feat: Add initial in-memory filesystem for wasm build

Author: SersemPeca

src/db-backend/Cargo.lock

@@ -47,6 +47,8 @@ web-sys = { version = "0.3", optional = true, features = [
   "DedicatedWorkerGlobalScope", "WorkerGlobalScope", "console", "MessageEvent",
   "Worker", "Window" ] }
 
+vfs = "0.12"
+
 expanduser = { version = "1.2.2", optional = true}
 
 [lib]
@@ -69,13 +71,10 @@ name = "schema-generator"
 path = "src/bin/schema_generator.rs"
 required-features = ["io-transport"]
 
-# CPPFLAGS_wasm32_unknown_unknown = "--target=wasm32 --sysroot={cwd}/wasm-sysroot -isystem {cwd}/wasm-sysroot/include"
-# CFLAGS_wasm32_unknown_unknown = "-I{cwd}/wasm-sysroot/include -DNDEBUG -Wbad-function-cast -Wcast-function-type -fno-builtin"
-
 [features]
 debugging = []
 
-default = ["io-transport"]
+default = ["browser-transport"]
 
 io-transport = ["dep:expanduser"]
 browser-transport = ["dep:serde-wasm-bindgen", "dep:wasm-bindgen",

src/db-backend/Cargo.toml

@@ -14,4 +14,4 @@ cargo clean
 # build (just your crate, or the specific package)
 cargo build --target wasm32-unknown-unknown --release --no-default-features --features browser-transport
 
-wasm-pack build --target web --release -- --no-default-features --features browser-transport
+wasm-pack build --target web --release -d ./wasm-testing/pkg -- --no-default-features --features browser-transport

src/db-backend/build_wasm.sh

@@ -116,7 +116,6 @@ pub fn run(socket_path: &PathBuf) -> Result<(), Box<dyn Error>> {
 //     handle_client(&mut reader, &mut writer)
 // }
 
-#[cfg(feature = "io-transport")]
 fn launch(trace_folder: &Path, trace_file: &Path, seq: i64) -> Result<Handler, Box<dyn Error>> {
     info!("run launch() for {:?}", trace_folder);
     let trace_file_format = if trace_file.extension() == Some(std::ffi::OsStr::new("json")) {
@@ -147,11 +146,6 @@ fn launch(trace_folder: &Path, trace_file: &Path, seq: i64) -> Result<Handler, B
     }
 }
 
-#[cfg(feature = "browser-transport")]
-fn launch(trace_folder: &Path, trace_file: &Path, seq: i64) -> Result<Handler, Box<dyn Error>> {
-    todo!()
-}
-
 fn write_dap_messages<T: DapTransport>(
     transport: &mut T,
     handler: &mut Handler,

src/db-backend/src/dap_server.rs

@@ -17,6 +17,9 @@ use crate::dap::setup_onmessage_callback;
 #[cfg(feature = "browser-transport")]
 pub mod c_compat;
 
+#[cfg(feature = "browser-transport")]
+pub mod vfs;
+
 pub mod calltrace;
 
 #[cfg(feature = "io-transport")]

src/db-backend/src/lib.rs

@@ -1,5 +1,6 @@
 #[cfg(feature = "io-transport")]
 use expanduser::expanduser;
+use vfs::VfsPath;
 
 use std::collections::HashMap;
 use std::error::Error;
@@ -14,6 +15,7 @@ use runtime_tracing::{
 
 use crate::db::{CellChange, Db, DbCall, DbRecordEvent, DbStep, EndOfProgram};
 // use crate::task::{Comp}
+//
 
 #[derive(Debug, Clone, Copy)]
 struct CompoundValueInfo {
@@ -418,7 +420,7 @@ impl<'a> TraceProcessor<'a> {
     }
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(feature = "io-transport")]
 #[allow(clippy::panic)]
 pub fn load_trace_data(
     trace_file: &Path,
@@ -431,16 +433,20 @@ pub fn load_trace_data(
     Ok(trace_events)
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(feature = "browser-transport")]
 #[allow(clippy::panic)]
 pub fn load_trace_data(
     trace_file: &Path,
     file_format: runtime_tracing::TraceEventsFileFormat,
 ) -> Result<Vec<TraceLowLevelEvent>, Box<dyn Error>> {
-    todo!()
+    use crate::vfs::{load_trace_data_vfs, trace_vfs_root};
+
+    let path_str = trace_file.to_str().unwrap();
+
+    load_trace_data_vfs(trace_vfs_root(), path_str, file_format)
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(feature = "io-transport")]
 #[allow(clippy::panic)]
 pub fn load_trace_metadata(trace_metadata_file: &Path) -> Result<TraceMetadata, Box<dyn Error>> {
     // copied and adapted from https://stackoverflow.com/a/70926549/438099
@@ -453,8 +459,12 @@ pub fn load_trace_metadata(trace_metadata_file: &Path) -> Result<TraceMetadata,
     Ok(trace_metadata)
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(feature = "browser-transport")]
 #[allow(clippy::panic)]
 pub fn load_trace_metadata(trace_metadata_file: &Path) -> Result<TraceMetadata, Box<dyn Error>> {
-    todo!()
+    use crate::vfs::{load_trace_metadata_vfs, trace_vfs_root};
+
+    let path_str = trace_metadata_file.to_str().unwrap();
+
+    load_trace_metadata_vfs(trace_vfs_root(), path_str)
 }