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global_state.rs
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global_state.rs
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use crate::deno_dir;
use crate::file_fetcher::SourceFileFetcher;
use crate::flags;
use crate::http_cache;
use crate::lockfile::Lockfile;
use crate::msg;
use crate::permissions::Permissions;
use crate::tsc::CompiledModule;
use crate::tsc::TargetLib;
use crate::tsc::TsCompiler;
use deno_core::ErrBox;
use deno_core::ModuleSpecifier;
use std::env;
use std::ops::Deref;
use std::sync::atomic::AtomicUsize;
use std::sync::Arc;
use std::sync::Mutex;
use tokio::sync::Mutex as AsyncMutex;
/// Holds state of the program and can be accessed by V8 isolate.
#[derive(Clone)]
pub struct GlobalState(Arc<GlobalStateInner>);
/// This structure represents state of single "deno" program.
///
/// It is shared by all created workers (thus V8 isolates).
pub struct GlobalStateInner {
/// Flags parsed from `argv` contents.
pub flags: flags::Flags,
/// Permissions parsed from `flags`.
pub permissions: Permissions,
pub dir: deno_dir::DenoDir,
pub file_fetcher: SourceFileFetcher,
pub ts_compiler: TsCompiler,
pub lockfile: Option<Mutex<Lockfile>>,
pub compiler_starts: AtomicUsize,
compile_lock: AsyncMutex<()>,
}
impl Deref for GlobalState {
type Target = GlobalStateInner;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl GlobalState {
pub fn new(flags: flags::Flags) -> Result<Self, ErrBox> {
let custom_root = env::var("DENO_DIR").map(String::into).ok();
let dir = deno_dir::DenoDir::new(custom_root)?;
let deps_cache_location = dir.root.join("deps");
let http_cache = http_cache::HttpCache::new(&deps_cache_location);
http_cache.ensure_location()?;
let file_fetcher = SourceFileFetcher::new(
http_cache,
!flags.reload,
flags.cache_blacklist.clone(),
flags.no_remote,
flags.cached_only,
flags.ca_file.clone(),
)?;
let ts_compiler = TsCompiler::new(
file_fetcher.clone(),
dir.gen_cache.clone(),
!flags.reload,
flags.config_path.clone(),
)?;
// Note: reads lazily from disk on first call to lockfile.check()
let lockfile = if let Some(filename) = &flags.lock {
Some(Mutex::new(Lockfile::new(filename.to_string())))
} else {
None
};
let inner = GlobalStateInner {
dir,
permissions: Permissions::from_flags(&flags),
flags,
file_fetcher,
ts_compiler,
lockfile,
compiler_starts: AtomicUsize::new(0),
compile_lock: AsyncMutex::new(()),
};
Ok(GlobalState(Arc::new(inner)))
}
pub async fn fetch_compiled_module(
&self,
module_specifier: ModuleSpecifier,
maybe_referrer: Option<ModuleSpecifier>,
target_lib: TargetLib,
permissions: Permissions,
) -> Result<CompiledModule, ErrBox> {
let state1 = self.clone();
let state2 = self.clone();
let module_specifier = module_specifier.clone();
let out = self
.file_fetcher
.fetch_source_file(&module_specifier, maybe_referrer, permissions.clone())
.await?;
// TODO(ry) Try to lift compile_lock as high up in the call stack for
// sanity.
let compile_lock = self.compile_lock.lock().await;
let compiled_module = match out.media_type {
msg::MediaType::TypeScript
| msg::MediaType::TSX
| msg::MediaType::JSX => {
state1
.ts_compiler
.compile(state1.clone(), &out, target_lib, permissions.clone())
.await
}
msg::MediaType::JavaScript => {
if state1.ts_compiler.compile_js {
state2
.ts_compiler
.compile(state1.clone(), &out, target_lib, permissions.clone())
.await
} else {
if let Some(types_url) = out.types_url.clone() {
let types_specifier = ModuleSpecifier::from(types_url);
state1
.file_fetcher
.fetch_source_file(
&types_specifier,
Some(module_specifier.clone()),
permissions.clone(),
)
.await
.ok();
};
Ok(CompiledModule {
code: String::from_utf8(out.source_code)?,
name: out.url.to_string(),
})
}
}
_ => Ok(CompiledModule {
code: String::from_utf8(out.source_code)?,
name: out.url.to_string(),
}),
}?;
drop(compile_lock);
if let Some(ref lockfile) = state2.lockfile {
let mut g = lockfile.lock().unwrap();
if state2.flags.lock_write {
g.insert(&compiled_module);
} else {
let check = match g.check(&compiled_module) {
Err(e) => return Err(ErrBox::from(e)),
Ok(v) => v,
};
if !check {
eprintln!(
"Subresource integrity check failed --lock={}\n{}",
g.filename, compiled_module.name
);
std::process::exit(10);
}
}
}
Ok(compiled_module)
}
#[cfg(test)]
pub fn mock(argv: Vec<String>) -> GlobalState {
GlobalState::new(flags::Flags {
argv,
..flags::Flags::default()
})
.unwrap()
}
}
#[test]
fn thread_safe() {
fn f<S: Send + Sync>(_: S) {}
f(GlobalState::mock(vec![]));
}
#[test]
fn import_map_given_for_repl() {
let _result = GlobalState::new(flags::Flags {
import_map_path: Some("import_map.json".to_string()),
..flags::Flags::default()
});
}