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.
38    ///
39    /// # Errors
40    ///
41    /// Returns an error if any component of `s` fails to parse as a [`u64`].
42    pub fn parse(s: &str) -> anyhow::Result<Self> {
43        let mut parts = s.split('.').map(str::parse::<u64>);
44        let major = parts.next().unwrap_or(Ok(0))?;
45        let minor = parts.next().unwrap_or(Ok(0))?;
46        let patch = parts.next().unwrap_or(Ok(0))?;
47        Ok(Self {
48            major,
49            minor,
50            patch,
51        })
52    }
53}
54
55impl Display for SemVer {
56    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
57        write!(f, "{}.{}.{}", self.major, self.minor, self.patch)
58    }
59}
60
61#[cfg(test)]
62mod tests {
63    use rstest::rstest;
64
65    use super::*;
66
67    #[rstest]
68    #[case("6.2.0", 6, 2, 0)]
69    #[case("7.0.15", 7, 0, 15)]
70    #[case("0.0.1", 0, 0, 1)]
71    #[case("1", 1, 0, 0)]
72    #[case("2.5", 2, 5, 0)]
73    fn test_semver_parse(
74        #[case] input: &str,
75        #[case] major: u64,
76        #[case] minor: u64,
77        #[case] patch: u64,
78    ) {
79        let v = SemVer::parse(input).unwrap();
80        assert_eq!(v.major, major);
81        assert_eq!(v.minor, minor);
82        assert_eq!(v.patch, patch);
83    }
84
85    #[rstest]
86    fn test_semver_display() {
87        let v = SemVer::parse("7.2.4").unwrap();
88        assert_eq!(v.to_string(), "7.2.4");
89    }
90
91    #[rstest]
92    fn test_semver_ordering() {
93        let v620 = SemVer::parse("6.2.0").unwrap();
94        let v700 = SemVer::parse("7.0.0").unwrap();
95        let v621 = SemVer::parse("6.2.1").unwrap();
96        let v630 = SemVer::parse("6.3.0").unwrap();
97
98        assert!(v700 > v620);
99        assert!(v621 > v620);
100        assert!(v630 > v621);
101        assert!(v700 >= v620);
102        assert!(v620 >= v620);
103    }
104
105    #[rstest]
106    fn test_semver_parse_invalid() {
107        assert!(SemVer::parse("abc").is_err());
108    }
109}
nautilus_core/string/semver.rs

nautilus_core/string/
semver.rs
