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
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141

//! Version types used by RustSec.
//!
//! These are newtypes of the `semver` crate with slightly different behavior
//! around the handling of prerelease versions.
//!
//! See: <https://github.com/RustSec/cargo-audit/issues/30>

mod predicate;
mod req;

pub use self::req::VersionReq;

use crate::Error;
use serde::{Deserialize, Serialize};
use std::{fmt, str::FromStr};

/// Version type
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, PartialOrd, Ord, Serialize)]
pub struct Version(semver::Version);

impl Version {
    /// Parse a version from a string
    pub fn parse(input: &str) -> Result<Self, Error> {
        Ok(semver::Version::parse(input)?.into())
    }

    /// Get the major part of the version
    pub fn major(&self) -> u64 {
        self.0.major
    }

    /// Get the minor part of the version
    pub fn minor(&self) -> u64 {
        self.0.minor
    }

    /// Get the patch part of the version
    pub fn patch(&self) -> u64 {
        self.0.patch
    }

    /// Get the prerelease portion of the version as a `String` if it exists
    pub fn pre(&self) -> Option<String> {
        if self.is_prerelease() {
            let pre_identifiers: Vec<_> = self.0.pre.iter().map(|id| id.to_string()).collect();
            Some(pre_identifiers.join("."))
        } else {
            None
        }
    }

    /// Is this version a prerelease?
    pub fn is_prerelease(&self) -> bool {
        self.0.is_prerelease()
    }
}

impl FromStr for Version {
    type Err = Error;

    fn from_str(s: &str) -> Result<Self, Error> {
        Self::parse(s)
    }
}

impl fmt::Display for Version {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", &self.0)
    }
}

impl From<semver::Version> for Version {
    fn from(version: semver::Version) -> Version {
        Version(version)
    }
}

impl From<Version> for semver::Version {
    fn from(version: Version) -> semver::Version {
        version.0
    }
}

#[cfg(test)]
mod tests {
    use super::{Version, VersionReq};

    fn version(s: &str) -> Version {
        Version::parse(s).unwrap()
    }

    fn version_req(s: &str) -> VersionReq {
        VersionReq::parse(s).unwrap()
    }

    #[test]
    fn version_parsing() {
        let v = version("1.2.3");
        assert_eq!(v.major(), 1);
        assert_eq!(v.minor(), 2);
        assert_eq!(v.patch(), 3);
        assert!(v.pre().is_none());
    }

    #[test]
    fn prerelease_version_parsing() {
        let pre_v = version("1.2.3-pre.4");
        assert_eq!(pre_v.major(), 1);
        assert_eq!(pre_v.minor(), 2);
        assert_eq!(pre_v.patch(), 3);
        assert_eq!(pre_v.pre().unwrap(), "pre.4");
    }

    #[test]
    fn basic_version_comparisons() {
        assert_eq!(version("0.0.0"), version("0.0.0"));
        assert!(version("0.0.0") < version("0.0.1"));
        assert!(version("1.0.0") > version("0.0.1"));
    }

    #[test]
    fn basic_version_req_matches() {
        assert!(version_req("= 0.0.0").matches(&version("0.0.0")));
        assert!(version_req("> 0.0.0").matches(&version("0.0.1")));
        assert!(version_req("< 1.0.0").matches(&version("0.0.1")));
        assert!(!version_req("> 1.0.0").matches(&version("1.0.0")));
    }

    // Test case from: <https://github.com/RustSec/cargo-audit/issues/30>
    #[test]
    fn prerelease_version_req_matches() {
        assert!(version_req(">= 0.7.6").matches(&version("0.11.0-dev")));
        assert!(!version_req("< 0.7.6").matches(&version("0.11.0-dev")));
    }

    #[test]
    fn release_is_greater_than_prerelease() {
        assert!(version_req("> 1.0.0-pre").matches(&version("1.0.0")));
        assert!(version_req("< 1.0.0").matches(&version("1.0.0-pre")))
    }
}