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https://github.com/denoland/deno.git
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a6ca4d0d61
This changes npm specifiers to be handled by deno_graph and resolved to an npm package name and version when the specifier is encountered. It also slightly changes how npm specifier resolution occurs—previously it would collect all the npm specifiers and resolve them all at once, but now it resolves them on the fly as they are encountered in the module graph. https://github.com/denoland/deno_graph/pull/232 --------- Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
104 lines
3 KiB
Rust
104 lines
3 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use crate::cache::CachedUrlMetadata;
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use crate::cache::HttpCache;
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use deno_core::parking_lot::Mutex;
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use deno_core::ModuleSpecifier;
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use std::collections::HashMap;
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use std::fs;
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use std::path::Path;
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use std::sync::Arc;
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use std::time::SystemTime;
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/// Calculate a version for for a given path.
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pub fn calculate_fs_version(path: &Path) -> Option<String> {
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let metadata = fs::metadata(path).ok()?;
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if let Ok(modified) = metadata.modified() {
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if let Ok(n) = modified.duration_since(SystemTime::UNIX_EPOCH) {
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Some(n.as_millis().to_string())
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} else {
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Some("1".to_string())
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}
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} else {
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Some("1".to_string())
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}
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}
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/// Populate the metadata map based on the supplied headers
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fn parse_metadata(
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headers: &HashMap<String, String>,
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) -> HashMap<MetadataKey, String> {
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let mut metadata = HashMap::new();
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if let Some(warning) = headers.get("x-deno-warning").cloned() {
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metadata.insert(MetadataKey::Warning, warning);
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}
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metadata
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}
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#[derive(Debug, PartialEq, Eq, Hash)]
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pub enum MetadataKey {
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/// Represent the `x-deno-warning` header associated with the document
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Warning,
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}
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#[derive(Debug, Clone)]
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struct Metadata {
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values: Arc<HashMap<MetadataKey, String>>,
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version: Option<String>,
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}
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#[derive(Debug, Default, Clone)]
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pub struct CacheMetadata {
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cache: HttpCache,
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metadata: Arc<Mutex<HashMap<ModuleSpecifier, Metadata>>>,
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}
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impl CacheMetadata {
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pub fn new(cache: HttpCache) -> Self {
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Self {
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cache,
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metadata: Default::default(),
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}
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}
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/// Return the meta data associated with the specifier. Unlike the `get()`
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/// method, redirects of the supplied specifier will not be followed.
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pub fn get(
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&self,
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specifier: &ModuleSpecifier,
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) -> Option<Arc<HashMap<MetadataKey, String>>> {
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if matches!(specifier.scheme(), "file" | "npm" | "node") {
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return None;
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}
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let version = self
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.cache
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.get_cache_filename(specifier)
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.and_then(|ref path| calculate_fs_version(path));
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let metadata = self.metadata.lock().get(specifier).cloned();
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if metadata.as_ref().and_then(|m| m.version.clone()) != version {
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self.refresh(specifier).map(|m| m.values)
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} else {
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metadata.map(|m| m.values)
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}
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}
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fn refresh(&self, specifier: &ModuleSpecifier) -> Option<Metadata> {
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if matches!(specifier.scheme(), "file" | "npm" | "node") {
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return None;
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}
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let cache_filename = self.cache.get_cache_filename(specifier)?;
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let specifier_metadata = CachedUrlMetadata::read(&cache_filename).ok()?;
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let values = Arc::new(parse_metadata(&specifier_metadata.headers));
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let version = calculate_fs_version(&cache_filename);
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let mut metadata_map = self.metadata.lock();
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let metadata = Metadata { values, version };
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metadata_map.insert(specifier.clone(), metadata.clone());
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Some(metadata)
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}
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pub fn set_location(&mut self, location: &Path) {
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self.cache = HttpCache::new(location);
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self.metadata.lock().clear();
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}
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}
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