refactor(tvix/eval/io): use io::Error instead of tvix_eval errors r/6171

We didn't return anything useful other than ErrorKind::IO anyways.

We can use io::ErrorKind::Unsupported for DummyIO.

Fixes b/271.

Change-Id: Icb231e9b38168e8b6fa473bfa405d160357b317f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8602
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

1 files changed, 29 insertions, 6 deletions

diff --git a/tvix/eval/src/vm/generators.rs b/tvix/eval/src/vm/generators.rs
index b7d8f7aeb5c5..0e3123ae3758 100644
--- a/tvix/eval/src/vm/generators.rs
+++ b/tvix/eval/src/vm/generators.rs
@@ -406,15 +406,27 @@ impl<'o> VM<'o> {
                         }
 
                         VMRequest::PathImport(path) => {
-                            let imported =
-                                self.io_handle.import_path(&path).with_span(&span, self)?;
+                            let imported = self
+                                .io_handle
+                                .import_path(&path)
+                                .map_err(|e| ErrorKind::IO {
+                                    path: Some(path),
+                                    error: e.into(),
+                                })
+                                .with_span(&span, self)?;
 
                             message = VMResponse::Path(imported);
                         }
 
                         VMRequest::ReadToString(path) => {
-                            let content =
-                                self.io_handle.read_to_string(path).with_span(&span, self)?;
+                            let content = self
+                                .io_handle
+                                .read_to_string(path.clone())
+                                .map_err(|e| ErrorKind::IO {
+                                    path: Some(path),
+                                    error: e.into(),
+                                })
+                                .with_span(&span, self)?;
 
                             message = VMResponse::Value(Value::String(content.into()))
                         }
@@ -422,7 +434,11 @@ impl<'o> VM<'o> {
                         VMRequest::PathExists(path) => {
                             let exists = self
                                 .io_handle
-                                .path_exists(path)
+                                .path_exists(path.clone())
+                                .map_err(|e| ErrorKind::IO {
+                                    path: Some(path),
+                                    error: e.into(),
+                                })
                                 .map(Value::Bool)
                                 .with_span(&span, self)?;
 
@@ -430,7 +446,14 @@ impl<'o> VM<'o> {
                         }
 
                         VMRequest::ReadDir(path) => {
-                            let dir = self.io_handle.read_dir(path).with_span(&span, self)?;
+                            let dir = self
+                                .io_handle
+                                .read_dir(path.clone())
+                                .map_err(|e| ErrorKind::IO {
+                                    path: Some(path),
+                                    error: e.into(),
+                                })
+                                .with_span(&span, self)?;
                             message = VMResponse::Directory(dir);
                         }