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denoland-deno/cli/state.rs
Bert Belder abe8a113ad Refactor error to use dynamic dispatch and traits
This is in preperation for dynamic import (#1789), which is more easily
implemented when errors are dynamic.
2019-07-11 14:37:00 -04:00

394 lines
11 KiB
Rust

// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::compiler::compile_async;
use crate::compiler::ModuleMetaData;
use crate::deno_dir;
use crate::flags;
use crate::global_timer::GlobalTimer;
use crate::import_map::ImportMap;
use crate::msg;
use crate::ops;
use crate::permissions::DenoPermissions;
use crate::progress::Progress;
use crate::resources;
use crate::resources::ResourceId;
use crate::worker::Worker;
use deno::Buf;
use deno::CoreOp;
use deno::ErrBox;
use deno::Loader;
use deno::ModuleSpecifier;
use deno::PinnedBuf;
use futures::future::Either;
use futures::future::Shared;
use futures::Future;
use rand::rngs::StdRng;
use rand::SeedableRng;
use std;
use std::collections::HashMap;
use std::collections::HashSet;
use std::env;
use std::fs;
use std::ops::Deref;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use std::sync::Mutex;
use std::time::Instant;
use tokio::sync::mpsc as async_mpsc;
pub type WorkerSender = async_mpsc::Sender<Buf>;
pub type WorkerReceiver = async_mpsc::Receiver<Buf>;
pub type WorkerChannels = (WorkerSender, WorkerReceiver);
pub type UserWorkerTable = HashMap<ResourceId, Shared<Worker>>;
#[derive(Default)]
pub struct Metrics {
pub ops_dispatched: AtomicUsize,
pub ops_completed: AtomicUsize,
pub bytes_sent_control: AtomicUsize,
pub bytes_sent_data: AtomicUsize,
pub bytes_received: AtomicUsize,
pub resolve_count: AtomicUsize,
pub compiler_starts: AtomicUsize,
}
/// Isolate cannot be passed between threads but ThreadSafeState can.
/// ThreadSafeState satisfies Send and Sync. So any state that needs to be
/// accessed outside the main V8 thread should be inside ThreadSafeState.
pub struct ThreadSafeState(Arc<State>);
#[cfg_attr(feature = "cargo-clippy", allow(stutter))]
pub struct State {
pub modules: Arc<Mutex<deno::Modules>>,
pub main_module: Option<ModuleSpecifier>,
pub dir: deno_dir::DenoDir,
pub argv: Vec<String>,
pub permissions: DenoPermissions,
pub flags: flags::DenoFlags,
/// When flags contains a `.config_path` option, the content of the
/// configuration file will be resolved and set.
pub config: Option<Vec<u8>>,
/// When flags contains a `.config_path` option, the fully qualified path
/// name of the passed path will be resolved and set.
pub config_path: Option<String>,
/// When flags contains a `.import_map_path` option, the content of the
/// import map file will be resolved and set.
pub import_map: Option<ImportMap>,
pub metrics: Metrics,
pub worker_channels: Mutex<WorkerChannels>,
pub global_timer: Mutex<GlobalTimer>,
pub workers: Mutex<UserWorkerTable>,
pub start_time: Instant,
/// A reference to this worker's resource.
pub resource: resources::Resource,
pub dispatch_selector: ops::OpSelector,
/// Reference to global progress bar.
pub progress: Progress,
pub seeded_rng: Option<Mutex<StdRng>>,
/// Set of all URLs that have been compiled. This is a hacky way to work
/// around the fact that --reload will force multiple compilations of the same
/// module.
compiled: Mutex<HashSet<String>>,
}
impl Clone for ThreadSafeState {
fn clone(&self) -> Self {
ThreadSafeState(self.0.clone())
}
}
impl Deref for ThreadSafeState {
type Target = Arc<State>;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl ThreadSafeState {
pub fn dispatch(
&self,
control: &[u8],
zero_copy: Option<PinnedBuf>,
) -> CoreOp {
ops::dispatch_all(self, control, zero_copy, self.dispatch_selector)
}
}
pub fn fetch_module_meta_data_and_maybe_compile_async(
state: &ThreadSafeState,
module_specifier: &ModuleSpecifier,
) -> impl Future<Item = ModuleMetaData, Error = ErrBox> {
let state_ = state.clone();
let use_cache =
!state_.flags.reload || state_.has_compiled(&module_specifier.to_string());
let no_fetch = state_.flags.no_fetch;
state_
.dir
.fetch_module_meta_data_async(&module_specifier, use_cache, no_fetch)
.and_then(move |out| {
if out.media_type == msg::MediaType::TypeScript
&& !out.has_output_code_and_source_map()
{
debug!(">>>>> compile_sync START");
Either::A(
compile_async(state_.clone(), &out)
.map_err(|e| {
debug!("compiler error exiting!");
eprintln!("\n{}", e.to_string());
std::process::exit(1);
}).and_then(move |out| {
debug!(">>>>> compile_sync END");
Ok(out)
}),
)
} else {
Either::B(futures::future::ok(out))
}
})
}
impl Loader for ThreadSafeState {
fn resolve(
&self,
specifier: &str,
referrer: &str,
is_root: bool,
) -> Result<ModuleSpecifier, ErrBox> {
if !is_root {
if let Some(import_map) = &self.import_map {
let result = import_map.resolve(specifier, referrer)?;
if result.is_some() {
return Ok(result.unwrap());
}
}
}
ModuleSpecifier::resolve_import(specifier, referrer).map_err(ErrBox::from)
}
/// Given an absolute url, load its source code.
fn load(
&self,
module_specifier: &ModuleSpecifier,
) -> Box<deno::SourceCodeInfoFuture> {
self.metrics.resolve_count.fetch_add(1, Ordering::SeqCst);
Box::new(
fetch_module_meta_data_and_maybe_compile_async(self, module_specifier)
.map(|module_meta_data| deno::SourceCodeInfo {
// Real module name, might be different from initial URL
// due to redirections.
code: module_meta_data.js_source(),
module_name: module_meta_data.module_name,
}),
)
}
}
impl ThreadSafeState {
pub fn new(
flags: flags::DenoFlags,
argv_rest: Vec<String>,
dispatch_selector: ops::OpSelector,
progress: Progress,
) -> Self {
let custom_root = env::var("DENO_DIR").map(String::into).ok();
let (worker_in_tx, worker_in_rx) = async_mpsc::channel::<Buf>(1);
let (worker_out_tx, worker_out_rx) = async_mpsc::channel::<Buf>(1);
let internal_channels = (worker_out_tx, worker_in_rx);
let external_channels = (worker_in_tx, worker_out_rx);
let resource = resources::add_worker(external_channels);
// take the passed flag and resolve the file name relative to the cwd
let config_file = match &flags.config_path {
Some(config_file_name) => {
debug!("Compiler config file: {}", config_file_name);
let cwd = std::env::current_dir().unwrap();
Some(cwd.join(config_file_name))
}
_ => None,
};
// Convert the PathBuf to a canonicalized string. This is needed by the
// compiler to properly deal with the configuration.
let config_path = match &config_file {
Some(config_file) => Some(
config_file
.canonicalize()
.unwrap()
.to_str()
.unwrap()
.to_owned(),
),
_ => None,
};
// Load the contents of the configuration file
let config = match &config_file {
Some(config_file) => {
debug!("Attempt to load config: {}", config_file.to_str().unwrap());
match fs::read(&config_file) {
Ok(config_data) => Some(config_data.to_owned()),
_ => panic!(
"Error retrieving compiler config file at \"{}\"",
config_file.to_str().unwrap()
),
}
}
_ => None,
};
let dir =
deno_dir::DenoDir::new(custom_root, &config, progress.clone()).unwrap();
let main_module: Option<ModuleSpecifier> = if argv_rest.len() <= 1 {
None
} else {
let root_specifier = argv_rest[1].clone();
match ModuleSpecifier::resolve_url_or_path(&root_specifier) {
Ok(specifier) => Some(specifier),
Err(e) => {
// TODO: handle unresolvable specifier
panic!("Unable to resolve root specifier: {:?}", e);
}
}
};
let mut import_map = None;
if let Some(file_name) = &flags.import_map_path {
let base_url = match &main_module {
Some(module_specifier) => module_specifier.clone(),
None => unreachable!(),
};
match ImportMap::load(&base_url.to_string(), file_name) {
Ok(map) => import_map = Some(map),
Err(err) => {
println!("{:?}", err);
panic!("Error parsing import map");
}
}
}
let mut seeded_rng = None;
if let Some(seed) = flags.seed {
seeded_rng = Some(Mutex::new(StdRng::seed_from_u64(seed)));
};
let modules = Arc::new(Mutex::new(deno::Modules::new()));
ThreadSafeState(Arc::new(State {
main_module,
modules,
dir,
argv: argv_rest,
permissions: DenoPermissions::from_flags(&flags),
flags,
config,
config_path,
import_map,
metrics: Metrics::default(),
worker_channels: Mutex::new(internal_channels),
global_timer: Mutex::new(GlobalTimer::new()),
workers: Mutex::new(UserWorkerTable::new()),
start_time: Instant::now(),
resource,
dispatch_selector,
progress,
seeded_rng,
compiled: Mutex::new(HashSet::new()),
}))
}
/// Read main module from argv
pub fn main_module(&self) -> Option<ModuleSpecifier> {
match &self.main_module {
Some(module_specifier) => Some(module_specifier.clone()),
None => None,
}
}
pub fn mark_compiled(&self, module_id: &str) {
let mut c = self.compiled.lock().unwrap();
c.insert(module_id.to_string());
}
pub fn has_compiled(&self, module_id: &str) -> bool {
let c = self.compiled.lock().unwrap();
c.contains(module_id)
}
#[inline]
pub fn check_read(&self, filename: &str) -> Result<(), ErrBox> {
self.permissions.check_read(filename)
}
#[inline]
pub fn check_write(&self, filename: &str) -> Result<(), ErrBox> {
self.permissions.check_write(filename)
}
#[inline]
pub fn check_env(&self) -> Result<(), ErrBox> {
self.permissions.check_env()
}
#[inline]
pub fn check_net(&self, host_and_port: &str) -> Result<(), ErrBox> {
self.permissions.check_net(host_and_port)
}
#[inline]
pub fn check_net_url(&self, url: url::Url) -> Result<(), ErrBox> {
self.permissions.check_net_url(url)
}
#[inline]
pub fn check_run(&self) -> Result<(), ErrBox> {
self.permissions.check_run()
}
#[cfg(test)]
pub fn mock(argv: Vec<String>) -> ThreadSafeState {
ThreadSafeState::new(
flags::DenoFlags::default(),
argv,
ops::op_selector_std,
Progress::new(),
)
}
pub fn metrics_op_dispatched(
&self,
bytes_sent_control: usize,
bytes_sent_data: usize,
) {
self.metrics.ops_dispatched.fetch_add(1, Ordering::SeqCst);
self
.metrics
.bytes_sent_control
.fetch_add(bytes_sent_control, Ordering::SeqCst);
self
.metrics
.bytes_sent_data
.fetch_add(bytes_sent_data, Ordering::SeqCst);
}
pub fn metrics_op_completed(&self, bytes_received: usize) {
self.metrics.ops_completed.fetch_add(1, Ordering::SeqCst);
self
.metrics
.bytes_received
.fetch_add(bytes_received, Ordering::SeqCst);
}
}
#[test]
fn thread_safe() {
fn f<S: Send + Sync>(_: S) {}
f(ThreadSafeState::mock(vec![
String::from("./deno"),
String::from("hello.js"),
]));
}