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https://github.com/denoland/deno.git
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386 lines
12 KiB
Rust
386 lines
12 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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//! Code for local node_modules resolution.
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use std::collections::HashSet;
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use std::collections::VecDeque;
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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::AnyError;
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use deno_core::futures::future::BoxFuture;
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use deno_core::futures::FutureExt;
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use deno_core::url::Url;
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use deno_runtime::deno_core::futures;
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use tokio::task::JoinHandle;
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use crate::fs_util;
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use crate::npm::resolution::NpmResolution;
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use crate::npm::resolution::NpmResolutionSnapshot;
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use crate::npm::resolvers::common::should_sync_download;
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use crate::npm::NpmCache;
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use crate::npm::NpmPackageId;
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use crate::npm::NpmPackageReq;
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use crate::npm::NpmRegistryApi;
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use super::common::ensure_registry_read_permission;
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use super::common::InnerNpmPackageResolver;
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/// Resolver that creates a local node_modules directory
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/// and resolves packages from it.
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#[derive(Debug, Clone)]
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pub struct LocalNpmPackageResolver {
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cache: NpmCache,
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resolution: Arc<NpmResolution>,
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registry_url: Url,
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root_node_modules_path: PathBuf,
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root_node_modules_specifier: ModuleSpecifier,
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}
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impl LocalNpmPackageResolver {
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pub fn new(
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cache: NpmCache,
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api: NpmRegistryApi,
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node_modules_folder: PathBuf,
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initial_snapshot: Option<NpmResolutionSnapshot>,
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) -> Self {
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let registry_url = api.base_url().to_owned();
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let resolution = Arc::new(NpmResolution::new(api, initial_snapshot));
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Self {
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cache,
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resolution,
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registry_url,
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root_node_modules_specifier: ModuleSpecifier::from_directory_path(
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&node_modules_folder,
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)
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.unwrap(),
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root_node_modules_path: node_modules_folder,
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}
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}
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fn resolve_package_root(&self, path: &Path) -> PathBuf {
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let mut last_found = path;
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loop {
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let parent = last_found.parent().unwrap();
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if parent.file_name().unwrap() == "node_modules" {
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return last_found.to_path_buf();
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} else {
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last_found = parent;
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}
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}
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}
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fn resolve_folder_for_specifier(
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&self,
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specifier: &ModuleSpecifier,
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) -> Result<PathBuf, AnyError> {
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match self.maybe_resolve_folder_for_specifier(specifier) {
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Some(path) => Ok(path),
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None => bail!("could not find npm package for '{}'", specifier),
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}
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}
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fn maybe_resolve_folder_for_specifier(
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&self,
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specifier: &ModuleSpecifier,
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) -> Option<PathBuf> {
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let relative_url =
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self.root_node_modules_specifier.make_relative(specifier)?;
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if relative_url.starts_with("../") {
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return None;
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}
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// it's within the directory, so use it
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specifier.to_file_path().ok()
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}
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}
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impl InnerNpmPackageResolver for LocalNpmPackageResolver {
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fn resolve_package_folder_from_deno_module(
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&self,
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pkg_req: &NpmPackageReq,
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) -> Result<PathBuf, AnyError> {
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let resolved_package =
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self.resolution.resolve_package_from_deno_module(pkg_req)?;
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// it might be at the full path if there are duplicate names
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let fully_resolved_folder_path = join_package_name(
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&self.root_node_modules_path,
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&resolved_package.id.to_string(),
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);
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Ok(if fully_resolved_folder_path.exists() {
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fully_resolved_folder_path
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} else {
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join_package_name(&self.root_node_modules_path, &resolved_package.id.name)
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})
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}
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fn resolve_package_folder_from_package(
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&self,
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name: &str,
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referrer: &ModuleSpecifier,
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) -> Result<PathBuf, AnyError> {
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let local_path = self.resolve_folder_for_specifier(referrer)?;
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let package_root_path = self.resolve_package_root(&local_path);
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let mut current_folder = package_root_path.as_path();
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loop {
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current_folder = get_next_node_modules_ancestor(current_folder);
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let sub_dir = join_package_name(current_folder, name);
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if sub_dir.is_dir() {
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return Ok(sub_dir);
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}
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if current_folder == self.root_node_modules_path {
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bail!(
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"could not find package '{}' from referrer '{}'.",
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name,
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referrer
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);
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}
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}
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}
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fn resolve_package_folder_from_specifier(
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&self,
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specifier: &ModuleSpecifier,
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) -> Result<PathBuf, AnyError> {
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let local_path = self.resolve_folder_for_specifier(specifier)?;
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let package_root_path = self.resolve_package_root(&local_path);
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Ok(package_root_path)
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}
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fn has_packages(&self) -> bool {
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self.resolution.has_packages()
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}
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fn add_package_reqs(
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&self,
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packages: Vec<NpmPackageReq>,
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) -> BoxFuture<'static, Result<(), AnyError>> {
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let resolver = self.clone();
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async move {
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resolver.resolution.add_package_reqs(packages).await?;
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sync_resolution_with_fs(
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&resolver.resolution.snapshot(),
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&resolver.cache,
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&resolver.registry_url,
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&resolver.root_node_modules_path,
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)
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.await?;
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Ok(())
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}
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.boxed()
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}
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fn ensure_read_permission(&self, path: &Path) -> Result<(), AnyError> {
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ensure_registry_read_permission(&self.root_node_modules_path, path)
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}
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fn snapshot(&self) -> NpmResolutionSnapshot {
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self.resolution.snapshot()
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}
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}
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/// Creates a pnpm style folder structure.
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async fn sync_resolution_with_fs(
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snapshot: &NpmResolutionSnapshot,
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cache: &NpmCache,
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registry_url: &Url,
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root_node_modules_dir_path: &Path,
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) -> Result<(), AnyError> {
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fn get_package_folder_name(package_id: &NpmPackageId) -> String {
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package_id.to_string().replace('/', "+")
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}
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let deno_local_registry_dir = root_node_modules_dir_path.join(".deno");
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fs::create_dir_all(&deno_local_registry_dir).with_context(|| {
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format!("Creating '{}'", deno_local_registry_dir.display())
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})?;
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// 1. Write all the packages out the .deno directory.
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//
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// Copy (hardlink in future) <global_registry_cache>/<package_id>/ to
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// node_modules/.deno/<package_id>/node_modules/<package_name>
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let sync_download = should_sync_download();
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let mut all_packages = snapshot.all_packages();
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if sync_download {
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// we're running the tests not with --quiet
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// and we want the output to be deterministic
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all_packages.sort_by(|a, b| a.id.cmp(&b.id));
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}
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let mut handles: Vec<JoinHandle<Result<(), AnyError>>> =
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Vec::with_capacity(all_packages.len());
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for package in &all_packages {
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let folder_name = get_package_folder_name(&package.id);
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let folder_path = deno_local_registry_dir.join(&folder_name);
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let initialized_file = folder_path.join("deno_initialized");
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if !initialized_file.exists() {
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let cache = cache.clone();
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let registry_url = registry_url.clone();
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let package = package.clone();
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let handle = tokio::task::spawn(async move {
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cache
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.ensure_package(&package.id, &package.dist, ®istry_url)
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.await?;
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let sub_node_modules = folder_path.join("node_modules");
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let package_path =
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join_package_name(&sub_node_modules, &package.id.name);
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fs::create_dir_all(&package_path)
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.with_context(|| format!("Creating '{}'", folder_path.display()))?;
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let cache_folder = cache.package_folder(&package.id, ®istry_url);
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// for now copy, but in the future consider hard linking
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fs_util::copy_dir_recursive(&cache_folder, &package_path)?;
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// write out a file that indicates this folder has been initialized
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fs::write(initialized_file, "")?;
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Ok(())
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});
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if sync_download {
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handle.await??;
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} else {
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handles.push(handle);
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}
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}
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}
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let results = futures::future::join_all(handles).await;
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for result in results {
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result??; // surface the first error
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}
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// 2. Symlink all the dependencies into the .deno directory.
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//
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// Symlink node_modules/.deno/<package_id>/node_modules/<dep_name> to
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// node_modules/.deno/<dep_id>/node_modules/<dep_package_name>
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for package in &all_packages {
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let sub_node_modules = deno_local_registry_dir
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.join(&get_package_folder_name(&package.id))
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.join("node_modules");
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for (name, dep_id) in &package.dependencies {
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let dep_folder_name = get_package_folder_name(dep_id);
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let dep_folder_path = join_package_name(
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&deno_local_registry_dir
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.join(dep_folder_name)
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.join("node_modules"),
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&dep_id.name,
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);
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symlink_package_dir(
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&dep_folder_path,
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&join_package_name(&sub_node_modules, name),
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)?;
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}
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}
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// 3. Create all the packages in the node_modules folder, which are symlinks.
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//
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// Symlink node_modules/<package_name> to
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// node_modules/.deno/<package_id>/node_modules/<package_name>
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let mut found_names = HashSet::new();
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let mut pending_packages = VecDeque::new();
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pending_packages.extend(
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snapshot
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.top_level_packages()
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.into_iter()
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.map(|id| (id, true)),
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);
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while let Some((package_id, is_top_level)) = pending_packages.pop_front() {
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let root_folder_name = if found_names.insert(package_id.name.clone()) {
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package_id.name.clone()
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} else if is_top_level {
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package_id.to_string()
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} else {
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continue; // skip, already handled
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};
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let local_registry_package_path = deno_local_registry_dir
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.join(&get_package_folder_name(&package_id))
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.join("node_modules")
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.join(&package_id.name);
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symlink_package_dir(
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&local_registry_package_path,
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&join_package_name(root_node_modules_dir_path, &root_folder_name),
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)?;
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if let Some(package) = snapshot.package_from_id(&package_id) {
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for id in package.dependencies.values() {
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pending_packages.push_back((id.clone(), false));
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}
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}
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}
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Ok(())
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}
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fn symlink_package_dir(
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old_path: &Path,
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new_path: &Path,
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) -> Result<(), AnyError> {
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let new_parent = new_path.parent().unwrap();
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if new_parent.file_name().unwrap() != "node_modules" {
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// create the parent folder that will contain the symlink
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fs::create_dir_all(new_parent)
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.with_context(|| format!("Creating '{}'", new_parent.display()))?;
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}
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// need to delete the previous symlink before creating a new one
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let _ignore = fs::remove_dir_all(new_path);
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#[cfg(windows)]
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return junction_or_symlink_dir(old_path, new_path);
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#[cfg(not(windows))]
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fs_util::symlink_dir(old_path, new_path)
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}
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#[cfg(windows)]
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fn junction_or_symlink_dir(
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old_path: &Path,
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new_path: &Path,
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) -> Result<(), AnyError> {
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// Use junctions because they're supported on ntfs file systems without
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// needing to elevate privileges on Windows
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match junction::create(old_path, new_path) {
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Ok(()) => Ok(()),
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Err(junction_err) => {
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if cfg!(debug) {
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// When running the tests, junctions should be created, but if not then
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// surface this error.
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log::warn!("Error creating junction. {:#}", junction_err);
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}
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match fs_util::symlink_dir(old_path, new_path) {
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Ok(()) => Ok(()),
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Err(symlink_err) => bail!(
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concat!(
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"Failed creating junction and fallback symlink in node_modules folder.\n\n",
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"{:#}\n\n{:#}",
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),
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junction_err,
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symlink_err,
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),
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}
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}
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}
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}
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fn join_package_name(path: &Path, package_name: &str) -> PathBuf {
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let mut path = path.to_path_buf();
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// ensure backslashes are used on windows
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for part in package_name.split('/') {
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path = path.join(part);
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}
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path
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}
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fn get_next_node_modules_ancestor(mut path: &Path) -> &Path {
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loop {
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path = path.parent().unwrap();
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let file_name = path.file_name().unwrap().to_string_lossy();
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if file_name == "node_modules" {
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return path;
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}
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}
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}
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