feat(cli): plumb version subcommand

.pre-commit-config.yaml

@@ -16,3 +16,14 @@ repos:
     rev: v1.5.5
     hooks:
       - id: remove-crlf
+  - repo: https://github.com/doublify/pre-commit-rust
+    rev: v1.0
+    hooks:
+      - id: fmt
+      - id: cargo-check
+      - id: clippy
+  - repo: https://github.com/compilerla/conventional-pre-commit
+    rev: v3.2.0
+    hooks:
+      - id: conventional-pre-commit
+        stages: [commit-msg]

Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { version = "4.5.4", features = ["derive"] }

src/lib.rs

@@ -1,3 +1,16 @@
-pub fn hello() -> String {
-    "Hello, world!".to_string()
+pub mod version;
+
+pub fn command_version() -> String {
+    let version = version::version();
+    format!("plumb {}", version)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_version() {
+        assert!(command_version().contains("plumb"));
+    }
 }

src/main.rs

@@ -1,5 +1,31 @@
-use plumb::hello;
+use clap::{Parser, Subcommand};
+use plumb::command_version;
+
+#[derive(Parser, Debug)]
+#[command(
+    name = "plumb",
+    about = "A project manager for your development projects."
+)]
+struct Args {
+    #[command(subcommand)]
+    command: Option<Command>,
+}
+
+#[derive(Debug, Subcommand)]
+enum Command {
+    /// Prints the version of the CLI.
+    Version,
+}
 
 pub fn main() {
-    println!("{}", hello());
+    let cli = Args::parse();
+
+    match cli.command {
+        Some(Command::Version) => {
+            command_version();
+        }
+        _ => {
+            println!("Invalid arguments. Try `plumb help` for more information.");
+        }
+    }
 }

src/version.rs

@@ -0,0 +1,85 @@
+use std::fmt::{Display, Formatter, Result};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct SemanticVersion {
+    major: u8,
+    minor: u8,
+    patch: u8,
+}
+
+pub fn version() -> SemanticVersion {
+    SemanticVersion::from_env()
+}
+
+impl SemanticVersion {
+    pub fn new(major: u8, minor: u8, patch: u8) -> Self {
+        Self {
+            major,
+            minor,
+            patch,
+        }
+    }
+
+    fn from_env() -> Self {
+        Self::from(env!("CARGO_PKG_VERSION"))
+    }
+
+    pub fn major(&self) -> u8 {
+        self.major
+    }
+
+    pub fn minor(&self) -> u8 {
+        self.minor
+    }
+
+    pub fn patch(&self) -> u8 {
+        self.patch
+    }
+}
+
+impl From<&str> for SemanticVersion {
+    fn from(version: &str) -> Self {
+        let parts: Vec<&str> = version.split('.').collect();
+        let major = parts[0].parse().unwrap();
+        let minor = parts[1].parse().unwrap();
+        let patch = parts[2].parse().unwrap();
+
+        Self {
+            major,
+            minor,
+            patch,
+        }
+    }
+}
+
+impl Display for SemanticVersion {
+    fn fmt(&self, f: &mut Formatter) -> Result {
+        write!(f, "{}.{}.{}", self.major, self.minor, self.patch)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::env;
+
+    use super::*;
+
+    #[test]
+    fn test_version() {
+        assert_eq!(version().to_string(), env!("CARGO_PKG_VERSION"));
+    }
+
+    #[test]
+    fn test_from_str() {
+        let version = SemanticVersion::from("0.1.0");
+        assert_eq!(version.major(), 0);
+        assert_eq!(version.minor(), 1);
+        assert_eq!(version.patch(), 0);
+    }
+
+    #[test]
+    fn test_display() {
+        let version = SemanticVersion::new(0, 1, 0);
+        assert_eq!(version.to_string(), "0.1.0");
+    }
+}