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use std::cell::RefCell;
use std::io::Read;
use std::rc::Rc;
use crate::tools::test::TestEvent;
use crate::tools::test::TestOutput;
use deno_core::error::generic_error;
use deno_core::error::AnyError;
use deno_core::op;
use deno_core::Extension;
use deno_core::ModuleSpecifier;
use deno_core::OpState;
use deno_runtime::ops::io::StdFileResource;
use deno_runtime::permissions::create_child_permissions;
use deno_runtime::permissions::ChildPermissionsArg;
use deno_runtime::permissions::Permissions;
use tokio::sync::mpsc::UnboundedSender;
use uuid::Uuid;
pub fn init(
sender: UnboundedSender<TestEvent>,
stdout_writer: os_pipe::PipeWriter,
stderr_writer: os_pipe::PipeWriter,
) -> Extension {
// todo(dsheret): don't do this? Taking out the writers was necessary to prevent invalid handle panics
let stdout_writer = Rc::new(RefCell::new(Some(stdout_writer)));
let stderr_writer = Rc::new(RefCell::new(Some(stderr_writer)));
Extension::builder()
.ops(vec![
op_pledge_test_permissions::decl(),
op_restore_test_permissions::decl(),
op_get_test_origin::decl(),
op_dispatch_test_event::decl(),
])
.middleware(|op| match op.name {
"op_print" => op_print::decl(),
_ => op,
})
.state(move |state| {
state.resource_table.replace(
1,
StdFileResource::stdio(
&pipe_writer_to_file(&stdout_writer.borrow_mut().take().unwrap()),
"stdout",
),
);
state.resource_table.replace(
2,
StdFileResource::stdio(
&pipe_writer_to_file(&stderr_writer.borrow_mut().take().unwrap()),
"stderr",
),
);
state.put(sender.clone());
Ok(())
})
.build()
}
#[cfg(windows)]
fn pipe_writer_to_file(writer: &os_pipe::PipeWriter) -> std::fs::File {
use std::os::windows::prelude::AsRawHandle;
use std::os::windows::prelude::FromRawHandle;
unsafe { std::fs::File::from_raw_handle(writer.as_raw_handle()) }
}
#[cfg(unix)]
fn pipe_writer_to_file(writer: &os_pipe::PipeWriter) -> std::fs::File {
use std::os::unix::io::AsRawFd;
use std::os::unix::io::FromRawFd;
unsafe { std::fs::File::from_raw_fd(writer.as_raw_fd()) }
}
/// Creates the stdout and stderr pipes and returns the writers for stdout and stderr.
pub fn create_stdout_stderr_pipes(
sender: UnboundedSender<TestEvent>,
) -> (os_pipe::PipeWriter, os_pipe::PipeWriter) {
let (stdout_reader, stdout_writer) = os_pipe::pipe().unwrap();
let (stderr_reader, stderr_writer) = os_pipe::pipe().unwrap();
start_output_redirect_thread(stdout_reader, sender.clone(), |bytes| {
TestOutput::Stdout(bytes)
});
start_output_redirect_thread(stderr_reader, sender, |bytes| {
TestOutput::Stderr(bytes)
});
(stdout_writer, stderr_writer)
}
fn start_output_redirect_thread(
mut pipe_reader: os_pipe::PipeReader,
sender: UnboundedSender<TestEvent>,
map_test_output: impl Fn(Vec<u8>) -> TestOutput + Send + 'static,
) {
tokio::task::spawn_blocking(move || loop {
let mut buffer = [0; 512];
let size = match pipe_reader.read(&mut buffer) {
Ok(0) | Err(_) => break,
Ok(size) => size,
};
if sender
.send(TestEvent::Output(map_test_output(buffer[0..size].to_vec())))
.is_err()
{
break;
}
});
}
#[derive(Clone)]
struct PermissionsHolder(Uuid, Permissions);
#[op]
pub fn op_pledge_test_permissions(
state: &mut OpState,
args: ChildPermissionsArg,
) -> Result<Uuid, AnyError> {
let token = Uuid::new_v4();
let parent_permissions = state.borrow_mut::<Permissions>();
let worker_permissions = create_child_permissions(parent_permissions, args)?;
let parent_permissions = parent_permissions.clone();
state.put::<PermissionsHolder>(PermissionsHolder(token, parent_permissions));
// NOTE: This call overrides current permission set for the worker
state.put::<Permissions>(worker_permissions);
Ok(token)
}
#[op]
pub fn op_restore_test_permissions(
state: &mut OpState,
token: Uuid,
) -> Result<(), AnyError> {
if let Some(permissions_holder) = state.try_take::<PermissionsHolder>() {
if token != permissions_holder.0 {
panic!("restore test permissions token does not match the stored token");
}
let permissions = permissions_holder.1;
state.put::<Permissions>(permissions);
Ok(())
} else {
Err(generic_error("no permissions to restore"))
}
}
#[op]
fn op_get_test_origin(state: &mut OpState) -> Result<String, AnyError> {
Ok(state.borrow::<ModuleSpecifier>().to_string())
}
#[op]
fn op_dispatch_test_event(
state: &mut OpState,
event: TestEvent,
) -> Result<(), AnyError> {
let sender = state.borrow::<UnboundedSender<TestEvent>>().clone();
sender.send(event).ok();
Ok(())
}
#[op]
pub fn op_print(
state: &mut OpState,
msg: String,
is_err: bool,
) -> Result<(), AnyError> {
let sender = state.borrow::<UnboundedSender<TestEvent>>().clone();
let msg = if is_err {
TestOutput::PrintStderr(msg)
} else {
TestOutput::PrintStdout(msg)
};
sender.send(TestEvent::Output(msg)).ok();
Ok(())
}
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