mirror of
https://github.com/denoland/deno.git
synced 2024-11-25 15:29:32 -05:00
762 lines
25 KiB
Rust
762 lines
25 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use crate::cache;
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use crate::cache::Cacher;
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use crate::colors;
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use crate::compat;
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use crate::compat::NodeEsmResolver;
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use crate::config_file::ConfigFile;
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use crate::config_file::MaybeImportsResult;
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use crate::deno_dir;
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use crate::emit;
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use crate::errors::get_error_class_name;
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use crate::file_fetcher::CacheSetting;
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use crate::file_fetcher::FileFetcher;
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use crate::flags;
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use crate::http_cache;
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use crate::lockfile::as_maybe_locker;
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use crate::lockfile::Lockfile;
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use crate::resolver::ImportMapResolver;
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use crate::resolver::JsxResolver;
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use crate::source_maps::SourceMapGetter;
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use crate::version;
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use deno_core::anyhow::anyhow;
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use deno_core::anyhow::Context;
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use deno_core::error::custom_error;
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use deno_core::error::AnyError;
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use deno_core::parking_lot::Mutex;
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use deno_core::resolve_url;
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use deno_core::url::Url;
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use deno_core::CompiledWasmModuleStore;
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use deno_core::ModuleSource;
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use deno_core::ModuleSpecifier;
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use deno_core::SharedArrayBufferStore;
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use deno_graph::create_graph;
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use deno_graph::Dependency;
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use deno_graph::MediaType;
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use deno_graph::ModuleGraphError;
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use deno_graph::Range;
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use deno_runtime::deno_broadcast_channel::InMemoryBroadcastChannel;
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use deno_runtime::deno_web::BlobStore;
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use deno_runtime::inspector_server::InspectorServer;
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use deno_runtime::permissions::Permissions;
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use deno_tls::rustls::RootCertStore;
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use deno_tls::rustls_native_certs::load_native_certs;
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use deno_tls::webpki_roots::TLS_SERVER_ROOTS;
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use import_map::ImportMap;
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use std::collections::BTreeMap;
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use std::collections::HashMap;
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use std::collections::HashSet;
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use std::collections::VecDeque;
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use std::env;
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use std::fs::File;
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use std::io::BufReader;
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use std::ops::Deref;
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use std::sync::Arc;
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/// This structure represents state of single "deno" program.
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///
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/// It is shared by all created workers (thus V8 isolates).
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#[derive(Clone)]
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pub struct ProcState(Arc<Inner>);
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#[derive(Default)]
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struct GraphData {
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modules: HashMap<ModuleSpecifier, Result<ModuleSource, ModuleGraphError>>,
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dependency_map: HashMap<ModuleSpecifier, BTreeMap<String, Dependency>>,
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/// A set of type libs that each module has passed a type check with this
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/// session. This would consist of window, worker or both.
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checked_libs_map: HashMap<ModuleSpecifier, HashSet<emit::TypeLib>>,
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/// Map of first known referrer locations for each module. Used to enhance
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/// error messages.
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referrer_map: HashMap<ModuleSpecifier, Range>,
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}
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impl GraphData {
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/// Check if `roots` are ready to be loaded by V8. Returns `Some(Ok(()))` if
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/// prepared. Returns `Some(Err(_))` if there is a known module graph error
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/// statically reachable from `roots`. Returns `None` if sufficient graph data
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/// is yet to supplied.
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fn check_if_prepared(
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&self,
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roots: &[ModuleSpecifier],
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) -> Option<Result<(), AnyError>> {
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let mut seen = HashSet::<&ModuleSpecifier>::new();
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let mut visiting = VecDeque::<&ModuleSpecifier>::new();
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for root in roots {
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visiting.push_back(root);
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}
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while let Some(specifier) = visiting.pop_front() {
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match self.modules.get(specifier) {
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Some(Ok(_)) => {
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let deps = self.dependency_map.get(specifier).unwrap();
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for (_, dep) in deps.iter().rev() {
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for resolved in [&dep.maybe_code, &dep.maybe_type] {
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if !dep.is_dynamic {
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match resolved {
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Some(Ok((dep_specifier, _))) => {
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if !dep.is_dynamic && !seen.contains(dep_specifier) {
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seen.insert(dep_specifier);
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visiting.push_front(dep_specifier);
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}
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}
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Some(Err(error)) => {
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let range = error.range();
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if !range.specifier.as_str().contains("$deno") {
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return Some(Err(custom_error(
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get_error_class_name(&error.clone().into()),
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format!("{}\n at {}", error.to_string(), range),
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)));
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}
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return Some(Err(error.clone().into()));
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}
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None => {}
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}
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}
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}
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}
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}
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Some(Err(error)) => {
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if !roots.contains(specifier) {
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if let Some(range) = self.referrer_map.get(specifier) {
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if !range.specifier.as_str().contains("$deno") {
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let message = error.to_string();
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return Some(Err(custom_error(
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get_error_class_name(&error.clone().into()),
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format!("{}\n at {}", message, range),
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)));
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}
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}
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}
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return Some(Err(error.clone().into()));
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}
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None => return None,
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}
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}
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Some(Ok(()))
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}
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}
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pub struct Inner {
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/// Flags parsed from `argv` contents.
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pub flags: flags::Flags,
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pub dir: deno_dir::DenoDir,
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pub coverage_dir: Option<String>,
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pub file_fetcher: FileFetcher,
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graph_data: Arc<Mutex<GraphData>>,
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pub lockfile: Option<Arc<Mutex<Lockfile>>>,
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pub maybe_config_file: Option<ConfigFile>,
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pub maybe_import_map: Option<Arc<ImportMap>>,
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pub maybe_inspector_server: Option<Arc<InspectorServer>>,
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pub root_cert_store: Option<RootCertStore>,
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pub blob_store: BlobStore,
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pub broadcast_channel: InMemoryBroadcastChannel,
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pub shared_array_buffer_store: SharedArrayBufferStore,
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pub compiled_wasm_module_store: CompiledWasmModuleStore,
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}
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impl Deref for ProcState {
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type Target = Arc<Inner>;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl ProcState {
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pub async fn build(flags: flags::Flags) -> Result<Self, AnyError> {
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let maybe_custom_root = flags
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.cache_path
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.clone()
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.or_else(|| env::var("DENO_DIR").map(String::into).ok());
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let dir = deno_dir::DenoDir::new(maybe_custom_root)?;
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let deps_cache_location = dir.root.join("deps");
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let http_cache = http_cache::HttpCache::new(&deps_cache_location);
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let mut root_cert_store = RootCertStore::empty();
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let ca_stores: Vec<String> = flags
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.ca_stores
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.clone()
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.or_else(|| {
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let env_ca_store = env::var("DENO_TLS_CA_STORE").ok()?;
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Some(
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env_ca_store
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.split(',')
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.map(|s| s.trim().to_string())
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.filter(|s| !s.is_empty())
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.collect(),
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)
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})
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.unwrap_or_else(|| vec!["mozilla".to_string()]);
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for store in ca_stores.iter() {
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match store.as_str() {
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"mozilla" => {
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root_cert_store.add_server_trust_anchors(&TLS_SERVER_ROOTS);
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}
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"system" => {
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let roots = load_native_certs()
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.expect("could not load platform certs")
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.roots;
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root_cert_store.roots.extend(roots);
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}
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_ => {
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return Err(anyhow!("Unknown certificate store \"{}\" specified (allowed: \"system,mozilla\")", store));
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}
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}
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}
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let ca_file = flags.ca_file.clone().or_else(|| env::var("DENO_CERT").ok());
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if let Some(ca_file) = ca_file {
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let certfile = File::open(&ca_file)?;
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let mut reader = BufReader::new(certfile);
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// This function does not return specific errors, if it fails give a generic message.
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if let Err(_err) = root_cert_store.add_pem_file(&mut reader) {
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return Err(anyhow!("Unable to add pem file to certificate store"));
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}
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}
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if let Some(insecure_allowlist) =
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flags.unsafely_ignore_certificate_errors.as_ref()
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{
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let domains = if insecure_allowlist.is_empty() {
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"for all hostnames".to_string()
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} else {
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format!("for: {}", insecure_allowlist.join(", "))
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};
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let msg =
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format!("DANGER: TLS certificate validation is disabled {}", domains);
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eprintln!("{}", colors::yellow(msg));
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}
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let cache_usage = if flags.cached_only {
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CacheSetting::Only
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} else if !flags.cache_blocklist.is_empty() {
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CacheSetting::ReloadSome(flags.cache_blocklist.clone())
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} else if flags.reload {
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CacheSetting::ReloadAll
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} else {
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CacheSetting::Use
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};
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let blob_store = BlobStore::default();
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let broadcast_channel = InMemoryBroadcastChannel::default();
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let shared_array_buffer_store = SharedArrayBufferStore::default();
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let compiled_wasm_module_store = CompiledWasmModuleStore::default();
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let file_fetcher = FileFetcher::new(
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http_cache,
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cache_usage,
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!flags.no_remote,
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Some(root_cert_store.clone()),
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blob_store.clone(),
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flags.unsafely_ignore_certificate_errors.clone(),
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)?;
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let lockfile = if let Some(filename) = &flags.lock {
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let lockfile = Lockfile::new(filename.clone(), flags.lock_write)?;
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Some(Arc::new(Mutex::new(lockfile)))
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} else {
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None
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};
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let maybe_config_file =
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if let Some(config_path) = flags.config_path.as_ref() {
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Some(ConfigFile::read(config_path)?)
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} else {
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None
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};
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let maybe_import_map: Option<Arc<ImportMap>> =
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match flags.import_map_path.as_ref() {
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None => None,
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Some(import_map_url) => {
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let import_map_specifier =
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deno_core::resolve_url_or_path(import_map_url).context(format!(
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"Bad URL (\"{}\") for import map.",
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import_map_url
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))?;
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let file = file_fetcher
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.fetch(&import_map_specifier, &mut Permissions::allow_all())
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.await
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.context(format!(
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"Unable to load '{}' import map",
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import_map_specifier
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))?;
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let import_map =
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ImportMap::from_json(import_map_specifier.as_str(), &file.source)?;
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Some(Arc::new(import_map))
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}
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};
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let maybe_inspect_host = flags.inspect.or(flags.inspect_brk);
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let maybe_inspector_server = maybe_inspect_host.map(|host| {
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Arc::new(InspectorServer::new(host, version::get_user_agent()))
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});
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let coverage_dir = flags
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.coverage_dir
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.clone()
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.or_else(|| env::var("DENO_UNSTABLE_COVERAGE_DIR").ok());
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Ok(ProcState(Arc::new(Inner {
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dir,
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coverage_dir,
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flags,
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file_fetcher,
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graph_data: Default::default(),
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lockfile,
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maybe_config_file,
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maybe_import_map,
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maybe_inspector_server,
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root_cert_store: Some(root_cert_store.clone()),
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blob_store,
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broadcast_channel,
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shared_array_buffer_store,
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compiled_wasm_module_store,
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})))
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}
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/// Return any imports that should be brought into the scope of the module
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/// graph.
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fn get_maybe_imports(&self) -> MaybeImportsResult {
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let mut imports = Vec::new();
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if let Some(config_file) = &self.maybe_config_file {
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if let Some(config_imports) = config_file.to_maybe_imports()? {
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imports.extend(config_imports);
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}
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}
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if self.flags.compat {
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imports.extend(compat::get_node_imports());
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}
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if imports.is_empty() {
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Ok(None)
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} else {
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Ok(Some(imports))
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}
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}
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/// This method must be called for a module or a static importer of that
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/// module before attempting to `load()` it from a `JsRuntime`. It will
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/// populate `self.graph_data` in memory with the necessary source code or
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/// report any module graph / type checking errors.
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pub(crate) async fn prepare_module_load(
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&self,
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roots: Vec<ModuleSpecifier>,
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is_dynamic: bool,
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lib: emit::TypeLib,
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root_permissions: Permissions,
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dynamic_permissions: Permissions,
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reload_on_watch: bool,
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) -> Result<(), AnyError> {
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// TODO(bartlomieju): this is very make-shift, is there an existing API
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// that we could include it like with "maybe_imports"?
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let roots = if self.flags.compat {
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let mut r = vec![compat::GLOBAL_URL.clone()];
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r.extend(roots);
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r
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} else {
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roots
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};
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if !reload_on_watch {
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let graph_data = self.graph_data.lock();
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if self.flags.no_check
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|| roots.iter().all(|root| {
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graph_data
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.checked_libs_map
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.get(root)
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.map_or(false, |checked_libs| checked_libs.contains(&lib))
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})
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{
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if let Some(result) = graph_data.check_if_prepared(&roots) {
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return result;
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}
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}
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}
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let mut cache = cache::FetchCacher::new(
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self.dir.gen_cache.clone(),
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self.file_fetcher.clone(),
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root_permissions.clone(),
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dynamic_permissions.clone(),
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);
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let maybe_locker = as_maybe_locker(self.lockfile.clone());
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let maybe_imports = self.get_maybe_imports()?;
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let node_resolver = NodeEsmResolver::new(
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self.maybe_import_map.clone().map(ImportMapResolver::new),
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);
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let maybe_import_map_resolver =
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self.maybe_import_map.clone().map(ImportMapResolver::new);
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let maybe_jsx_resolver = self
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.maybe_config_file
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.as_ref()
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.map(|cf| {
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cf.to_maybe_jsx_import_source_module()
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.map(|im| JsxResolver::new(im, maybe_import_map_resolver.clone()))
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})
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.flatten();
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let maybe_resolver = if self.flags.compat {
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Some(node_resolver.as_resolver())
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} else if maybe_jsx_resolver.is_some() {
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// the JSX resolver offloads to the import map if present, otherwise uses
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// the default Deno explicit import resolution.
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maybe_jsx_resolver.as_ref().map(|jr| jr.as_resolver())
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} else {
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maybe_import_map_resolver
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.as_ref()
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.map(|im| im.as_resolver())
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};
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let graph = create_graph(
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roots.clone(),
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is_dynamic,
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maybe_imports,
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&mut cache,
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maybe_resolver,
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maybe_locker,
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None,
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)
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.await;
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// If there was a locker, validate the integrity of all the modules in the
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// locker.
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emit::lock(&graph);
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// Determine any modules that have already been emitted this session and
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// should be skipped.
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let reload_exclusions: HashSet<ModuleSpecifier> = {
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let graph_data = self.graph_data.lock();
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graph_data.modules.keys().cloned().collect()
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};
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let config_type = if self.flags.no_check {
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emit::ConfigType::Emit
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} else {
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emit::ConfigType::Check {
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tsc_emit: true,
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lib: lib.clone(),
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}
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};
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let (ts_config, maybe_ignored_options) =
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emit::get_ts_config(config_type, self.maybe_config_file.as_ref(), None)?;
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let graph = Arc::new(graph);
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let mut type_check_result = Ok(());
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if emit::valid_emit(
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graph.as_ref(),
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&cache,
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&ts_config,
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self.flags.reload,
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&reload_exclusions,
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) {
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if let Some(root) = graph.roots.get(0) {
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log::debug!("specifier \"{}\" and dependencies have valid emit, skipping checking and emitting", root);
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} else {
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log::debug!("rootless graph, skipping checking and emitting");
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}
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} else {
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if let Some(ignored_options) = maybe_ignored_options {
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log::warn!("{}", ignored_options);
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}
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let emit_result = if self.flags.no_check {
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let options = emit::EmitOptions {
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ts_config,
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reload_exclusions,
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reload: self.flags.reload,
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};
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emit::emit(graph.as_ref(), &mut cache, options)?
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} else {
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// here, we are type checking, so we want to error here if any of the
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// type only dependencies are missing or we have other errors with them
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// where as if we are not type checking, we shouldn't care about these
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// errors, and they don't get returned in `graph.valid()` above.
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graph.valid_types_only()?;
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let maybe_config_specifier = self
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.maybe_config_file
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.as_ref()
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.map(|cf| ModuleSpecifier::from_file_path(&cf.path).unwrap());
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let options = emit::CheckOptions {
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debug: self.flags.log_level == Some(log::Level::Debug),
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emit_with_diagnostics: false,
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maybe_config_specifier,
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ts_config,
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};
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for root in &graph.roots {
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let root_str = root.to_string();
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// `$deno` specifiers are internal specifiers, printing out that
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// they are being checked is confusing to a user, since they don't
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// actually exist, so we will simply indicate that a generated module
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// is being checked instead of the cryptic internal module
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if !root_str.contains("$deno") {
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log::info!("{} {}", colors::green("Check"), root);
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} else {
|
|
log::info!("{} a generated module", colors::green("Check"))
|
|
}
|
|
}
|
|
emit::check_and_maybe_emit(graph.clone(), &mut cache, options)?
|
|
};
|
|
log::debug!("{}", emit_result.stats);
|
|
if !emit_result.diagnostics.is_empty() {
|
|
type_check_result = Err(anyhow!(emit_result.diagnostics));
|
|
}
|
|
}
|
|
|
|
{
|
|
let mut graph_data = self.graph_data.lock();
|
|
let mut specifiers = graph.specifiers();
|
|
// Set specifier results for redirects.
|
|
// TODO(nayeemrmn): This should be done in `ModuleGraph::specifiers()`.
|
|
for (specifier, found) in &graph.redirects {
|
|
let actual = specifiers.get(found).unwrap().clone();
|
|
specifiers.insert(specifier.clone(), actual);
|
|
}
|
|
for (specifier, result) in &specifiers {
|
|
match result {
|
|
Ok((found_specifier, media_type)) => {
|
|
let module = graph.get(found_specifier).unwrap();
|
|
// If there was a type check error, supply dummy code. It shouldn't
|
|
// be used since preparation will fail.
|
|
let code = if type_check_result.is_err() {
|
|
"".to_string()
|
|
// Check to see if there is an emitted file in the cache.
|
|
} else if let Some(code) =
|
|
cache.get(cache::CacheType::Emit, found_specifier)
|
|
{
|
|
code
|
|
// Then if the file is JavaScript (or unknown) and wasn't emitted,
|
|
// we will load the original source code in the module.
|
|
} else if matches!(
|
|
media_type,
|
|
MediaType::JavaScript
|
|
| MediaType::Unknown
|
|
| MediaType::Cjs
|
|
| MediaType::Mjs
|
|
) {
|
|
module.source.as_str().to_string()
|
|
// The emit may also be missing when a `.dts` file is in the
|
|
// graph. There shouldn't be any runtime statements in the source
|
|
// file and if there was, users would be shown a `TS1036`
|
|
// diagnostic. So just return an empty emit.
|
|
} else if media_type == &MediaType::Dts {
|
|
"".to_string()
|
|
} else {
|
|
unreachable!("unexpected missing emit: {}", found_specifier)
|
|
};
|
|
graph_data.modules.insert(
|
|
specifier.clone(),
|
|
Ok(ModuleSource {
|
|
code,
|
|
module_url_found: found_specifier.to_string(),
|
|
module_url_specified: specifier.to_string(),
|
|
}),
|
|
);
|
|
graph_data
|
|
.dependency_map
|
|
.insert(specifier.clone(), module.dependencies.clone());
|
|
for dep in module.dependencies.values() {
|
|
#[allow(clippy::manual_flatten)]
|
|
for resolved in [&dep.maybe_code, &dep.maybe_type] {
|
|
if let Some(Ok((specifier, referrer_range))) = resolved {
|
|
let entry = graph_data.referrer_map.entry(specifier.clone());
|
|
entry.or_insert_with(|| referrer_range.clone());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Err(error) => {
|
|
graph_data
|
|
.modules
|
|
.insert(specifier.clone(), Err(error.clone()));
|
|
}
|
|
}
|
|
}
|
|
|
|
graph_data.check_if_prepared(&roots).unwrap()?;
|
|
type_check_result?;
|
|
|
|
if !self.flags.no_check {
|
|
for specifier in specifiers.keys() {
|
|
let checked_libs = graph_data
|
|
.checked_libs_map
|
|
.entry(specifier.clone())
|
|
.or_default();
|
|
checked_libs.insert(lib.clone());
|
|
}
|
|
}
|
|
}
|
|
|
|
// any updates to the lockfile should be updated now
|
|
if let Some(ref lockfile) = self.lockfile {
|
|
let g = lockfile.lock();
|
|
g.write()?;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
pub(crate) fn resolve(
|
|
&self,
|
|
specifier: &str,
|
|
referrer: &str,
|
|
) -> Result<ModuleSpecifier, AnyError> {
|
|
if let Ok(s) = deno_core::resolve_url_or_path(referrer) {
|
|
let maybe_resolved = {
|
|
let graph_data = self.graph_data.lock();
|
|
graph_data
|
|
.dependency_map
|
|
.get(&s)
|
|
.and_then(|map| map.get(specifier))
|
|
.map(|dep| dep.maybe_code.clone())
|
|
};
|
|
|
|
if let Some(resolved) = maybe_resolved {
|
|
match resolved {
|
|
Some(Ok((specifier, _))) => {
|
|
return Ok(specifier);
|
|
}
|
|
Some(Err(err)) => {
|
|
return Err(custom_error(
|
|
"TypeError",
|
|
format!("{}\n", err.to_string_with_range()),
|
|
))
|
|
}
|
|
_ => (),
|
|
}
|
|
}
|
|
}
|
|
|
|
// FIXME(bartlomieju): hacky way to provide compatibility with repl
|
|
let referrer = if referrer.is_empty() && self.flags.repl {
|
|
deno_core::DUMMY_SPECIFIER
|
|
} else {
|
|
referrer
|
|
};
|
|
if let Some(import_map) = &self.maybe_import_map {
|
|
import_map
|
|
.resolve(specifier, referrer)
|
|
.map_err(|err| err.into())
|
|
} else {
|
|
deno_core::resolve_import(specifier, referrer).map_err(|err| err.into())
|
|
}
|
|
}
|
|
|
|
pub fn load(
|
|
&self,
|
|
specifier: ModuleSpecifier,
|
|
maybe_referrer: Option<ModuleSpecifier>,
|
|
is_dynamic: bool,
|
|
) -> Result<ModuleSource, AnyError> {
|
|
log::debug!(
|
|
"specifier: {} maybe_referrer: {} is_dynamic: {}",
|
|
specifier,
|
|
maybe_referrer
|
|
.as_ref()
|
|
.map(|s| s.to_string())
|
|
.unwrap_or_else(|| "<none>".to_string()),
|
|
is_dynamic
|
|
);
|
|
|
|
let graph_data = self.graph_data.lock();
|
|
match graph_data.modules.get(&specifier) {
|
|
Some(Ok(module_source)) => Ok(module_source.clone()),
|
|
// This is an edge case usually hit when loading source lines for error
|
|
// stacks with synthetic locations. Users shouldn't see this error.
|
|
_ => Err(anyhow!(
|
|
"Loading unprepared module: {}",
|
|
specifier.to_string()
|
|
)),
|
|
}
|
|
}
|
|
|
|
// TODO(@kitsonk) this should be refactored to get it from the module graph
|
|
fn get_emit(&self, url: &Url) -> Option<(Vec<u8>, Option<Vec<u8>>)> {
|
|
let emit_path = self
|
|
.dir
|
|
.gen_cache
|
|
.get_cache_filename_with_extension(url, "js")?;
|
|
let emit_map_path = self
|
|
.dir
|
|
.gen_cache
|
|
.get_cache_filename_with_extension(url, "js.map")?;
|
|
if let Ok(code) = self.dir.gen_cache.get(&emit_path) {
|
|
let maybe_map = if let Ok(map) = self.dir.gen_cache.get(&emit_map_path) {
|
|
Some(map)
|
|
} else {
|
|
None
|
|
};
|
|
Some((code, maybe_map))
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
}
|
|
|
|
// TODO(@kitsonk) this is only temporary, but should be refactored to somewhere
|
|
// else, like a refactored file_fetcher.
|
|
impl SourceMapGetter for ProcState {
|
|
fn get_source_map(&self, file_name: &str) -> Option<Vec<u8>> {
|
|
if let Ok(specifier) = resolve_url(file_name) {
|
|
match specifier.scheme() {
|
|
// we should only be looking for emits for schemes that denote external
|
|
// modules, which the disk_cache supports
|
|
"wasm" | "file" | "http" | "https" | "data" | "blob" => (),
|
|
_ => return None,
|
|
}
|
|
if let Some((code, maybe_map)) = self.get_emit(&specifier) {
|
|
let code = String::from_utf8(code).unwrap();
|
|
source_map_from_code(code).or(maybe_map)
|
|
} else if let Ok(source) = self.load(specifier, None, false) {
|
|
source_map_from_code(source.code)
|
|
} else {
|
|
None
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
fn get_source_line(
|
|
&self,
|
|
file_name: &str,
|
|
line_number: usize,
|
|
) -> Option<String> {
|
|
if let Ok(specifier) = resolve_url(file_name) {
|
|
self.file_fetcher.get_source(&specifier).map(|out| {
|
|
// Do NOT use .lines(): it skips the terminating empty line.
|
|
// (due to internally using .split_terminator() instead of .split())
|
|
let lines: Vec<&str> = out.source.split('\n').collect();
|
|
if line_number >= lines.len() {
|
|
format!(
|
|
"{} Couldn't format source line: Line {} is out of bounds (source may have changed at runtime)",
|
|
crate::colors::yellow("Warning"), line_number + 1,
|
|
)
|
|
} else {
|
|
lines[line_number].to_string()
|
|
}
|
|
})
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
}
|
|
|
|
fn source_map_from_code(code: String) -> Option<Vec<u8>> {
|
|
let lines: Vec<&str> = code.split('\n').collect();
|
|
if let Some(last_line) = lines.last() {
|
|
if last_line
|
|
.starts_with("//# sourceMappingURL=data:application/json;base64,")
|
|
{
|
|
let input = last_line.trim_start_matches(
|
|
"//# sourceMappingURL=data:application/json;base64,",
|
|
);
|
|
let decoded_map = base64::decode(input)
|
|
.expect("Unable to decode source map from emitted file.");
|
|
Some(decoded_map)
|
|
} else {
|
|
None
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
}
|