Add self-update functionality

- Add 'update' command to check for and install latest release
- Use self_update crate for GitHub release integration
- Update version to 0.2.0
- Update README and CHANGELOG with update instructions

Users can now run 'cohort-tracker update' to automatically
update to the latest version from GitHub releases.

Author: cj-taylor

CHANGELOG.md

@@ -7,6 +7,8 @@ Releases are tagged with the date in YYYY.MM.DD format (e.g., v2026.01.19).
 ## [Unreleased]
 
 ### Added
+- Self-update functionality with `update` command
+- Automatic version checking (checks GitHub for latest release)
 
 ### Changed
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cohort-tracker"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 
 [dependencies]
@@ -21,6 +21,7 @@ chrono = "0.4"
 async-trait = "0.1"
 async-stream = "0.3"
 futures-util = "0.3"
+self_update = "0.41"
 
 [dev-dependencies]
 tempfile = "3.8"

README.md

@@ -70,6 +70,9 @@ cargo run -- status
 
 # Start the dashboard
 make serve
+
+# Update to the latest version
+cargo run -- update
 ```
 
 ## Common Commands
@@ -87,6 +90,9 @@ cargo run -- list
 # Activate/deactivate classes
 cargo run -- activate data-analysis-pathway-module-1-aug-2
 cargo run -- deactivate old-class-name
+
+# Update to latest version
+cargo run -- update
 ```
 
 ## Documentation

src/cli.rs

@@ -64,6 +64,9 @@ pub enum Commands {
         #[arg(long)]
         mentors: Option<String>,
     },
+
+    /// Update to the latest version
+    Update,
 }
 
 pub async fn handle_init(email: String, password: String, api_base: String) -> Result<()> {

src/lib.rs

@@ -5,3 +5,4 @@ pub mod db;
 pub mod lms;
 pub mod models;
 pub mod sync;
+pub mod update;

src/main.rs

@@ -37,6 +37,9 @@ async fn main() -> Result<()> {
         cli::Commands::Import { students, mentors } => {
             cli::handle_import(students, mentors).await?;
         }
+        cli::Commands::Update => {
+            cohort_tracker::update::perform_update().await?;
+        }
     }
 
     Ok(())

src/update.rs

@@ -0,0 +1,58 @@
+use anyhow::Result;
+use serde::Deserialize;
+
+const REPO_OWNER: &str = "cj-taylor";
+const REPO_NAME: &str = "codeyou-cohort-tracker";
+const CURRENT_VERSION: &str = env!("CARGO_PKG_VERSION");
+
+#[derive(Debug, Deserialize)]
+struct Release {
+    tag_name: String,
+}
+
+pub async fn check_for_updates() -> Result<Option<String>> {
+    let client = reqwest::Client::new();
+    let url = format!(
+        "https://api.github.com/repos/{}/{}/releases/latest",
+        REPO_OWNER, REPO_NAME
+    );
+
+    let response = client
+        .get(&url)
+        .header("User-Agent", "cohort-tracker")
+        .send()
+        .await?;
+
+    if !response.status().is_success() {
+        return Ok(None);
+    }
+
+    let release: Release = response.json().await?;
+
+    // Compare versions - if tag is different from current, there's an update
+    if release.tag_name != format!("v{}", CURRENT_VERSION) {
+        Ok(Some(release.tag_name))
+    } else {
+        Ok(None)
+    }
+}
+
+pub async fn perform_update() -> Result<()> {
+    println!("Checking for updates...");
+
+    let status = self_update::backends::github::Update::configure()
+        .repo_owner(REPO_OWNER)
+        .repo_name(REPO_NAME)
+        .bin_name("cohort-tracker")
+        .current_version(CURRENT_VERSION)
+        .build()?
+        .update()?;
+
+    if status.updated() {
+        println!("✓ Updated to version {}", status.version());
+    } else {
+        println!("Already up to date (version {})", CURRENT_VERSION);
+    }
+
+    Ok(())
+}