mirror of
https://github.com/denoland/deno.git
synced 2024-12-24 16:19:12 -05:00
278 lines
8.3 KiB
Rust
278 lines
8.3 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use std::collections::HashSet;
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use std::fs;
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use std::path::Path;
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use std::path::PathBuf;
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use std::sync::Arc;
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use deno_ast::ModuleSpecifier;
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use deno_core::anyhow::bail;
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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::url::Url;
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use deno_npm::registry::NpmPackageVersionDistInfo;
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use deno_npm::NpmPackageCacheFolderId;
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use deno_runtime::deno_fs;
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use deno_semver::package::PackageNv;
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use crate::args::CacheSetting;
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use crate::http_util::HttpClient;
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use crate::npm::NpmCacheDir;
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use crate::util::fs::hard_link_dir_recursive;
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use crate::util::progress_bar::ProgressBar;
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use super::tarball::verify_and_extract_tarball;
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/// Stores a single copy of npm packages in a cache.
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#[derive(Debug)]
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pub struct NpmCache {
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cache_dir: NpmCacheDir,
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cache_setting: CacheSetting,
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fs: Arc<dyn deno_fs::FileSystem>,
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http_client: Arc<HttpClient>,
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progress_bar: ProgressBar,
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/// ensures a package is only downloaded once per run
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previously_reloaded_packages: Mutex<HashSet<PackageNv>>,
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}
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impl NpmCache {
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pub fn new(
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cache_dir: NpmCacheDir,
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cache_setting: CacheSetting,
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fs: Arc<dyn deno_fs::FileSystem>,
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http_client: Arc<HttpClient>,
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progress_bar: ProgressBar,
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) -> Self {
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Self {
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cache_dir,
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cache_setting,
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fs,
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http_client,
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progress_bar,
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previously_reloaded_packages: Default::default(),
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}
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}
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pub fn cache_setting(&self) -> &CacheSetting {
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&self.cache_setting
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}
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pub fn root_dir_url(&self) -> &Url {
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self.cache_dir.root_dir_url()
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}
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/// Checks if the cache should be used for the provided name and version.
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/// NOTE: Subsequent calls for the same package will always return `true`
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/// to ensure a package is only downloaded once per run of the CLI. This
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/// prevents downloads from re-occurring when someone has `--reload` and
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/// and imports a dynamic import that imports the same package again for example.
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fn should_use_global_cache_for_package(&self, package: &PackageNv) -> bool {
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self.cache_setting.should_use_for_npm_package(&package.name)
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|| !self
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.previously_reloaded_packages
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.lock()
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.insert(package.clone())
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}
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pub async fn ensure_package(
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&self,
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package: &PackageNv,
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dist: &NpmPackageVersionDistInfo,
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registry_url: &Url,
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) -> Result<(), AnyError> {
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self
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.ensure_package_inner(package, dist, registry_url)
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.await
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.with_context(|| format!("Failed caching npm package '{package}'."))
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}
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async fn ensure_package_inner(
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&self,
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package: &PackageNv,
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dist: &NpmPackageVersionDistInfo,
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registry_url: &Url,
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) -> Result<(), AnyError> {
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let package_folder = self
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.cache_dir
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.package_folder_for_name_and_version(package, registry_url);
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if self.should_use_global_cache_for_package(package)
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&& self.fs.exists_sync(&package_folder)
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// if this file exists, then the package didn't successfully extract
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// the first time, or another process is currently extracting the zip file
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&& !self.fs.exists_sync(&package_folder.join(NPM_PACKAGE_SYNC_LOCK_FILENAME))
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{
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return Ok(());
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} else if self.cache_setting == CacheSetting::Only {
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return Err(custom_error(
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"NotCached",
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format!(
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"An npm specifier not found in cache: \"{}\", --cached-only is specified.",
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&package.name
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)
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)
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);
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}
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if dist.tarball.is_empty() {
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bail!("Tarball URL was empty.");
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}
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let guard = self.progress_bar.update(&dist.tarball);
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let maybe_bytes = self
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.http_client
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.download_with_progress(&dist.tarball, &guard)
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.await?;
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match maybe_bytes {
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Some(bytes) => {
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verify_and_extract_tarball(package, &bytes, dist, &package_folder)
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}
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None => {
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bail!("Could not find npm package tarball at: {}", dist.tarball);
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}
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}
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}
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/// Ensures a copy of the package exists in the global cache.
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///
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/// This assumes that the original package folder being hard linked
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/// from exists before this is called.
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pub fn ensure_copy_package(
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&self,
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folder_id: &NpmPackageCacheFolderId,
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registry_url: &Url,
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) -> Result<(), AnyError> {
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assert_ne!(folder_id.copy_index, 0);
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let package_folder = self
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.cache_dir
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.package_folder_for_id(folder_id, registry_url);
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if package_folder.exists()
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// if this file exists, then the package didn't successfully extract
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// the first time, or another process is currently extracting the zip file
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&& !package_folder.join(NPM_PACKAGE_SYNC_LOCK_FILENAME).exists()
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&& self.cache_setting.should_use_for_npm_package(&folder_id.nv.name)
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{
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return Ok(());
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}
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let original_package_folder = self
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.cache_dir
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.package_folder_for_name_and_version(&folder_id.nv, registry_url);
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with_folder_sync_lock(&folder_id.nv, &package_folder, || {
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hard_link_dir_recursive(&original_package_folder, &package_folder)
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})?;
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Ok(())
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}
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pub fn package_folder_for_id(
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&self,
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id: &NpmPackageCacheFolderId,
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registry_url: &Url,
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) -> PathBuf {
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self.cache_dir.package_folder_for_id(id, registry_url)
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}
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pub fn package_folder_for_name_and_version(
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&self,
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package: &PackageNv,
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registry_url: &Url,
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) -> PathBuf {
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self
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.cache_dir
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.package_folder_for_name_and_version(package, registry_url)
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}
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pub fn package_name_folder(&self, name: &str, registry_url: &Url) -> PathBuf {
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self.cache_dir.package_name_folder(name, registry_url)
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}
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pub fn registry_folder(&self, registry_url: &Url) -> PathBuf {
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self.cache_dir.registry_folder(registry_url)
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}
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pub fn resolve_package_folder_id_from_specifier(
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&self,
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specifier: &ModuleSpecifier,
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registry_url: &Url,
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) -> Option<NpmPackageCacheFolderId> {
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self
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.cache_dir
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.resolve_package_folder_id_from_specifier(specifier, registry_url)
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}
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}
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const NPM_PACKAGE_SYNC_LOCK_FILENAME: &str = ".deno_sync_lock";
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pub fn with_folder_sync_lock(
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package: &PackageNv,
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output_folder: &Path,
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action: impl FnOnce() -> Result<(), AnyError>,
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) -> Result<(), AnyError> {
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fn inner(
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output_folder: &Path,
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action: impl FnOnce() -> Result<(), AnyError>,
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) -> Result<(), AnyError> {
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fs::create_dir_all(output_folder).with_context(|| {
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format!("Error creating '{}'.", output_folder.display())
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})?;
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// This sync lock file is a way to ensure that partially created
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// npm package directories aren't considered valid. This could maybe
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// be a bit smarter in the future to not bother extracting here
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// if another process has taken the lock in the past X seconds and
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// wait for the other process to finish (it could try to create the
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// file with `create_new(true)` then if it exists, check the metadata
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// then wait until the other process finishes with a timeout), but
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// for now this is good enough.
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let sync_lock_path = output_folder.join(NPM_PACKAGE_SYNC_LOCK_FILENAME);
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match fs::OpenOptions::new()
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.write(true)
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.create(true)
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.open(&sync_lock_path)
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{
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Ok(_) => {
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action()?;
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// extraction succeeded, so only now delete this file
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let _ignore = std::fs::remove_file(&sync_lock_path);
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Ok(())
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}
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Err(err) => {
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bail!(
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concat!(
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"Error creating package sync lock file at '{}'. ",
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"Maybe try manually deleting this folder.\n\n{:#}",
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),
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output_folder.display(),
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err
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);
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}
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}
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}
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match inner(output_folder, action) {
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Ok(()) => Ok(()),
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Err(err) => {
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if let Err(remove_err) = fs::remove_dir_all(output_folder) {
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if remove_err.kind() != std::io::ErrorKind::NotFound {
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bail!(
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concat!(
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"Failed setting up package cache directory for {}, then ",
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"failed cleaning it up.\n\nOriginal error:\n\n{}\n\n",
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"Remove error:\n\n{}\n\nPlease manually ",
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"delete this folder or you will run into issues using this ",
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"package in the future:\n\n{}"
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),
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package,
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err,
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remove_err,
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output_folder.display(),
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);
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}
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}
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Err(err)
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}
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}
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}
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