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Code Issues Packages 1 Wiki Activity

perf(compile): pass module source data from binary directly to v8 (#26494)

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This changes denort to pass a static reference of the moude source bytes found in the binary to v8 instead of copying it.
This commit is contained in:
David Sherret 2024-10-24 15:48:48 -04:00 committed by Bartek Iwańczuk
parent 3d23be13e0
commit 4d731f5ef8
No known key found for this signature in database
GPG key ID: 0C6BCDDC3B3AD750
14 changed files with 1148 additions and 481 deletions
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35
Cargo.lock generated
View file

@ -1196,7 +1196,6 @@ dependencies = [
"dprint-plugin-markdown",
"dprint-plugin-typescript",
"env_logger",
"eszip",
"fancy-regex",
"faster-hex",
"flate2",
@ -2895,29 +2894,6 @@ version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "31ae425815400e5ed474178a7a22e275a9687086a12ca63ec793ff292d8fdae8"
[[package]]
name = "eszip"
version = "0.79.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8eb55c89bdde75a3826a79d49c9d847623ae7fbdb2695b542982982da990d33e"
dependencies = [
"anyhow",
"async-trait",
"base64 0.21.7",
"deno_ast",
"deno_graph",
"deno_npm",
"deno_semver",
"futures",
"hashlink 0.8.4",
"indexmap",
"serde",
"serde_json",
"sha2",
"thiserror",
"url",
]
[[package]]
name = "fallible-iterator"
version = "0.3.0"
@ -3529,15 +3505,6 @@ dependencies = [
"allocator-api2",
]
[[package]]
name = "hashlink"
version = "0.8.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e8094feaf31ff591f651a2664fb9cfd92bba7a60ce3197265e9482ebe753c8f7"
dependencies = [
"hashbrown",
]
[[package]]
name = "hashlink"
version = "0.9.1"
@ -5815,7 +5782,7 @@ dependencies = [
"bitflags 2.6.0",
"fallible-iterator",
"fallible-streaming-iterator",
"hashlink 0.9.1",
"hashlink",
"libsqlite3-sys",
"smallvec",
]

1
cli/Cargo.toml
View file

@ -84,7 +84,6 @@ deno_runtime = { workspace = true, features = ["include_js_files_for_snapshottin
deno_semver.workspace = true
deno_task_shell = "=0.18.1"
deno_terminal.workspace = true
eszip = "=0.79.1"
libsui = "0.4.0"
node_resolver.workspace = true

1
cli/emit.rs
View file

@ -60,6 +60,7 @@ impl Emitter {
continue;
};
// todo(https://github.com/denoland/deno_media_type/pull/12): use is_emittable()
let is_emittable = matches!(
module.media_type,
MediaType::TypeScript

1
cli/factory.rs
View file

@ -762,6 +762,7 @@ impl CliFactory {
let cli_options = self.cli_options()?;
Ok(DenoCompileBinaryWriter::new(
self.deno_dir()?,
self.emitter()?,
self.file_fetcher()?,
self.http_client_provider(),
self.npm_resolver().await?.as_ref(),

9
cli/mainrt.rs
View file

@ -88,11 +88,10 @@ fn main() {
let standalone = standalone::extract_standalone(Cow::Owned(args));
let future = async move {
match standalone {
Ok(Some(future)) => {
let (metadata, eszip) = future.await?;
util::logger::init(metadata.log_level);
load_env_vars(&metadata.env_vars_from_env_file);
let exit_code = standalone::run(eszip, metadata).await?;
Ok(Some(data)) => {
util::logger::init(data.metadata.log_level);
load_env_vars(&data.metadata.env_vars_from_env_file);
let exit_code = standalone::run(data).await?;
std::process::exit(exit_code);
}
Ok(None) => Ok(()),

463
cli/standalone/binary.rs
View file

@ -9,14 +9,18 @@ use std::ffi::OsString;
use std::fs;
use std::fs::File;
use std::future::Future;
use std::io::ErrorKind;
use std::io::Read;
use std::io::Seek;
use std::io::SeekFrom;
use std::io::Write;
use std::ops::Range;
use std::path::Path;
use std::path::PathBuf;
use std::process::Command;
use std::sync::Arc;
use deno_ast::MediaType;
use deno_ast::ModuleSpecifier;
use deno_config::workspace::PackageJsonDepResolution;
use deno_config::workspace::ResolverWorkspaceJsrPackage;
@ -30,13 +34,22 @@ use deno_core::futures::AsyncReadExt;
use deno_core::futures::AsyncSeekExt;
use deno_core::serde_json;
use deno_core::url::Url;
use deno_graph::source::RealFileSystem;
use deno_graph::ModuleGraph;
use deno_npm::resolution::SerializedNpmResolutionSnapshot;
use deno_npm::resolution::SerializedNpmResolutionSnapshotPackage;
use deno_npm::resolution::ValidSerializedNpmResolutionSnapshot;
use deno_npm::NpmPackageId;
use deno_npm::NpmSystemInfo;
use deno_runtime::deno_fs;
use deno_runtime::deno_fs::FileSystem;
use deno_runtime::deno_fs::RealFs;
use deno_runtime::deno_io::fs::FsError;
use deno_runtime::deno_node::PackageJson;
use deno_semver::npm::NpmVersionReqParseError;
use deno_semver::package::PackageReq;
use deno_semver::Version;
use deno_semver::VersionReqSpecifierParseError;
use eszip::EszipRelativeFileBaseUrl;
use indexmap::IndexMap;
use log::Level;
use serde::Deserialize;
@ -49,6 +62,7 @@ use crate::args::NpmInstallDepsProvider;
use crate::args::PermissionFlags;
use crate::args::UnstableConfig;
use crate::cache::DenoDir;
use crate::emit::Emitter;
use crate::file_fetcher::FileFetcher;
use crate::http_util::HttpClientProvider;
use crate::npm::CliNpmResolver;
@ -60,12 +74,63 @@ use crate::util::fs::canonicalize_path_maybe_not_exists;
use crate::util::progress_bar::ProgressBar;
use crate::util::progress_bar::ProgressBarStyle;
use super::file_system::DenoCompileFileSystem;
use super::serialization::deserialize_binary_data_section;
use super::serialization::serialize_binary_data_section;
use super::serialization::DenoCompileModuleData;
use super::serialization::DeserializedDataSection;
use super::serialization::RemoteModulesStore;
use super::serialization::RemoteModulesStoreBuilder;
use super::virtual_fs::FileBackedVfs;
use super::virtual_fs::VfsBuilder;
use super::virtual_fs::VfsRoot;
use super::virtual_fs::VirtualDirectory;
const MAGIC_TRAILER: &[u8; 8] = b"d3n0l4nd";
/// A URL that can be designated as the base for relative URLs.
///
/// After creation, this URL may be used to get the key for a
/// module in the binary.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct StandaloneRelativeFileBaseUrl<'a>(&'a Url);
impl<'a> From<&'a Url> for StandaloneRelativeFileBaseUrl<'a> {
fn from(url: &'a Url) -> Self {
Self(url)
}
}
impl<'a> StandaloneRelativeFileBaseUrl<'a> {
pub fn new(url: &'a Url) -> Self {
debug_assert_eq!(url.scheme(), "file");
Self(url)
}
/// Gets the module map key of the provided specifier.
///
/// * Descendant file specifiers will be made relative to the base.
/// * Non-descendant file specifiers will stay as-is (absolute).
/// * Non-file specifiers will stay as-is.
pub fn specifier_key<'b>(&self, target: &'b Url) -> Cow<'b, str> {
if target.scheme() != "file" {
return Cow::Borrowed(target.as_str());
}
match self.0.make_relative(target) {
Some(relative) => {
if relative.starts_with("../") {
Cow::Borrowed(target.as_str())
} else {
Cow::Owned(relative)
}
}
None => Cow::Borrowed(target.as_str()),
}
}
pub fn inner(&self) -> &Url {
self.0
}
}
#[derive(Deserialize, Serialize)]
pub enum NodeModules {
@ -120,78 +185,23 @@ pub struct Metadata {
pub unstable_config: UnstableConfig,
}
pub fn load_npm_vfs(root_dir_path: PathBuf) -> Result<FileBackedVfs, AnyError> {
let data = libsui::find_section("d3n0l4nd").unwrap();
// We do the first part sync so it can complete quickly
let trailer: [u8; TRAILER_SIZE] = data[0..TRAILER_SIZE].try_into().unwrap();
let trailer = match Trailer::parse(&trailer)? {
None => panic!("Could not find trailer"),
Some(trailer) => trailer,
};
let data = &data[TRAILER_SIZE..];
let vfs_data =
&data[trailer.npm_vfs_pos as usize..trailer.npm_files_pos as usize];
let mut dir: VirtualDirectory = serde_json::from_slice(vfs_data)?;
// align the name of the directory with the root dir
dir.name = root_dir_path
.file_name()
.unwrap()
.to_string_lossy()
.to_string();
let fs_root = VfsRoot {
dir,
root_path: root_dir_path,
start_file_offset: trailer.npm_files_pos,
};
Ok(FileBackedVfs::new(data.to_vec(), fs_root))
}
fn write_binary_bytes(
mut file_writer: File,
original_bin: Vec<u8>,
metadata: &Metadata,
eszip: eszip::EszipV2,
npm_vfs: Option<&VirtualDirectory>,
npm_files: &Vec<Vec<u8>>,
npm_snapshot: Option<SerializedNpmResolutionSnapshot>,
remote_modules: &RemoteModulesStoreBuilder,
vfs: VfsBuilder,
compile_flags: &CompileFlags,
) -> Result<(), AnyError> {
let metadata = serde_json::to_string(metadata)?.as_bytes().to_vec();
let npm_vfs = serde_json::to_string(&npm_vfs)?.as_bytes().to_vec();
let eszip_archive = eszip.into_bytes();
let mut writer = Vec::new();
// write the trailer, which includes the positions
// of the data blocks in the file
writer.write_all(&{
let metadata_pos = eszip_archive.len() as u64;
let npm_vfs_pos = metadata_pos + (metadata.len() as u64);
let npm_files_pos = npm_vfs_pos + (npm_vfs.len() as u64);
Trailer {
eszip_pos: 0,
metadata_pos,
npm_vfs_pos,
npm_files_pos,
}
.as_bytes()
})?;
writer.write_all(&eszip_archive)?;
writer.write_all(&metadata)?;
writer.write_all(&npm_vfs)?;
for file in npm_files {
writer.write_all(file)?;
}
let data_section_bytes =
serialize_binary_data_section(metadata, npm_snapshot, remote_modules, vfs)?;
let target = compile_flags.resolve_target();
if target.contains("linux") {
libsui::Elf::new(&original_bin).append(
"d3n0l4nd",
&writer,
&data_section_bytes,
&mut file_writer,
)?;
} else if target.contains("windows") {
@ -201,11 +211,11 @@ fn write_binary_bytes(
pe = pe.set_icon(&icon)?;
}
pe.write_resource("d3n0l4nd", writer)?
pe.write_resource("d3n0l4nd", data_section_bytes)?
.build(&mut file_writer)?;
} else if target.contains("darwin") {
libsui::Macho::from(original_bin)?
.write_section("d3n0l4nd", writer)?
.write_section("d3n0l4nd", data_section_bytes)?
.build_and_sign(&mut file_writer)?;
}
Ok(())
@ -221,6 +231,63 @@ pub fn is_standalone_binary(exe_path: &Path) -> bool {
|| libsui::utils::is_macho(&data)
}
pub struct StandaloneData {
pub fs: Arc<dyn deno_fs::FileSystem>,
pub metadata: Metadata,
pub modules: StandaloneModules,
pub npm_snapshot: Option<ValidSerializedNpmResolutionSnapshot>,
pub root_path: PathBuf,
pub vfs: Arc<FileBackedVfs>,
}
pub struct StandaloneModules {
remote_modules: RemoteModulesStore,
vfs: Arc<FileBackedVfs>,
}
impl StandaloneModules {
pub fn resolve_specifier<'a>(
&'a self,
specifier: &'a ModuleSpecifier,
) -> Result<Option<&'a ModuleSpecifier>, AnyError> {
if specifier.scheme() == "file" {
Ok(Some(specifier))
} else {
self.remote_modules.resolve_specifier(specifier)
}
}
pub fn read<'a>(
&'a self,
specifier: &'a ModuleSpecifier,
) -> Result<Option<DenoCompileModuleData<'a>>, AnyError> {
if specifier.scheme() == "file" {
let path = deno_path_util::url_to_file_path(specifier)?;
let bytes = match self.vfs.file_entry(&path) {
Ok(entry) => self.vfs.read_file_all(entry)?,
Err(err) if err.kind() == ErrorKind::NotFound => {
let bytes = match RealFs.read_file_sync(&path, None) {
Ok(bytes) => bytes,
Err(FsError::Io(err)) if err.kind() == ErrorKind::NotFound => {
return Ok(None)
}
Err(err) => return Err(err.into()),
};
Cow::Owned(bytes)
}
Err(err) => return Err(err.into()),
};
Ok(Some(DenoCompileModuleData {
media_type: MediaType::from_specifier(specifier),
specifier,
data: bytes,
}))
} else {
self.remote_modules.read(specifier)
}
}
}
/// This function will try to run this binary as a standalone binary
/// produced by `deno compile`. It determines if this is a standalone
/// binary by skipping over the trailer width at the end of the file,
@ -228,110 +295,66 @@ pub fn is_standalone_binary(exe_path: &Path) -> bool {
/// the bundle is executed. If not, this function exits with `Ok(None)`.
pub fn extract_standalone(
cli_args: Cow<Vec<OsString>>,
) -> Result<
Option<impl Future<Output = Result<(Metadata, eszip::EszipV2), AnyError>>>,
AnyError,
> {
) -> Result<Option<StandaloneData>, AnyError> {
let Some(data) = libsui::find_section("d3n0l4nd") else {
return Ok(None);
};
// We do the first part sync so it can complete quickly
let trailer = match Trailer::parse(&data[0..TRAILER_SIZE])? {
let DeserializedDataSection {
mut metadata,
npm_snapshot,
remote_modules,
mut vfs_dir,
vfs_files_data,
} = match deserialize_binary_data_section(data)? {
Some(data_section) => data_section,
None => return Ok(None),
Some(trailer) => trailer,
};
let root_path = {
let maybe_current_exe = std::env::current_exe().ok();
let current_exe_name = maybe_current_exe
.as_ref()
.and_then(|p| p.file_name())
.map(|p| p.to_string_lossy())
// should never happen
.unwrap_or_else(|| Cow::Borrowed("binary"));
std::env::temp_dir().join(format!("deno-compile-{}", current_exe_name))
};
let cli_args = cli_args.into_owned();
// If we have an eszip, read it out
Ok(Some(async move {
let bufreader =
deno_core::futures::io::BufReader::new(&data[TRAILER_SIZE..]);
metadata.argv.reserve(cli_args.len() - 1);
for arg in cli_args.into_iter().skip(1) {
metadata.argv.push(arg.into_string().unwrap());
}
let vfs = {
// align the name of the directory with the root dir
vfs_dir.name = root_path.file_name().unwrap().to_string_lossy().to_string();
let (eszip, loader) = eszip::EszipV2::parse(bufreader)
.await
.context("Failed to parse eszip header")?;
let bufreader = loader.await.context("Failed to parse eszip archive")?;
let mut metadata = String::new();
bufreader
.take(trailer.metadata_len())
.read_to_string(&mut metadata)
.await
.context("Failed to read metadata from the current executable")?;
let mut metadata: Metadata = serde_json::from_str(&metadata).unwrap();
metadata.argv.reserve(cli_args.len() - 1);
for arg in cli_args.into_iter().skip(1) {
metadata.argv.push(arg.into_string().unwrap());
}
Ok((metadata, eszip))
let fs_root = VfsRoot {
dir: vfs_dir,
root_path: root_path.clone(),
start_file_offset: 0,
};
Arc::new(FileBackedVfs::new(Cow::Borrowed(vfs_files_data), fs_root))
};
let fs: Arc<dyn deno_fs::FileSystem> =
Arc::new(DenoCompileFileSystem::new(vfs.clone()));
Ok(Some(StandaloneData {
fs,
metadata,
modules: StandaloneModules {
remote_modules,
vfs: vfs.clone(),
},
npm_snapshot,
root_path,
vfs,
}))
}
const TRAILER_SIZE: usize = std::mem::size_of::<Trailer>() + 8; // 8 bytes for the magic trailer string
struct Trailer {
eszip_pos: u64,
metadata_pos: u64,
npm_vfs_pos: u64,
npm_files_pos: u64,
}
impl Trailer {
pub fn parse(trailer: &[u8]) -> Result<Option<Trailer>, AnyError> {
let (magic_trailer, rest) = trailer.split_at(8);
if magic_trailer != MAGIC_TRAILER {
return Ok(None);
}
let (eszip_archive_pos, rest) = rest.split_at(8);
let (metadata_pos, rest) = rest.split_at(8);
let (npm_vfs_pos, npm_files_pos) = rest.split_at(8);
let eszip_archive_pos = u64_from_bytes(eszip_archive_pos)?;
let metadata_pos = u64_from_bytes(metadata_pos)?;
let npm_vfs_pos = u64_from_bytes(npm_vfs_pos)?;
let npm_files_pos = u64_from_bytes(npm_files_pos)?;
Ok(Some(Trailer {
eszip_pos: eszip_archive_pos,
metadata_pos,
npm_vfs_pos,
npm_files_pos,
}))
}
pub fn metadata_len(&self) -> u64 {
self.npm_vfs_pos - self.metadata_pos
}
pub fn npm_vfs_len(&self) -> u64 {
self.npm_files_pos - self.npm_vfs_pos
}
pub fn as_bytes(&self) -> Vec<u8> {
let mut trailer = MAGIC_TRAILER.to_vec();
trailer.write_all(&self.eszip_pos.to_be_bytes()).unwrap();
trailer.write_all(&self.metadata_pos.to_be_bytes()).unwrap();
trailer.write_all(&self.npm_vfs_pos.to_be_bytes()).unwrap();
trailer
.write_all(&self.npm_files_pos.to_be_bytes())
.unwrap();
trailer
}
}
fn u64_from_bytes(arr: &[u8]) -> Result<u64, AnyError> {
let fixed_arr: &[u8; 8] = arr
.try_into()
.context("Failed to convert the buffer into a fixed-size array")?;
Ok(u64::from_be_bytes(*fixed_arr))
}
pub struct DenoCompileBinaryWriter<'a> {
deno_dir: &'a DenoDir,
emitter: &'a Emitter,
file_fetcher: &'a FileFetcher,
http_client_provider: &'a HttpClientProvider,
npm_resolver: &'a dyn CliNpmResolver,
@ -343,6 +366,7 @@ impl<'a> DenoCompileBinaryWriter<'a> {
#[allow(clippy::too_many_arguments)]
pub fn new(
deno_dir: &'a DenoDir,
emitter: &'a Emitter,
file_fetcher: &'a FileFetcher,
http_client_provider: &'a HttpClientProvider,
npm_resolver: &'a dyn CliNpmResolver,
@ -351,6 +375,7 @@ impl<'a> DenoCompileBinaryWriter<'a> {
) -> Self {
Self {
deno_dir,
emitter,
file_fetcher,
http_client_provider,
npm_resolver,
@ -362,8 +387,8 @@ impl<'a> DenoCompileBinaryWriter<'a> {
pub async fn write_bin(
&self,
writer: File,
eszip: eszip::EszipV2,
root_dir_url: EszipRelativeFileBaseUrl<'_>,
graph: &ModuleGraph,
root_dir_url: StandaloneRelativeFileBaseUrl<'_>,
entrypoint: &ModuleSpecifier,
compile_flags: &CompileFlags,
cli_options: &CliOptions,
@ -390,15 +415,17 @@ impl<'a> DenoCompileBinaryWriter<'a> {
)
}
}
self.write_standalone_binary(
writer,
original_binary,
eszip,
root_dir_url,
entrypoint,
cli_options,
compile_flags,
)
self
.write_standalone_binary(
writer,
original_binary,
graph,
root_dir_url,
entrypoint,
cli_options,
compile_flags,
)
.await
}
async fn get_base_binary(
@ -493,12 +520,12 @@ impl<'a> DenoCompileBinaryWriter<'a> {
/// This functions creates a standalone deno binary by appending a bundle
/// and magic trailer to the currently executing binary.
#[allow(clippy::too_many_arguments)]
fn write_standalone_binary(
async fn write_standalone_binary(
&self,
writer: File,
original_bin: Vec<u8>,
mut eszip: eszip::EszipV2,
root_dir_url: EszipRelativeFileBaseUrl<'_>,
graph: &ModuleGraph,
root_dir_url: StandaloneRelativeFileBaseUrl<'_>,
entrypoint: &ModuleSpecifier,
cli_options: &CliOptions,
compile_flags: &CompileFlags,
@ -512,19 +539,17 @@ impl<'a> DenoCompileBinaryWriter<'a> {
None => None,
};
let root_path = root_dir_url.inner().to_file_path().unwrap();
let (npm_vfs, npm_files, node_modules) = match self.npm_resolver.as_inner()
let (maybe_npm_vfs, node_modules, npm_snapshot) = match self
.npm_resolver
.as_inner()
{
InnerCliNpmResolverRef::Managed(managed) => {
let snapshot =
managed.serialized_valid_snapshot_for_system(&self.npm_system_info);
if !snapshot.as_serialized().packages.is_empty() {
let (root_dir, files) = self
.build_vfs(&root_path, cli_options)?
.into_dir_and_files();
eszip.add_npm_snapshot(snapshot);
let npm_vfs_builder = self.build_npm_vfs(&root_path, cli_options)?;
(
Some(root_dir),
files,
Some(npm_vfs_builder),
Some(NodeModules::Managed {
node_modules_dir: self.npm_resolver.root_node_modules_path().map(
|path| {
@ -536,18 +561,16 @@ impl<'a> DenoCompileBinaryWriter<'a> {
},
),
}),
Some(snapshot),
)
} else {
(None, Vec::new(), None)
(None, None, None)
}
}
InnerCliNpmResolverRef::Byonm(resolver) => {
let (root_dir, files) = self
.build_vfs(&root_path, cli_options)?
.into_dir_and_files();
let npm_vfs_builder = self.build_npm_vfs(&root_path, cli_options)?;
(
Some(root_dir),
files,
Some(npm_vfs_builder),
Some(NodeModules::Byonm {
root_node_modules_dir: resolver.root_node_modules_path().map(
|node_modules_dir| {
@ -560,9 +583,67 @@ impl<'a> DenoCompileBinaryWriter<'a> {
},
),
}),
None,
)
}
};
let mut vfs = if let Some(npm_vfs) = maybe_npm_vfs {
npm_vfs
} else {
VfsBuilder::new(root_path.clone())?
};
let mut remote_modules_store = RemoteModulesStoreBuilder::default();
for module in graph.modules() {
if module.specifier().scheme() == "data" {
continue; // don't store data urls as an entry as they're in the code
}
let (maybe_source, media_type) = match module {
deno_graph::Module::Js(m) => {
// todo(https://github.com/denoland/deno_media_type/pull/12): use is_emittable()
let is_emittable = matches!(
m.media_type,
MediaType::TypeScript
| MediaType::Mts
| MediaType::Cts
| MediaType::Jsx
| MediaType::Tsx
);
let source = if is_emittable {
let source = self
.emitter
.emit_parsed_source(&m.specifier, m.media_type, &m.source)
.await?;
source.to_vec()
} else {
m.source.as_bytes().to_vec()
};
(Some(source), m.media_type)
}
deno_graph::Module::Json(m) => {
(Some(m.source.as_bytes().to_vec()), m.media_type)
}
deno_graph::Module::Npm(_)
| deno_graph::Module::Node(_)
| deno_graph::Module::External(_) => (None, MediaType::Unknown),
};
if module.specifier().scheme() == "file" {
let file_path = deno_path_util::url_to_file_path(module.specifier())?;
vfs
.add_file_with_data(
&file_path,
match maybe_source {
Some(source) => source,
None => RealFs.read_file_sync(&file_path, None)?,
},
)
.with_context(|| {
format!("Failed adding '{}'", file_path.display())
})?;
} else if let Some(source) = maybe_source {
remote_modules_store.add(module.specifier(), media_type, source);
}
}
remote_modules_store.add_redirects(&graph.redirects);
let env_vars_from_env_file = match cli_options.env_file_name() {
Some(env_filename) => {
@ -636,14 +717,14 @@ impl<'a> DenoCompileBinaryWriter<'a> {
writer,
original_bin,
&metadata,
eszip,
npm_vfs.as_ref(),
&npm_files,
npm_snapshot.map(|s| s.into_serialized()),
&remote_modules_store,
vfs,
compile_flags,
)
}
fn build_vfs(
fn build_npm_vfs(
&self,
root_path: &Path,
cli_options: &CliOptions,
@ -664,8 +745,8 @@ impl<'a> DenoCompileBinaryWriter<'a> {
} else {
// DO NOT include the user's registry url as it may contain credentials,
// but also don't make this dependent on the registry url
let root_path = npm_resolver.global_cache_root_folder();
let mut builder = VfsBuilder::new(root_path)?;
let global_cache_root_path = npm_resolver.global_cache_root_folder();
let mut builder = VfsBuilder::new(global_cache_root_path)?;
let mut packages =
npm_resolver.all_system_packages(&self.npm_system_info);
packages.sort_by(|a, b| a.id.cmp(&b.id)); // determinism
@ -675,12 +756,12 @@ impl<'a> DenoCompileBinaryWriter<'a> {
builder.add_dir_recursive(&folder)?;
}
// Flatten all the registries folders into a single "node_modules/localhost" folder
// Flatten all the registries folders into a single ".deno_compile_node_modules/localhost" folder
// that will be used by denort when loading the npm cache. This avoids us exposing
// the user's private registry information and means we don't have to bother
// serializing all the different registry config into the binary.
builder.with_root_dir(|root_dir| {
root_dir.name = "node_modules".to_string();
root_dir.name = ".deno_compile_node_modules".to_string();
let mut new_entries = Vec::with_capacity(root_dir.entries.len());
let mut localhost_entries = IndexMap::new();
for entry in std::mem::take(&mut root_dir.entries) {
@ -715,6 +796,8 @@ impl<'a> DenoCompileBinaryWriter<'a> {
root_dir.entries = new_entries;
});
builder.set_new_root_path(root_path.to_path_buf())?;
Ok(builder)
}
}

4
cli/standalone/file_system.rs
View file

@ -22,8 +22,8 @@ use super::virtual_fs::FileBackedVfs;
pub struct DenoCompileFileSystem(Arc<FileBackedVfs>);
impl DenoCompileFileSystem {
pub fn new(vfs: FileBackedVfs) -> Self {
Self(Arc::new(vfs))
pub fn new(vfs: Arc<FileBackedVfs>) -> Self {
Self(vfs)
}
fn error_if_in_vfs(&self, path: &Path) -> FsResult<()> {

308
cli/standalone/mod.rs
View file

@ -5,6 +5,8 @@
#![allow(dead_code)]
#![allow(unused_imports)]
use binary::StandaloneData;
use binary::StandaloneModules;
use deno_ast::MediaType;
use deno_cache_dir::npm::NpmCacheDir;
use deno_config::workspace::MappedResolution;
@ -38,7 +40,6 @@ use deno_runtime::permissions::RuntimePermissionDescriptorParser;
use deno_runtime::WorkerExecutionMode;
use deno_runtime::WorkerLogLevel;
use deno_semver::npm::NpmPackageReqReference;
use eszip::EszipRelativeFileBaseUrl;
use import_map::parse_from_json;
use node_resolver::analyze::NodeCodeTranslator;
use node_resolver::NodeResolutionMode;
@ -54,6 +55,7 @@ use crate::args::CacheSetting;
use crate::args::NpmInstallDepsProvider;
use crate::args::StorageKeyResolver;
use crate::cache::Caches;
use crate::cache::DenoCacheEnvFsAdapter;
use crate::cache::DenoDirProvider;
use crate::cache::NodeAnalysisCache;
use crate::cache::RealDenoCacheEnv;
@ -78,52 +80,18 @@ use crate::worker::ModuleLoaderFactory;
pub mod binary;
mod file_system;
mod serialization;
mod virtual_fs;
pub use binary::extract_standalone;
pub use binary::is_standalone_binary;
pub use binary::DenoCompileBinaryWriter;
use self::binary::load_npm_vfs;
use self::binary::Metadata;
use self::file_system::DenoCompileFileSystem;
struct WorkspaceEszipModule {
specifier: ModuleSpecifier,
inner: eszip::Module,
}
struct WorkspaceEszip {
eszip: eszip::EszipV2,
root_dir_url: Arc<ModuleSpecifier>,
}
impl WorkspaceEszip {
pub fn get_module(
&self,
specifier: &ModuleSpecifier,
) -> Option<WorkspaceEszipModule> {
if specifier.scheme() == "file" {
let specifier_key = EszipRelativeFileBaseUrl::new(&self.root_dir_url)
.specifier_key(specifier);
let module = self.eszip.get_module(&specifier_key)?;
let specifier = self.root_dir_url.join(&module.specifier).unwrap();
Some(WorkspaceEszipModule {
specifier,
inner: module,
})
} else {
let module = self.eszip.get_module(specifier.as_str())?;
Some(WorkspaceEszipModule {
specifier: ModuleSpecifier::parse(&module.specifier).unwrap(),
inner: module,
})
}
}
}
struct SharedModuleLoaderState {
eszip: WorkspaceEszip,
modules: StandaloneModules,
workspace_resolver: WorkspaceResolver,
node_resolver: Arc<CliNodeResolver>,
npm_module_loader: Arc<NpmModuleLoader>,
@ -249,8 +217,10 @@ impl ModuleLoader for EmbeddedModuleLoader {
}
if specifier.scheme() == "jsr" {
if let Some(module) = self.shared.eszip.get_module(&specifier) {
return Ok(module.specifier);
if let Some(specifier) =
self.shared.modules.resolve_specifier(&specifier)?
{
return Ok(specifier.clone());
}
}
@ -345,56 +315,30 @@ impl ModuleLoader for EmbeddedModuleLoader {
);
}
let Some(module) = self.shared.eszip.get_module(original_specifier) else {
return deno_core::ModuleLoadResponse::Sync(Err(type_error(format!(
"{MODULE_NOT_FOUND}: {}",
original_specifier
))));
};
let original_specifier = original_specifier.clone();
deno_core::ModuleLoadResponse::Async(
async move {
let code = module.inner.source().await.ok_or_else(|| {
type_error(format!("Module not found: {}", original_specifier))
})?;
let code = arc_u8_to_arc_str(code)
.map_err(|_| type_error("Module source is not utf-8"))?;
Ok(deno_core::ModuleSource::new_with_redirect(
match module.inner.kind {
eszip::ModuleKind::JavaScript => ModuleType::JavaScript,
eszip::ModuleKind::Json => ModuleType::Json,
eszip::ModuleKind::Jsonc => {
return Err(type_error("jsonc modules not supported"))
}
eszip::ModuleKind::OpaqueData => {
unreachable!();
}
},
ModuleSourceCode::String(code.into()),
&original_specifier,
&module.specifier,
None,
match self.shared.modules.read(original_specifier) {
Ok(Some(module)) => {
let (module_specifier, module_type, module_source) =
module.into_for_v8();
deno_core::ModuleLoadResponse::Sync(Ok(
deno_core::ModuleSource::new_with_redirect(
module_type,
module_source,
original_specifier,
module_specifier,
None,
),
))
}
.boxed_local(),
)
Ok(None) => deno_core::ModuleLoadResponse::Sync(Err(type_error(
format!("{MODULE_NOT_FOUND}: {}", original_specifier),
))),
Err(err) => deno_core::ModuleLoadResponse::Sync(Err(type_error(
format!("{:?}", err),
))),
}
}
}
fn arc_u8_to_arc_str(
arc_u8: Arc<[u8]>,
) -> Result<Arc<str>, std::str::Utf8Error> {
// Check that the string is valid UTF-8.
std::str::from_utf8(&arc_u8)?;
// SAFETY: the string is valid UTF-8, and the layout Arc<[u8]> is the same as
// Arc<str>. This is proven by the From<Arc<str>> impl for Arc<[u8]> from the
// standard library.
Ok(unsafe {
std::mem::transmute::<std::sync::Arc<[u8]>, std::sync::Arc<str>>(arc_u8)
})
}
struct StandaloneModuleLoaderFactory {
shared: Arc<SharedModuleLoaderState>,
}
@ -439,13 +383,15 @@ impl RootCertStoreProvider for StandaloneRootCertStoreProvider {
}
}
pub async fn run(
mut eszip: eszip::EszipV2,
metadata: Metadata,
) -> Result<i32, AnyError> {
let current_exe_path = std::env::current_exe().unwrap();
let current_exe_name =
current_exe_path.file_name().unwrap().to_string_lossy();
pub async fn run(data: StandaloneData) -> Result<i32, AnyError> {
let StandaloneData {
fs,
metadata,
modules,
npm_snapshot,
root_path,
vfs,
} = data;
let deno_dir_provider = Arc::new(DenoDirProvider::new(None));
let root_cert_store_provider = Arc::new(StandaloneRootCertStoreProvider {
ca_stores: metadata.ca_stores,
@ -459,112 +405,83 @@ pub async fn run(
));
// use a dummy npm registry url
let npm_registry_url = ModuleSpecifier::parse("https://localhost/").unwrap();
let root_path =
std::env::temp_dir().join(format!("deno-compile-{}", current_exe_name));
let root_dir_url =
Arc::new(ModuleSpecifier::from_directory_path(&root_path).unwrap());
let main_module = root_dir_url.join(&metadata.entrypoint_key).unwrap();
let root_node_modules_path = root_path.join("node_modules");
let npm_cache_dir = NpmCacheDir::new(
&RealDenoCacheEnv,
root_node_modules_path.clone(),
vec![npm_registry_url.clone()],
);
let npm_global_cache_dir = npm_cache_dir.get_cache_location();
let npm_global_cache_dir = root_path.join(".deno_compile_node_modules");
let cache_setting = CacheSetting::Only;
let (fs, npm_resolver, maybe_vfs_root) = match metadata.node_modules {
let npm_resolver = match metadata.node_modules {
Some(binary::NodeModules::Managed { node_modules_dir }) => {
// this will always have a snapshot
let snapshot = eszip.take_npm_snapshot().unwrap();
let vfs_root_dir_path = if node_modules_dir.is_some() {
root_path.clone()
} else {
npm_cache_dir.root_dir().to_owned()
};
let vfs = load_npm_vfs(vfs_root_dir_path.clone())
.context("Failed to load npm vfs.")?;
let snapshot = npm_snapshot.unwrap();
let maybe_node_modules_path = node_modules_dir
.map(|node_modules_dir| vfs_root_dir_path.join(node_modules_dir));
let fs = Arc::new(DenoCompileFileSystem::new(vfs))
as Arc<dyn deno_fs::FileSystem>;
let npm_resolver =
create_cli_npm_resolver(CliNpmResolverCreateOptions::Managed(
CliNpmResolverManagedCreateOptions {
snapshot: CliNpmResolverManagedSnapshotOption::Specified(Some(
snapshot,
)),
maybe_lockfile: None,
fs: fs.clone(),
http_client_provider: http_client_provider.clone(),
npm_global_cache_dir,
cache_setting,
text_only_progress_bar: progress_bar,
maybe_node_modules_path,
npm_system_info: Default::default(),
npm_install_deps_provider: Arc::new(
// this is only used for installing packages, which isn't necessary with deno compile
NpmInstallDepsProvider::empty(),
),
// create an npmrc that uses the fake npm_registry_url to resolve packages
npmrc: Arc::new(ResolvedNpmRc {
default_config: deno_npm::npm_rc::RegistryConfigWithUrl {
registry_url: npm_registry_url.clone(),
config: Default::default(),
},
scopes: Default::default(),
registry_configs: Default::default(),
}),
lifecycle_scripts: Default::default(),
},
))
.await?;
(fs, npm_resolver, Some(vfs_root_dir_path))
.map(|node_modules_dir| root_path.join(node_modules_dir));
create_cli_npm_resolver(CliNpmResolverCreateOptions::Managed(
CliNpmResolverManagedCreateOptions {
snapshot: CliNpmResolverManagedSnapshotOption::Specified(Some(
snapshot,
)),
maybe_lockfile: None,
fs: fs.clone(),
http_client_provider: http_client_provider.clone(),
npm_global_cache_dir,
cache_setting,
text_only_progress_bar: progress_bar,
maybe_node_modules_path,
npm_system_info: Default::default(),
npm_install_deps_provider: Arc::new(
// this is only used for installing packages, which isn't necessary with deno compile
NpmInstallDepsProvider::empty(),
),
// create an npmrc that uses the fake npm_registry_url to resolve packages
npmrc: Arc::new(ResolvedNpmRc {
default_config: deno_npm::npm_rc::RegistryConfigWithUrl {
registry_url: npm_registry_url.clone(),
config: Default::default(),
},
scopes: Default::default(),
registry_configs: Default::default(),
}),
lifecycle_scripts: Default::default(),
},
))
.await?
}
Some(binary::NodeModules::Byonm {
root_node_modules_dir,
}) => {
let vfs_root_dir_path = root_path.clone();
let vfs = load_npm_vfs(vfs_root_dir_path.clone())
.context("Failed to load vfs.")?;
let root_node_modules_dir =
root_node_modules_dir.map(|p| vfs.root().join(p));
let fs = Arc::new(DenoCompileFileSystem::new(vfs))
as Arc<dyn deno_fs::FileSystem>;
let npm_resolver = create_cli_npm_resolver(
CliNpmResolverCreateOptions::Byonm(CliByonmNpmResolverCreateOptions {
create_cli_npm_resolver(CliNpmResolverCreateOptions::Byonm(
CliByonmNpmResolverCreateOptions {
fs: CliDenoResolverFs(fs.clone()),
root_node_modules_dir,
}),
)
.await?;
(fs, npm_resolver, Some(vfs_root_dir_path))
},
))
.await?
}
None => {
let fs = Arc::new(deno_fs::RealFs) as Arc<dyn deno_fs::FileSystem>;
let npm_resolver =
create_cli_npm_resolver(CliNpmResolverCreateOptions::Managed(
CliNpmResolverManagedCreateOptions {
snapshot: CliNpmResolverManagedSnapshotOption::Specified(None),
maybe_lockfile: None,
fs: fs.clone(),
http_client_provider: http_client_provider.clone(),
npm_global_cache_dir,
cache_setting,
text_only_progress_bar: progress_bar,
maybe_node_modules_path: None,
npm_system_info: Default::default(),
npm_install_deps_provider: Arc::new(
// this is only used for installing packages, which isn't necessary with deno compile
NpmInstallDepsProvider::empty(),
),
// Packages from different registries are already inlined in the ESZip,
// so no need to create actual `.npmrc` configuration.
npmrc: create_default_npmrc(),
lifecycle_scripts: Default::default(),
},
))
.await?;
(fs, npm_resolver, None)
create_cli_npm_resolver(CliNpmResolverCreateOptions::Managed(
CliNpmResolverManagedCreateOptions {
snapshot: CliNpmResolverManagedSnapshotOption::Specified(None),
maybe_lockfile: None,
fs: fs.clone(),
http_client_provider: http_client_provider.clone(),
npm_global_cache_dir,
cache_setting,
text_only_progress_bar: progress_bar,
maybe_node_modules_path: None,
npm_system_info: Default::default(),
npm_install_deps_provider: Arc::new(
// this is only used for installing packages, which isn't necessary with deno compile
NpmInstallDepsProvider::empty(),
),
// Packages from different registries are already inlined in the binary,
// so no need to create actual `.npmrc` configuration.
npmrc: create_default_npmrc(),
lifecycle_scripts: Default::default(),
},
))
.await?
}
};
@ -645,10 +562,7 @@ pub async fn run(
};
let module_loader_factory = StandaloneModuleLoaderFactory {
shared: Arc::new(SharedModuleLoaderState {
eszip: WorkspaceEszip {
eszip,
root_dir_url,
},
modules,
workspace_resolver,
node_resolver: cli_node_resolver.clone(),
npm_module_loader: Arc::new(NpmModuleLoader::new(
@ -663,19 +577,17 @@ pub async fn run(
let permissions = {
let mut permissions =
metadata.permissions.to_options(/* cli_arg_urls */ &[]);
// if running with an npm vfs, grant read access to it
if let Some(vfs_root) = maybe_vfs_root {
match &mut permissions.allow_read {
Some(vec) if vec.is_empty() => {
// do nothing, already granted
}
Some(vec) => {
vec.push(vfs_root.to_string_lossy().to_string());
}
None => {
permissions.allow_read =
Some(vec![vfs_root.to_string_lossy().to_string()]);
}
// grant read access to the vfs
match &mut permissions.allow_read {
Some(vec) if vec.is_empty() => {
// do nothing, already granted
}
Some(vec) => {
vec.push(root_path.to_string_lossy().to_string());
}
None => {
permissions.allow_read =
Some(vec![root_path.to_string_lossy().to_string()]);
}
}

642
cli/standalone/serialization.rs Normal file
View file

@ -0,0 +1,642 @@
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use std::borrow::Cow;
use std::collections::BTreeMap;
use std::collections::HashMap;
use std::io::Write;
use deno_ast::MediaType;
use deno_core::anyhow::bail;
use deno_core::anyhow::Context;
use deno_core::error::AnyError;
use deno_core::serde_json;
use deno_core::url::Url;
use deno_core::FastString;
use deno_core::ModuleSourceCode;
use deno_core::ModuleType;
use deno_npm::resolution::SerializedNpmResolutionSnapshot;
use deno_npm::resolution::SerializedNpmResolutionSnapshotPackage;
use deno_npm::resolution::ValidSerializedNpmResolutionSnapshot;
use deno_npm::NpmPackageId;
use deno_semver::package::PackageReq;
use crate::standalone::virtual_fs::VirtualDirectory;
use super::binary::Metadata;
use super::virtual_fs::VfsBuilder;
const MAGIC_BYTES: &[u8; 8] = b"d3n0l4nd";
/// Binary format:
/// * d3n0l4nd
/// * <metadata_len><metadata>
/// * <npm_snapshot_len><npm_snapshot>
/// * <remote_modules_len><remote_modules>
/// * <vfs_headers_len><vfs_headers>
/// * <vfs_file_data_len><vfs_file_data>
/// * d3n0l4nd
pub fn serialize_binary_data_section(
metadata: &Metadata,
npm_snapshot: Option<SerializedNpmResolutionSnapshot>,
remote_modules: &RemoteModulesStoreBuilder,
vfs: VfsBuilder,
) -> Result<Vec<u8>, AnyError> {
fn write_bytes_with_len(bytes: &mut Vec<u8>, data: &[u8]) {
bytes.extend_from_slice(&(data.len() as u64).to_le_bytes());
bytes.extend_from_slice(data);
}
let mut bytes = Vec::new();
bytes.extend_from_slice(MAGIC_BYTES);
// 1. Metadata
{
let metadata = serde_json::to_string(metadata)?;
write_bytes_with_len(&mut bytes, metadata.as_bytes());
}
// 2. Npm snapshot
{
let npm_snapshot =
npm_snapshot.map(serialize_npm_snapshot).unwrap_or_default();
write_bytes_with_len(&mut bytes, &npm_snapshot);
}
// 3. Remote modules
{
let update_index = bytes.len();
bytes.extend_from_slice(&(0_u64).to_le_bytes());
let start_index = bytes.len();
remote_modules.write(&mut bytes)?;
let length = bytes.len() - start_index;
let length_bytes = (length as u64).to_le_bytes();
bytes[update_index..update_index + length_bytes.len()]
.copy_from_slice(&length_bytes);
}
// 4. VFS
{
let (vfs, vfs_files) = vfs.into_dir_and_files();
let vfs = serde_json::to_string(&vfs)?;
write_bytes_with_len(&mut bytes, vfs.as_bytes());
let vfs_bytes_len = vfs_files.iter().map(|f| f.len() as u64).sum::<u64>();
bytes.extend_from_slice(&vfs_bytes_len.to_le_bytes());
for file in &vfs_files {
bytes.extend_from_slice(file);
}
}
// write the magic bytes at the end so we can use it
// to make sure we've deserialized correctly
bytes.extend_from_slice(MAGIC_BYTES);
Ok(bytes)
}
pub struct DeserializedDataSection {
pub metadata: Metadata,
pub npm_snapshot: Option<ValidSerializedNpmResolutionSnapshot>,
pub remote_modules: RemoteModulesStore,
pub vfs_dir: VirtualDirectory,
pub vfs_files_data: &'static [u8],
}
pub fn deserialize_binary_data_section(
data: &'static [u8],
) -> Result<Option<DeserializedDataSection>, AnyError> {
fn read_bytes_with_len(input: &[u8]) -> Result<(&[u8], &[u8]), AnyError> {
let (input, len) = read_u64(input)?;
let (input, data) = read_bytes(input, len as usize)?;
Ok((input, data))
}
fn read_magic_bytes(input: &[u8]) -> Result<(&[u8], bool), AnyError> {
if input.len() < MAGIC_BYTES.len() {
bail!("Unexpected end of data. Could not find magic bytes.");
}
let (magic_bytes, input) = input.split_at(MAGIC_BYTES.len());
if magic_bytes != MAGIC_BYTES {
return Ok((input, false));
}
Ok((input, true))
}
let (input, found) = read_magic_bytes(data)?;
if !found {
return Ok(None);
}
// 1. Metadata
let (input, data) = read_bytes_with_len(input).context("reading metadata")?;
let metadata: Metadata =
serde_json::from_slice(data).context("deserializing metadata")?;
// 2. Npm snapshot
let (input, data) =
read_bytes_with_len(input).context("reading npm snapshot")?;
let npm_snapshot = if data.is_empty() {
None
} else {
Some(deserialize_npm_snapshot(data).context("deserializing npm snapshot")?)
};
// 3. Remote modules
let (input, data) =
read_bytes_with_len(input).context("reading remote modules data")?;
let remote_modules =
RemoteModulesStore::build(data).context("deserializing remote modules")?;
// 4. VFS
let (input, data) = read_bytes_with_len(input).context("vfs")?;
let vfs_dir: VirtualDirectory =
serde_json::from_slice(data).context("deserializing vfs data")?;
let (input, vfs_files_data) =
read_bytes_with_len(input).context("reading vfs files data")?;
// finally ensure we read the magic bytes at the end
let (_input, found) = read_magic_bytes(input)?;
if !found {
bail!("Could not find magic bytes at the end of the data.");
}
Ok(Some(DeserializedDataSection {
metadata,
npm_snapshot,
remote_modules,
vfs_dir,
vfs_files_data,
}))
}
#[derive(Default)]
pub struct RemoteModulesStoreBuilder {
specifiers: Vec<(String, u64)>,
data: Vec<(MediaType, Vec<u8>)>,
data_byte_len: u64,
redirects: Vec<(String, String)>,
redirects_len: u64,
}
impl RemoteModulesStoreBuilder {
pub fn add(&mut self, specifier: &Url, media_type: MediaType, data: Vec<u8>) {
let specifier = specifier.to_string();
self.specifiers.push((specifier, self.data_byte_len));
self.data_byte_len += 1 + 8 + data.len() as u64; // media type (1 byte), data length (8 bytes), data
self.data.push((media_type, data));
}
pub fn add_redirects(&mut self, redirects: &BTreeMap<Url, Url>) {
self.redirects.reserve(redirects.len());
for (from, to) in redirects {
let from = from.to_string();
let to = to.to_string();
self.redirects_len += (4 + from.len() + 4 + to.len()) as u64;
self.redirects.push((from, to));
}
}
fn write(&self, writer: &mut dyn Write) -> Result<(), AnyError> {
writer.write_all(&(self.specifiers.len() as u32).to_le_bytes())?;
writer.write_all(&(self.redirects.len() as u32).to_le_bytes())?;
for (specifier, offset) in &self.specifiers {
writer.write_all(&(specifier.len() as u32).to_le_bytes())?;
writer.write_all(specifier.as_bytes())?;
writer.write_all(&offset.to_le_bytes())?;
}
for (from, to) in &self.redirects {
writer.write_all(&(from.len() as u32).to_le_bytes())?;
writer.write_all(from.as_bytes())?;
writer.write_all(&(to.len() as u32).to_le_bytes())?;
writer.write_all(to.as_bytes())?;
}
for (media_type, data) in &self.data {
writer.write_all(&[serialize_media_type(*media_type)])?;
writer.write_all(&(data.len() as u64).to_le_bytes())?;
writer.write_all(data)?;
}
Ok(())
}
}
pub struct DenoCompileModuleData<'a> {
pub specifier: &'a Url,
pub media_type: MediaType,
pub data: Cow<'static, [u8]>,
}
impl<'a> DenoCompileModuleData<'a> {
pub fn into_for_v8(self) -> (&'a Url, ModuleType, ModuleSourceCode) {
fn into_bytes(data: Cow<'static, [u8]>) -> ModuleSourceCode {
ModuleSourceCode::Bytes(match data {
Cow::Borrowed(d) => d.into(),
Cow::Owned(d) => d.into_boxed_slice().into(),
})
}
fn into_string_unsafe(data: Cow<'static, [u8]>) -> ModuleSourceCode {
// todo(https://github.com/denoland/deno_core/pull/943): store whether
// the string is ascii or not ahead of time so we can avoid the is_ascii()
// check in FastString::from_static
match data {
Cow::Borrowed(d) => ModuleSourceCode::String(
// SAFETY: we know this is a valid utf8 string
unsafe { FastString::from_static(std::str::from_utf8_unchecked(d)) },
),
Cow::Owned(d) => ModuleSourceCode::Bytes(d.into_boxed_slice().into()),
}
}
let (media_type, source) = match self.media_type {
MediaType::JavaScript
| MediaType::Jsx
| MediaType::Mjs
| MediaType::Cjs
| MediaType::TypeScript
| MediaType::Mts
| MediaType::Cts
| MediaType::Dts
| MediaType::Dmts
| MediaType::Dcts
| MediaType::Tsx => {
(ModuleType::JavaScript, into_string_unsafe(self.data))
}
MediaType::Json => (ModuleType::Json, into_string_unsafe(self.data)),
MediaType::Wasm => (ModuleType::Wasm, into_bytes(self.data)),
// just assume javascript if we made it here
MediaType::TsBuildInfo | MediaType::SourceMap | MediaType::Unknown => {
(ModuleType::JavaScript, into_bytes(self.data))
}
};
(self.specifier, media_type, source)
}
}
enum RemoteModulesStoreSpecifierValue {
Data(usize),
Redirect(Url),
}
pub struct RemoteModulesStore {
specifiers: HashMap<Url, RemoteModulesStoreSpecifierValue>,
files_data: &'static [u8],
}
impl RemoteModulesStore {
fn build(data: &'static [u8]) -> Result<Self, AnyError> {
fn read_specifier(input: &[u8]) -> Result<(&[u8], (Url, u64)), AnyError> {
let (input, specifier) = read_string_lossy(input)?;
let specifier = Url::parse(&specifier)?;
let (input, offset) = read_u64(input)?;
Ok((input, (specifier, offset)))
}
fn read_redirect(input: &[u8]) -> Result<(&[u8], (Url, Url)), AnyError> {
let (input, from) = read_string_lossy(input)?;
let from = Url::parse(&from)?;
let (input, to) = read_string_lossy(input)?;
let to = Url::parse(&to)?;
Ok((input, (from, to)))
}
fn read_headers(
input: &[u8],
) -> Result<(&[u8], HashMap<Url, RemoteModulesStoreSpecifierValue>), AnyError>
{
let (input, specifiers_len) = read_u32_as_usize(input)?;
let (mut input, redirects_len) = read_u32_as_usize(input)?;
let mut specifiers =
HashMap::with_capacity(specifiers_len + redirects_len);
for _ in 0..specifiers_len {
let (current_input, (specifier, offset)) =
read_specifier(input).context("reading specifier")?;
input = current_input;
specifiers.insert(
specifier,
RemoteModulesStoreSpecifierValue::Data(offset as usize),
);
}
for _ in 0..redirects_len {
let (current_input, (from, to)) = read_redirect(input)?;
input = current_input;
specifiers.insert(from, RemoteModulesStoreSpecifierValue::Redirect(to));
}
Ok((input, specifiers))
}
let (files_data, specifiers) = read_headers(data)?;
Ok(Self {
specifiers,
files_data,
})
}
pub fn resolve_specifier<'a>(
&'a self,
specifier: &'a Url,
) -> Result<Option<&'a Url>, AnyError> {
let mut count = 0;
let mut current = specifier;
loop {
if count > 10 {
bail!("Too many redirects resolving '{}'", specifier);
}
match self.specifiers.get(current) {
Some(RemoteModulesStoreSpecifierValue::Redirect(to)) => {
current = to;
count += 1;
}
Some(RemoteModulesStoreSpecifierValue::Data(_)) => {
return Ok(Some(current));
}
None => {
return Ok(None);
}
}
}
}
pub fn read<'a>(
&'a self,
specifier: &'a Url,
) -> Result<Option<DenoCompileModuleData<'a>>, AnyError> {
let mut count = 0;
let mut current = specifier;
loop {
if count > 10 {
bail!("Too many redirects resolving '{}'", specifier);
}
match self.specifiers.get(current) {
Some(RemoteModulesStoreSpecifierValue::Redirect(to)) => {
current = to;
count += 1;
}
Some(RemoteModulesStoreSpecifierValue::Data(offset)) => {
let input = &self.files_data[*offset..];
let (input, media_type_byte) = read_bytes(input, 1)?;
let media_type = deserialize_media_type(media_type_byte[0])?;
let (input, len) = read_u64(input)?;
let (_input, data) = read_bytes(input, len as usize)?;
return Ok(Some(DenoCompileModuleData {
specifier,
media_type,
data: Cow::Borrowed(data),
}));
}
None => {
return Ok(None);
}
}
}
}
}
fn serialize_npm_snapshot(
mut snapshot: SerializedNpmResolutionSnapshot,
) -> Vec<u8> {
fn append_string(bytes: &mut Vec<u8>, string: &str) {
let len = string.len() as u32;
bytes.extend_from_slice(&len.to_le_bytes());
bytes.extend_from_slice(string.as_bytes());
}
snapshot.packages.sort_by(|a, b| a.id.cmp(&b.id)); // determinism
let ids_to_stored_ids = snapshot
.packages
.iter()
.enumerate()
.map(|(i, pkg)| (&pkg.id, i as u32))
.collect::<HashMap<_, _>>();
let mut root_packages: Vec<_> = snapshot.root_packages.iter().collect();
root_packages.sort();
let mut bytes = Vec::new();
bytes.extend_from_slice(&(snapshot.packages.len() as u32).to_le_bytes());
for pkg in &snapshot.packages {
append_string(&mut bytes, &pkg.id.as_serialized());
}
bytes.extend_from_slice(&(root_packages.len() as u32).to_le_bytes());
for (req, id) in root_packages {
append_string(&mut bytes, &req.to_string());
let id = ids_to_stored_ids.get(&id).unwrap();
bytes.extend_from_slice(&id.to_le_bytes());
}
for pkg in &snapshot.packages {
let deps_len = pkg.dependencies.len() as u32;
bytes.extend_from_slice(&deps_len.to_le_bytes());
let mut deps: Vec<_> = pkg.dependencies.iter().collect();
deps.sort();
for (req, id) in deps {
append_string(&mut bytes, req);
let id = ids_to_stored_ids.get(&id).unwrap();
bytes.extend_from_slice(&id.to_le_bytes());
}
}
bytes
}
fn deserialize_npm_snapshot(
input: &[u8],
) -> Result<ValidSerializedNpmResolutionSnapshot, AnyError> {
fn parse_id(input: &[u8]) -> Result<(&[u8], NpmPackageId), AnyError> {
let (input, id) = read_string_lossy(input)?;
let id = NpmPackageId::from_serialized(&id)?;
Ok((input, id))
}
#[allow(clippy::needless_lifetimes)] // clippy bug
fn parse_root_package<'a>(
id_to_npm_id: &'a impl Fn(usize) -> Result<NpmPackageId, AnyError>,
) -> impl Fn(&[u8]) -> Result<(&[u8], (PackageReq, NpmPackageId)), AnyError> + 'a
{
|input| {
let (input, req) = read_string_lossy(input)?;
let req = PackageReq::from_str(&req)?;
let (input, id) = read_u32_as_usize(input)?;
Ok((input, (req, id_to_npm_id(id)?)))
}
}
#[allow(clippy::needless_lifetimes)] // clippy bug
fn parse_package_dep<'a>(
id_to_npm_id: &'a impl Fn(usize) -> Result<NpmPackageId, AnyError>,
) -> impl Fn(&[u8]) -> Result<(&[u8], (String, NpmPackageId)), AnyError> + 'a
{
|input| {
let (input, req) = read_string_lossy(input)?;
let (input, id) = read_u32_as_usize(input)?;
Ok((input, (req.into_owned(), id_to_npm_id(id)?)))
}
}
fn parse_package<'a>(
input: &'a [u8],
id: NpmPackageId,
id_to_npm_id: &impl Fn(usize) -> Result<NpmPackageId, AnyError>,
) -> Result<(&'a [u8], SerializedNpmResolutionSnapshotPackage), AnyError> {
let (input, deps_len) = read_u32_as_usize(input)?;
let (input, dependencies) =
parse_hashmap_n_times(input, deps_len, parse_package_dep(id_to_npm_id))?;
Ok((
input,
SerializedNpmResolutionSnapshotPackage {
id,
system: Default::default(),
dist: Default::default(),
dependencies,
optional_dependencies: Default::default(),
bin: None,
scripts: Default::default(),
deprecated: Default::default(),
},
))
}
let (input, packages_len) = read_u32_as_usize(input)?;
// get a hashmap of all the npm package ids to their serialized ids
let (input, data_ids_to_npm_ids) =
parse_vec_n_times(input, packages_len, parse_id)
.context("deserializing id")?;
let data_id_to_npm_id = |id: usize| {
data_ids_to_npm_ids
.get(id)
.cloned()
.ok_or_else(|| deno_core::anyhow::anyhow!("Invalid npm package id"))
};
let (input, root_packages_len) = read_u32_as_usize(input)?;
let (input, root_packages) = parse_hashmap_n_times(
input,
root_packages_len,
parse_root_package(&data_id_to_npm_id),
)
.context("deserializing root package")?;
let (input, packages) =
parse_vec_n_times_with_index(input, packages_len, |input, index| {
parse_package(input, data_id_to_npm_id(index)?, &data_id_to_npm_id)
})
.context("deserializing package")?;
if !input.is_empty() {
bail!("Unexpected data left over");
}
Ok(
SerializedNpmResolutionSnapshot {
packages,
root_packages,
}
// this is ok because we have already verified that all the
// identifiers found in the snapshot are valid via the
// npm package id -> npm package id mapping
.into_valid_unsafe(),
)
}
fn serialize_media_type(media_type: MediaType) -> u8 {
match media_type {
MediaType::JavaScript => 0,
MediaType::Jsx => 1,
MediaType::Mjs => 2,
MediaType::Cjs => 3,
MediaType::TypeScript => 4,
MediaType::Mts => 5,
MediaType::Cts => 6,
MediaType::Dts => 7,
MediaType::Dmts => 8,
MediaType::Dcts => 9,
MediaType::Tsx => 10,
MediaType::Json => 11,
MediaType::Wasm => 12,
MediaType::TsBuildInfo => 13,
MediaType::SourceMap => 14,
MediaType::Unknown => 15,
}
}
fn deserialize_media_type(value: u8) -> Result<MediaType, AnyError> {
match value {
0 => Ok(MediaType::JavaScript),
1 => Ok(MediaType::Jsx),
2 => Ok(MediaType::Mjs),
3 => Ok(MediaType::Cjs),
4 => Ok(MediaType::TypeScript),
5 => Ok(MediaType::Mts),
6 => Ok(MediaType::Cts),
7 => Ok(MediaType::Dts),
8 => Ok(MediaType::Dmts),
9 => Ok(MediaType::Dcts),
10 => Ok(MediaType::Tsx),
11 => Ok(MediaType::Json),
12 => Ok(MediaType::Wasm),
13 => Ok(MediaType::TsBuildInfo),
14 => Ok(MediaType::SourceMap),
15 => Ok(MediaType::Unknown),
_ => bail!("Unknown media type value: {}", value),
}
}
fn parse_hashmap_n_times<TKey: std::cmp::Eq + std::hash::Hash, TValue>(
mut input: &[u8],
times: usize,
parse: impl Fn(&[u8]) -> Result<(&[u8], (TKey, TValue)), AnyError>,
) -> Result<(&[u8], HashMap<TKey, TValue>), AnyError> {
let mut results = HashMap::with_capacity(times);
for _ in 0..times {
let result = parse(input);
let (new_input, (key, value)) = result?;
results.insert(key, value);
input = new_input;
}
Ok((input, results))
}
fn parse_vec_n_times<TResult>(
input: &[u8],
times: usize,
parse: impl Fn(&[u8]) -> Result<(&[u8], TResult), AnyError>,
) -> Result<(&[u8], Vec<TResult>), AnyError> {
parse_vec_n_times_with_index(input, times, |input, _index| parse(input))
}
fn parse_vec_n_times_with_index<TResult>(
mut input: &[u8],
times: usize,
parse: impl Fn(&[u8], usize) -> Result<(&[u8], TResult), AnyError>,
) -> Result<(&[u8], Vec<TResult>), AnyError> {
let mut results = Vec::with_capacity(times);
for i in 0..times {
let result = parse(input, i);
let (new_input, result) = result?;
results.push(result);
input = new_input;
}
Ok((input, results))
}
fn read_bytes(input: &[u8], len: usize) -> Result<(&[u8], &[u8]), AnyError> {
if input.len() < len {
bail!("Unexpected end of data.",);
}
let (len_bytes, input) = input.split_at(len);
Ok((input, len_bytes))
}
fn read_string_lossy(input: &[u8]) -> Result<(&[u8], Cow<str>), AnyError> {
let (input, str_len) = read_u32_as_usize(input)?;
let (input, data_bytes) = read_bytes(input, str_len)?;
Ok((input, String::from_utf8_lossy(data_bytes)))
}
fn read_u32_as_usize(input: &[u8]) -> Result<(&[u8], usize), AnyError> {
let (input, len_bytes) = read_bytes(input, 4)?;
let len = u32::from_le_bytes(len_bytes.try_into()?);
Ok((input, len as usize))
}
fn read_u64(input: &[u8]) -> Result<(&[u8], u64), AnyError> {
let (input, len_bytes) = read_bytes(input, 8)?;
let len = u64::from_le_bytes(len_bytes.try_into()?);
Ok((input, len))
}

115
cli/standalone/virtual_fs.rs
View file

@ -7,6 +7,7 @@ use std::fs::File;
use std::io::Read;
use std::io::Seek;
use std::io::SeekFrom;
use std::ops::Range;
use std::path::Path;
use std::path::PathBuf;
use std::rc::Rc;
@ -67,6 +68,26 @@ impl VfsBuilder {
})
}
pub fn set_new_root_path(
&mut self,
root_path: PathBuf,
) -> Result<(), AnyError> {
let root_path = canonicalize_path(&root_path)?;
self.root_path = root_path;
self.root_dir = VirtualDirectory {
name: self
.root_path
.file_stem()
.map(|s| s.to_string_lossy().into_owned())
.unwrap_or("root".to_string()),
entries: vec![VfsEntry::Dir(VirtualDirectory {
name: std::mem::take(&mut self.root_dir.name),
entries: std::mem::take(&mut self.root_dir.entries),
})],
};
Ok(())
}
pub fn with_root_dir<R>(
&mut self,
with_root: impl FnOnce(&mut VirtualDirectory) -> R,
@ -119,7 +140,7 @@ impl VfsBuilder {
// inline the symlink and make the target file
let file_bytes = std::fs::read(&target)
.with_context(|| format!("Reading {}", path.display()))?;
self.add_file(&path, file_bytes)?;
self.add_file_with_data_inner(&path, file_bytes)?;
} else {
log::warn!(
"{} Symlink target is outside '{}'. Excluding symlink at '{}' with target '{}'.",
@ -191,16 +212,32 @@ impl VfsBuilder {
self.add_file_at_path_not_symlink(&target_path)
}
pub fn add_file_at_path_not_symlink(
fn add_file_at_path_not_symlink(
&mut self,
path: &Path,
) -> Result<(), AnyError> {
let file_bytes = std::fs::read(path)
.with_context(|| format!("Reading {}", path.display()))?;
self.add_file(path, file_bytes)
self.add_file_with_data_inner(path, file_bytes)
}
fn add_file(&mut self, path: &Path, data: Vec<u8>) -> Result<(), AnyError> {
pub fn add_file_with_data(
&mut self,
path: &Path,
data: Vec<u8>,
) -> Result<(), AnyError> {
let target_path = canonicalize_path(path)?;
if target_path != path {
self.add_symlink(path, &target_path)?;
}
self.add_file_with_data_inner(&target_path, data)
}
fn add_file_with_data_inner(
&mut self,
path: &Path,
data: Vec<u8>,
) -> Result<(), AnyError> {
log::debug!("Adding file '{}'", path.display());
let checksum = util::checksum::gen(&[&data]);
let offset = if let Some(offset) = self.file_offsets.get(&checksum) {
@ -249,8 +286,15 @@ impl VfsBuilder {
path.display(),
target.display()
);
let dest = self.path_relative_root(target)?;
if dest == self.path_relative_root(path)? {
let relative_target = self.path_relative_root(target)?;
let relative_path = match self.path_relative_root(path) {
Ok(path) => path,
Err(StripRootError { .. }) => {
// ignore if the original path is outside the root directory
return Ok(());
}
};
if relative_target == relative_path {
// it's the same, ignore
return Ok(());
}
@ -263,7 +307,7 @@ impl VfsBuilder {
insert_index,
VfsEntry::Symlink(VirtualSymlink {
name: name.to_string(),
dest_parts: dest
dest_parts: relative_target
.components()
.map(|c| c.as_os_str().to_string_lossy().to_string())
.collect::<Vec<_>>(),
@ -751,14 +795,14 @@ impl deno_io::fs::File for FileBackedVfsFile {
#[derive(Debug)]
pub struct FileBackedVfs {
file: Mutex<Vec<u8>>,
vfs_data: Cow<'static, [u8]>,
fs_root: VfsRoot,
}
impl FileBackedVfs {
pub fn new(file: Vec<u8>, fs_root: VfsRoot) -> Self {
pub fn new(data: Cow<'static, [u8]>, fs_root: VfsRoot) -> Self {
Self {
file: Mutex::new(file),
vfs_data: data,
fs_root,
}
}
@ -827,10 +871,15 @@ impl FileBackedVfs {
Ok(path)
}
pub fn read_file_all(&self, file: &VirtualFile) -> std::io::Result<Vec<u8>> {
let mut buf = vec![0; file.len as usize];
self.read_file(file, 0, &mut buf)?;
Ok(buf)
pub fn read_file_all(
&self,
file: &VirtualFile,
) -> std::io::Result<Cow<'static, [u8]>> {
let read_range = self.get_read_range(file, 0, file.len)?;
match &self.vfs_data {
Cow::Borrowed(data) => Ok(Cow::Borrowed(&data[read_range])),
Cow::Owned(data) => Ok(Cow::Owned(data[read_range].to_vec())),
}
}
pub fn read_file(
@ -839,18 +888,27 @@ impl FileBackedVfs {
pos: u64,
buf: &mut [u8],
) -> std::io::Result<usize> {
let data = self.file.lock();
let read_range = self.get_read_range(file, pos, buf.len() as u64)?;
buf.copy_from_slice(&self.vfs_data[read_range]);
Ok(buf.len())
}
fn get_read_range(
&self,
file: &VirtualFile,
pos: u64,
len: u64,
) -> std::io::Result<Range<usize>> {
let data = &self.vfs_data;
let start = self.fs_root.start_file_offset + file.offset + pos;
let end = start + buf.len() as u64;
let end = start + len;
if end > data.len() as u64 {
return Err(std::io::Error::new(
std::io::ErrorKind::UnexpectedEof,
"unexpected EOF",
));
}
buf.copy_from_slice(&data[start as usize..end as usize]);
Ok(buf.len())
Ok(start as usize..end as usize)
}
pub fn dir_entry(&self, path: &Path) -> std::io::Result<&VirtualDirectory> {
@ -888,7 +946,7 @@ mod test {
#[track_caller]
fn read_file(vfs: &FileBackedVfs, path: &Path) -> String {
let file = vfs.file_entry(path).unwrap();
String::from_utf8(vfs.read_file_all(file).unwrap()).unwrap()
String::from_utf8(vfs.read_file_all(file).unwrap().into_owned()).unwrap()
}
#[test]
@ -901,20 +959,23 @@ mod test {
let src_path = src_path.to_path_buf();
let mut builder = VfsBuilder::new(src_path.clone()).unwrap();
builder
.add_file(&src_path.join("a.txt"), "data".into())
.add_file_with_data_inner(&src_path.join("a.txt"), "data".into())
.unwrap();
builder
.add_file(&src_path.join("b.txt"), "data".into())
.add_file_with_data_inner(&src_path.join("b.txt"), "data".into())
.unwrap();
assert_eq!(builder.files.len(), 1); // because duplicate data
builder
.add_file(&src_path.join("c.txt"), "c".into())
.add_file_with_data_inner(&src_path.join("c.txt"), "c".into())
.unwrap();
builder
.add_file(&src_path.join("sub_dir").join("d.txt"), "d".into())
.add_file_with_data_inner(
&src_path.join("sub_dir").join("d.txt"),
"d".into(),
)
.unwrap();
builder
.add_file(&src_path.join("e.txt"), "e".into())
.add_file_with_data_inner(&src_path.join("e.txt"), "e".into())
.unwrap();
builder
.add_symlink(
@ -1031,7 +1092,7 @@ mod test {
(
dest_path.to_path_buf(),
FileBackedVfs::new(
data,
Cow::Owned(data),
VfsRoot {
dir: root_dir,
root_path: dest_path.to_path_buf(),
@ -1082,7 +1143,7 @@ mod test {
let temp_path = temp_dir.path().canonicalize();
let mut builder = VfsBuilder::new(temp_path.to_path_buf()).unwrap();
builder
.add_file(
.add_file_with_data_inner(
temp_path.join("a.txt").as_path(),
"0123456789".to_string().into_bytes(),
)

30
cli/tools/compile.rs
View file

@ -5,6 +5,7 @@ use crate::args::CompileFlags;
use crate::args::Flags;
use crate::factory::CliFactory;
use crate::http_util::HttpClientProvider;
use crate::standalone::binary::StandaloneRelativeFileBaseUrl;
use crate::standalone::is_standalone_binary;
use deno_ast::ModuleSpecifier;
use deno_core::anyhow::bail;
@ -14,7 +15,6 @@ use deno_core::error::AnyError;
use deno_core::resolve_url_or_path;
use deno_graph::GraphKind;
use deno_terminal::colors;
use eszip::EszipRelativeFileBaseUrl;
use rand::Rng;
use std::path::Path;
use std::path::PathBuf;
@ -29,7 +29,6 @@ pub async fn compile(
let factory = CliFactory::from_flags(flags);
let cli_options = factory.cli_options()?;
let module_graph_creator = factory.module_graph_creator().await?;
let parsed_source_cache = factory.parsed_source_cache();
let binary_writer = factory.create_compile_binary_writer().await?;
let http_client = factory.http_client_provider();
let module_specifier = cli_options.resolve_main_module()?;
@ -80,7 +79,7 @@ pub async fn compile(
let graph = if cli_options.type_check_mode().is_true() {
// In this case, the previous graph creation did type checking, which will
// create a module graph with types information in it. We don't want to
// store that in the eszip so create a code only module graph from scratch.
// store that in the binary so create a code only module graph from scratch.
module_graph_creator
.create_graph(GraphKind::CodeOnly, module_roots)
.await?
@ -91,11 +90,6 @@ pub async fn compile(
let ts_config_for_emit = cli_options
.resolve_ts_config_for_emit(deno_config::deno_json::TsConfigType::Emit)?;
check_warn_tsconfig(&ts_config_for_emit);
let (transpile_options, emit_options) =
crate::args::ts_config_to_transpile_and_emit_options(
ts_config_for_emit.ts_config,
)?;
let parser = parsed_source_cache.as_capturing_parser();
let root_dir_url = resolve_root_dir_from_specifiers(
cli_options.workspace().root_dir(),
graph.specifiers().map(|(s, _)| s).chain(
@ -106,17 +100,6 @@ pub async fn compile(
),
);
log::debug!("Binary root dir: {}", root_dir_url);
let root_dir_url = EszipRelativeFileBaseUrl::new(&root_dir_url);
let eszip = eszip::EszipV2::from_graph(eszip::FromGraphOptions {
graph,
parser,
transpile_options,
emit_options,
// make all the modules relative to the root folder
relative_file_base: Some(root_dir_url),
npm_packages: None,
})?;
log::info!(
"{} {} to {}",
colors::green("Compile"),
@ -143,15 +126,18 @@ pub async fn compile(
let write_result = binary_writer
.write_bin(
file,
eszip,
root_dir_url,
&graph,
StandaloneRelativeFileBaseUrl::from(&root_dir_url),
module_specifier,
&compile_flags,
cli_options,
)
.await
.with_context(|| {
format!("Writing temporary file '{}'", temp_path.display())
format!(
"Writing deno compile executable to temporary file '{}'",
temp_path.display()
)
});
// set it as executable

15
cli/util/text_encoding.rs
View file

@ -103,6 +103,21 @@ pub fn arc_str_to_bytes(arc_str: Arc<str>) -> Arc<[u8]> {
unsafe { Arc::from_raw(raw as *const [u8]) }
}
/// Converts an `Arc<u8>` to an `Arc<str>` if able.
#[allow(dead_code)]
pub fn arc_u8_to_arc_str(
arc_u8: Arc<[u8]>,
) -> Result<Arc<str>, std::str::Utf8Error> {
// Check that the string is valid UTF-8.
std::str::from_utf8(&arc_u8)?;
// SAFETY: the string is valid UTF-8, and the layout Arc<[u8]> is the same as
// Arc<str>. This is proven by the From<Arc<str>> impl for Arc<[u8]> from the
// standard library.
Ok(unsafe {
std::mem::transmute::<std::sync::Arc<[u8]>, std::sync::Arc<str>>(arc_u8)
})
}
#[cfg(test)]
mod tests {
use std::sync::Arc;

2
tests/specs/compile/byonm_main_sub_dir/deno.json
View file

@ -1,3 +1,3 @@
{
"unstable": ["byonm"]
"nodeModulesDir": "manual"
}

3
tests/specs/compile/detect_cjs/output.out
View file

@ -1 +1,2 @@
error: Module not found: file:///[WILDLINE]/add.js
error: Uncaught SyntaxError: The requested module './add.js' does not provide an export named 'add'
at <anonymous> (file:///[WILDLINE])