fixed moduleConfig.xml being case insesitive

src/main.rs

@@ -9,6 +9,7 @@ use crate::{
     linker::{create_plugins_txt, link_game_to_target, link_instance_to_target},
     load_order::LoadOrder,
     mod_config_installer::FomodInstaller,
+    utils::resolve_case_insensitive,
 };
 
 mod basic_types;
@@ -22,7 +23,7 @@ mod mod_config_installer;
 mod utils;
 
 pub fn load_mod_config(mod_root: impl AsRef<Path>) -> Result<fomod::Config, Box<dyn Error>> {
-    let path = mod_root.as_ref().join("FOMod/ModuleConfig.xml");
+    let path = resolve_case_insensitive(&mod_root, "fomod/ModuleConfig.xml")?;
     let mod_config = Config::load_from_file(path)?;
     Ok(mod_config)
 }

src/utils.rs

@@ -1,5 +1,6 @@
 use std::{
     fs::{self, DirEntry},
+    io,
     path::{Path, PathBuf},
 };
 
@@ -29,3 +30,39 @@ pub fn walk_files_recursive(
 pub fn path_to_lowercase(path: impl AsRef<Path>) -> PathBuf {
     PathBuf::from(path.as_ref().to_string_lossy().to_lowercase())
 }
+
+pub fn resolve_case_insensitive(
+    base: impl AsRef<Path>,
+    rel: impl AsRef<Path>,
+) -> io::Result<PathBuf> {
+    let mut current = base.as_ref().to_path_buf();
+
+    for part in rel.as_ref().iter() {
+        let target = part.to_string_lossy();
+
+        let mut found = None;
+
+        for entry in fs::read_dir(&current)? {
+            let entry = entry?;
+            let name = entry.file_name();
+            let name = name.to_string_lossy();
+
+            if name.eq_ignore_ascii_case(&target) {
+                found = Some(entry.path());
+                break;
+            }
+        }
+
+        match found {
+            Some(path) => current = path,
+            None => {
+                return Err(io::Error::new(
+                    io::ErrorKind::NotFound,
+                    format!("Path component not found: {}", target),
+                ));
+            }
+        }
+    }
+
+    Ok(current)
+}