55 lines
2.3 KiB
Rust
55 lines
2.3 KiB
Rust
use cfg_if::cfg_if;
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use once_cell::sync::OnceCell;
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use crate::String;
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/// The current version of fif, as defined in Cargo.toml.
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pub const VERSION: Option<&'static str> = option_env!("CARGO_PKG_VERSION");
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cfg_if! {
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if #[cfg(any(all(unix, feature = "infer-backend"), all(not(unix), not(feature = "xdg-mime-backend"))))] {
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/// The backend being used; either "Infer" or "XDG-Mime".
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pub const BACKEND: &str = "Infer";
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} else {
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/// The backend being used; either "Infer" or "XDG-Mime".
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pub const BACKEND: &str = "XDG-Mime";
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}
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}
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// the version and long_version given to clap need to be a &str, but we want to use format!, which returns a String.
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// we can't just do something like `version = format!(...).as_str()`, because clap needs to know that the version will
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// live for a given lifetime, which we need to satisfy by making our String static. of course, you can't use format!
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// statically, so we need to use a OnceCell or similar to get around this.
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static CLAP_VERSION: OnceCell<String> = OnceCell::new();
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static CLAP_LONG_VERSION: OnceCell<String> = OnceCell::new();
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/// Sets [`CLAP_VERSION`] to be the version defined in Cargo.toml, prefixed with a v (e.g. "v0.3.1"), then returns it as
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/// a String.
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pub fn clap_version() -> &'static str { CLAP_VERSION.get_or_init(|| String::from("v") + VERSION.unwrap_or("???")) }
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/// Sets [`CLAP_LONG_VERSION`] to be similar to [`CLAP_VERSION`], followed by the chosen backend in parentheses (e.g.
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/// "v0.3.1 (XDG-Mime backend)"), then returns it as a String.
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pub fn clap_long_version() -> &'static str {
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CLAP_LONG_VERSION.get_or_init(|| format!("v{} ({} backend)", VERSION.unwrap_or("???"), BACKEND).into())
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}
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/// Returns the name of the target operating system with proper casing, like "Windows" or "macOS".
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#[allow(clippy::option_map_unit_fn)]
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pub fn os_name() -> String {
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match std::env::consts::OS {
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// special cases: "ios" should not be capitalised into "Ios", for example
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"ios" => "iOS".into(),
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"macos" => "macOS".into(),
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"freebsd" => "FreeBSD".into(),
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"openbsd" => "OpenBSD".into(),
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"netbsd" => "NetBSD".into(),
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"vxworks" => "VxWorks".into(),
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os => {
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// generic case: return consts::OS with the first letter in uppercase ("linux" -> "Linux")
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let mut os_upper = String::from(os);
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os_upper.get_mut(0..1).map(|first| first.make_ascii_uppercase());
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os_upper
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}
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}
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}
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