mirror of
https://github.com/denoland/deno
synced 2024-08-25 02:57:22 +00:00
202 lines
6.4 KiB
Rust
202 lines
6.4 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 deno_ast::swc::common::SyntaxContext;
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use deno_ast::view::Node;
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use deno_ast::view::NodeTrait;
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use deno_ast::CjsAnalysis;
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use deno_ast::MediaType;
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use deno_ast::ModuleSpecifier;
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use deno_ast::ParsedSource;
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use deno_ast::SourceRanged;
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use deno_core::error::AnyError;
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use deno_runtime::deno_node::analyze::CjsAnalysis as ExtNodeCjsAnalysis;
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use deno_runtime::deno_node::analyze::CjsEsmCodeAnalyzer;
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use deno_runtime::deno_node::analyze::NodeCodeTranslator;
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use crate::cache::NodeAnalysisCache;
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use crate::util::fs::canonicalize_path_maybe_not_exists;
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pub type CliNodeCodeTranslator = NodeCodeTranslator<CliCjsEsmCodeAnalyzer>;
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/// Resolves a specifier that is pointing into a node_modules folder.
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///
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/// Note: This should be called whenever getting the specifier from
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/// a Module::External(module) reference because that module might
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/// not be fully resolved at the time deno_graph is analyzing it
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/// because the node_modules folder might not exist at that time.
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pub fn resolve_specifier_into_node_modules(
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specifier: &ModuleSpecifier,
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) -> ModuleSpecifier {
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specifier
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.to_file_path()
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.ok()
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// this path might not exist at the time the graph is being created
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// because the node_modules folder might not yet exist
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.and_then(|path| canonicalize_path_maybe_not_exists(&path).ok())
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.and_then(|path| ModuleSpecifier::from_file_path(path).ok())
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.unwrap_or_else(|| specifier.clone())
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}
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pub struct CliCjsEsmCodeAnalyzer {
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cache: NodeAnalysisCache,
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}
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impl CliCjsEsmCodeAnalyzer {
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pub fn new(cache: NodeAnalysisCache) -> Self {
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Self { cache }
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}
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fn inner_cjs_analysis(
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&self,
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specifier: &ModuleSpecifier,
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source: &str,
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) -> Result<CjsAnalysis, AnyError> {
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let source_hash = NodeAnalysisCache::compute_source_hash(source);
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if let Some(analysis) = self
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.cache
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.get_cjs_analysis(specifier.as_str(), &source_hash)
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{
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return Ok(analysis);
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}
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let media_type = MediaType::from_specifier(specifier);
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if media_type == MediaType::Json {
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return Ok(CjsAnalysis {
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exports: vec![],
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reexports: vec![],
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});
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}
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let parsed_source = deno_ast::parse_script(deno_ast::ParseParams {
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specifier: specifier.to_string(),
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text_info: deno_ast::SourceTextInfo::new(source.into()),
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media_type,
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capture_tokens: true,
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scope_analysis: false,
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maybe_syntax: None,
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})?;
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let analysis = parsed_source.analyze_cjs();
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self
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.cache
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.set_cjs_analysis(specifier.as_str(), &source_hash, &analysis);
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Ok(analysis)
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}
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}
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impl CjsEsmCodeAnalyzer for CliCjsEsmCodeAnalyzer {
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fn analyze_cjs(
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&self,
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specifier: &ModuleSpecifier,
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source: &str,
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) -> Result<ExtNodeCjsAnalysis, AnyError> {
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let analysis = self.inner_cjs_analysis(specifier, source)?;
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Ok(ExtNodeCjsAnalysis {
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exports: analysis.exports,
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reexports: analysis.reexports,
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})
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}
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fn analyze_esm_top_level_decls(
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&self,
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specifier: &ModuleSpecifier,
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source: &str,
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) -> Result<HashSet<String>, AnyError> {
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// TODO(dsherret): this code is way more inefficient than it needs to be.
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//
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// In the future, we should disable capturing tokens & scope analysis
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// and instead only use swc's APIs to go through the portions of the tree
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// that we know will affect the global scope while still ensuring that
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// `var` decls are taken into consideration.
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let source_hash = NodeAnalysisCache::compute_source_hash(source);
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if let Some(decls) = self
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.cache
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.get_esm_analysis(specifier.as_str(), &source_hash)
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{
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Ok(HashSet::from_iter(decls))
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} else {
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let parsed_source = deno_ast::parse_program(deno_ast::ParseParams {
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specifier: specifier.to_string(),
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text_info: deno_ast::SourceTextInfo::from_string(source.to_string()),
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media_type: deno_ast::MediaType::from_specifier(specifier),
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capture_tokens: true,
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scope_analysis: true,
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maybe_syntax: None,
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})?;
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let top_level_decls = analyze_top_level_decls(&parsed_source)?;
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self.cache.set_esm_analysis(
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specifier.as_str(),
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&source_hash,
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&top_level_decls.clone().into_iter().collect::<Vec<_>>(),
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);
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Ok(top_level_decls)
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}
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}
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}
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fn analyze_top_level_decls(
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parsed_source: &ParsedSource,
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) -> Result<HashSet<String>, AnyError> {
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fn visit_children(
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node: Node,
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top_level_context: SyntaxContext,
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results: &mut HashSet<String>,
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) {
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if let Node::Ident(ident) = node {
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if ident.ctxt() == top_level_context && is_local_declaration_ident(node) {
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results.insert(ident.sym().to_string());
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}
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}
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for child in node.children() {
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visit_children(child, top_level_context, results);
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}
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}
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let top_level_context = parsed_source.top_level_context();
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parsed_source.with_view(|program| {
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let mut results = HashSet::new();
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visit_children(program.into(), top_level_context, &mut results);
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Ok(results)
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})
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}
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fn is_local_declaration_ident(node: Node) -> bool {
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if let Some(parent) = node.parent() {
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match parent {
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Node::BindingIdent(decl) => decl.id.range().contains(&node.range()),
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Node::ClassDecl(decl) => decl.ident.range().contains(&node.range()),
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Node::ClassExpr(decl) => decl
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.ident
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.as_ref()
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.map(|i| i.range().contains(&node.range()))
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.unwrap_or(false),
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Node::TsInterfaceDecl(decl) => decl.id.range().contains(&node.range()),
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Node::FnDecl(decl) => decl.ident.range().contains(&node.range()),
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Node::FnExpr(decl) => decl
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.ident
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.as_ref()
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.map(|i| i.range().contains(&node.range()))
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.unwrap_or(false),
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Node::TsModuleDecl(decl) => decl.id.range().contains(&node.range()),
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Node::TsNamespaceDecl(decl) => decl.id.range().contains(&node.range()),
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Node::VarDeclarator(decl) => decl.name.range().contains(&node.range()),
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Node::ImportNamedSpecifier(decl) => {
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decl.local.range().contains(&node.range())
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}
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Node::ImportDefaultSpecifier(decl) => {
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decl.local.range().contains(&node.range())
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}
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Node::ImportStarAsSpecifier(decl) => decl.range().contains(&node.range()),
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Node::KeyValuePatProp(decl) => decl.key.range().contains(&node.range()),
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Node::AssignPatProp(decl) => decl.key.range().contains(&node.range()),
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_ => false,
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}
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} else {
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false
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}
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}
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