mirror of
https://github.com/denoland/deno.git
synced 2024-11-22 15:06:54 -05:00
672 lines
17 KiB
Rust
672 lines
17 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use crate::doc::Location;
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use crate::msg::MediaType;
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use crate::swc_common;
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use crate::swc_common::comments::CommentKind;
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use crate::swc_common::comments::Comments;
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use crate::swc_common::errors::Diagnostic;
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use crate::swc_common::errors::DiagnosticBuilder;
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use crate::swc_common::errors::Emitter;
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use crate::swc_common::errors::Handler;
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use crate::swc_common::errors::HandlerFlags;
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use crate::swc_common::FileName;
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use crate::swc_common::Globals;
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use crate::swc_common::SourceMap;
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use crate::swc_common::Span;
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use crate::swc_ecma_ast;
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use crate::swc_ecma_parser::lexer::Lexer;
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use crate::swc_ecma_parser::EsConfig;
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use crate::swc_ecma_parser::JscTarget;
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use crate::swc_ecma_parser::Parser;
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use crate::swc_ecma_parser::Session;
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use crate::swc_ecma_parser::SourceFileInput;
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use crate::swc_ecma_parser::Syntax;
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use crate::swc_ecma_parser::TsConfig;
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use std::error::Error;
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use std::fmt;
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use std::sync::Arc;
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use std::sync::RwLock;
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use swc_ecma_visit::Node;
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use swc_ecma_visit::Visit;
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fn get_default_es_config() -> EsConfig {
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let mut config = EsConfig::default();
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config.num_sep = true;
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config.class_private_props = true;
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config.class_private_methods = true;
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config.class_props = true;
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config.export_default_from = true;
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config.export_namespace_from = true;
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config.dynamic_import = true;
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config.nullish_coalescing = true;
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config.optional_chaining = true;
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config.import_meta = true;
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config.top_level_await = true;
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config
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}
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fn get_default_ts_config() -> TsConfig {
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let mut ts_config = TsConfig::default();
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ts_config.dynamic_import = true;
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ts_config.decorators = true;
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ts_config
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}
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#[derive(Clone, Debug)]
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pub struct SwcDiagnosticBuffer {
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pub diagnostics: Vec<String>,
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}
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impl Error for SwcDiagnosticBuffer {}
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impl fmt::Display for SwcDiagnosticBuffer {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let msg = self.diagnostics.join(",");
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f.pad(&msg)
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}
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}
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impl SwcDiagnosticBuffer {
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pub fn from_swc_error(
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error_buffer: SwcErrorBuffer,
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parser: &AstParser,
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) -> Self {
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let s = error_buffer.0.read().unwrap().clone();
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let diagnostics = s
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.iter()
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.map(|d| {
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let mut msg = d.message();
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if let Some(span) = d.span.primary_span() {
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let location = parser.get_span_location(span);
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let filename = match &location.file.name {
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FileName::Custom(n) => n,
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_ => unreachable!(),
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};
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msg = format!(
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"{} at {}:{}:{}",
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msg, filename, location.line, location.col_display
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);
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}
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msg
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})
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.collect::<Vec<String>>();
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Self { diagnostics }
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}
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}
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#[derive(Clone)]
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pub struct SwcErrorBuffer(Arc<RwLock<Vec<Diagnostic>>>);
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impl SwcErrorBuffer {
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pub fn default() -> Self {
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Self(Arc::new(RwLock::new(vec![])))
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}
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}
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impl Emitter for SwcErrorBuffer {
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fn emit(&mut self, db: &DiagnosticBuilder) {
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self.0.write().unwrap().push((**db).clone());
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}
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}
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/// Low-level utility structure with common AST parsing functions.
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///
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/// Allows to build more complicated parser by providing a callback
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/// to `parse_module`.
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pub struct AstParser {
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pub buffered_error: SwcErrorBuffer,
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pub source_map: Arc<SourceMap>,
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pub handler: Handler,
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pub comments: Comments,
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pub globals: Globals,
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}
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impl AstParser {
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pub fn new() -> Self {
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let buffered_error = SwcErrorBuffer::default();
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let handler = Handler::with_emitter_and_flags(
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Box::new(buffered_error.clone()),
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HandlerFlags {
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dont_buffer_diagnostics: true,
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can_emit_warnings: true,
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..Default::default()
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},
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);
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AstParser {
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buffered_error,
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source_map: Arc::new(SourceMap::default()),
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handler,
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comments: Comments::default(),
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globals: Globals::new(),
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}
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}
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pub fn parse_module<F, R>(
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&self,
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file_name: &str,
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media_type: MediaType,
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source_code: &str,
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callback: F,
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) -> R
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where
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F: FnOnce(Result<swc_ecma_ast::Module, SwcDiagnosticBuffer>) -> R,
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{
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swc_common::GLOBALS.set(&self.globals, || {
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let swc_source_file = self.source_map.new_source_file(
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FileName::Custom(file_name.to_string()),
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source_code.to_string(),
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);
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let buffered_err = self.buffered_error.clone();
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let session = Session {
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handler: &self.handler,
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};
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let syntax = match media_type {
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MediaType::JavaScript => Syntax::Es(get_default_es_config()),
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MediaType::JSX => {
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let mut config = get_default_es_config();
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config.jsx = true;
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Syntax::Es(config)
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}
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MediaType::TypeScript => Syntax::Typescript(get_default_ts_config()),
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MediaType::TSX => {
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let mut config = get_default_ts_config();
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config.tsx = true;
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Syntax::Typescript(config)
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}
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_ => Syntax::Es(get_default_es_config()),
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};
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let lexer = Lexer::new(
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session,
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syntax,
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JscTarget::Es2019,
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SourceFileInput::from(&*swc_source_file),
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Some(&self.comments),
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);
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let mut parser = Parser::new_from(session, lexer);
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let parse_result =
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parser
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.parse_module()
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.map_err(move |mut err: DiagnosticBuilder| {
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err.emit();
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SwcDiagnosticBuffer::from_swc_error(buffered_err, self)
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});
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callback(parse_result)
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})
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}
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pub fn get_span_location(&self, span: Span) -> swc_common::Loc {
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self.source_map.lookup_char_pos(span.lo())
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}
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pub fn get_span_comments(
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&self,
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span: Span,
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) -> Vec<swc_common::comments::Comment> {
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let maybe_comments = self.comments.take_leading_comments(span.lo());
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if let Some(comments) = maybe_comments {
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// clone the comments and put them back in map
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let to_return = comments.clone();
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self.comments.add_leading(span.lo(), comments);
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to_return
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} else {
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vec![]
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}
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}
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}
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struct DependencyVisitor {
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dependencies: Vec<String>,
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analyze_dynamic_imports: bool,
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}
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impl Visit for DependencyVisitor {
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fn visit_import_decl(
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&mut self,
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import_decl: &swc_ecma_ast::ImportDecl,
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_parent: &dyn Node,
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) {
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let src_str = import_decl.src.value.to_string();
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self.dependencies.push(src_str);
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}
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fn visit_named_export(
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&mut self,
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named_export: &swc_ecma_ast::NamedExport,
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_parent: &dyn Node,
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) {
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if let Some(src) = &named_export.src {
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let src_str = src.value.to_string();
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self.dependencies.push(src_str);
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}
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}
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fn visit_export_all(
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&mut self,
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export_all: &swc_ecma_ast::ExportAll,
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_parent: &dyn Node,
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) {
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let src_str = export_all.src.value.to_string();
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self.dependencies.push(src_str);
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}
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fn visit_call_expr(
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&mut self,
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call_expr: &swc_ecma_ast::CallExpr,
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_parent: &dyn Node,
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) {
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if !self.analyze_dynamic_imports {
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return;
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}
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use swc_ecma_ast::Expr::*;
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use swc_ecma_ast::ExprOrSuper::*;
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let boxed_expr = match call_expr.callee.clone() {
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Super(_) => return,
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Expr(boxed) => boxed,
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};
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match &*boxed_expr {
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Ident(ident) => {
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if &ident.sym.to_string() != "import" {
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return;
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}
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}
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_ => return,
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};
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if let Some(arg) = call_expr.args.get(0) {
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match &*arg.expr {
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Lit(lit) => {
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if let swc_ecma_ast::Lit::Str(str_) = lit {
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let src_str = str_.value.to_string();
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self.dependencies.push(src_str);
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}
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}
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_ => return,
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}
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}
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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enum DependencyKind {
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Import,
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DynamicImport,
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Export,
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}
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#[derive(Clone, Debug, PartialEq)]
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struct DependencyDescriptor {
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span: Span,
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specifier: String,
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kind: DependencyKind,
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}
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struct NewDependencyVisitor {
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dependencies: Vec<DependencyDescriptor>,
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}
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impl Visit for NewDependencyVisitor {
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fn visit_import_decl(
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&mut self,
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import_decl: &swc_ecma_ast::ImportDecl,
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_parent: &dyn Node,
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) {
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let src_str = import_decl.src.value.to_string();
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self.dependencies.push(DependencyDescriptor {
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specifier: src_str,
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kind: DependencyKind::Import,
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span: import_decl.span,
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});
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}
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fn visit_named_export(
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&mut self,
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named_export: &swc_ecma_ast::NamedExport,
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_parent: &dyn Node,
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) {
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if let Some(src) = &named_export.src {
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let src_str = src.value.to_string();
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self.dependencies.push(DependencyDescriptor {
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specifier: src_str,
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kind: DependencyKind::Export,
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span: named_export.span,
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});
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}
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}
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fn visit_export_all(
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&mut self,
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export_all: &swc_ecma_ast::ExportAll,
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_parent: &dyn Node,
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) {
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let src_str = export_all.src.value.to_string();
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self.dependencies.push(DependencyDescriptor {
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specifier: src_str,
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kind: DependencyKind::Export,
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span: export_all.span,
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});
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}
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fn visit_ts_import_type(
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&mut self,
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ts_import_type: &swc_ecma_ast::TsImportType,
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_parent: &dyn Node,
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) {
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// TODO(bartlomieju): possibly add separate DependencyKind
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let src_str = ts_import_type.arg.value.to_string();
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self.dependencies.push(DependencyDescriptor {
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specifier: src_str,
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kind: DependencyKind::Import,
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span: ts_import_type.arg.span,
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});
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}
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fn visit_call_expr(
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&mut self,
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call_expr: &swc_ecma_ast::CallExpr,
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parent: &dyn Node,
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) {
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use swc_ecma_ast::Expr::*;
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use swc_ecma_ast::ExprOrSuper::*;
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swc_ecma_visit::visit_call_expr(self, call_expr, parent);
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let boxed_expr = match call_expr.callee.clone() {
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Super(_) => return,
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Expr(boxed) => boxed,
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};
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match &*boxed_expr {
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Ident(ident) => {
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if &ident.sym.to_string() != "import" {
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return;
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}
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}
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_ => return,
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};
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if let Some(arg) = call_expr.args.get(0) {
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match &*arg.expr {
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Lit(lit) => {
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if let swc_ecma_ast::Lit::Str(str_) = lit {
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let src_str = str_.value.to_string();
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self.dependencies.push(DependencyDescriptor {
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specifier: src_str,
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kind: DependencyKind::DynamicImport,
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span: call_expr.span,
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});
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}
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}
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_ => return,
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}
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}
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}
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}
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fn get_deno_types(parser: &AstParser, span: Span) -> Option<String> {
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let comments = parser.get_span_comments(span);
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if comments.is_empty() {
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return None;
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}
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// @deno-types must directly prepend import statement - hence
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// checking last comment for span
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let last = comments.last().unwrap();
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let comment = last.text.trim_start();
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if comment.starts_with("@deno-types") {
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let split: Vec<String> =
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comment.split('=').map(|s| s.to_string()).collect();
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assert_eq!(split.len(), 2);
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let specifier_in_quotes = split.get(1).unwrap().to_string();
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let specifier = specifier_in_quotes
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.trim_start_matches('\"')
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.trim_start_matches('\'')
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.trim_end_matches('\"')
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.trim_end_matches('\'')
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.to_string();
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return Some(specifier);
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}
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None
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct ImportDescriptor {
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pub specifier: String,
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pub deno_types: Option<String>,
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pub location: Location,
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}
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#[derive(Clone, Debug, PartialEq)]
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pub enum TsReferenceKind {
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Lib,
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Types,
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Path,
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct TsReferenceDescriptor {
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pub kind: TsReferenceKind,
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pub specifier: String,
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pub location: Location,
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}
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pub fn analyze_dependencies_and_references(
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file_name: &str,
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media_type: MediaType,
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source_code: &str,
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analyze_dynamic_imports: bool,
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) -> Result<
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(Vec<ImportDescriptor>, Vec<TsReferenceDescriptor>),
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SwcDiagnosticBuffer,
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> {
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let parser = AstParser::new();
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parser.parse_module(file_name, media_type, source_code, |parse_result| {
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let module = parse_result?;
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let mut collector = NewDependencyVisitor {
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dependencies: vec![],
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};
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let module_span = module.span;
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collector.visit_module(&module, &module);
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let dependency_descriptors = collector.dependencies;
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// for each import check if there's relevant @deno-types directive
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let imports = dependency_descriptors
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.iter()
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.filter(|desc| {
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if analyze_dynamic_imports {
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return true;
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}
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desc.kind != DependencyKind::DynamicImport
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})
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.map(|desc| {
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let location = parser.get_span_location(desc.span);
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if desc.kind == DependencyKind::Import {
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let deno_types = get_deno_types(&parser, desc.span);
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ImportDescriptor {
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specifier: desc.specifier.to_string(),
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deno_types,
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location: location.into(),
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}
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} else {
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ImportDescriptor {
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specifier: desc.specifier.to_string(),
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deno_types: None,
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location: location.into(),
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}
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}
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})
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.collect();
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// analyze comment from beginning of the file and find TS directives
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let comments = parser
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.comments
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.take_leading_comments(module_span.lo())
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.unwrap_or_else(Vec::new);
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let mut references = vec![];
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for comment in comments {
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if comment.kind != CommentKind::Line {
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continue;
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}
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// TODO(bartlomieju): you can do better than that...
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let text = comment.text.to_string();
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let (kind, specifier_in_quotes) =
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if text.starts_with("/ <reference path=") {
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(
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TsReferenceKind::Path,
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text.trim_start_matches("/ <reference path="),
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)
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} else if text.starts_with("/ <reference lib=") {
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(
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TsReferenceKind::Lib,
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text.trim_start_matches("/ <reference lib="),
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)
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} else if text.starts_with("/ <reference types=") {
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(
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TsReferenceKind::Types,
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text.trim_start_matches("/ <reference types="),
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)
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} else {
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continue;
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};
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let specifier = specifier_in_quotes
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.trim_end_matches("/>")
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.trim_end()
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.trim_start_matches('\"')
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.trim_start_matches('\'')
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.trim_end_matches('\"')
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.trim_end_matches('\'')
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.to_string();
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|
let location = parser.get_span_location(comment.span);
|
|
references.push(TsReferenceDescriptor {
|
|
kind,
|
|
specifier,
|
|
location: location.into(),
|
|
});
|
|
}
|
|
Ok((imports, references))
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn test_analyze_dependencies_and_directives() {
|
|
let source = r#"
|
|
// This comment is placed to make sure that directives are parsed
|
|
// even when they start on non-first line
|
|
|
|
/// <reference lib="dom" />
|
|
/// <reference types="./type_reference.d.ts" />
|
|
/// <reference path="./type_reference/dep.ts" />
|
|
// @deno-types="./type_definitions/foo.d.ts"
|
|
import { foo } from "./type_definitions/foo.js";
|
|
// @deno-types="./type_definitions/fizz.d.ts"
|
|
import "./type_definitions/fizz.js";
|
|
|
|
/// <reference path="./type_reference/dep2.ts" />
|
|
|
|
import * as qat from "./type_definitions/qat.ts";
|
|
|
|
console.log(foo);
|
|
console.log(fizz);
|
|
console.log(qat.qat);
|
|
"#;
|
|
|
|
let (imports, references) = analyze_dependencies_and_references(
|
|
"some/file.ts",
|
|
MediaType::TypeScript,
|
|
source,
|
|
true,
|
|
)
|
|
.expect("Failed to parse");
|
|
|
|
assert_eq!(
|
|
imports,
|
|
vec![
|
|
ImportDescriptor {
|
|
specifier: "./type_definitions/foo.js".to_string(),
|
|
deno_types: Some("./type_definitions/foo.d.ts".to_string()),
|
|
location: Location {
|
|
filename: "some/file.ts".to_string(),
|
|
line: 9,
|
|
col: 0,
|
|
},
|
|
},
|
|
ImportDescriptor {
|
|
specifier: "./type_definitions/fizz.js".to_string(),
|
|
deno_types: Some("./type_definitions/fizz.d.ts".to_string()),
|
|
location: Location {
|
|
filename: "some/file.ts".to_string(),
|
|
line: 11,
|
|
col: 0,
|
|
},
|
|
},
|
|
ImportDescriptor {
|
|
specifier: "./type_definitions/qat.ts".to_string(),
|
|
deno_types: None,
|
|
location: Location {
|
|
filename: "some/file.ts".to_string(),
|
|
line: 15,
|
|
col: 0,
|
|
},
|
|
},
|
|
]
|
|
);
|
|
|
|
// According to TS docs (https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html)
|
|
// directives that are not at the top of the file are ignored, so only
|
|
// 3 references should be captured instead of 4.
|
|
assert_eq!(
|
|
references,
|
|
vec![
|
|
TsReferenceDescriptor {
|
|
specifier: "dom".to_string(),
|
|
kind: TsReferenceKind::Lib,
|
|
location: Location {
|
|
filename: "some/file.ts".to_string(),
|
|
line: 5,
|
|
col: 0,
|
|
},
|
|
},
|
|
TsReferenceDescriptor {
|
|
specifier: "./type_reference.d.ts".to_string(),
|
|
kind: TsReferenceKind::Types,
|
|
location: Location {
|
|
filename: "some/file.ts".to_string(),
|
|
line: 6,
|
|
col: 0,
|
|
},
|
|
},
|
|
TsReferenceDescriptor {
|
|
specifier: "./type_reference/dep.ts".to_string(),
|
|
kind: TsReferenceKind::Path,
|
|
location: Location {
|
|
filename: "some/file.ts".to_string(),
|
|
line: 7,
|
|
col: 0,
|
|
},
|
|
},
|
|
]
|
|
);
|
|
}
|