core: introduce extensions (#9800)

Extensions allow declarative extensions to "JsRuntime" (ops, state, JS or middleware).

This allows for:
- `op_crates` to be plug-and-play & self-contained, reducing complexity leaked to consumers
- op middleware (like metrics_op) to be opt-in and for new middleware (unstable, tracing,...)
- `MainWorker` and `WebWorker` to be composable, allowing users to extend workers with their ops whilst benefiting from the other infrastructure (inspector, etc...)

In short extensions improve deno's modularity, reducing complexity and leaky abstractions for embedders and the internal codebase.

1 files changed, 31 insertions, 16 deletions

diff --git a/op_crates/file/lib.rs b/op_crates/file/lib.rs
index ea519046f..19bb8b19b 100644
--- a/op_crates/file/lib.rs
+++ b/op_crates/file/lib.rs
@@ -2,8 +2,10 @@
 
 use deno_core::error::null_opbuf;
 use deno_core::error::AnyError;
+use deno_core::include_js_files;
+use deno_core::op_sync;
 use deno_core::url::Url;
-use deno_core::JsRuntime;
+use deno_core::Extension;
 use deno_core::ModuleSpecifier;
 use deno_core::ZeroCopyBuf;
 use std::collections::HashMap;
@@ -82,22 +84,35 @@ pub fn op_file_revoke_object_url(
   Ok(())
 }
 
-/// Load and execute the javascript code.
-pub fn init(isolate: &mut JsRuntime) {
-  let files = vec![
-    ("deno:op_crates/file/01_file.js", include_str!("01_file.js")),
-    (
-      "deno:op_crates/file/02_filereader.js",
-      include_str!("02_filereader.js"),
+pub fn init(
+  blob_url_store: BlobUrlStore,
+  maybe_location: Option<Url>,
+) -> Extension {
+  Extension::with_ops(
+    include_js_files!(
+      prefix "deno:op_crates/file",
+      "01_file.js",
+      "02_filereader.js",
+      "03_blob_url.js",
     ),
-    (
-      "deno:op_crates/file/03_blob_url.js",
-      include_str!("03_blob_url.js"),
-    ),
-  ];
-  for (url, source_code) in files {
-    isolate.execute(url, source_code).unwrap();
-  }
+    vec![
+      (
+        "op_file_create_object_url",
+        op_sync(op_file_create_object_url),
+      ),
+      (
+        "op_file_revoke_object_url",
+        op_sync(op_file_revoke_object_url),
+      ),
+    ],
+    Some(Box::new(move |state| {
+      state.put(blob_url_store.clone());
+      if let Some(location) = maybe_location.clone() {
+        state.put(Location(location));
+      }
+      Ok(())
+    })),
+  )
 }
 
 pub fn get_declaration() -> PathBuf {