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refactor(snapshots): to their own crate (#14794)

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Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
This commit is contained in:
Aaron O'Mullan 2022-06-24 10:04:45 -03:00 committed by GitHub
parent d39094913e
commit fd5a12d7e2
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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 741 additions and 675 deletions
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24
Cargo.lock generated
View file

@ -738,23 +738,14 @@ dependencies = [
"data-url",
"deno_ast",
"deno_bench_util",
"deno_broadcast_channel",
"deno_console",
"deno_core",
"deno_crypto",
"deno_doc",
"deno_emit",
"deno_fetch",
"deno_graph",
"deno_lint",
"deno_net",
"deno_runtime",
"deno_snapshots",
"deno_task_shell",
"deno_url",
"deno_web",
"deno_webgpu",
"deno_websocket",
"deno_webstorage",
"dissimilar",
"dprint-plugin-json",
"dprint-plugin-markdown",
@ -1116,6 +1107,19 @@ dependencies = [
"winres",
]
[[package]]
name = "deno_snapshots"
version = "0.0.0"
dependencies = [
"deno_core",
"deno_runtime",
"lzzzz",
"once_cell",
"regex",
"serde",
"zstd",
]
[[package]]
name = "deno_task_shell"
version = "0.4.0"

1
Cargo.toml
View file

@ -9,6 +9,7 @@ members = [
"ops",
"runtime",
"serde_v8",
"snapshots",
"test_ffi",
"test_util",
"ext/broadcast_channel",

13
cli/Cargo.toml
View file

@ -25,17 +25,7 @@ harness = false
path = "./bench/lsp_bench_standalone.rs"
[build-dependencies]
deno_broadcast_channel = { version = "0.52.0", path = "../ext/broadcast_channel" }
deno_console = { version = "0.58.0", path = "../ext/console" }
deno_core = { version = "0.140.0", path = "../core" }
deno_crypto = { version = "0.72.0", path = "../ext/crypto" }
deno_fetch = { version = "0.81.0", path = "../ext/fetch" }
deno_net = { version = "0.50.0", path = "../ext/net" }
deno_url = { version = "0.58.0", path = "../ext/url" }
deno_web = { version = "0.89.0", path = "../ext/web" }
deno_webgpu = { version = "0.59.0", path = "../ext/webgpu" }
deno_websocket = { version = "0.63.0", path = "../ext/websocket" }
deno_webstorage = { version = "0.53.0", path = "../ext/webstorage" }
deno_runtime = { version = "0.66.0", path = "../runtime" }
regex = "=1.5.6"
serde = { version = "=1.0.136", features = ["derive"] }
zstd = '=0.11.1'
@ -52,6 +42,7 @@ deno_emit = "0.3.0"
deno_graph = "0.28.0"
deno_lint = { version = "0.31.0", features = ["docs"] }
deno_runtime = { version = "0.66.0", path = "../runtime" }
deno_snapshots = { version = "0.0.0", path = "../snapshots" }
deno_task_shell = "0.4.0"
atty = "=0.2.14"

387
cli/build.rs
View file

@ -1,323 +1,19 @@
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use deno_core::error::custom_error;
use deno_core::error::AnyError;
use deno_core::op;
use deno_core::serde::Deserialize;
use deno_core::serde_json::json;
use deno_core::serde_json::Value;
use deno_core::Extension;
use deno_core::JsRuntime;
use deno_core::OpState;
use deno_core::RuntimeOptions;
use regex::Regex;
use std::collections::HashMap;
use deno_runtime::deno_broadcast_channel;
use deno_runtime::deno_console;
use deno_runtime::deno_crypto;
use deno_runtime::deno_fetch;
use deno_runtime::deno_net;
use deno_runtime::deno_url;
use deno_runtime::deno_web;
use deno_runtime::deno_websocket;
use deno_runtime::deno_webstorage;
use std::env;
use std::path::Path;
use std::path::PathBuf;
// TODO(bartlomieju): this module contains a lot of duplicated
// logic with `runtime/build.rs`, factor out to `deno_core`.
fn create_snapshot(
mut js_runtime: JsRuntime,
snapshot_path: &Path,
files: Vec<PathBuf>,
) {
// TODO(nayeemrmn): https://github.com/rust-lang/cargo/issues/3946 to get the
// workspace root.
let display_root = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap();
for file in files {
println!("cargo:rerun-if-changed={}", file.display());
let display_path = file.strip_prefix(display_root).unwrap();
let display_path_str = display_path.display().to_string();
js_runtime
.execute_script(
&("deno:".to_string() + &display_path_str.replace('\\', "/")),
&std::fs::read_to_string(&file).unwrap(),
)
.unwrap();
}
let snapshot = js_runtime.snapshot();
let snapshot_slice: &[u8] = &*snapshot;
println!("Snapshot size: {}", snapshot_slice.len());
let compressed_snapshot_with_size = {
let mut vec = vec![];
vec.extend_from_slice(
&u32::try_from(snapshot.len())
.expect("snapshot larger than 4gb")
.to_le_bytes(),
);
vec.extend_from_slice(
&zstd::bulk::compress(snapshot_slice, 22)
.expect("snapshot compression failed"),
);
vec
};
println!(
"Snapshot compressed size: {}",
compressed_snapshot_with_size.len()
);
std::fs::write(&snapshot_path, compressed_snapshot_with_size).unwrap();
println!("Snapshot written to: {} ", snapshot_path.display());
}
#[derive(Debug, Deserialize)]
struct LoadArgs {
/// The fully qualified specifier that should be loaded.
specifier: String,
}
fn create_compiler_snapshot(
snapshot_path: &Path,
files: Vec<PathBuf>,
cwd: &Path,
) {
// libs that are being provided by op crates.
let mut op_crate_libs = HashMap::new();
op_crate_libs.insert("deno.console", deno_console::get_declaration());
op_crate_libs.insert("deno.url", deno_url::get_declaration());
op_crate_libs.insert("deno.web", deno_web::get_declaration());
op_crate_libs.insert("deno.fetch", deno_fetch::get_declaration());
op_crate_libs.insert("deno.webgpu", deno_webgpu_get_declaration());
op_crate_libs.insert("deno.websocket", deno_websocket::get_declaration());
op_crate_libs.insert("deno.webstorage", deno_webstorage::get_declaration());
op_crate_libs.insert("deno.crypto", deno_crypto::get_declaration());
op_crate_libs.insert(
"deno.broadcast_channel",
deno_broadcast_channel::get_declaration(),
);
op_crate_libs.insert("deno.net", deno_net::get_declaration());
// ensure we invalidate the build properly.
for (_, path) in op_crate_libs.iter() {
println!("cargo:rerun-if-changed={}", path.display());
}
// libs that should be loaded into the isolate before snapshotting.
let libs = vec![
// Deno custom type libraries
"deno.window",
"deno.worker",
"deno.shared_globals",
"deno.ns",
"deno.unstable",
// Deno built-in type libraries
"es5",
"es2015.collection",
"es2015.core",
"es2015",
"es2015.generator",
"es2015.iterable",
"es2015.promise",
"es2015.proxy",
"es2015.reflect",
"es2015.symbol",
"es2015.symbol.wellknown",
"es2016.array.include",
"es2016",
"es2017",
"es2017.intl",
"es2017.object",
"es2017.sharedmemory",
"es2017.string",
"es2017.typedarrays",
"es2018.asyncgenerator",
"es2018.asynciterable",
"es2018",
"es2018.intl",
"es2018.promise",
"es2018.regexp",
"es2019.array",
"es2019",
"es2019.object",
"es2019.string",
"es2019.symbol",
"es2020.bigint",
"es2020",
"es2020.date",
"es2020.intl",
"es2020.number",
"es2020.promise",
"es2020.sharedmemory",
"es2020.string",
"es2020.symbol.wellknown",
"es2021",
"es2021.intl",
"es2021.promise",
"es2021.string",
"es2021.weakref",
"es2022",
"es2022.array",
"es2022.error",
"es2022.intl",
"es2022.object",
"es2022.string",
"esnext",
"esnext.array",
"esnext.intl",
];
let path_dts = cwd.join("dts");
// ensure we invalidate the build properly.
for name in libs.iter() {
println!(
"cargo:rerun-if-changed={}",
path_dts.join(format!("lib.{}.d.ts", name)).display()
);
}
// create a copy of the vector that includes any op crate libs to be passed
// to the JavaScript compiler to build into the snapshot
let mut build_libs = libs.clone();
for (op_lib, _) in op_crate_libs.iter() {
build_libs.push(op_lib.to_owned());
}
#[op]
fn op_build_info(state: &mut OpState) -> Value {
let build_specifier = "asset:///bootstrap.ts";
let build_libs = state.borrow::<Vec<&str>>();
json!({
"buildSpecifier": build_specifier,
"libs": build_libs,
})
}
#[op]
fn op_cwd() -> String {
"cache:///".into()
}
#[op]
fn op_exists() -> bool {
false
}
#[op]
fn op_script_version(
_state: &mut OpState,
_args: Value,
) -> Result<Option<String>, AnyError> {
Ok(Some("1".to_string()))
}
#[op]
// using the same op that is used in `tsc.rs` for loading modules and reading
// files, but a slightly different implementation at build time.
fn op_load(state: &mut OpState, args: LoadArgs) -> Result<Value, AnyError> {
let op_crate_libs = state.borrow::<HashMap<&str, PathBuf>>();
let path_dts = state.borrow::<PathBuf>();
let re_asset =
Regex::new(r"asset:/{3}lib\.(\S+)\.d\.ts").expect("bad regex");
let build_specifier = "asset:///bootstrap.ts";
// we need a basic file to send to tsc to warm it up.
if args.specifier == build_specifier {
Ok(json!({
"data": r#"console.log("hello deno!");"#,
"version": "1",
// this corresponds to `ts.ScriptKind.TypeScript`
"scriptKind": 3
}))
// specifiers come across as `asset:///lib.{lib_name}.d.ts` and we need to
// parse out just the name so we can lookup the asset.
} else if let Some(caps) = re_asset.captures(&args.specifier) {
if let Some(lib) = caps.get(1).map(|m| m.as_str()) {
// if it comes from an op crate, we were supplied with the path to the
// file.
let path = if let Some(op_crate_lib) = op_crate_libs.get(lib) {
PathBuf::from(op_crate_lib).canonicalize().unwrap()
// otherwise we are will generate the path ourself
} else {
path_dts.join(format!("lib.{}.d.ts", lib))
};
let data = std::fs::read_to_string(path)?;
Ok(json!({
"data": data,
"version": "1",
// this corresponds to `ts.ScriptKind.TypeScript`
"scriptKind": 3
}))
} else {
Err(custom_error(
"InvalidSpecifier",
format!("An invalid specifier was requested: {}", args.specifier),
))
}
} else {
Err(custom_error(
"InvalidSpecifier",
format!("An invalid specifier was requested: {}", args.specifier),
))
}
}
let js_runtime = JsRuntime::new(RuntimeOptions {
will_snapshot: true,
extensions: vec![Extension::builder()
.ops(vec![
op_build_info::decl(),
op_cwd::decl(),
op_exists::decl(),
op_load::decl(),
op_script_version::decl(),
])
.state(move |state| {
state.put(op_crate_libs.clone());
state.put(build_libs.clone());
state.put(path_dts.clone());
Ok(())
})
.build()],
..Default::default()
});
create_snapshot(js_runtime, snapshot_path, files);
}
fn ts_version() -> String {
std::fs::read_to_string("tsc/00_typescript.js")
.unwrap()
.lines()
.find(|l| l.contains("ts.version = "))
.expect(
"Failed to find the pattern `ts.version = ` in typescript source code",
)
.chars()
.skip_while(|c| !char::is_numeric(*c))
.take_while(|c| *c != '"')
.collect::<String>()
}
fn git_commit_hash() -> String {
if let Ok(output) = std::process::Command::new("git")
.arg("rev-list")
.arg("-1")
.arg("HEAD")
.output()
{
if output.status.success() {
std::str::from_utf8(&output.stdout[..40])
.unwrap()
.to_string()
} else {
// When not in git repository
// (e.g. when the user install by `cargo install deno`)
"UNKNOWN".to_string()
}
} else {
// When there is no git command for some reason
"UNKNOWN".to_string()
}
}
fn main() {
// Skip building from docs.rs.
if env::var_os("DOCS_RS").is_some() {
@ -330,8 +26,9 @@ fn main() {
if target != host {
panic!("Cross compiling with snapshot is not supported.");
}
// To debug snapshot issues uncomment:
// op_fetch_asset::trace_serializer();
println!("cargo:rustc-env=TARGET={}", env::var("TARGET").unwrap());
println!("cargo:rustc-env=PROFILE={}", env::var("PROFILE").unwrap());
if let Ok(c) = env::var("DENO_CANARY") {
println!("cargo:rustc-env=DENO_CANARY={}", c);
@ -385,18 +82,6 @@ fn main() {
deno_net::get_declaration().display()
);
println!("cargo:rustc-env=TARGET={}", env::var("TARGET").unwrap());
println!("cargo:rustc-env=PROFILE={}", env::var("PROFILE").unwrap());
let c = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
let o = PathBuf::from(env::var_os("OUT_DIR").unwrap());
// Main snapshot
let compiler_snapshot_path = o.join("COMPILER_SNAPSHOT.bin");
let js_files = get_js_files("tsc");
create_compiler_snapshot(&compiler_snapshot_path, js_files, &c);
#[cfg(target_os = "windows")]
{
let mut res = winres::WindowsResource::new();
@ -414,16 +99,38 @@ fn deno_webgpu_get_declaration() -> PathBuf {
manifest_dir.join("dts").join("lib.deno_webgpu.d.ts")
}
fn get_js_files(d: &str) -> Vec<PathBuf> {
let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
let mut js_files = std::fs::read_dir(d)
.unwrap()
.map(|dir_entry| {
let file = dir_entry.unwrap();
manifest_dir.join(file.path())
})
.filter(|path| path.extension().unwrap_or_default() == "js")
.collect::<Vec<PathBuf>>();
js_files.sort();
js_files
fn git_commit_hash() -> String {
if let Ok(output) = std::process::Command::new("git")
.arg("rev-list")
.arg("-1")
.arg("HEAD")
.output()
{
if output.status.success() {
std::str::from_utf8(&output.stdout[..40])
.unwrap()
.to_string()
} else {
// When not in git repository
// (e.g. when the user install by `cargo install deno`)
"UNKNOWN".to_string()
}
} else {
// When there is no git command for some reason
"UNKNOWN".to_string()
}
}
fn ts_version() -> String {
std::fs::read_to_string("tsc/00_typescript.js")
.unwrap()
.lines()
.find(|l| l.contains("ts.version = "))
.expect(
"Failed to find the pattern `ts.version = ` in typescript source code",
)
.chars()
.skip_while(|c| !char::is_numeric(*c))
.take_while(|c| *c != '"')
.collect::<String>()
}

2
cli/lsp/tsc.rs
View file

@ -2618,7 +2618,7 @@ fn op_script_version(
fn js_runtime(performance: Arc<Performance>) -> JsRuntime {
JsRuntime::new(RuntimeOptions {
extensions: vec![init_extension(performance)],
startup_snapshot: Some(tsc::compiler_snapshot()),
startup_snapshot: Some(deno_snapshots::tsc_snapshot()),
..Default::default()
})
}

2
cli/main.rs
View file

@ -179,6 +179,7 @@ fn create_web_worker_callback(
shared_array_buffer_store: Some(ps.shared_array_buffer_store.clone()),
compiled_wasm_module_store: Some(ps.compiled_wasm_module_store.clone()),
stdio: stdio.clone(),
startup_snapshot: Some(deno_snapshots::cli_snapshot()),
};
WebWorker::bootstrap_from_options(
@ -274,6 +275,7 @@ pub fn create_main_worker(
shared_array_buffer_store: Some(ps.shared_array_buffer_store.clone()),
compiled_wasm_module_store: Some(ps.compiled_wasm_module_store.clone()),
stdio,
startup_snapshot: Some(deno_snapshots::cli_snapshot()),
};
MainWorker::bootstrap_from_options(main_module, permissions, options)

1
cli/standalone.rs
View file

@ -307,6 +307,7 @@ pub async fn run(
shared_array_buffer_store: None,
compiled_wasm_module_store: None,
stdio: Default::default(),
startup_snapshot: Some(deno_snapshots::cli_snapshot()),
};
let mut worker = MainWorker::bootstrap_from_options(
main_module.clone(),

28
cli/tsc.rs
View file

@ -24,7 +24,6 @@ use deno_core::JsRuntime;
use deno_core::ModuleSpecifier;
use deno_core::OpState;
use deno_core::RuntimeOptions;
use deno_core::Snapshot;
use deno_graph::Resolved;
use once_cell::sync::Lazy;
use std::collections::HashMap;
@ -52,27 +51,6 @@ pub static SHARED_GLOBALS_LIB: &str =
pub static WINDOW_LIB: &str = include_str!("dts/lib.deno.window.d.ts");
pub static UNSTABLE_NS_LIB: &str = include_str!("dts/lib.deno.unstable.d.ts");
pub static COMPILER_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new(
#[cold]
#[inline(never)]
|| {
static COMPRESSED_COMPILER_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
zstd::bulk::decompress(
&COMPRESSED_COMPILER_SNAPSHOT[4..],
u32::from_le_bytes(COMPRESSED_COMPILER_SNAPSHOT[0..4].try_into().unwrap())
as usize,
)
.unwrap()
.into_boxed_slice()
},
);
pub fn compiler_snapshot() -> Snapshot {
Snapshot::Static(&*COMPILER_SNAPSHOT)
}
macro_rules! inc {
($e:expr) => {
include_str!(concat!("dts/", $e))
@ -657,7 +635,7 @@ pub fn exec(request: Request) -> Result<Response, AnyError> {
})
.collect();
let mut runtime = JsRuntime::new(RuntimeOptions {
startup_snapshot: Some(compiler_snapshot()),
startup_snapshot: Some(deno_snapshots::tsc_snapshot()),
extensions: vec![Extension::builder()
.ops(vec![
op_cwd::decl(),
@ -841,9 +819,9 @@ mod tests {
}
#[test]
fn test_compiler_snapshot() {
fn test_tsc_snapshot() {
let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
startup_snapshot: Some(compiler_snapshot()),
startup_snapshot: Some(deno_snapshots::tsc_snapshot()),
..Default::default()
});
js_runtime

19
runtime/Cargo.toml
View file

@ -21,25 +21,6 @@ path = "lib.rs"
name = "hello_runtime"
path = "examples/hello_runtime.rs"
[build-dependencies]
deno_broadcast_channel = { version = "0.52.0", path = "../ext/broadcast_channel" }
deno_console = { version = "0.58.0", path = "../ext/console" }
deno_core = { version = "0.140.0", path = "../core" }
deno_crypto = { version = "0.72.0", path = "../ext/crypto" }
deno_fetch = { version = "0.81.0", path = "../ext/fetch" }
deno_ffi = { version = "0.45.0", path = "../ext/ffi" }
deno_http = { version = "0.52.0", path = "../ext/http" }
deno_net = { version = "0.50.0", path = "../ext/net" }
deno_tls = { version = "0.45.0", path = "../ext/tls" }
deno_url = { version = "0.58.0", path = "../ext/url" }
deno_web = { version = "0.89.0", path = "../ext/web" }
deno_webgpu = { version = "0.59.0", path = "../ext/webgpu" }
deno_webidl = { version = "0.58.0", path = "../ext/webidl" }
deno_websocket = { version = "0.63.0", path = "../ext/websocket" }
deno_webstorage = { version = "0.53.0", path = "../ext/webstorage" }
lzzzz = '1.0'
[target.'cfg(windows)'.build-dependencies]
winres = "0.1.11"
winapi = "0.3.9"

222
runtime/build.rs
View file

@ -1,219 +1,17 @@
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use std::env;
use std::path::Path;
use std::path::PathBuf;
// This is a shim that allows to generate documentation on docs.rs
#[cfg(not(feature = "docsrs"))]
mod not_docs {
use super::*;
use deno_core::Extension;
use deno_core::JsRuntime;
use deno_core::RuntimeOptions;
// TODO(bartlomieju): this module contains a lot of duplicated
// logic with `cli/build.rs`, factor out to `deno_core`.
fn create_snapshot(
mut js_runtime: JsRuntime,
snapshot_path: &Path,
files: Vec<PathBuf>,
) {
// TODO(nayeemrmn): https://github.com/rust-lang/cargo/issues/3946 to get the
// workspace root.
let display_root = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap();
for file in files {
println!("cargo:rerun-if-changed={}", file.display());
let display_path = file.strip_prefix(display_root).unwrap();
let display_path_str = display_path.display().to_string();
js_runtime
.execute_script(
&("deno:".to_string() + &display_path_str.replace('\\', "/")),
&std::fs::read_to_string(&file).unwrap(),
)
.unwrap();
}
let snapshot = js_runtime.snapshot();
let snapshot_slice: &[u8] = &*snapshot;
println!("Snapshot size: {}", snapshot_slice.len());
let compressed_snapshot_with_size = {
let mut vec = vec![];
vec.extend_from_slice(
&u32::try_from(snapshot.len())
.expect("snapshot larger than 4gb")
.to_le_bytes(),
);
lzzzz::lz4_hc::compress_to_vec(
snapshot_slice,
&mut vec,
lzzzz::lz4_hc::CLEVEL_MAX,
)
.expect("snapshot compression failed");
vec
};
println!(
"Snapshot compressed size: {}",
compressed_snapshot_with_size.len()
);
std::fs::write(&snapshot_path, compressed_snapshot_with_size).unwrap();
println!("Snapshot written to: {} ", snapshot_path.display());
}
struct Permissions;
impl deno_fetch::FetchPermissions for Permissions {
fn check_net_url(
&mut self,
_url: &deno_core::url::Url,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
fn check_read(
&mut self,
_p: &Path,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
impl deno_websocket::WebSocketPermissions for Permissions {
fn check_net_url(
&mut self,
_url: &deno_core::url::Url,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
impl deno_web::TimersPermission for Permissions {
fn allow_hrtime(&mut self) -> bool {
unreachable!("snapshotting!")
}
fn check_unstable(
&self,
_state: &deno_core::OpState,
_api_name: &'static str,
) {
unreachable!("snapshotting!")
}
}
impl deno_ffi::FfiPermissions for Permissions {
fn check(
&mut self,
_path: Option<&Path>,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
impl deno_net::NetPermissions for Permissions {
fn check_net<T: AsRef<str>>(
&mut self,
_host: &(T, Option<u16>),
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
fn check_read(
&mut self,
_p: &Path,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
fn check_write(
&mut self,
_p: &Path,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
fn create_runtime_snapshot(snapshot_path: &Path, files: Vec<PathBuf>) {
let extensions: Vec<Extension> = vec![
deno_webidl::init(),
deno_console::init(),
deno_url::init(),
deno_tls::init(),
deno_web::init::<Permissions>(
deno_web::BlobStore::default(),
Default::default(),
),
deno_fetch::init::<Permissions>(Default::default()),
deno_websocket::init::<Permissions>("".to_owned(), None, None),
deno_webstorage::init(None),
deno_crypto::init(None),
deno_webgpu::init(false),
deno_broadcast_channel::init(
deno_broadcast_channel::InMemoryBroadcastChannel::default(),
false, // No --unstable.
),
deno_ffi::init::<Permissions>(false),
deno_net::init::<Permissions>(
None, false, // No --unstable.
None,
),
deno_http::init(),
];
let js_runtime = JsRuntime::new(RuntimeOptions {
will_snapshot: true,
extensions,
..Default::default()
});
create_snapshot(js_runtime, snapshot_path, files);
}
fn get_js_files(d: &str) -> Vec<PathBuf> {
let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
let mut js_files = std::fs::read_dir(d)
.unwrap()
.map(|dir_entry| {
let file = dir_entry.unwrap();
manifest_dir.join(file.path())
})
.filter(|path| path.extension().unwrap_or_default() == "js")
.collect::<Vec<PathBuf>>();
js_files.sort();
js_files
}
pub fn build_snapshot(runtime_snapshot_path: PathBuf) {
let js_files = get_js_files("js");
create_runtime_snapshot(&runtime_snapshot_path, js_files);
}
}
fn main() {
// To debug snapshot issues uncomment:
// op_fetch_asset::trace_serializer();
println!("cargo:rustc-env=TARGET={}", env::var("TARGET").unwrap());
println!("cargo:rustc-env=PROFILE={}", env::var("PROFILE").unwrap());
let o = PathBuf::from(env::var_os("OUT_DIR").unwrap());
// Main snapshot
let runtime_snapshot_path = o.join("CLI_SNAPSHOT.bin");
// If we're building on docs.rs we just create
// and empty snapshot file and return, because `rusty_v8`
// doesn't actually compile on docs.rs
if env::var_os("DOCS_RS").is_some() {
let snapshot_slice = &[];
std::fs::write(&runtime_snapshot_path, snapshot_slice).unwrap();
// Skip building from docs.rs.
if std::env::var_os("DOCS_RS").is_some() {
return;
}
#[cfg(not(feature = "docsrs"))]
not_docs::build_snapshot(runtime_snapshot_path)
println!(
"cargo:rustc-env=TARGET={}",
std::env::var("TARGET").unwrap()
);
println!(
"cargo:rustc-env=PROFILE={}",
std::env::var("PROFILE").unwrap()
);
}

1
runtime/examples/hello_runtime.rs
View file

@ -58,6 +58,7 @@ async fn main() -> Result<(), AnyError> {
shared_array_buffer_store: None,
compiled_wasm_module_store: None,
stdio: Default::default(),
startup_snapshot: None,
};
let js_path =

90
runtime/js.rs
View file

@ -1,58 +1,38 @@
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use deno_core::Snapshot;
use log::debug;
use once_cell::sync::Lazy;
use deno_core::include_js_files;
use deno_core::Extension;
pub static CLI_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new(
#[allow(clippy::uninit_vec)]
#[cold]
#[inline(never)]
|| {
static COMPRESSED_CLI_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.bin"));
let size =
u32::from_le_bytes(COMPRESSED_CLI_SNAPSHOT[0..4].try_into().unwrap())
as usize;
let mut vec = Vec::with_capacity(size);
// SAFETY: vec is allocated with exact snapshot size (+ alignment)
// SAFETY: non zeroed bytes are overwritten with decompressed snapshot
unsafe {
vec.set_len(size);
}
lzzzz::lz4::decompress(&COMPRESSED_CLI_SNAPSHOT[4..], &mut vec).unwrap();
vec.into_boxed_slice()
},
);
pub fn deno_isolate_init() -> Snapshot {
debug!("Deno isolate init with snapshots.");
Snapshot::Static(&*CLI_SNAPSHOT)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn cli_snapshot() {
let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
startup_snapshot: Some(deno_isolate_init()),
..Default::default()
});
js_runtime
.execute_script(
"<anon>",
r#"
if (!(bootstrap.mainRuntime && bootstrap.workerRuntime)) {
throw Error("bad");
}
console.log("we have console.log!!!");
"#,
)
.unwrap();
}
pub fn init() -> Extension {
Extension::builder()
.js(include_js_files!(
prefix "deno:runtime",
// Generated with:
// bash -c "cd runtime && ls js/*.js | sort"
"js/01_build.js",
"js/01_errors.js",
"js/01_version.js",
"js/01_web_util.js",
"js/06_util.js",
"js/10_permissions.js",
"js/11_workers.js",
"js/12_io.js",
"js/13_buffer.js",
"js/30_fs.js",
"js/30_os.js",
"js/40_diagnostics.js",
"js/40_files.js",
"js/40_fs_events.js",
"js/40_http.js",
"js/40_process.js",
"js/40_read_file.js",
"js/40_signals.js",
"js/40_spawn.js",
"js/40_testing.js",
"js/40_tty.js",
"js/40_write_file.js",
"js/41_prompt.js",
"js/90_deno_ns.js",
"js/99_main.js",
))
.build()
}

5
runtime/web_worker.rs
View file

@ -335,6 +335,7 @@ pub struct WebWorkerOptions {
pub shared_array_buffer_store: Option<SharedArrayBufferStore>,
pub compiled_wasm_module_store: Option<CompiledWasmModuleStore>,
pub stdio: Stdio,
pub startup_snapshot: Option<deno_core::Snapshot>,
}
impl WebWorker {
@ -427,6 +428,8 @@ impl WebWorker {
ops::tty::init(),
deno_http::init(),
ops::http::init(),
// Runtime JS
js::init(),
// Permissions ext (worker specific state)
perm_ext,
];
@ -436,7 +439,7 @@ impl WebWorker {
let mut js_runtime = JsRuntime::new(RuntimeOptions {
module_loader: Some(options.module_loader.clone()),
startup_snapshot: Some(js::deno_isolate_init()),
startup_snapshot: options.startup_snapshot.take(),
source_map_getter: options.source_map_getter,
get_error_class_fn: options.get_error_class_fn,
shared_array_buffer_store: options.shared_array_buffer_store.clone(),

6
runtime/worker.rs
View file

@ -81,6 +81,7 @@ pub struct WorkerOptions {
pub shared_array_buffer_store: Option<SharedArrayBufferStore>,
pub compiled_wasm_module_store: Option<CompiledWasmModuleStore>,
pub stdio: Stdio,
pub startup_snapshot: Option<deno_core::Snapshot>,
}
impl MainWorker {
@ -168,6 +169,8 @@ impl MainWorker {
ops::tty::init(),
deno_http::init(),
ops::http::init(),
// Runtime JS
js::init(),
// Permissions ext (worker specific state)
perm_ext,
];
@ -175,7 +178,7 @@ impl MainWorker {
let mut js_runtime = JsRuntime::new(RuntimeOptions {
module_loader: Some(options.module_loader.clone()),
startup_snapshot: Some(js::deno_isolate_init()),
startup_snapshot: options.startup_snapshot.take(),
source_map_getter: options.source_map_getter,
get_error_class_fn: options.get_error_class_fn,
shared_array_buffer_store: options.shared_array_buffer_store.clone(),
@ -411,6 +414,7 @@ mod tests {
shared_array_buffer_store: None,
compiled_wasm_module_store: None,
stdio: Default::default(),
startup_snapshot: None,
};
MainWorker::bootstrap_from_options(main_module, permissions, options)

32
snapshots/Cargo.toml Normal file
View file

@ -0,0 +1,32 @@
# Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
# IMPORTANT(bartlomieju): this crate is internal and shouldn't be published
# to crates.io
[package]
name = "deno_snapshots"
version = "0.0.0"
authors = ["the Deno authors"]
edition = "2018"
license = "MIT"
repository = "https://github.com/denoland/deno"
description = "Provides snapshots of TSC & Deno (runtime+web+core)"
[lib]
name = "deno_snapshots"
path = "lib.rs"
[dependencies]
deno_core = { version = "0.140.0", path = "../core" } # For mock TSC #[op]s
deno_runtime = { version = "0.66.0", path = "../runtime" }
lzzzz = "1.0"
once_cell = "1.10.0"
zstd = "0.11.1"
[build-dependencies]
deno_core = { version = "0.140.0", path = "../core" } # For mock TSC #[op]s
deno_runtime = { version = "0.66.0", path = "../runtime" }
lzzzz = "1.0"
regex = "1.5.6"
serde = { version = "1.0.125", features = ["derive"] }
zstd = "0.11.1"

10
snapshots/build.rs Normal file
View file

@ -0,0 +1,10 @@
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
mod build_runtime;
mod build_tsc;
fn main() {
let out_dir = std::path::PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
build_runtime::create_runtime_snapshot(&out_dir.join("CLI_SNAPSHOT.bin"));
build_tsc::create_tsc_snapshot(&out_dir.join("COMPILER_SNAPSHOT.bin"));
}

168
snapshots/build_runtime.rs Normal file
View file

@ -0,0 +1,168 @@
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use std::convert::TryFrom;
use std::path::Path;
use deno_runtime::deno_broadcast_channel;
use deno_runtime::deno_console;
use deno_runtime::deno_core;
use deno_runtime::deno_crypto;
use deno_runtime::deno_fetch;
use deno_runtime::deno_ffi;
use deno_runtime::deno_http;
use deno_runtime::deno_net;
use deno_runtime::deno_tls;
use deno_runtime::deno_url;
use deno_runtime::deno_web;
use deno_runtime::deno_webgpu;
use deno_runtime::deno_webidl;
use deno_runtime::deno_websocket;
use deno_runtime::deno_webstorage;
use deno_core::Extension;
use deno_core::JsRuntime;
use deno_core::RuntimeOptions;
pub fn create_runtime_snapshot(snapshot_path: &Path) {
let extensions: Vec<Extension> = vec![
deno_webidl::init(),
deno_console::init(),
deno_url::init(),
deno_tls::init(),
deno_web::init::<Permissions>(
deno_web::BlobStore::default(),
Default::default(),
),
deno_fetch::init::<Permissions>(Default::default()),
deno_websocket::init::<Permissions>("".to_owned(), None, None),
deno_webstorage::init(None),
deno_crypto::init(None),
deno_webgpu::init(false),
deno_broadcast_channel::init(
deno_broadcast_channel::InMemoryBroadcastChannel::default(),
false, // No --unstable.
),
deno_ffi::init::<Permissions>(false),
deno_net::init::<Permissions>(
None, false, // No --unstable.
None,
),
deno_http::init(),
// Runtime JS
deno_runtime::js::init(),
];
let js_runtime = JsRuntime::new(RuntimeOptions {
will_snapshot: true,
extensions,
..Default::default()
});
write_runtime_snapshot(js_runtime, snapshot_path);
}
// TODO(bartlomieju): this module contains a lot of duplicated
// logic with `build_tsc.rs`
fn write_runtime_snapshot(mut js_runtime: JsRuntime, snapshot_path: &Path) {
let snapshot = js_runtime.snapshot();
let snapshot_slice: &[u8] = &*snapshot;
println!("Snapshot size: {}", snapshot_slice.len());
let compressed_snapshot_with_size = {
let mut vec = vec![];
vec.extend_from_slice(
&u32::try_from(snapshot.len())
.expect("snapshot larger than 4gb")
.to_le_bytes(),
);
lzzzz::lz4_hc::compress_to_vec(
snapshot_slice,
&mut vec,
lzzzz::lz4_hc::CLEVEL_MAX,
)
.expect("snapshot compression failed");
vec
};
println!(
"Snapshot compressed size: {}",
compressed_snapshot_with_size.len()
);
std::fs::write(&snapshot_path, compressed_snapshot_with_size).unwrap();
println!("Snapshot written to: {} ", snapshot_path.display());
}
struct Permissions;
impl deno_fetch::FetchPermissions for Permissions {
fn check_net_url(
&mut self,
_url: &deno_core::url::Url,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
fn check_read(
&mut self,
_p: &Path,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
impl deno_websocket::WebSocketPermissions for Permissions {
fn check_net_url(
&mut self,
_url: &deno_core::url::Url,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
impl deno_web::TimersPermission for Permissions {
fn allow_hrtime(&mut self) -> bool {
unreachable!("snapshotting!")
}
fn check_unstable(
&self,
_state: &deno_core::OpState,
_api_name: &'static str,
) {
unreachable!("snapshotting!")
}
}
impl deno_ffi::FfiPermissions for Permissions {
fn check(
&mut self,
_path: Option<&Path>,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}
impl deno_net::NetPermissions for Permissions {
fn check_net<T: AsRef<str>>(
&mut self,
_host: &(T, Option<u16>),
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
fn check_read(
&mut self,
_p: &Path,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
fn check_write(
&mut self,
_p: &Path,
) -> Result<(), deno_core::error::AnyError> {
unreachable!("snapshotting!")
}
}

328
snapshots/build_tsc.rs Normal file
View file

@ -0,0 +1,328 @@
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use deno_runtime::deno_broadcast_channel;
use deno_runtime::deno_console;
use deno_runtime::deno_crypto;
use deno_runtime::deno_fetch;
use deno_runtime::deno_net;
use deno_runtime::deno_url;
use deno_runtime::deno_web;
use deno_runtime::deno_websocket;
use deno_runtime::deno_webstorage;
use deno_runtime::deno_core::error::custom_error;
use deno_runtime::deno_core::error::AnyError;
use deno_runtime::deno_core::op;
use deno_runtime::deno_core::serde::Deserialize;
use deno_runtime::deno_core::serde_json::json;
use deno_runtime::deno_core::serde_json::Value;
use deno_runtime::deno_core::Extension;
use deno_runtime::deno_core::JsRuntime;
use deno_runtime::deno_core::OpState;
use deno_runtime::deno_core::RuntimeOptions;
use regex::Regex;
use std::collections::HashMap;
use std::convert::TryFrom;
use std::env;
use std::path::Path;
use std::path::PathBuf;
pub fn create_tsc_snapshot(snapshot_path: &Path) {
let mut js_runtime = JsRuntime::new(RuntimeOptions {
will_snapshot: true,
extensions: vec![tsc_snapshot_init()],
..Default::default()
});
load_js_files(&mut js_runtime);
write_snapshot(js_runtime, snapshot_path);
}
// TODO(bartlomieju): this module contains a lot of duplicated
// logic with `build_runtime.rs`
fn write_snapshot(mut js_runtime: JsRuntime, snapshot_path: &Path) {
let snapshot = js_runtime.snapshot();
let snapshot_slice: &[u8] = &*snapshot;
println!("Snapshot size: {}", snapshot_slice.len());
let compressed_snapshot_with_size = {
let mut vec = vec![];
vec.extend_from_slice(
&u32::try_from(snapshot.len())
.expect("snapshot larger than 4gb")
.to_le_bytes(),
);
vec.extend_from_slice(
&zstd::bulk::compress(snapshot_slice, 22)
.expect("snapshot compression failed"),
);
vec
};
println!(
"Snapshot compressed size: {}",
compressed_snapshot_with_size.len()
);
std::fs::write(&snapshot_path, compressed_snapshot_with_size).unwrap();
println!("Snapshot written to: {} ", snapshot_path.display());
}
#[derive(Debug, Deserialize)]
struct LoadArgs {
/// The fully qualified specifier that should be loaded.
specifier: String,
}
fn tsc_snapshot_init() -> Extension {
// libs that are being provided by op crates.
let mut op_crate_libs = HashMap::new();
op_crate_libs.insert("deno.console", deno_console::get_declaration());
op_crate_libs.insert("deno.url", deno_url::get_declaration());
op_crate_libs.insert("deno.web", deno_web::get_declaration());
op_crate_libs.insert("deno.fetch", deno_fetch::get_declaration());
op_crate_libs.insert("deno.webgpu", deno_webgpu_get_declaration());
op_crate_libs.insert("deno.websocket", deno_websocket::get_declaration());
op_crate_libs.insert("deno.webstorage", deno_webstorage::get_declaration());
op_crate_libs.insert("deno.crypto", deno_crypto::get_declaration());
op_crate_libs.insert(
"deno.broadcast_channel",
deno_broadcast_channel::get_declaration(),
);
op_crate_libs.insert("deno.net", deno_net::get_declaration());
// ensure we invalidate the build properly.
for (_, path) in op_crate_libs.iter() {
println!("cargo:rerun-if-changed={}", path.display());
}
// libs that should be loaded into the isolate before snapshotting.
let libs = vec![
// Deno custom type libraries
"deno.window",
"deno.worker",
"deno.shared_globals",
"deno.ns",
"deno.unstable",
// Deno built-in type libraries
"es5",
"es2015.collection",
"es2015.core",
"es2015",
"es2015.generator",
"es2015.iterable",
"es2015.promise",
"es2015.proxy",
"es2015.reflect",
"es2015.symbol",
"es2015.symbol.wellknown",
"es2016.array.include",
"es2016",
"es2017",
"es2017.intl",
"es2017.object",
"es2017.sharedmemory",
"es2017.string",
"es2017.typedarrays",
"es2018.asyncgenerator",
"es2018.asynciterable",
"es2018",
"es2018.intl",
"es2018.promise",
"es2018.regexp",
"es2019.array",
"es2019",
"es2019.object",
"es2019.string",
"es2019.symbol",
"es2020.bigint",
"es2020",
"es2020.date",
"es2020.intl",
"es2020.number",
"es2020.promise",
"es2020.sharedmemory",
"es2020.string",
"es2020.symbol.wellknown",
"es2021",
"es2021.intl",
"es2021.promise",
"es2021.string",
"es2021.weakref",
"es2022",
"es2022.array",
"es2022.error",
"es2022.intl",
"es2022.object",
"es2022.string",
"esnext",
"esnext.array",
"esnext.intl",
];
let cli_dir = cli_dir();
let path_dts = cli_dir.join("dts");
// ensure we invalidate the build properly.
for name in libs.iter() {
println!(
"cargo:rerun-if-changed={}",
path_dts.join(format!("lib.{}.d.ts", name)).display()
);
}
// create a copy of the vector that includes any op crate libs to be passed
// to the JavaScript compiler to build into the snapshot
let mut build_libs = libs.clone();
for (op_lib, _) in op_crate_libs.iter() {
build_libs.push(op_lib.to_owned());
}
#[op]
fn op_build_info(state: &mut OpState) -> Value {
let build_specifier = "asset:///bootstrap.ts";
let build_libs = state.borrow::<Vec<&str>>();
json!({
"buildSpecifier": build_specifier,
"libs": build_libs,
})
}
#[op]
fn op_cwd() -> String {
"cache:///".into()
}
#[op]
fn op_exists() -> bool {
false
}
#[op]
fn op_script_version(
_state: &mut OpState,
_args: Value,
) -> Result<Option<String>, AnyError> {
Ok(Some("1".to_string()))
}
#[op]
// using the same op that is used in `tsc.rs` for loading modules and reading
// files, but a slightly different implementation at build time.
fn op_load(state: &mut OpState, args: LoadArgs) -> Result<Value, AnyError> {
let op_crate_libs = state.borrow::<HashMap<&str, PathBuf>>();
let path_dts = state.borrow::<PathBuf>();
let re_asset =
Regex::new(r"asset:/{3}lib\.(\S+)\.d\.ts").expect("bad regex");
let build_specifier = "asset:///bootstrap.ts";
// we need a basic file to send to tsc to warm it up.
if args.specifier == build_specifier {
Ok(json!({
"data": r#"console.log("hello deno!");"#,
"version": "1",
// this corresponds to `ts.ScriptKind.TypeScript`
"scriptKind": 3
}))
// specifiers come across as `asset:///lib.{lib_name}.d.ts` and we need to
// parse out just the name so we can lookup the asset.
} else if let Some(caps) = re_asset.captures(&args.specifier) {
if let Some(lib) = caps.get(1).map(|m| m.as_str()) {
// if it comes from an op crate, we were supplied with the path to the
// file.
let path = if let Some(op_crate_lib) = op_crate_libs.get(lib) {
PathBuf::from(op_crate_lib).canonicalize().unwrap()
// otherwise we are will generate the path ourself
} else {
path_dts.join(format!("lib.{}.d.ts", lib))
};
let data = std::fs::read_to_string(path)?;
Ok(json!({
"data": data,
"version": "1",
// this corresponds to `ts.ScriptKind.TypeScript`
"scriptKind": 3
}))
} else {
Err(custom_error(
"InvalidSpecifier",
format!("An invalid specifier was requested: {}", args.specifier),
))
}
} else {
Err(custom_error(
"InvalidSpecifier",
format!("An invalid specifier was requested: {}", args.specifier),
))
}
}
Extension::builder()
.ops(vec![
op_build_info::decl(),
op_cwd::decl(),
op_exists::decl(),
op_load::decl(),
op_script_version::decl(),
])
.state(move |state| {
state.put(op_crate_libs.clone());
state.put(build_libs.clone());
state.put(path_dts.clone());
Ok(())
})
.build()
}
fn deno_webgpu_get_declaration() -> PathBuf {
cli_dir().join("dts").join("lib.deno_webgpu.d.ts")
}
fn load_js_files(js_runtime: &mut JsRuntime) {
let js_files = get_js_files(tsc_dir());
let cwd = cli_dir();
let display_root = cwd.parent().unwrap();
for file in js_files {
println!("cargo:rerun-if-changed={}", file.display());
let display_path = file.strip_prefix(display_root).unwrap();
let display_path_str = display_path.display().to_string();
js_runtime
.execute_script(
&("deno:".to_string() + &display_path_str.replace('\\', "/")),
&std::fs::read_to_string(&file).unwrap(),
)
.unwrap();
}
}
fn root_dir() -> PathBuf {
// TODO(nayeemrmn): https://github.com/rust-lang/cargo/issues/3946 to get the workspace root.
Path::new(env!("CARGO_MANIFEST_DIR"))
.join("..")
.canonicalize()
.unwrap()
}
fn cli_dir() -> PathBuf {
root_dir().join("cli")
}
fn tsc_dir() -> PathBuf {
cli_dir().join("tsc")
}
fn get_js_files(dir: PathBuf) -> Vec<PathBuf> {
let mut js_files = std::fs::read_dir(dir.clone())
.unwrap()
.map(|dir_entry| {
let file = dir_entry.unwrap();
dir.join(file.path())
})
.filter(|path| path.extension().unwrap_or_default() == "js")
.collect::<Vec<PathBuf>>();
js_files.sort();
js_files
}

77
snapshots/lib.rs Normal file
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@ -0,0 +1,77 @@
use deno_core::Snapshot;
use once_cell::sync::Lazy;
use std::convert::TryInto;
pub fn tsc_snapshot() -> Snapshot {
Snapshot::Static(&*COMPILER_SNAPSHOT)
}
static COMPILER_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new(
#[cold]
#[inline(never)]
|| {
static COMPRESSED_COMPILER_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
zstd::bulk::decompress(
&COMPRESSED_COMPILER_SNAPSHOT[4..],
u32::from_le_bytes(COMPRESSED_COMPILER_SNAPSHOT[0..4].try_into().unwrap())
as usize,
)
.unwrap()
.into_boxed_slice()
},
);
pub fn cli_snapshot() -> Snapshot {
Snapshot::Static(&*CLI_SNAPSHOT)
}
static CLI_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new(
#[allow(clippy::uninit_vec)]
#[cold]
#[inline(never)]
|| {
static COMPRESSED_CLI_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.bin"));
let size =
u32::from_le_bytes(COMPRESSED_CLI_SNAPSHOT[0..4].try_into().unwrap())
as usize;
let mut vec = Vec::with_capacity(size);
// SAFETY: vec is allocated with exact snapshot size (+ alignment)
// SAFETY: non zeroed bytes are overwritten with decompressed snapshot
unsafe {
vec.set_len(size);
}
lzzzz::lz4::decompress(&COMPRESSED_CLI_SNAPSHOT[4..], &mut vec).unwrap();
vec.into_boxed_slice()
},
);
#[cfg(test)]
mod tests {
use deno_runtime::deno_core;
#[test]
fn cli_snapshot() {
let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
startup_snapshot: Some(crate::cli_snapshot()),
..Default::default()
});
js_runtime
.execute_script(
"<anon>",
r#"
if (!(bootstrap.mainRuntime && bootstrap.workerRuntime)) {
throw Error("bad");
}
console.log("we have console.log!!!");
"#,
)
.unwrap();
}
}