mirror of https://github.com/Llewellynvdm/exa.git
58 lines
1.5 KiB
Rust
58 lines
1.5 KiB
Rust
//! Printing the version string.
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//!
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//! The code that works out which string to print is done in `build.rs`.
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use std::fmt;
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use crate::options::flags;
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use crate::options::parser::MatchedFlags;
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#[derive(PartialEq, Debug, Copy, Clone)]
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pub struct VersionString;
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// There were options here once, but there aren’t anymore!
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impl VersionString {
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/// Determines how to show the version, if at all, based on the user’s
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/// command-line arguments. This one works backwards from the other
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/// ‘deduce’ functions, returning Err if help needs to be shown.
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///
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/// Like --help, this doesn’t check for errors.
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pub fn deduce(matches: &MatchedFlags<'_>) -> Option<Self> {
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if matches.count(&flags::VERSION) > 0 {
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Some(Self)
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}
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else {
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None
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}
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}
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}
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impl fmt::Display for VersionString {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
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write!(f, "{}", include_str!(concat!(env!("OUT_DIR"), "/version_string.txt")))
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}
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}
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#[cfg(test)]
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mod test {
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use crate::options::{Options, OptionsResult};
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use std::ffi::OsStr;
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#[test]
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fn version() {
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let args = vec![ OsStr::new("--version") ];
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let opts = Options::parse(args, &None);
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assert!(matches!(opts, OptionsResult::Version(_)));
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}
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#[test]
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fn version_with_file() {
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let args = vec![ OsStr::new("--version"), OsStr::new("me") ];
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let opts = Options::parse(args, &None);
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assert!(matches!(opts, OptionsResult::Version(_)));
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}
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}
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