build: add "include_js_files_for_snapshotting" Cargo feature (#17826)

This allows to not include source code into the binary (because
it will already be included in the V8 snapshot).

Nothing changes for the embedders - everything should still build the
same.

This commit brings the binary size from 87Mb to 82Mb on M1.

Alternative to https://github.com/denoland/deno/pull/17820 and
https://github.com/denoland/deno/pull/17653

---------

Co-authored-by: Leo Kettmeir <crowlkats@toaxl.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/core/modules.rs b/core/modules.rs
index 43dabf411..f1d4273e8 100644
--- a/core/modules.rs
+++ b/core/modules.rs
@@ -3,7 +3,6 @@
 use crate::bindings;
 use crate::error::generic_error;
 use crate::extensions::ExtensionFileSource;
-use crate::extensions::ExtensionFileSourceCode;
 use crate::module_specifier::ModuleSpecifier;
 use crate::resolve_import;
 use crate::resolve_url;
@@ -403,10 +402,9 @@ impl ModuleLoader for InternalModuleLoader {
       let result = if let Some(load_callback) = &self.maybe_load_callback {
         load_callback(file_source)
       } else {
-        match file_source.code {
-          ExtensionFileSourceCode::IncludedInBinary(code) => {
-            Ok(code.to_string())
-          }
+        match file_source.code.load() {
+          Ok(code) => Ok(code),
+          Err(err) => return futures::future::err(err).boxed_local(),
         }
       };