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denoland-deno/cli/lsp/sources.rs
2021-03-25 11:13:37 +11:00

536 lines
15 KiB
Rust

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use super::analysis;
use super::text::LineIndex;
use crate::file_fetcher::get_source_from_bytes;
use crate::file_fetcher::map_content_type;
use crate::file_fetcher::SUPPORTED_SCHEMES;
use crate::http_cache;
use crate::http_cache::HttpCache;
use crate::import_map::ImportMap;
use crate::media_type::MediaType;
use crate::module_graph::GraphBuilder;
use crate::program_state::ProgramState;
use crate::specifier_handler::FetchHandler;
use crate::text_encoding;
use deno_runtime::permissions::Permissions;
use deno_core::error::AnyError;
use deno_core::serde_json;
use deno_core::ModuleSpecifier;
use std::collections::HashMap;
use std::fs;
use std::path::Path;
use std::path::PathBuf;
use std::sync::Arc;
use std::sync::Mutex;
use std::time::SystemTime;
pub async fn cache(
specifier: &ModuleSpecifier,
maybe_import_map: &Option<ImportMap>,
) -> Result<(), AnyError> {
let program_state = Arc::new(ProgramState::build(Default::default()).await?);
let handler = Arc::new(Mutex::new(FetchHandler::new(
&program_state,
Permissions::allow_all(),
)?));
let mut builder = GraphBuilder::new(handler, maybe_import_map.clone(), None);
builder.add(specifier, false).await
}
fn get_remote_headers(
cache_filename: &Path,
) -> Option<HashMap<String, String>> {
let metadata_path = http_cache::Metadata::filename(cache_filename);
let metadata_str = fs::read_to_string(metadata_path).ok()?;
let metadata: http_cache::Metadata =
serde_json::from_str(&metadata_str).ok()?;
Some(metadata.headers)
}
fn resolve_remote_specifier(
specifier: &ModuleSpecifier,
http_cache: &HttpCache,
redirect_limit: isize,
) -> Option<ModuleSpecifier> {
let cache_filename = http_cache.get_cache_filename(specifier)?;
if redirect_limit >= 0 && cache_filename.is_file() {
let headers = get_remote_headers(&cache_filename)?;
if let Some(location) = headers.get("location") {
let redirect =
deno_core::resolve_import(location, specifier.as_str()).ok()?;
resolve_remote_specifier(&redirect, http_cache, redirect_limit - 1)
} else {
Some(specifier.clone())
}
} else {
None
}
}
fn resolve_specifier(
specifier: &ModuleSpecifier,
redirects: &mut HashMap<ModuleSpecifier, ModuleSpecifier>,
http_cache: &HttpCache,
) -> Option<ModuleSpecifier> {
let scheme = specifier.scheme();
if !SUPPORTED_SCHEMES.contains(&scheme) {
return None;
}
if scheme == "data" {
Some(specifier.clone())
} else if scheme == "file" {
let path = specifier.to_file_path().ok()?;
if path.is_file() {
Some(specifier.clone())
} else {
None
}
} else if let Some(specifier) = redirects.get(specifier) {
Some(specifier.clone())
} else {
let redirect = resolve_remote_specifier(specifier, http_cache, 10)?;
redirects.insert(specifier.clone(), redirect.clone());
Some(redirect)
}
}
#[derive(Debug, Clone, Default)]
struct Metadata {
dependencies: Option<HashMap<String, analysis::Dependency>>,
length_utf16: usize,
line_index: LineIndex,
maybe_types: Option<analysis::ResolvedDependency>,
media_type: MediaType,
source: String,
version: String,
}
impl Metadata {
fn new(
specifier: &ModuleSpecifier,
source: &str,
version: &str,
media_type: &MediaType,
maybe_import_map: &Option<ImportMap>,
) -> Self {
let (dependencies, maybe_types) = if let Ok(parsed_module) =
analysis::parse_module(specifier, source, media_type)
{
let (deps, maybe_types) = analysis::analyze_dependencies(
specifier,
media_type,
&parsed_module,
maybe_import_map,
);
(Some(deps), maybe_types)
} else {
(None, None)
};
let line_index = LineIndex::new(source);
Self {
dependencies,
length_utf16: source.encode_utf16().count(),
line_index,
maybe_types,
media_type: media_type.to_owned(),
source: source.to_string(),
version: version.to_string(),
}
}
}
#[derive(Debug, Clone, Default)]
struct Inner {
http_cache: HttpCache,
maybe_import_map: Option<ImportMap>,
metadata: HashMap<ModuleSpecifier, Metadata>,
redirects: HashMap<ModuleSpecifier, ModuleSpecifier>,
remotes: HashMap<ModuleSpecifier, PathBuf>,
}
#[derive(Debug, Clone, Default)]
pub struct Sources(Arc<Mutex<Inner>>);
impl Sources {
pub fn new(location: &Path) -> Self {
Self(Arc::new(Mutex::new(Inner::new(location))))
}
pub fn contains_key(&self, specifier: &ModuleSpecifier) -> bool {
self.0.lock().unwrap().contains_key(specifier)
}
pub fn get_line_index(
&self,
specifier: &ModuleSpecifier,
) -> Option<LineIndex> {
self.0.lock().unwrap().get_line_index(specifier)
}
pub fn get_maybe_types(
&self,
specifier: &ModuleSpecifier,
) -> Option<analysis::ResolvedDependency> {
self.0.lock().unwrap().get_maybe_types(specifier)
}
pub fn get_media_type(
&self,
specifier: &ModuleSpecifier,
) -> Option<MediaType> {
self.0.lock().unwrap().get_media_type(specifier)
}
pub fn get_script_version(
&self,
specifier: &ModuleSpecifier,
) -> Option<String> {
self.0.lock().unwrap().get_script_version(specifier)
}
pub fn get_source(&self, specifier: &ModuleSpecifier) -> Option<String> {
self.0.lock().unwrap().get_source(specifier)
}
pub fn resolve_import(
&self,
specifier: &str,
referrer: &ModuleSpecifier,
) -> Option<(ModuleSpecifier, MediaType)> {
self.0.lock().unwrap().resolve_import(specifier, referrer)
}
pub fn specifiers(&self) -> Vec<ModuleSpecifier> {
self
.0
.lock()
.unwrap()
.metadata
.iter()
.map(|(s, _)| s.clone())
.collect()
}
}
impl Inner {
fn new(location: &Path) -> Self {
Self {
http_cache: HttpCache::new(location),
..Default::default()
}
}
fn calculate_script_version(
&mut self,
specifier: &ModuleSpecifier,
) -> Option<String> {
let path = self.get_path(specifier)?;
let metadata = fs::metadata(path).ok()?;
if let Ok(modified) = metadata.modified() {
if let Ok(n) = modified.duration_since(SystemTime::UNIX_EPOCH) {
Some(format!("{}", n.as_millis()))
} else {
Some("1".to_string())
}
} else {
Some("1".to_string())
}
}
fn contains_key(&mut self, specifier: &ModuleSpecifier) -> bool {
if let Some(specifier) =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)
{
if self.get_metadata(&specifier).is_some() {
return true;
}
}
false
}
fn get_line_index(
&mut self,
specifier: &ModuleSpecifier,
) -> Option<LineIndex> {
let specifier =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
let metadata = self.get_metadata(&specifier)?;
Some(metadata.line_index)
}
fn get_maybe_types(
&mut self,
specifier: &ModuleSpecifier,
) -> Option<analysis::ResolvedDependency> {
let specifier =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
let metadata = self.get_metadata(&specifier)?;
metadata.maybe_types
}
fn get_media_type(
&mut self,
specifier: &ModuleSpecifier,
) -> Option<MediaType> {
let specifier =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
let metadata = self.get_metadata(&specifier)?;
Some(metadata.media_type)
}
fn get_metadata(&mut self, specifier: &ModuleSpecifier) -> Option<Metadata> {
if let Some(metadata) = self.metadata.get(specifier).cloned() {
if metadata.version == self.calculate_script_version(specifier)? {
return Some(metadata);
}
}
let version = self.calculate_script_version(specifier)?;
let path = self.get_path(specifier)?;
let bytes = fs::read(path).ok()?;
let scheme = specifier.scheme();
let (source, media_type, maybe_types) = if scheme == "file" {
let maybe_charset =
Some(text_encoding::detect_charset(&bytes).to_string());
let source = get_source_from_bytes(bytes, maybe_charset).ok()?;
(source, MediaType::from(specifier), None)
} else {
let cache_filename = self.http_cache.get_cache_filename(specifier)?;
let headers = get_remote_headers(&cache_filename)?;
let maybe_content_type = headers.get("content-type").cloned();
let (media_type, maybe_charset) =
map_content_type(specifier, maybe_content_type);
let source = get_source_from_bytes(bytes, maybe_charset).ok()?;
let maybe_types = headers.get("x-typescript-types").map(|s| {
analysis::resolve_import(s, &specifier, &self.maybe_import_map)
});
(source, media_type, maybe_types)
};
let mut metadata = Metadata::new(
specifier,
&source,
&version,
&media_type,
&self.maybe_import_map,
);
if metadata.maybe_types.is_none() {
metadata.maybe_types = maybe_types;
}
self.metadata.insert(specifier.clone(), metadata.clone());
Some(metadata)
}
fn get_path(&mut self, specifier: &ModuleSpecifier) -> Option<PathBuf> {
if specifier.scheme() == "file" {
specifier.to_file_path().ok()
} else if let Some(path) = self.remotes.get(&specifier) {
Some(path.clone())
} else {
let path = self.http_cache.get_cache_filename(&specifier)?;
if path.is_file() {
self.remotes.insert(specifier.clone(), path.clone());
Some(path)
} else {
None
}
}
}
fn get_script_version(
&mut self,
specifier: &ModuleSpecifier,
) -> Option<String> {
let specifier =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
let metadata = self.get_metadata(&specifier)?;
Some(metadata.version)
}
fn get_source(&mut self, specifier: &ModuleSpecifier) -> Option<String> {
let specifier =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
let metadata = self.get_metadata(&specifier)?;
Some(metadata.source)
}
fn resolution_result(
&mut self,
specifier: &ModuleSpecifier,
) -> Option<(ModuleSpecifier, MediaType)> {
let specifier =
resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
let media_type = if let Some(metadata) = self.metadata.get(&specifier) {
metadata.media_type
} else {
MediaType::from(&specifier)
};
Some((specifier, media_type))
}
fn resolve_import(
&mut self,
specifier: &str,
referrer: &ModuleSpecifier,
) -> Option<(ModuleSpecifier, MediaType)> {
let referrer =
resolve_specifier(referrer, &mut self.redirects, &self.http_cache)?;
let metadata = self.get_metadata(&referrer)?;
let dependencies = &metadata.dependencies?;
let dependency = dependencies.get(specifier)?;
if let Some(type_dependency) = &dependency.maybe_type {
if let analysis::ResolvedDependency::Resolved(resolved_specifier) =
type_dependency
{
self.resolution_result(resolved_specifier)
} else {
None
}
} else {
let code_dependency = &dependency.maybe_code.clone()?;
if let analysis::ResolvedDependency::Resolved(resolved_specifier) =
code_dependency
{
if let Some(type_dependency) = self.get_maybe_types(resolved_specifier)
{
self.set_maybe_type(specifier, &referrer, &type_dependency);
if let analysis::ResolvedDependency::Resolved(type_specifier) =
type_dependency
{
self.resolution_result(&type_specifier)
} else {
self.resolution_result(resolved_specifier)
}
} else {
self.resolution_result(resolved_specifier)
}
} else {
None
}
}
}
fn set_maybe_type(
&mut self,
specifier: &str,
referrer: &ModuleSpecifier,
dependency: &analysis::ResolvedDependency,
) {
if let Some(metadata) = self.metadata.get_mut(referrer) {
if let Some(dependencies) = &mut metadata.dependencies {
if let Some(dep) = dependencies.get_mut(specifier) {
dep.maybe_type = Some(dependency.clone());
}
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use deno_core::resolve_path;
use deno_core::resolve_url;
use std::env;
use tempfile::TempDir;
fn setup() -> (Sources, PathBuf) {
let temp_dir = TempDir::new().expect("could not create temp dir");
let location = temp_dir.path().join("deps");
let sources = Sources::new(&location);
(sources, location)
}
#[test]
fn test_sources_get_script_version() {
let (sources, _) = setup();
let c = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
let tests = c.join("tests");
let specifier =
resolve_path(&tests.join("001_hello.js").to_string_lossy()).unwrap();
let actual = sources.get_script_version(&specifier);
assert!(actual.is_some());
}
#[test]
fn test_sources_get_text() {
let (sources, _) = setup();
let c = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
let tests = c.join("tests");
let specifier =
resolve_path(&tests.join("001_hello.js").to_string_lossy()).unwrap();
let actual = sources.get_source(&specifier);
assert!(actual.is_some());
let actual = actual.unwrap();
assert_eq!(actual, "console.log(\"Hello World\");\n");
}
#[test]
fn test_resolve_dependency_types() {
let (sources, location) = setup();
let cache = HttpCache::new(&location);
let specifier_dep = resolve_url("https://deno.land/x/mod.ts").unwrap();
cache
.set(
&specifier_dep,
Default::default(),
b"export * from \"https://deno.land/x/lib.js\";",
)
.unwrap();
let specifier_code = resolve_url("https://deno.land/x/lib.js").unwrap();
let mut headers_code = HashMap::new();
headers_code
.insert("x-typescript-types".to_string(), "./lib.d.ts".to_string());
cache
.set(&specifier_code, headers_code, b"export const a = 1;")
.unwrap();
let specifier_type = resolve_url("https://deno.land/x/lib.d.ts").unwrap();
cache
.set(
&specifier_type,
Default::default(),
b"export const a: number;",
)
.unwrap();
let actual =
sources.resolve_import("https://deno.land/x/lib.js", &specifier_dep);
assert_eq!(actual, Some((specifier_type, MediaType::Dts)))
}
#[test]
fn test_resolve_dependency_evil_redirect() {
let (sources, location) = setup();
let cache = HttpCache::new(&location);
let evil_specifier = resolve_url("https://deno.land/x/evil.ts").unwrap();
let mut evil_headers = HashMap::new();
evil_headers
.insert("location".to_string(), "file:///etc/passwd".to_string());
cache.set(&evil_specifier, evil_headers, b"").unwrap();
let remote_specifier = resolve_url("https://deno.land/x/mod.ts").unwrap();
cache
.set(
&remote_specifier,
Default::default(),
b"export * from \"./evil.ts\";",
)
.unwrap();
let actual = sources.resolve_import("./evil.ts", &remote_specifier);
assert_eq!(actual, None);
}
#[test]
fn test_sources_resolve_specifier_non_supported_schema() {
let (sources, _) = setup();
let specifier =
resolve_url("foo://a/b/c.ts").expect("could not create specifier");
let sources = sources.0.lock().unwrap();
let mut redirects = sources.redirects.clone();
let http_cache = sources.http_cache.clone();
let actual = resolve_specifier(&specifier, &mut redirects, &http_cache);
assert!(actual.is_none());
}
}