chore: pass in file reader to FileManager at runtime

compiler/fm/Cargo.toml

@@ -9,7 +9,6 @@ license.workspace = true
 
 [dependencies]
 codespan-reporting.workspace = true
-cfg-if.workspace = true
 rust-embed = "6.6.0"
 serde.workspace = true
 

compiler/fm/src/file_reader.rs

@@ -5,6 +5,8 @@ use std::path::Path;
 // Based on the environment, we either read files using the rust standard library or we
 // read files using the javascript host function
 
+pub type FileReader = dyn Fn(&Path) -> std::io::Result<String> + Send;
+
 #[derive(RustEmbed)]
 #[folder = "../../noir_stdlib/src"]
 #[cfg_attr(not(target_os = "windows"), prefix = "std/")]
@@ -35,37 +37,13 @@ fn get_stdlib_asset(path: &Path) -> std::io::Result<String> {
     }
 }
 
-pub(crate) fn read_file_to_string(path_to_file: &Path) -> std::io::Result<String> {
+pub(crate) fn read_file_to_string(
+    path_to_file: &Path,
+    get_non_stdlib_asset: &impl Fn(&Path) -> std::io::Result<String>,
+) -> std::io::Result<String> {
     if is_stdlib_asset(path_to_file) {
         get_stdlib_asset(path_to_file)
     } else {
         get_non_stdlib_asset(path_to_file)
     }
 }
-
-cfg_if::cfg_if! {
-    if #[cfg(all(target_arch = "wasm32", not(target_os = "wasi")))] {
-        use wasm_bindgen::{prelude::*, JsValue};
-
-        #[wasm_bindgen(module = "@noir-lang/source-resolver")]
-        extern "C" {
-
-            #[wasm_bindgen(catch)]
-            fn read_file(path: &str) -> Result<String, JsValue>;
-
-        }
-
-        fn get_non_stdlib_asset(path_to_file: &Path) -> std::io::Result<String> {
-            let path_str = path_to_file.to_str().unwrap();
-            match read_file(path_str) {
-                Ok(buffer) => Ok(buffer),
-                Err(_) => Err(Error::new(ErrorKind::Other, "could not read file using wasm")),
-            }
-        }
-    } else {
-
-        fn get_non_stdlib_asset(path_to_file: &Path) -> std::io::Result<String> {
-            std::fs::read_to_string(path_to_file)
-        }
-    }
-}

compiler/fm/src/lib.rs

@@ -8,6 +8,7 @@ mod file_reader;
 
 pub use file_map::{File, FileId, FileMap, PathString};
 use file_reader::is_stdlib_asset;
+pub use file_reader::FileReader;
 
 use std::{
     collections::HashMap,
@@ -19,21 +20,33 @@ pub const FILE_EXTENSION: &str = "nr";
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 struct VirtualPath(PathBuf);
 
-#[derive(Debug)]
 pub struct FileManager {
     root: PathBuf,
     file_map: file_map::FileMap,
     id_to_path: HashMap<FileId, VirtualPath>,
     path_to_id: HashMap<VirtualPath, FileId>,
+    file_reader: Box<FileReader>,
+}
+
+impl std::fmt::Debug for FileManager {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("FileManager")
+            .field("root", &self.root)
+            .field("file_map", &self.file_map)
+            .field("id_to_path", &self.id_to_path)
+            .field("path_to_id", &self.path_to_id)
+            .finish()
+    }
 }
 
 impl FileManager {
-    pub fn new(root: &Path) -> Self {
+    pub fn new(root: &Path, file_reader: Box<FileReader>) -> Self {
         Self {
             root: root.normalize(),
             file_map: Default::default(),
             id_to_path: Default::default(),
             path_to_id: Default::default(),
+            file_reader,
         }
     }
 
@@ -58,7 +71,7 @@ impl FileManager {
         }
 
         // Otherwise we add the file
-        let source = file_reader::read_file_to_string(&resolved_path).ok()?;
+        let source = file_reader::read_file_to_string(&resolved_path, &self.file_reader).ok()?;
         let file_id = self.file_map.add_file(resolved_path.into(), source);
         self.register_path(file_id, path_to_file);
         Some(file_id)
@@ -225,7 +238,7 @@ mod tests {
         let entry_file_name = Path::new("my_dummy_file.nr");
         create_dummy_file(&dir, entry_file_name);
 
-        let mut fm = FileManager::new(dir.path());
+        let mut fm = FileManager::new(dir.path(), Box::new(|path| std::fs::read_to_string(path)));
 
         let file_id = fm.add_file(entry_file_name).unwrap();
 
@@ -240,7 +253,7 @@ mod tests {
         let file_name = Path::new("foo.nr");
         create_dummy_file(&dir, file_name);
 
-        let mut fm = FileManager::new(dir.path());
+        let mut fm = FileManager::new(dir.path(), Box::new(|path| std::fs::read_to_string(path)));
 
         let file_id = fm.add_file(file_name).unwrap();
 
@@ -250,7 +263,7 @@ mod tests {
     #[test]
     fn path_resolve_sub_module() {
         let dir = tempdir().unwrap();
-        let mut fm = FileManager::new(dir.path());
+        let mut fm = FileManager::new(dir.path(), Box::new(|path| std::fs::read_to_string(path)));
 
         // Create a lib.nr file at the root.
         // we now have dir/lib.nr
@@ -296,7 +309,7 @@ mod tests {
         let sub_dir = TempDir::new_in(&dir).unwrap();
         let sub_sub_dir = TempDir::new_in(&sub_dir).unwrap();
 
-        let mut fm = FileManager::new(dir.path());
+        let mut fm = FileManager::new(dir.path(), Box::new(|path| std::fs::read_to_string(path)));
 
         // Create a lib.nr file at the root.
         let file_name = Path::new("lib.nr");

compiler/wasm/Cargo.toml

@@ -19,6 +19,7 @@ noirc_driver.workspace = true
 noirc_frontend.workspace = true
 wasm-bindgen.workspace = true
 serde.workspace = true
+cfg-if.workspace = true
 
 console_error_panic_hook = "0.1.7"
 gloo-utils = { version = "0.1", features = ["serde"] }

compiler/wasm/src/compile.rs

@@ -98,7 +98,7 @@ pub fn compile(args: JsValue) -> JsValue {
     debug!("Compiler configuration {:?}", &options);
 
     let root = Path::new("/");
-    let fm = FileManager::new(root);
+    let fm = FileManager::new(root, Box::new(get_non_stdlib_asset));
     let graph = CrateGraph::default();
     let mut context = Context::new(fm, graph);
 
@@ -136,3 +136,27 @@ pub fn compile(args: JsValue) -> JsValue {
         <JsValue as JsValueSerdeExt>::from_serde(&optimized_program).unwrap()
     }
 }
+
+cfg_if::cfg_if! {
+    if #[cfg(target_os = "wasi")] {
+        fn get_non_stdlib_asset(path_to_file: &Path) -> std::io::Result<String> {
+            std::fs::read_to_string(path_to_file)
+        }
+    } else {
+        use std::io::{Error, ErrorKind};
+
+        #[wasm_bindgen(module = "@noir-lang/source-resolver")]
+        extern "C" {
+            #[wasm_bindgen(catch)]
+            fn read_file(path: &str) -> Result<String, JsValue>;
+        }
+
+        fn get_non_stdlib_asset(path_to_file: &Path) -> std::io::Result<String> {
+            let path_str = path_to_file.to_str().unwrap();
+            match read_file(path_str) {
+                Ok(buffer) => Ok(buffer),
+                Err(_) => Err(Error::new(ErrorKind::Other, "could not read file using wasm")),
+            }
+        }
+    }
+}

compiler/wasm/src/lib.rs

@@ -1,4 +1,3 @@
-#![forbid(unsafe_code)]
 #![warn(unused_crate_dependencies, unused_extern_crates)]
 #![warn(unreachable_pub)]
 #![warn(clippy::semicolon_if_nothing_returned)]

tooling/lsp/Cargo.toml

@@ -24,6 +24,7 @@ serde.workspace = true
 serde_json.workspace = true
 toml.workspace = true
 tower.workspace = true
+cfg-if.workspace = true
 async-lsp = { version = "0.0.5", default-features = false, features = ["omni-trait"] }
 
 [dev-dependencies]

tooling/lsp/src/lib.rs

@@ -1,7 +1,7 @@
 use std::{
     future::{self, Future},
     ops::{self, ControlFlow},
-    path::PathBuf,
+    path::{Path, PathBuf},
     pin::Pin,
     task::{self, Poll},
 };
@@ -232,7 +232,7 @@ fn on_test_run_request(
     // Since we filtered on crate name, this should be the only item in the iterator
     match workspace.into_iter().next() {
         Some(package) => {
-            let (mut context, crate_id) = prepare_package(package);
+            let (mut context, crate_id) = prepare_package(package, Box::new(get_non_stdlib_asset));
             if check_crate(&mut context, crate_id, false).is_err() {
                 let result = NargoTestRunResult {
                     id: params.id.clone(),
@@ -328,7 +328,7 @@ fn on_tests_request(
     let mut package_tests = Vec::new();
 
     for package in &workspace {
-        let (mut context, crate_id) = prepare_package(package);
+        let (mut context, crate_id) = prepare_package(package, Box::new(get_non_stdlib_asset));
         // We ignore the warnings and errors produced by compilation for producing tests
         // because we can still get the test functions even if compilation fails
         let _ = check_crate(&mut context, crate_id, false);
@@ -401,7 +401,7 @@ fn on_code_lens_request(
     let mut lenses: Vec<CodeLens> = vec![];
 
     for package in &workspace {
-        let (mut context, crate_id) = prepare_package(package);
+        let (mut context, crate_id) = prepare_package(package, Box::new(get_non_stdlib_asset));
         // We ignore the warnings and errors produced by compilation for producing code lenses
         // because we can still get the test functions even if compilation fails
         let _ = check_crate(&mut context, crate_id, false);
@@ -620,7 +620,8 @@ fn on_did_save_text_document(
     let mut diagnostics = Vec::new();
 
     for package in &workspace {
-        let (mut context, crate_id) = prepare_package(package);
+        let (mut context, crate_id) =
+            prepare_package(package, Box::new(|path| std::fs::read_to_string(path)));
 
         let file_diagnostics = match check_crate(&mut context, crate_id, false) {
             Ok(((), warnings)) => warnings,
@@ -804,3 +805,29 @@ mod lsp_tests {
         assert!(response.server_info.is_none());
     }
 }
+
+cfg_if::cfg_if! {
+    if #[cfg(all(target_arch = "wasm32", not(target_os = "wasi")))] {
+        use wasm_bindgen::{prelude::*, JsValue};
+
+        #[wasm_bindgen(module = "@noir-lang/source-resolver")]
+        extern "C" {
+
+            #[wasm_bindgen(catch)]
+            fn read_file(path: &str) -> Result<String, JsValue>;
+
+        }
+
+        fn get_non_stdlib_asset(path_to_file: &Path) -> std::io::Result<String> {
+            let path_str = path_to_file.to_str().unwrap();
+            match read_file(path_str) {
+                Ok(buffer) => Ok(buffer),
+                Err(_) => Err(Error::new(ErrorKind::Other, "could not read file using wasm")),
+            }
+        }
+    } else {
+        fn get_non_stdlib_asset(path_to_file: &Path) -> std::io::Result<String> {
+            std::fs::read_to_string(path_to_file)
+        }
+    }
+}

tooling/nargo/src/lib.rs

@@ -16,7 +16,7 @@ pub mod workspace;
 
 use std::collections::BTreeMap;
 
-use fm::FileManager;
+use fm::{FileManager, FileReader};
 use noirc_driver::{add_dep, prepare_crate, prepare_dependency};
 use noirc_frontend::{
     graph::{CrateGraph, CrateId, CrateName},
@@ -42,9 +42,9 @@ pub fn prepare_dependencies(
     }
 }
 
-pub fn prepare_package(package: &Package) -> (Context, CrateId) {
+pub fn prepare_package(package: &Package, file_reader: Box<FileReader>) -> (Context, CrateId) {
     // TODO: FileManager continues to leak into various crates
-    let fm = FileManager::new(&package.root_dir);
+    let fm = FileManager::new(&package.root_dir, file_reader);
     let graph = CrateGraph::default();
     let mut context = Context::new(fm, graph);
 

tooling/nargo_cli/src/cli/check_cmd.rs

@@ -49,7 +49,8 @@ pub(crate) fn run(
 }
 
 fn check_package(package: &Package, compile_options: &CompileOptions) -> Result<(), CompileError> {
-    let (mut context, crate_id) = prepare_package(package);
+    let (mut context, crate_id) =
+        prepare_package(package, Box::new(|path| std::fs::read_to_string(path)));
     check_crate_and_report_errors(&mut context, crate_id, compile_options.deny_warnings)?;
 
     if package.is_library() || package.is_contract() {

tooling/nargo_cli/src/cli/compile_cmd.rs

@@ -160,7 +160,8 @@ fn compile_program(
     np_language: Language,
     is_opcode_supported: &impl Fn(&Opcode) -> bool,
 ) -> (FileManager, CompilationResult<CompiledProgram>) {
-    let (mut context, crate_id) = prepare_package(package);
+    let (mut context, crate_id) =
+        prepare_package(package, Box::new(|path| std::fs::read_to_string(path)));
 
     let cached_program = if let Ok(preprocessed_program) =
         read_program_from_file(workspace.package_build_path(package))
@@ -201,7 +202,8 @@ fn compile_contract(
     np_language: Language,
     is_opcode_supported: &impl Fn(&Opcode) -> bool,
 ) -> (FileManager, CompilationResult<CompiledContract>) {
-    let (mut context, crate_id) = prepare_package(package);
+    let (mut context, crate_id) =
+        prepare_package(package, Box::new(|path| std::fs::read_to_string(path)));
     let (contract, warnings) =
         match noirc_driver::compile_contract(&mut context, crate_id, compile_options) {
             Ok(contracts_and_warnings) => contracts_and_warnings,

tooling/nargo_cli/src/cli/test_cmd.rs

@@ -82,7 +82,8 @@ fn run_tests<S: BlackBoxFunctionSolver>(
     show_output: bool,
     compile_options: &CompileOptions,
 ) -> Result<(), CliError> {
-    let (mut context, crate_id) = prepare_package(package);
+    let (mut context, crate_id) =
+        prepare_package(package, Box::new(|path| std::fs::read_to_string(path)));
     check_crate_and_report_errors(&mut context, crate_id, compile_options.deny_warnings)?;
 
     let test_functions = context.get_all_test_functions_in_crate_matching(&crate_id, test_name);