refactor: use ParsedModule and improve MediaTypes enum

cli/errors.rs

@@ -10,8 +10,8 @@
 //!   But Diagnostics are compile-time type errors, whereas JsErrors are runtime
 //!   exceptions.
 
+use crate::ast::DiagnosticBuffer;
 use crate::import_map::ImportMapError;
-use crate::swc_util::SwcDiagnosticBuffer;
 use deno_core::ErrBox;
 use deno_core::ModuleResolutionError;
 use rustyline::error::ReadlineError;
@@ -144,7 +144,7 @@ fn get_serde_json_error_class(
   }
 }
 
-fn get_swc_diagnostic_class(_: &SwcDiagnosticBuffer) -> &'static str {
+fn get_diagnostic_class(_: &DiagnosticBuffer) -> &'static str {
   "SyntaxError"
 }
 
@@ -211,8 +211,8 @@ pub(crate) fn get_error_class_name(e: &ErrBox) -> &'static str {
       .map(get_serde_json_error_class)
   })
   .or_else(|| {
-    e.downcast_ref::<SwcDiagnosticBuffer>()
-      .map(get_swc_diagnostic_class)
+    e.downcast_ref::<DiagnosticBuffer>()
+      .map(get_diagnostic_class)
   })
   .or_else(|| {
     e.downcast_ref::<url::ParseError>()

cli/file_fetcher.rs

@@ -552,23 +552,6 @@ impl SourceFileFetcher {
   }
 }
 
-pub fn map_file_extension(path: &Path) -> msg::MediaType {
-  match path.extension() {
-    None => msg::MediaType::Unknown,
-    Some(os_str) => match os_str.to_str() {
-      Some("ts") => msg::MediaType::TypeScript,
-      Some("tsx") => msg::MediaType::TSX,
-      Some("js") => msg::MediaType::JavaScript,
-      Some("jsx") => msg::MediaType::JSX,
-      Some("mjs") => msg::MediaType::JavaScript,
-      Some("cjs") => msg::MediaType::JavaScript,
-      Some("json") => msg::MediaType::Json,
-      Some("wasm") => msg::MediaType::Wasm,
-      _ => msg::MediaType::Unknown,
-    },
-  }
-}
-
 // convert a ContentType string into a enumerated MediaType + optional charset
 fn map_content_type(
   path: &Path,
@@ -600,7 +583,7 @@ fn map_content_type(
         "application/json" | "text/json" => msg::MediaType::Json,
         "application/wasm" => msg::MediaType::Wasm,
         // Handle plain and possibly webassembly
-        "text/plain" | "application/octet-stream" => map_file_extension(path),
+        "text/plain" | "application/octet-stream" => msg::MediaType::from(path),
         _ => {
           debug!("unknown content type: {}", content_type);
           msg::MediaType::Unknown
@@ -614,7 +597,7 @@ fn map_content_type(
 
       (media_type, charset)
     }
-    None => (map_file_extension(path), None),
+    None => (msg::MediaType::from(path), None),
   }
 }
 
@@ -1603,50 +1586,6 @@ mod tests {
     .await;
   }
 
-  #[test]
-  fn test_map_file_extension() {
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.ts")),
-      msg::MediaType::TypeScript
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.tsx")),
-      msg::MediaType::TSX
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.d.ts")),
-      msg::MediaType::TypeScript
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.js")),
-      msg::MediaType::JavaScript
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.jsx")),
-      msg::MediaType::JSX
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.json")),
-      msg::MediaType::Json
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.wasm")),
-      msg::MediaType::Wasm
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.cjs")),
-      msg::MediaType::JavaScript
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar.txt")),
-      msg::MediaType::Unknown
-    );
-    assert_eq!(
-      map_file_extension(Path::new("foo/bar")),
-      msg::MediaType::Unknown
-    );
-  }
-
   #[test]
   fn test_map_content_type_extension_only() {
     // Extension only

cli/global_state.rs

@@ -314,8 +314,8 @@ fn thread_safe() {
 
 #[test]
 fn test_should_allow_js() {
+  use crate::ast::Location;
   use crate::module_graph::ImportDescriptor;
-  use crate::swc_util::Location;
 
   assert!(should_allow_js(&[
     &ModuleGraphFile {

cli/info.rs

@@ -349,8 +349,8 @@ pub fn human_size(bytse: f64) -> String {
 #[cfg(test)]
 mod test {
   use super::*;
+  use crate::ast::Location;
   use crate::module_graph::ImportDescriptor;
-  use crate::swc_util::Location;
   use crate::MediaType;
 
   #[test]

cli/lint.rs

@@ -6,13 +6,12 @@
 //! At the moment it is only consumed using CLI but in
 //! the future it can be easily extended to provide
 //! the same functions as ops available in JS runtime.
+use crate::ast;
 use crate::colors;
-use crate::file_fetcher::map_file_extension;
 use crate::fmt::collect_files;
 use crate::fmt::run_parallelized;
 use crate::fmt_errors;
 use crate::msg;
-use crate::swc_util;
 use deno_core::ErrBox;
 use deno_lint::diagnostic::LintDiagnostic;
 use deno_lint::linter::Linter;
@@ -131,8 +130,8 @@ fn lint_file(
 ) -> Result<(Vec<LintDiagnostic>, String), ErrBox> {
   let file_name = file_path.to_string_lossy().to_string();
   let source_code = fs::read_to_string(&file_path)?;
-  let media_type = map_file_extension(&file_path);
-  let syntax = swc_util::get_syntax_for_media_type(media_type);
+  let media_type = msg::MediaType::from(&file_path);
+  let syntax = ast::get_syntax(&media_type);
 
   let lint_rules = rules::get_recommended_rules();
   let mut linter = create_linter(syntax, lint_rules);
@@ -158,7 +157,7 @@ fn lint_stdin(json: bool) -> Result<(), ErrBox> {
   };
   let mut reporter = create_reporter(reporter_kind);
   let lint_rules = rules::get_recommended_rules();
-  let syntax = swc_util::get_syntax_for_media_type(msg::MediaType::TypeScript);
+  let syntax = ast::get_syntax(&msg::MediaType::TypeScript);
   let mut linter = create_linter(syntax, lint_rules);
   let mut has_error = false;
   let pseudo_file_name = "_stdin.ts";

cli/main.rs

@@ -22,6 +22,7 @@ extern crate serde_derive;
 extern crate tokio;
 extern crate url;
 
+mod ast;
 mod checksum;
 pub mod colors;
 mod coverage;
@@ -59,7 +60,6 @@ pub mod resolve_addr;
 pub mod signal;
 pub mod source_maps;
 pub mod state;
-mod swc_util;
 mod test_runner;
 mod text_encoding;
 mod tokio_util;
@@ -72,7 +72,6 @@ pub mod worker;
 
 use crate::coverage::CoverageCollector;
 use crate::coverage::PrettyCoverageReporter;
-use crate::file_fetcher::map_file_extension;
 use crate::file_fetcher::SourceFile;
 use crate::file_fetcher::SourceFileFetcher;
 use crate::file_fetcher::TextDocument;
@@ -376,20 +375,16 @@ async fn doc_command(
   let doc_parser = doc::DocParser::new(loader, private);
 
   let parse_result = if source_file == "--builtin" {
-    let syntax = swc_util::get_syntax_for_dts();
+    let syntax = ast::get_syntax(&msg::MediaType::Dts);
     doc_parser.parse_source(
       "lib.deno.d.ts",
       syntax,
       get_types(flags.unstable).as_str(),
     )
   } else {
     let path = PathBuf::from(&source_file);
-    let syntax = if path.ends_with("d.ts") {
-      swc_util::get_syntax_for_dts()
-    } else {
-      let media_type = map_file_extension(&path);
-      swc_util::get_syntax_for_media_type(media_type)
-    };
+    let media_type = MediaType::from(&path);
+    let syntax = ast::get_syntax(&media_type);
     let module_specifier =
       ModuleSpecifier::resolve_url_or_path(&source_file).unwrap();
     doc_parser

cli/module_graph.rs

@@ -1,13 +1,12 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
+use crate::ast::Location;
 use crate::checksum;
-use crate::file_fetcher::map_file_extension;
 use crate::file_fetcher::SourceFile;
 use crate::file_fetcher::SourceFileFetcher;
 use crate::import_map::ImportMap;
 use crate::msg::MediaType;
 use crate::permissions::Permissions;
-use crate::swc_util::Location;
 use crate::tsc::pre_process_file;
 use crate::tsc::ImportDesc;
 use crate::tsc::TsReferenceDesc;
@@ -24,7 +23,6 @@ use serde::Serialize;
 use serde::Serializer;
 use std::collections::HashMap;
 use std::collections::HashSet;
-use std::path::PathBuf;
 use std::pin::Pin;
 
 // TODO(bartlomieju): it'd be great if this function returned
@@ -348,7 +346,7 @@ impl ModuleGraphLoader {
 
     let (raw_imports, raw_references) = pre_process_file(
       &module_specifier.to_string(),
-      map_file_extension(&PathBuf::from(&specifier)),
+      MediaType::from(&specifier),
       &source_code,
       self.analyze_dynamic_imports,
     )?;
@@ -380,7 +378,7 @@ impl ModuleGraphLoader {
         url: specifier.to_string(),
         redirect: None,
         version_hash: "".to_string(),
-        media_type: map_file_extension(&PathBuf::from(specifier.clone())),
+        media_type: MediaType::from(&specifier),
         filename: specifier,
         source_code,
         imports,
@@ -931,14 +929,16 @@ console.log(qat.qat);
   // 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.
+  let file_specifier =
+    ModuleSpecifier::resolve_url_or_path("some/file.ts").unwrap();
   assert_eq!(
     references,
     vec![
       TsReferenceDesc {
         specifier: "dom".to_string(),
         kind: TsReferenceKind::Lib,
         location: Location {
-          filename: "some/file.ts".to_string(),
+          filename: file_specifier.to_string(),
           line: 5,
           col: 0,
         },
@@ -947,7 +947,7 @@ console.log(qat.qat);
         specifier: "./type_reference.d.ts".to_string(),
         kind: TsReferenceKind::Types,
         location: Location {
-          filename: "some/file.ts".to_string(),
+          filename: file_specifier.to_string(),
           line: 6,
           col: 0,
         },
@@ -956,7 +956,7 @@ console.log(qat.qat);
         specifier: "./type_reference/dep.ts".to_string(),
         kind: TsReferenceKind::Path,
         location: Location {
-          filename: "some/file.ts".to_string(),
+          filename: file_specifier.to_string(),
           line: 7,
           col: 0,
         },