clyde 0.6.0

A cross-platform package manager for prebuilt applications
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

// SPDX-FileCopyrightText: 2022 Aurélien Gâteau <mail@agateau.com>
//
// SPDX-License-Identifier: GPL-3.0-or-later

use anyhow::{anyhow, Result};
use regex::Regex;
use semver::Version;

lazy_static! {
    static ref VERSION_RX: Regex = Regex::new("([0-9]+(\\.[0-9]+)*)$").unwrap();
}

fn count_chars(txt: &str, wanted: char) -> usize {
    txt.chars().filter(|&x| x == wanted).count()
}

/// Extract a version from a tag
pub fn version_from_tag(tag: &str) -> Result<Version> {
    // Keep only the version suffix
    let version_str = VERSION_RX
        .captures(tag)
        .map(|captures| captures[0].to_string());

    let mut version_str = match version_str {
        Some(x) => x.to_string(),
        None => {
            return Err(anyhow!("Can't find version number in '{}'", tag));
        }
    };

    // Make sure the version has 3 components
    while count_chars(&version_str, '.') < 2 {
        version_str.push_str(".0");
    }

    let version = Version::parse(&version_str)?;
    Ok(version)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn check_version_from_tag_removes_prefixes() {
        assert_eq!(version_from_tag("v1.12.0").unwrap(), Version::new(1, 12, 0));
        assert_eq!(
            version_from_tag("foo14-1.12.0").unwrap(),
            Version::new(1, 12, 0)
        );
    }

    #[test]
    fn check_version_from_tag_add_missing_components() {
        assert_eq!(version_from_tag("1").unwrap(), Version::new(1, 0, 0));
        assert_eq!(version_from_tag("1.12").unwrap(), Version::new(1, 12, 0));
    }

    #[test]
    fn check_version_from_tag_fails() {
        assert!(version_from_tag("foo").is_err());
    }
}