Improve error reporting for IO issues

server/src/commands/build.rs

@@ -10,7 +10,7 @@ use failure::Fail;
 use crate::{
     rbx_session::construct_oneoff_tree,
     project::{Project, ProjectLoadFuzzyError},
-    imfs::Imfs,
+    imfs::{Imfs, FsError},
 };
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -55,14 +55,18 @@ pub enum BuildError {
     XmlModelEncodeError(rbx_xml::EncodeError),
 
     #[fail(display = "Binary model file error")]
-    BinaryModelEncodeError(rbx_binary::EncodeError)
+    BinaryModelEncodeError(rbx_binary::EncodeError),
+
+    #[fail(display = "{}", _0)]
+    FsError(#[fail(cause)] FsError),
 }
 
 impl_from!(BuildError {
     ProjectLoadFuzzyError => ProjectLoadError,
     io::Error => IoError,
     rbx_xml::EncodeError => XmlModelEncodeError,
-    rbx_binary::EncodeError => BinaryModelEncodeError
+    rbx_binary::EncodeError => BinaryModelEncodeError,
+    FsError => FsError,
 });
 
 pub fn build(options: &BuildOptions) -> Result<(), BuildError> {

server/src/commands/serve.rs

@@ -9,6 +9,7 @@ use failure::Fail;
 use crate::{
     project::{Project, ProjectLoadFuzzyError},
     web::Server,
+    imfs::FsError,
     live_session::LiveSession,
 };
 
@@ -24,10 +25,14 @@ pub struct ServeOptions {
 pub enum ServeError {
    #[fail(display = "Project load error: {}", _0)]
    ProjectLoadError(#[fail(cause)] ProjectLoadFuzzyError),
+
+   #[fail(display = "{}", _0)]
+   FsError(#[fail(cause)] FsError),
 }
 
 impl_from!(ServeError {
     ProjectLoadFuzzyError => ProjectLoadError,
+    FsError => FsError,
 });
 
 pub fn serve(options: &ServeOptions) -> Result<(), ServeError> {
@@ -38,7 +43,7 @@ pub fn serve(options: &ServeOptions) -> Result<(), ServeError> {
     info!("Found project at {}", project.file_location.display());
     info!("Using project {:#?}", project);
 
-    let live_session = Arc::new(LiveSession::new(Arc::clone(&project)).unwrap());
+    let live_session = Arc::new(LiveSession::new(Arc::clone(&project))?);
     let server = Server::new(Arc::clone(&live_session));
 
     let port = options.port

server/src/commands/upload.rs

@@ -11,7 +11,7 @@ use reqwest::header::{ACCEPT, USER_AGENT, CONTENT_TYPE, COOKIE};
 use crate::{
     rbx_session::construct_oneoff_tree,
     project::{Project, ProjectLoadFuzzyError},
-    imfs::Imfs,
+    imfs::{Imfs, FsError},
 };
 
 #[derive(Debug, Fail)]
@@ -33,6 +33,9 @@ pub enum UploadError {
 
     #[fail(display = "XML model file error")]
     XmlModelEncodeError(rbx_xml::EncodeError),
+
+    #[fail(display = "{}", _0)]
+    FsError(#[fail(cause)] FsError),
 }
 
 impl_from!(UploadError {
@@ -40,6 +43,7 @@ impl_from!(UploadError {
     io::Error => IoError,
     reqwest::Error => HttpError,
     rbx_xml::EncodeError => XmlModelEncodeError,
+    FsError => FsError,
 });
 
 #[derive(Debug)]