feat(cli/doc): Support doc for runtime built-ins (#4635)

1 files changed, 22 insertions, 12 deletions

diff --git a/cli/lib.rs b/cli/lib.rs
index a87846c11..79fe312a1 100644
--- a/cli/lib.rs
+++ b/cli/lib.rs
@@ -251,6 +251,15 @@ async fn print_file_info(
   Ok(())
 }
 
+fn get_types() -> String {
+  format!(
+    "{}\n{}\n{}",
+    crate::js::DENO_NS_LIB,
+    crate::js::SHARED_GLOBALS_LIB,
+    crate::js::WINDOW_LIB
+  )
+}
+
 async fn info_command(
   flags: Flags,
   file: Option<String>,
@@ -369,13 +378,12 @@ async fn bundle_command(
 
 async fn doc_command(
   flags: Flags,
-  source_file: String,
+  source_file: Option<String>,
   json: bool,
   maybe_filter: Option<String>,
 ) -> Result<(), ErrBox> {
   let global_state = GlobalState::new(flags.clone())?;
-  let module_specifier =
-    ModuleSpecifier::resolve_url_or_path(&source_file).unwrap();
+  let source_file = source_file.unwrap_or_else(|| "--builtin".to_string());
 
   impl DocFileLoader for SourceFileFetcher {
     fn load_source_code(
@@ -397,9 +405,16 @@ async fn doc_command(
 
   let loader = Box::new(global_state.file_fetcher.clone());
   let doc_parser = doc::DocParser::new(loader);
-  let parse_result = doc_parser
-    .parse_with_reexports(&module_specifier.to_string())
-    .await;
+
+  let parse_result = if source_file == "--builtin" {
+    doc_parser.parse_source("lib.deno.d.ts", get_types().as_str())
+  } else {
+    let module_specifier =
+      ModuleSpecifier::resolve_url_or_path(&source_file).unwrap();
+    doc_parser
+      .parse_with_reexports(&module_specifier.to_string())
+      .await
+  };
 
   let doc_nodes = match parse_result {
     Ok(nodes) => nodes,
@@ -580,12 +595,7 @@ pub fn main() {
       return;
     }
     DenoSubcommand::Types => {
-      let types = format!(
-        "{}\n{}\n{}",
-        crate::js::DENO_NS_LIB,
-        crate::js::SHARED_GLOBALS_LIB,
-        crate::js::WINDOW_LIB
-      );
+      let types = get_types();
       if let Err(e) = write_to_stdout_ignore_sigpipe(types.as_bytes()) {
         eprintln!("{}", e);
         std::process::exit(1);