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/// Choice for colorizing output.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
pub enum ColorChoice {
/// Automatically detect whether colors should be used based on TTY detection.
#[default]
Auto,
/// Always use colors, regardless of TTY status.
Always,
/// Never use colors.
Never,
}
impl ColorChoice {
/// Determine if colors should be used based on this choice and whether output is a TTY.
///
/// # Arguments
///
/// * `is_tty` - Whether the output stream is connected to a terminal
///
/// # Returns
///
/// `true` if colors should be used, `false` otherwise
#[must_use]
pub fn should_use_colors(self, is_tty: bool) -> bool {
// Respect FORCE_COLOR environment variable (https://no-color.org/)
// If FORCE_COLOR exists and is not "0", force colors
if std::env::var_os("FORCE_COLOR").is_some_and(|value| value != "0") {
return true;
}
// Respect NO_COLOR environment variable (https://no-color.org/)
// If NO_COLOR exists and is not "0", disable colors
if std::env::var_os("NO_COLOR").is_some_and(|value| value != "0") {
return false;
}
match self {
ColorChoice::Auto => is_tty,
ColorChoice::Always => true,
ColorChoice::Never => false,
}
}
}