Resolve some pathing issues; cleanup.

crates/core/src/prey.rs

@@ -1,6 +1,6 @@
 use std::fs::{File, OpenOptions};
 use std::io::Read;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 use serde::{Deserialize, Serialize};
 
@@ -28,6 +28,11 @@ impl Prey {
         }
     }
 
+    pub fn with_entry_point<P: AsRef<Path>>(&mut self, entry_point: P) -> &mut Self {
+        self.package.entry_point = entry_point.as_ref().to_path_buf();
+        self
+    }
+
     pub fn entry_point(&self) -> PathBuf {
         self.package.entry_point.clone()
     }