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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /third_party/rust/version_check/src/channel.rs
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/version_check/src/channel.rs')
-rw-r--r--third_party/rust/version_check/src/channel.rs193
1 files changed, 193 insertions, 0 deletions
diff --git a/third_party/rust/version_check/src/channel.rs b/third_party/rust/version_check/src/channel.rs
new file mode 100644
index 0000000000..f84c508d16
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+++ b/third_party/rust/version_check/src/channel.rs
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+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<Channel> {
+ ::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<Channel> {
+ 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())
+ }
+}