stop converting relative paths to absolute

prevented downstream users from utilizing `PathSearcher` in binary

src/lib.rs

@@ -1,7 +1,6 @@
 mod error;
 mod searcher;
 mod types;
-mod utils;
 
 pub use crate::error::Error;
 pub use crate::searcher::AddSearcher;

src/searcher.rs

@@ -6,7 +6,6 @@ use std::io::Read;
 use std::path::{Path, PathBuf};
 
 use crate::types::Result;
-use crate::utils;
 
 /// Stores Lua modules indexed by module name, and provides an `rlua::MetaMethod`
 /// to enable `require`ing the stored modules by name in an `rlua::Context`.
@@ -113,17 +112,8 @@ where
         methods.add_meta_method(MetaMethod::Call, |lua_ctx, this, name: String| {
             match this.modules.get(&name) {
                 Some(ref path) => {
-                    let path = path.as_ref();
+                    let path = path.as_ref().to_path_buf();
-
-                    // Ensure `path` is relative to `$CARGO_MANIFEST_DIR`.
-                    let path = if path.is_relative() {
-                        utils::runtime_root().join(path)
-                    } else {
-                        path.to_path_buf()
-                    };
-
                     let content = (this.transform)(path)?;
-
                     Ok(Value::Function(
                         lua_ctx
                             .load(&content)

src/utils.rs

@@ -1,6 +0,0 @@
-use std::path::PathBuf;
-
-/// Return the value of `$CARGO_MANIFEST_DIR` at runtime.
-pub(crate) fn runtime_root() -> PathBuf {
-    PathBuf::new().join(std::env::var("CARGO_MANIFEST_DIR").unwrap())
-}