can spawn processes w00t

src/main.rs

@@ -142,12 +142,66 @@ fn newline(stdout: HANDLE) -> Result<()> {
 }
 
 fn eval(line: String) -> Result<()> {
-    if line == "pwd" {
-        let pb = std::env::current_dir()?;
-        println!("{}", pb.as_path().as_os_str().to_str().unwrap());
+    let parts: Vec<&str> = line.split_whitespace().collect();
+    if parts.len() == 0 {
         return Ok(());
     }
-    println!("{}", line);
+
+    let cmd = parts[0];
+    match cmd {
+        "pwd" => {
+            let pb = std::env::current_dir()?;
+            println!("{}", pb.as_path().as_os_str().to_str().unwrap());
+            return Ok(());
+        }
+        "printenv" => {
+            if parts.len() > 1 {
+                let name = parts[1];
+                match std::env::var(name) {
+                    Ok(val) => println!("{}", val),
+                    Err(e) => println!("ERROR {}", e),
+                }
+            } else {
+                println!("which variable you fucking dork");
+            }
+            return Ok(());
+        }
+        "which" => {
+            if parts.len() > 1 {
+                let path = std::env::var("path").unwrap();
+                let dirs: Vec<&str> = path.split(";").collect();
+                for d in dirs {
+                    let dir = std::path::Path::new(d);
+                    let fname = dir.join(parts[1]).with_extension("exe");
+                    if fname.exists() && fname.is_file() {
+                        println!("{}", fname.to_str().unwrap());
+                        return Ok(());
+                    }
+                }
+                println!("not found: {}", parts[1]);
+                return Ok(());
+            }
+        }
+        "echo" => {
+            let rest: Vec<&str> = parts[1..].to_vec();
+            println!("{:?}", rest);
+        }
+        _ => {
+            let mut proc = std::process::Command::new(cmd);
+            match proc.spawn() {
+                Ok(mut child) => {
+                    if let Err(e) = child.wait() {
+                        println!("error: {}", e)
+                    }
+                }
+                Err(e) => {
+                    println!("error: {}", e)
+                }
+            }
+            return Ok(());
+        }
+    }
+    // println!("Error: no such command: {}", cmd);
     Ok(())
 }