feat(file): change "file_contents" to not be public

this is required so "modified" tracking works properly

src/file.rs

@@ -3,7 +3,7 @@ use std::path::PathBuf;
 
 pub struct MarkedFile {
     /// File contents that were read / need to be written
-    pub file_contents: String,
+    file_contents: String,
     /// Path of the read / to write file
     pub path: PathBuf,
     modified: bool,
@@ -31,6 +31,10 @@ impl MarkedFile {
         })
     }
 
+    pub fn get_file_contents(&self) -> &str {
+        &self.file_contents
+    }
+
     pub fn is_modified(&self) -> bool {
         self.modified
     }
@@ -43,6 +47,14 @@ impl MarkedFile {
         self.file_contents.contains(&format!("pub mod {mod_name};"))
     }
 
+    pub fn change_file_contents(&mut self, new_content: String) {
+        if !self.modified && self.file_contents != new_content {
+            self.modified = true;
+        }
+
+        self.file_contents = new_content;
+    }
+
     pub fn add_use_stmt(&mut self, use_name: &str) {
         self.file_contents = self.file_contents.trim().to_string();
         if !self.file_contents.is_empty() {

src/lib.rs

@@ -275,7 +275,7 @@ pub fn generate_files(
         let mut table_mod_rs = MarkedFile::new(table_dir.join("mod.rs"))?;
 
         table_generated_rs.ensure_file_signature()?;
-        table_generated_rs.file_contents = table.generated_code.clone();
+        table_generated_rs.change_file_contents(table.generated_code.clone());
         table_generated_rs.write()?;
 
         file_changes.push(FileChange::from(&table_generated_rs));
@@ -340,7 +340,7 @@ pub fn generate_files(
             table_mod_rs.remove_use_stmt("generated::*");
             table_mod_rs.write()?;
 
-            if table_mod_rs.file_contents.trim().is_empty() {
+            if table_mod_rs.get_file_contents().trim().is_empty() {
                 let table_mod_rs = table_mod_rs.delete()?;
                 file_changes.push(FileChange::new(table_mod_rs, FileChangeStatus::Deleted));
             } else {