mirror of
https://github.com/denoland/deno.git
synced 2024-11-29 16:30:56 -05:00
468 lines
13 KiB
Rust
468 lines
13 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use deno_ast::LineAndColumnIndex;
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use deno_ast::ModuleSpecifier;
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use deno_ast::SourceTextInfo;
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use deno_core::error::AnyError;
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use deno_graph::MediaType;
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use deno_graph::Module;
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use deno_graph::ModuleGraph;
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use deno_graph::Position;
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use deno_graph::Range;
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use deno_graph::Resolved;
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use import_map::ImportMap;
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use import_map::SpecifierMap;
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use indexmap::IndexMap;
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use log::warn;
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use crate::cache::ParsedSourceCache;
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use super::mappings::Mappings;
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use super::specifiers::is_remote_specifier;
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use super::specifiers::is_remote_specifier_text;
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struct ImportMapBuilder<'a> {
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base_dir: &'a ModuleSpecifier,
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mappings: &'a Mappings,
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imports: ImportsBuilder<'a>,
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scopes: IndexMap<String, ImportsBuilder<'a>>,
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}
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impl<'a> ImportMapBuilder<'a> {
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pub fn new(base_dir: &'a ModuleSpecifier, mappings: &'a Mappings) -> Self {
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ImportMapBuilder {
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base_dir,
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mappings,
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imports: ImportsBuilder::new(base_dir, mappings),
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scopes: Default::default(),
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}
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}
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pub fn base_dir(&self) -> &ModuleSpecifier {
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self.base_dir
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}
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pub fn scope(
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&mut self,
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base_specifier: &ModuleSpecifier,
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) -> &mut ImportsBuilder<'a> {
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self
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.scopes
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.entry(
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self
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.mappings
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.relative_specifier_text(self.base_dir, base_specifier),
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)
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.or_insert_with(|| ImportsBuilder::new(self.base_dir, self.mappings))
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}
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pub fn into_import_map(
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self,
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original_import_map: Option<&ImportMap>,
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) -> ImportMap {
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fn get_local_imports(
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new_relative_path: &str,
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original_imports: &SpecifierMap,
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) -> Vec<(String, String)> {
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let mut result = Vec::new();
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for entry in original_imports.entries() {
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if let Some(raw_value) = entry.raw_value {
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if raw_value.starts_with("./") || raw_value.starts_with("../") {
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let sub_index = raw_value.find('/').unwrap() + 1;
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result.push((
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entry.raw_key.to_string(),
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format!("{}{}", new_relative_path, &raw_value[sub_index..]),
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));
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}
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}
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}
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result
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}
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fn add_local_imports<'a>(
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new_relative_path: &str,
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original_imports: &SpecifierMap,
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get_new_imports: impl FnOnce() -> &'a mut SpecifierMap,
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) {
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let local_imports =
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get_local_imports(new_relative_path, original_imports);
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if !local_imports.is_empty() {
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let new_imports = get_new_imports();
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for (key, value) in local_imports {
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if let Err(warning) = new_imports.append(key, value) {
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warn!("{}", warning);
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}
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}
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}
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}
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let mut import_map = ImportMap::new(self.base_dir.clone());
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if let Some(original_im) = original_import_map {
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let original_base_dir = ModuleSpecifier::from_directory_path(
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original_im
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.base_url()
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.to_file_path()
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.unwrap()
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.parent()
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.unwrap(),
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)
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.unwrap();
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let new_relative_path = self
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.mappings
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.relative_specifier_text(self.base_dir, &original_base_dir);
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// add the imports
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add_local_imports(&new_relative_path, original_im.imports(), || {
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import_map.imports_mut()
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});
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for scope in original_im.scopes() {
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if scope.raw_key.starts_with("./") || scope.raw_key.starts_with("../") {
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let sub_index = scope.raw_key.find('/').unwrap() + 1;
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let new_key =
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format!("{}{}", new_relative_path, &scope.raw_key[sub_index..]);
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add_local_imports(&new_relative_path, scope.imports, || {
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import_map.get_or_append_scope_mut(&new_key).unwrap()
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});
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}
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}
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}
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let imports = import_map.imports_mut();
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for (key, value) in self.imports.imports {
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if !imports.contains(&key) {
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imports.append(key, value).unwrap();
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}
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}
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for (scope_key, scope_value) in self.scopes {
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if !scope_value.imports.is_empty() {
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let imports = import_map.get_or_append_scope_mut(&scope_key).unwrap();
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for (key, value) in scope_value.imports {
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if !imports.contains(&key) {
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imports.append(key, value).unwrap();
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}
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}
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}
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}
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import_map
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}
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}
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struct ImportsBuilder<'a> {
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base_dir: &'a ModuleSpecifier,
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mappings: &'a Mappings,
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imports: IndexMap<String, String>,
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}
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impl<'a> ImportsBuilder<'a> {
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pub fn new(base_dir: &'a ModuleSpecifier, mappings: &'a Mappings) -> Self {
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Self {
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base_dir,
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mappings,
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imports: Default::default(),
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}
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}
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pub fn add(&mut self, key: String, specifier: &ModuleSpecifier) {
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let value = self
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.mappings
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.relative_specifier_text(self.base_dir, specifier);
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// skip creating identity entries
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if key != value {
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self.imports.insert(key, value);
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}
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}
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}
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pub fn build_import_map(
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base_dir: &ModuleSpecifier,
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graph: &ModuleGraph,
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modules: &[&Module],
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mappings: &Mappings,
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original_import_map: Option<&ImportMap>,
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parsed_source_cache: &ParsedSourceCache,
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) -> Result<String, AnyError> {
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let mut builder = ImportMapBuilder::new(base_dir, mappings);
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visit_modules(graph, modules, mappings, &mut builder, parsed_source_cache)?;
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for base_specifier in mappings.base_specifiers() {
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builder
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.imports
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.add(base_specifier.to_string(), base_specifier);
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}
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Ok(builder.into_import_map(original_import_map).to_json())
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}
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fn visit_modules(
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graph: &ModuleGraph,
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modules: &[&Module],
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mappings: &Mappings,
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import_map: &mut ImportMapBuilder,
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parsed_source_cache: &ParsedSourceCache,
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) -> Result<(), AnyError> {
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for module in modules {
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if module.media_type == MediaType::Json {
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// skip visiting Json modules as they are leaves
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continue;
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}
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let text_info =
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match parsed_source_cache.get_parsed_source_from_module(module)? {
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Some(source) => source.text_info().clone(),
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None => continue,
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};
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let source_text = match &module.maybe_source {
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Some(source) => source,
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None => continue,
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};
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for dep in module.dependencies.values() {
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visit_maybe_resolved(
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&dep.maybe_code,
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graph,
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import_map,
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&module.specifier,
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mappings,
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&text_info,
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source_text,
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);
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visit_maybe_resolved(
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&dep.maybe_type,
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graph,
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import_map,
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&module.specifier,
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mappings,
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&text_info,
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source_text,
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);
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}
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if let Some((_, maybe_resolved)) = &module.maybe_types_dependency {
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visit_maybe_resolved(
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maybe_resolved,
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graph,
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import_map,
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&module.specifier,
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mappings,
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&text_info,
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source_text,
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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 visit_maybe_resolved(
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maybe_resolved: &Resolved,
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graph: &ModuleGraph,
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import_map: &mut ImportMapBuilder,
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referrer: &ModuleSpecifier,
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mappings: &Mappings,
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text_info: &SourceTextInfo,
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source_text: &str,
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) {
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if let Resolved::Ok {
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specifier, range, ..
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} = maybe_resolved
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{
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let text = text_from_range(text_info, source_text, range);
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// if the text is empty then it's probably an x-TypeScript-types
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if !text.is_empty() {
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handle_dep_specifier(
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text, specifier, graph, import_map, referrer, mappings,
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);
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}
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}
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}
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fn handle_dep_specifier(
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text: &str,
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unresolved_specifier: &ModuleSpecifier,
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graph: &ModuleGraph,
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import_map: &mut ImportMapBuilder,
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referrer: &ModuleSpecifier,
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mappings: &Mappings,
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) {
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let specifier = graph.resolve(unresolved_specifier);
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// check if it's referencing a remote module
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if is_remote_specifier(&specifier) {
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handle_remote_dep_specifier(
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text,
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unresolved_specifier,
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&specifier,
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import_map,
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referrer,
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mappings,
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)
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} else {
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handle_local_dep_specifier(
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text,
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unresolved_specifier,
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&specifier,
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import_map,
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referrer,
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mappings,
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);
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}
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}
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fn handle_remote_dep_specifier(
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text: &str,
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unresolved_specifier: &ModuleSpecifier,
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specifier: &ModuleSpecifier,
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import_map: &mut ImportMapBuilder,
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referrer: &ModuleSpecifier,
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mappings: &Mappings,
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) {
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if is_remote_specifier_text(text) {
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let base_specifier = mappings.base_specifier(specifier);
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if !text.starts_with(base_specifier.as_str()) {
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panic!("Expected {} to start with {}", text, base_specifier);
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}
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let sub_path = &text[base_specifier.as_str().len()..];
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let relative_text =
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mappings.relative_specifier_text(base_specifier, specifier);
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let expected_sub_path = relative_text.trim_start_matches("./");
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if expected_sub_path != sub_path {
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import_map.imports.add(text.to_string(), specifier);
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}
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} else {
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let expected_relative_specifier_text =
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mappings.relative_specifier_text(referrer, specifier);
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if expected_relative_specifier_text == text {
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return;
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}
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if !is_remote_specifier(referrer) {
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// local module referencing a remote module using
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// non-remote specifier text means it was something in
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// the original import map, so add a mapping to it
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import_map.imports.add(text.to_string(), specifier);
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return;
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}
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let base_referrer = mappings.base_specifier(referrer);
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let base_dir = import_map.base_dir().clone();
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let imports = import_map.scope(base_referrer);
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if text.starts_with("./") || text.starts_with("../") {
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// resolve relative specifier key
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let mut local_base_specifier = mappings.local_uri(base_referrer);
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local_base_specifier = local_base_specifier
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// path includes "/" so make it relative
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.join(&format!(".{}", unresolved_specifier.path()))
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.unwrap_or_else(|_| {
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panic!(
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"Error joining {} to {}",
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unresolved_specifier.path(),
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local_base_specifier
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)
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});
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local_base_specifier.set_query(unresolved_specifier.query());
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imports.add(
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mappings.relative_specifier_text(&base_dir, &local_base_specifier),
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specifier,
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);
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// add a mapping that uses the local directory name and the remote
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// filename in order to support files importing this relatively
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imports.add(
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{
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let local_path = mappings.local_path(specifier);
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let mut value =
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ModuleSpecifier::from_directory_path(local_path.parent().unwrap())
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.unwrap();
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value.set_query(specifier.query());
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value.set_path(&format!(
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"{}{}",
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value.path(),
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specifier.path_segments().unwrap().last().unwrap(),
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));
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mappings.relative_specifier_text(&base_dir, &value)
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},
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specifier,
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);
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} else {
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// absolute (`/`) or bare specifier should be left as-is
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imports.add(text.to_string(), specifier);
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}
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}
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}
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fn handle_local_dep_specifier(
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text: &str,
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unresolved_specifier: &ModuleSpecifier,
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specifier: &ModuleSpecifier,
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import_map: &mut ImportMapBuilder,
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referrer: &ModuleSpecifier,
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mappings: &Mappings,
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) {
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if !is_remote_specifier(referrer) {
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// do not handle local modules referencing local modules
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return;
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}
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// The remote module is referencing a local file. This could occur via an
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// existing import map. In this case, we'll have to add an import map
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// entry in order to map the path back to the local path once vendored.
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let base_dir = import_map.base_dir().clone();
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let base_specifier = mappings.base_specifier(referrer);
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let imports = import_map.scope(base_specifier);
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if text.starts_with("./") || text.starts_with("../") {
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let referrer_local_uri = mappings.local_uri(referrer);
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let mut specifier_local_uri =
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referrer_local_uri.join(text).unwrap_or_else(|_| {
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panic!(
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"Error joining {} to {}",
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unresolved_specifier.path(),
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referrer_local_uri
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)
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});
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specifier_local_uri.set_query(unresolved_specifier.query());
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imports.add(
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mappings.relative_specifier_text(&base_dir, &specifier_local_uri),
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specifier,
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);
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} else {
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imports.add(text.to_string(), specifier);
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}
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}
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fn text_from_range<'a>(
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text_info: &SourceTextInfo,
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text: &'a str,
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range: &Range,
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) -> &'a str {
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let result = &text[byte_range(text_info, range)];
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if result.starts_with('"') || result.starts_with('\'') {
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// remove the quotes
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&result[1..result.len() - 1]
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} else {
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result
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}
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}
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fn byte_range(
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text_info: &SourceTextInfo,
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range: &Range,
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) -> std::ops::Range<usize> {
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let start = byte_index(text_info, &range.start);
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let end = byte_index(text_info, &range.end);
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start..end
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}
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fn byte_index(text_info: &SourceTextInfo, pos: &Position) -> usize {
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// todo(https://github.com/denoland/deno_graph/issues/79): use byte indexes all the way down
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text_info.loc_to_source_pos(LineAndColumnIndex {
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line_index: pos.line,
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column_index: pos.character,
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}) - text_info.range().start
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}
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