Change clear_path to return Result<bool>

So `Ok(true)` means the path is clear while `Ok(false)` means the user doesn't want to overwrite

src/archive/tar.rs

@@ -31,7 +31,7 @@ pub fn unpack_archive(
         let mut file = file?;
 
         let file_path = output_folder.join(file.path()?);
-        if utils::clear_path(&file_path, question_policy)?.is_none() {
+        if !utils::clear_path(&file_path, question_policy)? {
             // User doesn't want to overwrite
             continue;
         }

src/archive/zip.rs

@@ -39,7 +39,7 @@ where
         };
 
         let file_path = into.join(file_path);
-        if clear_path(&file_path, question_policy)?.is_none() {
+        if !clear_path(&file_path, question_policy)? {
             // User doesn't want to overwrite
             continue;
         }

src/commands.rs

@@ -342,7 +342,7 @@ fn decompress_file(
     //
     // Any other Zip decompression done can take up the whole RAM and freeze ouch.
     if formats.len() == 1 && *formats[0].compression_formats == [Zip] {
-        if utils::clear_path(output_dir, question_policy)?.is_none() {
+        if !utils::clear_path(output_dir, question_policy)? {
             // User doesn't want to overwrite
             return Ok(());
         }
@@ -374,7 +374,7 @@ fn decompress_file(
         reader = chain_reader_decoder(format, reader)?;
     }
 
-    if utils::clear_path(&output_path, question_policy)?.is_none() {
+    if !utils::clear_path(&output_path, question_policy)? {
         // User doesn't want to overwrite
         return Ok(());
     }

src/utils/fs.rs

@@ -19,14 +19,14 @@ pub fn dir_is_empty(dir_path: &Path) -> bool {
     dir_path.read_dir().map(is_empty).unwrap_or_default()
 }
 
-/// Remove `path` asking the user to overwrite if necessary
-/// `Ok(Some(())` means the path is clear,
-/// `Ok(None)` means the user doesn't want to overwrite
-/// `Err(_)` is an error
-// ToDo: Actual type to translate the above might be clearer?
-pub fn clear_path(path: &Path, question_policy: QuestionPolicy) -> crate::Result<Option<()>> {
+/// Remove `path` asking the user to overwrite if necessary.
+///
+/// * `Ok(true)` means the path is clear,
+/// * `Ok(false)` means the user doesn't want to overwrite
+/// * `Err(_)` is an error
+pub fn clear_path(path: &Path, question_policy: QuestionPolicy) -> crate::Result<bool> {
     if path.exists() && !user_wants_to_overwrite(path, question_policy)? {
-        return Ok(None);
+        return Ok(false);
     }
 
     if path.is_dir() {
@@ -35,7 +35,7 @@ pub fn clear_path(path: &Path, question_policy: QuestionPolicy) -> crate::Result
         fs::remove_file(path)?;
     }
 
-    Ok(Some(()))
+    Ok(true)
 }
 
 /// Creates a directory at the path, if there is nothing there.