1use std::{
 2    fmt::{self, Display},
 3    str::FromStr,
 4};
 5
 6use anyhow::{anyhow, Result};
 7use serde::Serialize;
 8
 9/// A datastructure representing a semantic version number
10#[derive(Clone, Copy, Debug, Default, Eq, Ord, PartialEq, PartialOrd, Serialize)]
11pub struct SemanticVersion {
12    pub major: usize,
13    pub minor: usize,
14    pub patch: usize,
15}
16
17impl FromStr for SemanticVersion {
18    type Err = anyhow::Error;
19
20    fn from_str(s: &str) -> Result<Self> {
21        let mut components = s.trim().split('.');
22        let major = components
23            .next()
24            .ok_or_else(|| anyhow!("missing major version number"))?
25            .parse()?;
26        let minor = components
27            .next()
28            .ok_or_else(|| anyhow!("missing minor version number"))?
29            .parse()?;
30        let patch = components
31            .next()
32            .ok_or_else(|| anyhow!("missing patch version number"))?
33            .parse()?;
34        Ok(Self {
35            major,
36            minor,
37            patch,
38        })
39    }
40}
41
42impl Display for SemanticVersion {
43    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
44        write!(f, "{}.{}.{}", self.major, self.minor, self.patch)
45    }
46}