From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/version_check/src/channel.rs | 193 ++++++++++++++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 vendor/version_check/src/channel.rs (limited to 'vendor/version_check/src/channel.rs') diff --git a/vendor/version_check/src/channel.rs b/vendor/version_check/src/channel.rs new file mode 100644 index 000000000..f84c508d1 --- /dev/null +++ b/vendor/version_check/src/channel.rs @@ -0,0 +1,193 @@ +use std::fmt; + +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +enum Kind { + Dev, + Nightly, + Beta, + Stable, +} + +/// Release channel: "dev", "nightly", "beta", or "stable". +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +pub struct Channel(Kind); + +impl Channel { + /// Reads the release channel of the running compiler. If it cannot be + /// determined (see the [top-level documentation](crate)), returns `None`. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// match Channel::read() { + /// Some(c) => format!("The channel is: {}", c), + /// None => format!("Failed to read the release channel.") + /// }; + /// ``` + pub fn read() -> Option { + ::get_version_and_date() + .and_then(|(version, _)| version) + .and_then(|version| Channel::parse(&version)) + } + + /// Parse a Rust release channel from a Rust release version string (of the + /// form `major[.minor[.patch[-channel]]]`). Returns `None` if `version` is + /// not a valid Rust version string. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// let dev = Channel::parse("1.3.0-dev").unwrap(); + /// assert!(dev.is_dev()); + /// + /// let nightly = Channel::parse("1.42.2-nightly").unwrap(); + /// assert!(nightly.is_nightly()); + /// + /// let beta = Channel::parse("1.32.0-beta").unwrap(); + /// assert!(beta.is_beta()); + /// + /// let stable = Channel::parse("1.4.0").unwrap(); + /// assert!(stable.is_stable()); + /// ``` + pub fn parse(version: &str) -> Option { + let version = version.trim(); + if version.contains("-dev") || version == "dev" { + Some(Channel(Kind::Dev)) + } else if version.contains("-nightly") || version == "nightly" { + Some(Channel(Kind::Nightly)) + } else if version.contains("-beta") || version == "beta" { + Some(Channel(Kind::Beta)) + } else if !version.contains("-") { + Some(Channel(Kind::Stable)) + } else { + None + } + } + + /// Returns the name of the release channel. + fn as_str(&self) -> &'static str { + match self.0 { + Kind::Dev => "dev", + Kind::Beta => "beta", + Kind::Nightly => "nightly", + Kind::Stable => "stable", + } + } + + /// Returns `true` if this channel supports feature flags. In other words, + /// returns `true` if the channel is either `dev` or `nightly`. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// let dev = Channel::parse("1.3.0-dev").unwrap(); + /// assert!(dev.supports_features()); + /// + /// let nightly = Channel::parse("1.42.2-nightly").unwrap(); + /// assert!(nightly.supports_features()); + /// + /// let beta = Channel::parse("1.32.0-beta").unwrap(); + /// assert!(!beta.supports_features()); + /// + /// let stable = Channel::parse("1.4.0").unwrap(); + /// assert!(!stable.supports_features()); + /// ``` + pub fn supports_features(&self) -> bool { + match self.0 { + Kind::Dev | Kind::Nightly => true, + Kind::Beta | Kind::Stable => false + } + } + + /// Returns `true` if this channel is `dev` and `false` otherwise. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// let dev = Channel::parse("1.3.0-dev").unwrap(); + /// assert!(dev.is_dev()); + /// + /// let stable = Channel::parse("1.0.0").unwrap(); + /// assert!(!stable.is_dev()); + /// ``` + pub fn is_dev(&self) -> bool { + match self.0 { + Kind::Dev => true, + _ => false + } + } + + /// Returns `true` if this channel is `nightly` and `false` otherwise. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// let nightly = Channel::parse("1.3.0-nightly").unwrap(); + /// assert!(nightly.is_nightly()); + /// + /// let stable = Channel::parse("1.0.0").unwrap(); + /// assert!(!stable.is_nightly()); + /// ``` + pub fn is_nightly(&self) -> bool { + match self.0 { + Kind::Nightly => true, + _ => false + } + } + + /// Returns `true` if this channel is `beta` and `false` otherwise. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// let beta = Channel::parse("1.3.0-beta").unwrap(); + /// assert!(beta.is_beta()); + /// + /// let stable = Channel::parse("1.0.0").unwrap(); + /// assert!(!stable.is_beta()); + /// ``` + pub fn is_beta(&self) -> bool { + match self.0 { + Kind::Beta => true, + _ => false + } + } + + /// Returns `true` if this channel is `stable` and `false` otherwise. + /// + /// # Example + /// + /// ```rust + /// use version_check::Channel; + /// + /// let stable = Channel::parse("1.0.0").unwrap(); + /// assert!(stable.is_stable()); + /// + /// let beta = Channel::parse("1.3.0-beta").unwrap(); + /// assert!(!beta.is_stable()); + /// ``` + pub fn is_stable(&self) -> bool { + match self.0 { + Kind::Stable => true, + _ => false + } + } +} + +impl fmt::Display for Channel { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{}", self.as_str()) + } +} -- cgit v1.2.3