deno/cli/resolver.rs

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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use deno_core::anyhow::anyhow;
use deno_core::error::AnyError;
use deno_core::futures::future;
use deno_core::futures::future::LocalBoxFuture;
use deno_core::futures::FutureExt;
use deno_core::ModuleSpecifier;
use deno_graph::source::NpmPackageReqResolution;
use deno_graph::source::NpmResolver;
use deno_graph::source::ResolutionMode;
use deno_graph::source::ResolveError;
use deno_graph::source::Resolver;
use deno_graph::source::UnknownBuiltInNodeModuleError;
use deno_graph::source::DEFAULT_JSX_IMPORT_SOURCE_MODULE;
use deno_runtime::deno_node::is_builtin_node_module;
use deno_semver::package::PackageReq;
use import_map::ImportMap;
use std::path::PathBuf;
use std::sync::Arc;
use crate::args::package_json::PackageJsonDeps;
use crate::args::JsxImportSourceConfig;
use crate::args::PackageJsonDepsProvider;
use crate::npm::CliNpmResolver;
use crate::npm::InnerCliNpmResolverRef;
use crate::util::sync::AtomicFlag;
/// Result of checking if a specifier is mapped via
/// an import map or package.json.
pub enum MappedResolution {
None,
PackageJson(ModuleSpecifier),
ImportMap(ModuleSpecifier),
}
impl MappedResolution {
pub fn into_specifier(self) -> Option<ModuleSpecifier> {
match self {
MappedResolution::None => Option::None,
MappedResolution::PackageJson(specifier) => Some(specifier),
MappedResolution::ImportMap(specifier) => Some(specifier),
}
}
}
/// Resolver for specifiers that could be mapped via an
/// import map or package.json.
#[derive(Debug)]
pub struct MappedSpecifierResolver {
maybe_import_map: Option<Arc<ImportMap>>,
package_json_deps_provider: Arc<PackageJsonDepsProvider>,
}
impl MappedSpecifierResolver {
pub fn new(
maybe_import_map: Option<Arc<ImportMap>>,
package_json_deps_provider: Arc<PackageJsonDepsProvider>,
) -> Self {
Self {
maybe_import_map,
package_json_deps_provider,
}
}
pub fn resolve(
&self,
specifier: &str,
referrer: &ModuleSpecifier,
) -> Result<MappedResolution, AnyError> {
// attempt to resolve with the import map first
let maybe_import_map_err = match self
.maybe_import_map
.as_ref()
.map(|import_map| import_map.resolve(specifier, referrer))
{
Some(Ok(value)) => return Ok(MappedResolution::ImportMap(value)),
Some(Err(err)) => Some(err),
None => None,
};
// then with package.json
if let Some(deps) = self.package_json_deps_provider.deps() {
if let Some(specifier) = resolve_package_json_dep(specifier, deps)? {
return Ok(MappedResolution::PackageJson(specifier));
}
}
// otherwise, surface the import map error or try resolving when has no import map
if let Some(err) = maybe_import_map_err {
Err(err.into())
} else {
Ok(MappedResolution::None)
}
}
}
/// A resolver that takes care of resolution, taking into account loaded
/// import map, JSX settings.
#[derive(Debug)]
pub struct CliGraphResolver {
mapped_specifier_resolver: MappedSpecifierResolver,
maybe_default_jsx_import_source: Option<String>,
maybe_jsx_import_source_module: Option<String>,
maybe_vendor_specifier: Option<ModuleSpecifier>,
npm_resolver: Option<Arc<dyn CliNpmResolver>>,
found_package_json_dep_flag: Arc<AtomicFlag>,
bare_node_builtins_enabled: bool,
}
pub struct CliGraphResolverOptions<'a> {
pub maybe_jsx_import_source_config: Option<JsxImportSourceConfig>,
pub maybe_import_map: Option<Arc<ImportMap>>,
pub maybe_vendor_dir: Option<&'a PathBuf>,
pub bare_node_builtins_enabled: bool,
}
impl CliGraphResolver {
pub fn new(
npm_resolver: Option<Arc<dyn CliNpmResolver>>,
package_json_deps_provider: Arc<PackageJsonDepsProvider>,
options: CliGraphResolverOptions,
) -> Self {
Self {
mapped_specifier_resolver: MappedSpecifierResolver::new(
options.maybe_import_map,
package_json_deps_provider,
),
maybe_default_jsx_import_source: options
.maybe_jsx_import_source_config
.as_ref()
.and_then(|c| c.default_specifier.clone()),
maybe_jsx_import_source_module: options
.maybe_jsx_import_source_config
.map(|c| c.module),
maybe_vendor_specifier: options
.maybe_vendor_dir
.and_then(|v| ModuleSpecifier::from_directory_path(v).ok()),
npm_resolver,
found_package_json_dep_flag: Default::default(),
bare_node_builtins_enabled: options.bare_node_builtins_enabled,
}
}
pub fn as_graph_resolver(&self) -> &dyn Resolver {
self
}
pub fn as_graph_npm_resolver(&self) -> &dyn NpmResolver {
self
}
pub fn found_package_json_dep(&self) -> bool {
self.found_package_json_dep_flag.is_raised()
}
}
impl Resolver for CliGraphResolver {
fn default_jsx_import_source(&self) -> Option<String> {
self.maybe_default_jsx_import_source.clone()
}
fn jsx_import_source_module(&self) -> &str {
self
.maybe_jsx_import_source_module
.as_deref()
.unwrap_or(DEFAULT_JSX_IMPORT_SOURCE_MODULE)
}
fn resolve(
&self,
specifier: &str,
referrer: &ModuleSpecifier,
_mode: ResolutionMode,
) -> Result<ModuleSpecifier, ResolveError> {
let result = match self
.mapped_specifier_resolver
.resolve(specifier, referrer)?
{
MappedResolution::ImportMap(specifier) => Ok(specifier),
MappedResolution::PackageJson(specifier) => {
// found a specifier in the package.json, so mark that
// we need to do an "npm install" later
self.found_package_json_dep_flag.raise();
Ok(specifier)
}
MappedResolution::None => deno_graph::resolve_import(specifier, referrer)
.map_err(|err| err.into()),
};
// When the user is vendoring, don't allow them to import directly from the vendor/ directory
// as it might cause them confusion or duplicate dependencies. Additionally, this folder has
// special treatment in the language server so it will definitely cause issues/confusion there
// if they do this.
if let Some(vendor_specifier) = &self.maybe_vendor_specifier {
if let Ok(specifier) = &result {
if specifier.as_str().starts_with(vendor_specifier.as_str()) {
return Err(ResolveError::Other(anyhow!("Importing from the vendor directory is not permitted. Use a remote specifier instead or disable vendoring.")));
}
}
}
result
}
}
fn resolve_package_json_dep(
specifier: &str,
deps: &PackageJsonDeps,
) -> Result<Option<ModuleSpecifier>, AnyError> {
for (bare_specifier, req_result) in deps {
if specifier.starts_with(bare_specifier) {
let path = &specifier[bare_specifier.len()..];
if path.is_empty() || path.starts_with('/') {
let req = req_result.as_ref().map_err(|err| {
anyhow!(
"Parsing version constraints in the application-level package.json is more strict at the moment.\n\n{:#}",
err.clone()
)
})?;
return Ok(Some(ModuleSpecifier::parse(&format!("npm:{req}{path}"))?));
}
}
}
Ok(None)
}
impl NpmResolver for CliGraphResolver {
fn resolve_builtin_node_module(
&self,
specifier: &ModuleSpecifier,
) -> Result<Option<String>, UnknownBuiltInNodeModuleError> {
if specifier.scheme() != "node" {
return Ok(None);
}
let module_name = specifier.path().to_string();
if is_builtin_node_module(&module_name) {
Ok(Some(module_name))
} else {
Err(UnknownBuiltInNodeModuleError { module_name })
}
}
fn on_resolve_bare_builtin_node_module(
&self,
module_name: &str,
range: &deno_graph::Range,
) {
let deno_graph::Range {
start, specifier, ..
} = range;
let line = start.line + 1;
let column = start.character + 1;
log::warn!("Warning: Resolving \"{module_name}\" as \"node:{module_name}\" at {specifier}:{line}:{column}. If you want to use a built-in Node module, add a \"node:\" prefix.")
}
fn load_and_cache_npm_package_info(
&self,
package_name: &str,
) -> LocalBoxFuture<'static, Result<(), AnyError>> {
match &self.npm_resolver {
Some(npm_resolver) if npm_resolver.as_managed().is_some() => {
let package_name = package_name.to_string();
let npm_resolver = npm_resolver.clone();
async move {
if let Some(managed) = npm_resolver.as_managed() {
managed.cache_package_info(&package_name).await?;
}
Ok(())
}
.boxed()
}
_ => {
// return it succeeded and error at the import site below
Box::pin(future::ready(Ok(())))
}
}
}
fn resolve_npm(&self, package_req: &PackageReq) -> NpmPackageReqResolution {
match &self.npm_resolver {
Some(npm_resolver) => match npm_resolver.as_inner() {
InnerCliNpmResolverRef::Managed(npm_resolver) => {
npm_resolver.resolve_npm_for_deno_graph(package_req)
}
// if we are using byonm, then this should never be called because
// we don't use deno_graph's npm resolution in this case
InnerCliNpmResolverRef::Byonm(_) => unreachable!(),
},
None => NpmPackageReqResolution::Err(anyhow!(
"npm specifiers were requested; but --no-npm is specified"
)),
}
}
fn enables_bare_builtin_node_module(&self) -> bool {
self.bare_node_builtins_enabled
}
}
#[cfg(test)]
mod test {
use std::collections::BTreeMap;
use super::*;
#[test]
fn test_resolve_package_json_dep() {
fn resolve(
specifier: &str,
deps: &BTreeMap<String, PackageReq>,
) -> Result<Option<String>, String> {
let deps = deps
.iter()
.map(|(key, value)| (key.to_string(), Ok(value.clone())))
.collect();
resolve_package_json_dep(specifier, &deps)
.map(|s| s.map(|s| s.to_string()))
.map_err(|err| err.to_string())
}
let deps = BTreeMap::from([
(
"package".to_string(),
PackageReq::from_str("package@1.0").unwrap(),
),
(
"package-alias".to_string(),
PackageReq::from_str("package@^1.2").unwrap(),
),
(
"@deno/test".to_string(),
PackageReq::from_str("@deno/test@~0.2").unwrap(),
),
]);
assert_eq!(
resolve("package", &deps).unwrap(),
Some("npm:package@1.0".to_string()),
);
assert_eq!(
resolve("package/some_path.ts", &deps).unwrap(),
Some("npm:package@1.0/some_path.ts".to_string()),
);
assert_eq!(
resolve("@deno/test", &deps).unwrap(),
Some("npm:@deno/test@~0.2".to_string()),
);
assert_eq!(
resolve("@deno/test/some_path.ts", &deps).unwrap(),
Some("npm:@deno/test@~0.2/some_path.ts".to_string()),
);
// matches the start, but doesn't have the same length or a path
assert_eq!(resolve("@deno/testing", &deps).unwrap(), None,);
// alias
assert_eq!(
resolve("package-alias", &deps).unwrap(),
Some("npm:package@^1.2".to_string()),
);
// non-existent bare specifier
assert_eq!(resolve("non-existent", &deps).unwrap(), None);
}
}