fix: when formatting and add some methods to Project::Error

crates/project/src/error.rs

@@ -53,7 +53,7 @@ pub enum Error {
 }
 
 impl Error {
-    pub fn total(&self) -> usize {
+    pub fn len(&self) -> usize {
         match self {
             Error::List(errors) => errors.len(),
             _ => 1,
@@ -84,6 +84,33 @@ impl Error {
 
         Error::List(errors)
     }
+
+    pub fn append(self, next: Self) -> Self {
+        match (self, next) {
+            (Error::List(mut errors), Error::List(mut next_errors)) => {
+                errors.append(&mut next_errors);
+
+                Error::List(errors)
+            }
+            (Error::List(mut errors), rest) => {
+                errors.push(rest);
+
+                Error::List(errors)
+            }
+            (rest, Error::List(mut next_errors)) => {
+                let mut errors = vec![rest];
+
+                errors.append(&mut next_errors);
+
+                Error::List(errors)
+            }
+            (error, next_error) => Error::List(vec![error, next_error]),
+        }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        matches!(self, Error::List(errors) if errors.is_empty())
+    }
 }
 
 impl Debug for Error {

crates/project/src/format.rs

@@ -77,7 +77,7 @@ fn format_files(files: Vec<String>) -> Result<(), Error> {
 
 fn unformatted_files(files: Vec<String>) -> Result<Vec<Unformatted>, Error> {
     let mut problem_files = Vec::with_capacity(files.len());
-    let mut errors = Vec::new();
+    let mut errors = Error::List(vec![]);
 
     for file_path in files {
         let path = PathBuf::from_str(&file_path).unwrap();
@@ -85,19 +85,18 @@ fn unformatted_files(files: Vec<String>) -> Result<Vec<Unformatted>, Error> {
         if path.is_dir() {
             for path in aiken_files_excluding_gitignore(&path) {
                 if let Err(err) = format_file(&mut problem_files, path) {
-                    errors.push(err);
+                    errors = errors.append(err);
                 };
             }
         } else if let Err(err) = format_file(&mut problem_files, path) {
-            println!("{:?}", err);
-            errors.push(err);
+            errors = errors.append(err);
         }
     }
 
     if errors.is_empty() {
         Ok(problem_files)
     } else {
-        Err(Error::List(errors))
+        Err(errors)
     }
 }