Added forgotten file, fixed CI.

src/p2p/version.rs

@@ -0,0 +1,59 @@
+use std::fmt;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Version {
+    pub major: u16,
+    pub minor: u16,
+    pub patch: u16,
+}
+
+impl Version {
+    pub fn parse(s: &str) -> Version {
+        let parts: Vec<&str> = s.split('.').collect();
+        Version {
+            major: parts.get(0).and_then(|s| s.parse().ok()).unwrap_or(0),
+            minor: parts.get(1).and_then(|s| s.parse().ok()).unwrap_or(0),
+            patch: parts.get(2).and_then(|s| s.parse().ok()).unwrap_or(0),
+        }
+    }
+}
+
+impl Default for Version {
+    fn default() -> Self {
+        Version { major: 0, minor: 0, patch: 0 }
+    }
+}
+
+impl PartialOrd for Version {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for Version {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        self.major.cmp(&other.major)
+            .then(self.minor.cmp(&other.minor))
+            .then(self.patch.cmp(&other.patch))
+    }
+}
+
+impl fmt::Display for Version {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}.{}.{}", self.major, self.minor, self.patch)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_version_comparison() {
+        assert!(Version::parse("0.8.9") >= Version::parse("0.8.9"));
+        assert!(Version::parse("0.8.10") > Version::parse("0.8.9"));
+        assert!(Version::parse("0.8.8") < Version::parse("0.8.9"));
+        assert!(Version::parse("0.9.0") > Version::parse("0.8.99"));
+        assert!(Version::parse("1.0.0") > Version::parse("0.99.99"));
+    }
+}