+ pub warning_style: ColorSpec,
+
+ #[cfg(feature = "color")]
+ pub error_style: ColorSpec,
+
+ #[cfg(feature = "color")]
+ pub hint_style: ColorSpec,
+
+ #[cfg(feature = "color")]
+ pub default_style: ColorSpec,
 }
 
 impl StyleSpec {
- pub(crate) fn empty() -> StyleSpec {
+ #[cfg(not(feature = "color"))]
+ pub(crate) fn new() -> StyleSpec {
+ StyleSpec {}
+ }
+
+ #[cfg(feature = "color")]
+ pub(crate) fn new() -> StyleSpec {
  StyleSpec {
- good_style: termcolor::ColorSpec::new(),
- warning_style: termcolor::ColorSpec::new(),
- error_style: termcolor::ColorSpec::new(),
- hint_style: termcolor::ColorSpec::new(),
- default_style: termcolor::ColorSpec::new(),
+ good_style: ColorSpec::new(),
+ warning_style: ColorSpec::new(),
+ error_style: ColorSpec::new(),
+ hint_style: ColorSpec::new(),
+ default_style: ColorSpec::new(),
  }
  }
- pub(crate) fn get_style(&self, style: Style) -> &termcolor::ColorSpec {
+
+ #[cfg(feature = "color")]
+ pub(crate) fn get_style(&self, style: Style) -> &ColorSpec {
  match style {
  Style::Good => &self.good_style,
  Style::Warning => &self.warning_style,
@@ -33,7 +53,9 @@ impl StyleSpec {
  Style::Default => &self.default_style,
  }
  }
- pub(crate) fn set_style(&mut self, style: Style, spec: termcolor::ColorSpec) -> &mut Self {
+
+ #[cfg(feature = "color")]
+ pub(crate) fn set_style(&mut self, style: Style, spec: ColorSpec) -> &mut Self {
  match style {
  Style::Good => self.good_style = spec,
  Style::Warning => self.warning_style = spec,
@@ -43,7 +65,9 @@ impl StyleSpec {
  }
  self
  }
- pub(crate) fn style(&mut self, style: Style) -> &mut termcolor::ColorSpec {
+
+ #[cfg(feature = "color")]
+ pub(crate) fn style(&mut self, style: Style) -> &mut ColorSpec {
  match style {
  Style::Good => &mut self.good_style,
  Style::Warning => &mut self.warning_style,
@@ -55,8 +79,13 @@ impl StyleSpec {
 }
 
 impl Default for StyleSpec {
+ #[cfg(not(feature = "color"))]
+ fn default() -> StyleSpec {
+ StyleSpec {}
+ }
+
+ #[cfg(feature = "color")]
  fn default() -> StyleSpec {
- use termcolor::{Color, ColorSpec};
  // Declare the styles
  let mut good_style = ColorSpec::new();
  let mut warning_style = ColorSpec::new();
@@ -86,12 +115,16 @@ pub(crate) struct Colorizer {
  #[allow(unused)]
  color_when: ColorChoice,
  pieces: Vec<(String, Style)>,
+
+ // If color is not enabled, then style_spec is never used
+ #[allow(dead_code)]
  style_spec: StyleSpec,
 }
 
 impl Colorizer {
  /// Get the `ColorSpec` used for a particular style
- pub(crate) fn spec_for(&self, style: Style) -> &termcolor::ColorSpec {
+ #[cfg(feature = "color")]
+ pub(crate) fn spec_for(&self, style: Style) -> &ColorSpec {
  self.style_spec.get_style(style)
  }