nautilus_core/string/
semver.rs

1// -------------------------------------------------------------------------------------------------
2//  Copyright (C) 2015-2026 Nautech Systems Pty Ltd. All rights reserved.
3//  https://nautechsystems.io
4//
5//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
6//  You may not use this file except in compliance with the License.
7//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
8//
9//  Unless required by applicable law or agreed to in writing, software
10//  distributed under the License is distributed on an "AS IS" BASIS,
11//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//  See the License for the specific language governing permissions and
13//  limitations under the License.
14// -------------------------------------------------------------------------------------------------
15
16//! Semantic version parsing and comparison.
17
18use std::fmt::Display;
19
20/// Parsed semantic version with major, minor, and patch components.
21///
22/// Supports parsing `"X.Y.Z"` strings and lexicographic comparison
23/// (major, then minor, then patch).
24#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
25pub struct SemVer {
26    /// Major version number.
27    pub major: u64,
28    /// Minor version number.
29    pub minor: u64,
30    /// Patch version number.
31    pub patch: u64,
32}
33
34impl SemVer {
35    /// Parses a `"major.minor.patch"` string into a [`SemVer`].
36    ///
37    /// Missing components default to zero; components beyond patch are ignored.
38    ///
39    /// # Errors
40    ///
41    /// Returns an error if any of the first three components of `s` fails to parse
42    /// as a [`u64`].
43    pub fn parse(s: &str) -> anyhow::Result<Self> {
44        let mut parts = s.split('.').map(str::parse::<u64>);
45        let major = parts.next().unwrap_or(Ok(0))?;
46        let minor = parts.next().unwrap_or(Ok(0))?;
47        let patch = parts.next().unwrap_or(Ok(0))?;
48        Ok(Self {
49            major,
50            minor,
51            patch,
52        })
53    }
54}
55
56impl Display for SemVer {
57    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
58        write!(f, "{}.{}.{}", self.major, self.minor, self.patch)
59    }
60}
61
62#[cfg(test)]
63mod tests {
64    use rstest::rstest;
65
66    use super::*;
67
68    #[rstest]
69    #[case("6.2.0", 6, 2, 0)]
70    #[case("7.0.15", 7, 0, 15)]
71    #[case("0.0.1", 0, 0, 1)]
72    #[case("1", 1, 0, 0)]
73    #[case("2.5", 2, 5, 0)]
74    fn test_semver_parse(
75        #[case] input: &str,
76        #[case] major: u64,
77        #[case] minor: u64,
78        #[case] patch: u64,
79    ) {
80        let v = SemVer::parse(input).unwrap();
81        assert_eq!(v.major, major);
82        assert_eq!(v.minor, minor);
83        assert_eq!(v.patch, patch);
84    }
85
86    #[rstest]
87    fn test_semver_display() {
88        let v = SemVer::parse("7.2.4").unwrap();
89        assert_eq!(v.to_string(), "7.2.4");
90    }
91
92    #[rstest]
93    fn test_semver_ordering() {
94        let v620 = SemVer::parse("6.2.0").unwrap();
95        let v700 = SemVer::parse("7.0.0").unwrap();
96        let v621 = SemVer::parse("6.2.1").unwrap();
97        let v630 = SemVer::parse("6.3.0").unwrap();
98
99        assert!(v700 > v620);
100        assert!(v621 > v620);
101        assert!(v630 > v621);
102        assert!(v700 >= v620);
103        assert!(v620 >= v620);
104    }
105
106    #[rstest]
107    fn test_semver_parse_invalid() {
108        assert!(SemVer::parse("abc").is_err());
109    }
110}
nautilus_core/string/semver.rs

nautilus_core/string/
semver.rs
