Improve mapping error handling

src/mapper/error.rs

@@ -1,4 +1,4 @@
-use std::io;
+use std::{io, path::PathBuf};
 
 use miette::Diagnostic;
 use thiserror::Error;
@@ -24,4 +24,12 @@ pub enum MapperError {
 
     #[error("IO Error: {0}")]
     Io(#[from] io::Error),
+
+    #[error("Failed to map directory {src:?}")]
+    DirMapping {
+        src: PathBuf,
+
+        #[source]
+        err: io::Error,
+    },
 }

src/mapper/mapped_dir.rs

@@ -1,5 +1,6 @@
 use std::{
     collections::HashSet,
+    io,
     path::{Path, PathBuf},
 };
 
@@ -7,7 +8,7 @@ use tokio::fs::{self, DirEntry};
 
 use crate::{consts::BIN_DIR, repository::node_path::NodePath};
 
-use super::error::MapperResult;
+use super::error::{MapperError, MapperResult};
 
 struct NodeApp {
     info: DirEntry,
@@ -30,11 +31,13 @@ impl NodeApp {
     /// creates wrappers to map this application
     pub async fn map_executable(&self) -> MapperResult<()> {
         let src_path = BIN_DIR.join(self.info.file_name());
-        self.write_wrapper_script(&src_path).await
+        self.write_wrapper_script(&src_path)
+            .await
+            .map_err(|err| MapperError::DirMapping { src: src_path, err })
     }
 
     #[cfg(not(target_os = "windows"))]
-    async fn write_wrapper_script(&self, path: &Path) -> MapperResult<()> {
+    async fn write_wrapper_script(&self, path: &Path) -> Result<(), io::Error> {
         fs::write(path, format!("#!/bin/sh\nnenv exec {} \"$@\"", self.name)).await?;
         let src_metadata = self.info.metadata().await?;
         fs::set_permissions(&path, src_metadata.permissions()).await?;
@@ -43,7 +46,7 @@ impl NodeApp {
     }
 
     #[cfg(target_os = "windows")]
-    async fn write_wrapper_script(&self, path: &Path) -> MapperResult<()> {
+    async fn write_wrapper_script(&self, path: &Path) -> Result<(), io::Error> {
         fs::write(
             path.with_extension("bat"),
             format!("nenv exec {} %*", self.name),
@@ -74,7 +77,12 @@ pub async fn map_node_bin(node_path: NodePath) -> MapperResult<()> {
 
 async fn get_applications(path: &PathBuf) -> MapperResult<Vec<NodeApp>> {
     let mut files = Vec::new();
-    let mut iter = fs::read_dir(path).await?;
+    let mut iter = fs::read_dir(path)
+        .await
+        .map_err(|err| MapperError::DirMapping {
+            src: path.to_owned(),
+            err,
+        })?;
 
     while let Some(entry) = iter.next_entry().await? {
         if entry.path().is_file() {