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ts.rs
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ts.rs
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::compilers::CompiledModule;
use crate::compilers::CompiledModuleFuture;
use crate::diagnostics::Diagnostic;
use crate::disk_cache::DiskCache;
use crate::file_fetcher::SourceFile;
use crate::file_fetcher::SourceFileFetcher;
use crate::global_state::ThreadSafeGlobalState;
use crate::msg;
use crate::source_maps::SourceMapGetter;
use crate::startup_data;
use crate::state::*;
use crate::version;
use crate::worker::Worker;
use deno::Buf;
use deno::ErrBox;
use deno::ModuleSpecifier;
use futures::future::FutureExt;
use futures::Future;
use regex::Regex;
use std::collections::HashSet;
use std::fs;
use std::io;
use std::path::PathBuf;
use std::pin::Pin;
use std::str;
use std::sync::atomic::Ordering;
use std::sync::Mutex;
use url::Url;
lazy_static! {
static ref CHECK_JS_RE: Regex =
Regex::new(r#""checkJs"\s*?:\s*?true"#).unwrap();
}
/// Struct which represents the state of the compiler
/// configuration where the first is canonical name for the configuration file,
/// second is a vector of the bytes of the contents of the configuration file,
/// third is bytes of the hash of contents.
#[derive(Clone)]
pub struct CompilerConfig {
pub path: Option<PathBuf>,
pub content: Option<Vec<u8>>,
pub hash: Vec<u8>,
pub compile_js: bool,
}
impl CompilerConfig {
/// Take the passed flag and resolve the file name relative to the cwd.
pub fn load(config_path: Option<String>) -> Result<Self, ErrBox> {
let config_file = match &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().map_err(|_| {
io::Error::new(
io::ErrorKind::InvalidInput,
format!(
"Could not find the config file: {}",
config_file.to_string_lossy()
),
)
})),
_ => 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());
let config = fs::read(&config_file)?;
Some(config)
}
_ => None,
};
let config_hash = match &config {
Some(bytes) => bytes.clone(),
_ => b"".to_vec(),
};
// If `checkJs` is set to true in `compilerOptions` then we're gonna be compiling
// JavaScript files as well
let compile_js = if let Some(config_content) = config.clone() {
let config_str = std::str::from_utf8(&config_content)?;
CHECK_JS_RE.is_match(config_str)
} else {
false
};
let ts_config = Self {
path: config_path.unwrap_or_else(|| Ok(PathBuf::new())).ok(),
content: config,
hash: config_hash,
compile_js,
};
Ok(ts_config)
}
}
/// Information associated with compiled file in cache.
/// Includes source code path and state hash.
/// version_hash is used to validate versions of the file
/// and could be used to remove stale file in cache.
pub struct CompiledFileMetadata {
pub source_path: PathBuf,
pub version_hash: String,
}
static SOURCE_PATH: &str = "source_path";
static VERSION_HASH: &str = "version_hash";
impl CompiledFileMetadata {
pub fn from_json_string(metadata_string: String) -> Option<Self> {
// TODO: use serde for deserialization
let maybe_metadata_json: serde_json::Result<serde_json::Value> =
serde_json::from_str(&metadata_string);
if let Ok(metadata_json) = maybe_metadata_json {
let source_path = metadata_json[SOURCE_PATH].as_str().map(PathBuf::from);
let version_hash = metadata_json[VERSION_HASH].as_str().map(String::from);
if source_path.is_none() || version_hash.is_none() {
return None;
}
return Some(CompiledFileMetadata {
source_path: source_path.unwrap(),
version_hash: version_hash.unwrap(),
});
}
None
}
pub fn to_json_string(self: &Self) -> Result<String, serde_json::Error> {
let mut value_map = serde_json::map::Map::new();
value_map.insert(SOURCE_PATH.to_owned(), json!(&self.source_path));
value_map.insert(VERSION_HASH.to_string(), json!(&self.version_hash));
serde_json::to_string(&value_map)
}
}
/// Creates the JSON message send to compiler.ts's onmessage.
fn req(
request_type: msg::CompilerRequestType,
root_names: Vec<String>,
compiler_config: CompilerConfig,
out_file: Option<String>,
) -> Buf {
let j = match (compiler_config.path, compiler_config.content) {
(Some(config_path), Some(config_data)) => json!({
"type": request_type as i32,
"rootNames": root_names,
"outFile": out_file,
"configPath": config_path,
"config": str::from_utf8(&config_data).unwrap(),
}),
_ => json!({
"type": request_type as i32,
"rootNames": root_names,
"outFile": out_file,
}),
};
j.to_string().into_boxed_str().into_boxed_bytes()
}
/// Emit a SHA256 hash based on source code, deno version and TS config.
/// Used to check if a recompilation for source code is needed.
pub fn source_code_version_hash(
source_code: &[u8],
version: &str,
config_hash: &[u8],
) -> String {
crate::checksum::gen(vec![source_code, version.as_bytes(), config_hash])
}
pub struct TsCompiler {
pub file_fetcher: SourceFileFetcher,
pub config: CompilerConfig,
pub disk_cache: DiskCache,
/// Set of all URLs that have been compiled. This prevents double
/// compilation of module.
pub compiled: Mutex<HashSet<Url>>,
/// This setting is controlled by `--reload` flag. Unless the flag
/// is provided disk cache is used.
pub use_disk_cache: bool,
/// This setting is controlled by `compilerOptions.checkJs`
pub compile_js: bool,
}
impl TsCompiler {
pub fn new(
file_fetcher: SourceFileFetcher,
disk_cache: DiskCache,
use_disk_cache: bool,
config_path: Option<String>,
) -> Result<Self, ErrBox> {
let config = CompilerConfig::load(config_path)?;
let compiler = Self {
file_fetcher,
disk_cache,
compile_js: config.compile_js,
config,
compiled: Mutex::new(HashSet::new()),
use_disk_cache,
};
Ok(compiler)
}
/// Create a new V8 worker with snapshot of TS compiler and setup compiler's runtime.
fn setup_worker(global_state: ThreadSafeGlobalState) -> Worker {
let (int, ext) = ThreadSafeState::create_channels();
let worker_state =
ThreadSafeState::new(global_state.clone(), None, None, true, int)
.expect("Unable to create worker state");
// Count how many times we start the compiler worker.
global_state
.metrics
.compiler_starts
.fetch_add(1, Ordering::SeqCst);
let mut worker = Worker::new(
"TS".to_string(),
startup_data::compiler_isolate_init(),
worker_state,
ext,
);
worker.execute("denoMain()").unwrap();
worker.execute("workerMain()").unwrap();
worker.execute("compilerMain()").unwrap();
worker
}
pub fn bundle_async(
self: &Self,
global_state: ThreadSafeGlobalState,
module_name: String,
out_file: Option<String>,
) -> impl Future<Output = Result<(), ErrBox>> {
debug!(
"Invoking the compiler to bundle. module_name: {}",
module_name
);
let root_names = vec![module_name];
let req_msg = req(
msg::CompilerRequestType::Bundle,
root_names,
self.config.clone(),
out_file,
);
let worker = TsCompiler::setup_worker(global_state);
let worker_ = worker.clone();
async move {
worker.post_message(req_msg).await?;
worker.await?;
debug!("Sent message to worker");
let maybe_msg = worker_.get_message().await?;
debug!("Received message from worker");
if let Some(msg) = maybe_msg {
let json_str = std::str::from_utf8(&msg).unwrap();
debug!("Message: {}", json_str);
if let Some(diagnostics) = Diagnostic::from_emit_result(json_str) {
return Err(ErrBox::from(diagnostics));
}
}
Ok(())
}
}
/// Mark given module URL as compiled to avoid multiple compilations of same module
/// in single run.
fn mark_compiled(&self, url: &Url) {
let mut c = self.compiled.lock().unwrap();
c.insert(url.clone());
}
/// Check if given module URL has already been compiled and can be fetched directly from disk.
fn has_compiled(&self, url: &Url) -> bool {
let c = self.compiled.lock().unwrap();
c.contains(url)
}
/// Asynchronously compile module and all it's dependencies.
///
/// This method compiled every module at most once.
///
/// If `--reload` flag was provided then compiler will not on-disk cache and force recompilation.
///
/// If compilation is required then new V8 worker is spawned with fresh TS compiler.
pub fn compile_async(
self: &Self,
global_state: ThreadSafeGlobalState,
source_file: &SourceFile,
) -> Pin<Box<CompiledModuleFuture>> {
if self.has_compiled(&source_file.url) {
return match self.get_compiled_module(&source_file.url) {
Ok(compiled) => futures::future::ok(compiled).boxed(),
Err(err) => futures::future::err(err).boxed(),
};
}
if self.use_disk_cache {
// Try to load cached version:
// 1. check if there's 'meta' file
if let Some(metadata) = self.get_metadata(&source_file.url) {
// 2. compare version hashes
// TODO: it would probably be good idea to make it method implemented on SourceFile
let version_hash_to_validate = source_code_version_hash(
&source_file.source_code,
version::DENO,
&self.config.hash,
);
if metadata.version_hash == version_hash_to_validate {
debug!("load_cache metadata version hash match");
if let Ok(compiled_module) =
self.get_compiled_module(&source_file.url)
{
self.mark_compiled(&source_file.url);
return futures::future::ok(compiled_module).boxed();
}
}
}
}
let source_file_ = source_file.clone();
debug!(">>>>> compile_sync START");
let module_url = source_file.url.clone();
debug!(
"Running rust part of compile_sync, module specifier: {}",
&source_file.url
);
let root_names = vec![module_url.to_string()];
let req_msg = req(
msg::CompilerRequestType::Compile,
root_names,
self.config.clone(),
None,
);
let worker = TsCompiler::setup_worker(global_state.clone());
let worker_ = worker.clone();
let compiling_job = global_state
.progress
.add("Compile", &module_url.to_string());
let global_state_ = global_state;
async move {
worker.post_message(req_msg).await?;
worker.await?;
debug!("Sent message to worker");
let maybe_msg = worker_.get_message().await?;
if let Some(msg) = maybe_msg {
let json_str = std::str::from_utf8(&msg).unwrap();
debug!("Message: {}", json_str);
if let Some(diagnostics) = Diagnostic::from_emit_result(json_str) {
return Err(ErrBox::from(diagnostics));
}
}
let compiled_module = global_state_
.ts_compiler
.get_compiled_module(&source_file_.url)
.expect("Expected to find compiled file");
drop(compiling_job);
debug!(">>>>> compile_sync END");
Ok(compiled_module)
}
.boxed()
}
/// Get associated `CompiledFileMetadata` for given module if it exists.
pub fn get_metadata(self: &Self, url: &Url) -> Option<CompiledFileMetadata> {
// Try to load cached version:
// 1. check if there's 'meta' file
let cache_key = self
.disk_cache
.get_cache_filename_with_extension(url, "meta");
if let Ok(metadata_bytes) = self.disk_cache.get(&cache_key) {
if let Ok(metadata) = std::str::from_utf8(&metadata_bytes) {
if let Some(read_metadata) =
CompiledFileMetadata::from_json_string(metadata.to_string())
{
return Some(read_metadata);
}
}
}
None
}
pub fn get_compiled_module(
self: &Self,
module_url: &Url,
) -> Result<CompiledModule, ErrBox> {
let compiled_source_file = self.get_compiled_source_file(module_url)?;
let compiled_module = CompiledModule {
code: str::from_utf8(&compiled_source_file.source_code)
.unwrap()
.to_string(),
name: module_url.to_string(),
};
Ok(compiled_module)
}
/// Return compiled JS file for given TS module.
// TODO: ideally we shouldn't construct SourceFile by hand, but it should be delegated to
// SourceFileFetcher
pub fn get_compiled_source_file(
self: &Self,
module_url: &Url,
) -> Result<SourceFile, ErrBox> {
let cache_key = self
.disk_cache
.get_cache_filename_with_extension(&module_url, "js");
let compiled_code = self.disk_cache.get(&cache_key)?;
let compiled_code_filename = self.disk_cache.location.join(cache_key);
debug!("compiled filename: {:?}", compiled_code_filename);
let compiled_module = SourceFile {
url: module_url.clone(),
filename: compiled_code_filename,
media_type: msg::MediaType::JavaScript,
source_code: compiled_code,
};
Ok(compiled_module)
}
/// Save compiled JS file for given TS module to on-disk cache.
///
/// Along compiled file a special metadata file is saved as well containing
/// hash that can be validated to avoid unnecessary recompilation.
fn cache_compiled_file(
self: &Self,
module_specifier: &ModuleSpecifier,
contents: &str,
) -> std::io::Result<()> {
let js_key = self
.disk_cache
.get_cache_filename_with_extension(module_specifier.as_url(), "js");
self
.disk_cache
.set(&js_key, contents.as_bytes())
.and_then(|_| {
self.mark_compiled(module_specifier.as_url());
let source_file = self
.file_fetcher
.fetch_cached_source_file(&module_specifier)
.expect("Source file not found");
let version_hash = source_code_version_hash(
&source_file.source_code,
version::DENO,
&self.config.hash,
);
let compiled_file_metadata = CompiledFileMetadata {
source_path: source_file.filename,
version_hash,
};
let meta_key = self
.disk_cache
.get_cache_filename_with_extension(module_specifier.as_url(), "meta");
self.disk_cache.set(
&meta_key,
compiled_file_metadata.to_json_string()?.as_bytes(),
)
})
}
/// Return associated source map file for given TS module.
// TODO: ideally we shouldn't construct SourceFile by hand, but it should be delegated to
// SourceFileFetcher
pub fn get_source_map_file(
self: &Self,
module_specifier: &ModuleSpecifier,
) -> Result<SourceFile, ErrBox> {
let cache_key = self
.disk_cache
.get_cache_filename_with_extension(module_specifier.as_url(), "js.map");
let source_code = self.disk_cache.get(&cache_key)?;
let source_map_filename = self.disk_cache.location.join(cache_key);
debug!("source map filename: {:?}", source_map_filename);
let source_map_file = SourceFile {
url: module_specifier.as_url().to_owned(),
filename: source_map_filename,
media_type: msg::MediaType::JavaScript,
source_code,
};
Ok(source_map_file)
}
/// Save source map file for given TS module to on-disk cache.
fn cache_source_map(
self: &Self,
module_specifier: &ModuleSpecifier,
contents: &str,
) -> std::io::Result<()> {
let source_map_key = self
.disk_cache
.get_cache_filename_with_extension(module_specifier.as_url(), "js.map");
self.disk_cache.set(&source_map_key, contents.as_bytes())
}
/// This method is called by TS compiler via an "op".
pub fn cache_compiler_output(
self: &Self,
module_specifier: &ModuleSpecifier,
extension: &str,
contents: &str,
) -> std::io::Result<()> {
match extension {
".map" => self.cache_source_map(module_specifier, contents),
".js" => self.cache_compiled_file(module_specifier, contents),
_ => unreachable!(),
}
}
}
impl SourceMapGetter for TsCompiler {
fn get_source_map(&self, script_name: &str) -> Option<Vec<u8>> {
self
.try_to_resolve_and_get_source_map(script_name)
.map(|out| out.source_code)
}
fn get_source_line(&self, script_name: &str, line: usize) -> Option<String> {
self
.try_resolve_and_get_source_file(script_name)
.and_then(|out| {
str::from_utf8(&out.source_code).ok().and_then(|v| {
let lines: Vec<&str> = v.lines().collect();
assert!(lines.len() > line);
Some(lines[line].to_string())
})
})
}
}
// `SourceMapGetter` related methods
impl TsCompiler {
fn try_to_resolve(self: &Self, script_name: &str) -> Option<ModuleSpecifier> {
// if `script_name` can't be resolved to ModuleSpecifier it's probably internal
// script (like `gen/cli/bundle/compiler.js`) so we won't be
// able to get source for it anyway
ModuleSpecifier::resolve_url(script_name).ok()
}
fn try_resolve_and_get_source_file(
&self,
script_name: &str,
) -> Option<SourceFile> {
if let Some(module_specifier) = self.try_to_resolve(script_name) {
return self
.file_fetcher
.fetch_cached_source_file(&module_specifier);
}
None
}
fn try_to_resolve_and_get_source_map(
&self,
script_name: &str,
) -> Option<SourceFile> {
if let Some(module_specifier) = self.try_to_resolve(script_name) {
return match self.get_source_map_file(&module_specifier) {
Ok(out) => Some(out),
Err(_) => None,
};
}
None
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::fs as deno_fs;
use crate::tokio_util;
use deno::ModuleSpecifier;
use std::path::PathBuf;
use tempfile::TempDir;
#[test]
fn test_compile_async() {
let p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("tests/002_hello.ts");
let specifier =
ModuleSpecifier::resolve_url_or_path(p.to_str().unwrap()).unwrap();
let out = SourceFile {
url: specifier.as_url().clone(),
filename: PathBuf::from(p.to_str().unwrap().to_string()),
media_type: msg::MediaType::TypeScript,
source_code: include_bytes!("../tests/002_hello.ts").to_vec(),
};
let mock_state = ThreadSafeGlobalState::mock(vec![
String::from("deno"),
String::from("hello.js"),
]);
let fut = async move {
let result = mock_state
.ts_compiler
.compile_async(mock_state.clone(), &out)
.await;
assert!(result.is_ok());
assert!(result
.unwrap()
.code
.as_bytes()
.starts_with("console.log(\"Hello World\");".as_bytes()));
Ok(())
};
tokio_util::run(fut.boxed())
}
#[test]
fn test_bundle_async() {
let p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("tests/002_hello.ts");
use deno::ModuleSpecifier;
let module_name = ModuleSpecifier::resolve_url_or_path(p.to_str().unwrap())
.unwrap()
.to_string();
let state = ThreadSafeGlobalState::mock(vec![
String::from("deno"),
p.to_string_lossy().into(),
String::from("$deno$/bundle.js"),
]);
let fut = async move {
let result = state
.ts_compiler
.bundle_async(
state.clone(),
module_name,
Some(String::from("$deno$/bundle.js")),
)
.await;
assert!(result.is_ok());
Ok(())
};
tokio_util::run(fut.boxed())
}
#[test]
fn test_source_code_version_hash() {
assert_eq!(
"0185b42de0686b4c93c314daaa8dee159f768a9e9a336c2a5e3d5b8ca6c4208c",
source_code_version_hash(b"1+2", "0.4.0", b"{}")
);
// Different source_code should result in different hash.
assert_eq!(
"e58631f1b6b6ce2b300b133ec2ad16a8a5ba6b7ecf812a8c06e59056638571ac",
source_code_version_hash(b"1", "0.4.0", b"{}")
);
// Different version should result in different hash.
assert_eq!(
"307e6200347a88dbbada453102deb91c12939c65494e987d2d8978f6609b5633",
source_code_version_hash(b"1", "0.1.0", b"{}")
);
// Different config should result in different hash.
assert_eq!(
"195eaf104a591d1d7f69fc169c60a41959c2b7a21373cd23a8f675f877ec385f",
source_code_version_hash(b"1", "0.4.0", b"{\"compilerOptions\": {}}")
);
}
#[test]
fn test_compile_js() {
let temp_dir = TempDir::new().expect("tempdir fail");
let temp_dir_path = temp_dir.path();
let test_cases = vec![
// valid JSON
(r#"{ "compilerOptions": { "checkJs": true } } "#, true),
// JSON with comment
(
r#"{ "compilerOptions": { // force .js file compilation by Deno "checkJs": true } } "#,
true,
),
// invalid JSON
(r#"{ "compilerOptions": { "checkJs": true },{ } "#, true),
// without content
("", false),
];
let path = temp_dir_path.join("tsconfig.json");
let path_str = path.to_str().unwrap().to_string();
for (json_str, expected) in test_cases {
deno_fs::write_file(&path, json_str.as_bytes(), 0o666).unwrap();
let config = CompilerConfig::load(Some(path_str.clone())).unwrap();
assert_eq!(config.compile_js, expected);
}
}
#[test]
fn test_compiler_config_load() {
let temp_dir = TempDir::new().expect("tempdir fail");
let temp_dir_path = temp_dir.path();
let path = temp_dir_path.join("doesnotexist.json");
let path_str = path.to_str().unwrap().to_string();
let res = CompilerConfig::load(Some(path_str));
assert!(res.is_err());
}
}