Create which.rs

Author: michal92299

source-code/src/commands/which.rs

@@ -0,0 +1,39 @@
+use anyhow::{anyhow, Result};
+use std::process::Command;
+use crate::{config, output, state};
+
+pub fn run(package: &str) -> Result<()> {
+    // Try `which` in the HNM profile bin dir first
+    let profile_bin = config::profile_dir().join("bin").join(package);
+
+    if profile_bin.exists() {
+        output::ok(&format!("{}", profile_bin.display()));
+        return Ok(());
+    }
+
+    // Fallback: `which` from PATH
+    let out = Command::new("which").arg(package).output();
+    match out {
+        Ok(o) if o.status.success() => {
+            let path = String::from_utf8_lossy(&o.stdout).trim().to_string();
+            output::ok(&path);
+        }
+        _ => {
+            // Not in profile bin or PATH — maybe installed as a different binary name
+            if state::is_installed(package) {
+                let profile = config::profile_dir();
+                output::warn(&format!(
+                    "'{}' is installed but its binary was not found in {}",
+                    package,
+                    profile.join("bin").display()
+                ));
+                output::dim("The package may provide binaries under different names.");
+                output::dim(&format!("Check: ls {}",
+                                     profile.join("bin").display()));
+            } else {
+                return Err(anyhow!("'{}' is not installed — run `hnm install {}`", package, package));
+            }
+        }
+    }
+    Ok(())
+}