Add functions for tox crate version information

tox_node/src/main.rs

@@ -40,6 +40,23 @@ const ONION_CHANNEL_SIZE: usize = 32;
 /// Channel size for DHT packets.
 const DHT_CHANNEL_SIZE: usize = 32;
 
+/// The tox crate version string in the form "major.minor.patch" (e.g. "1.2.3")
+pub fn crate_version() -> String {
+    env!("CARGO_PKG_VERSION").to_string()
+}
+/// The tox crate major version represented as unsigned integer
+pub fn crate_version_major() -> u32 {
+    env!("CARGO_PKG_VERSION_MAJOR").parse().expect("Invalid major version")
+}
+/// The tox crate minor version represented as unsigned integer
+pub fn crate_version_minor() -> u32 {
+    env!("CARGO_PKG_VERSION_MINOR").parse().expect("Invalid minor version")
+}
+/// The tox crate patch version represented as unsigned integer
+pub fn crate_version_patch() -> u32 {
+    env!("CARGO_PKG_VERSION_PATCH").parse().expect("Invalid patch version")
+}
+
 /// Get version in format 3AAABBBCCC, where A B and C are major, minor and patch
 /// versions of node. `tox-bootstrapd` uses similar scheme but with leading 1.
 /// Before it used format YYYYMMDDVV so the leading numeral was 2. To make a
@@ -383,3 +400,29 @@ fn main() {
 
     run(future, config.threads);
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn crate_version_is_not_empty() {
+        assert_ne!(crate::crate_version(), "");
+    }
+
+    #[test]
+    fn crate_version_major() {
+        let v = crate::crate_version_major();
+        assert_eq!(v, env!("CARGO_PKG_VERSION_MAJOR").parse::<u32>().unwrap());
+    }
+
+    #[test]
+    fn crate_version_minor() {
+        let v = crate::crate_version_minor();
+        assert_eq!(v, env!("CARGO_PKG_VERSION_MINOR").parse::<u32>().unwrap());
+    }
+
+    #[test]
+    fn crate_version_patch() {
+        let v = crate::crate_version_patch();
+        assert_eq!(v, env!("CARGO_PKG_VERSION_PATCH").parse::<u32>().unwrap());
+    }
+}