src: put bootstrappers in lib/internal/bootstrap/

Create `lib/internal/bootstrap/` and put bootstrappers there:

Before:

```
lib/internal
├── ...
├── bootstrap_loaders.js
└── bootstrap_node.js
```

After:

```
lib/internal
├── ...
└── bootstrap
    ├── loaders.js
    └── node.js
```

Backport-PR-URL: #19374
PR-URL: #19177
Refs: #19112
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

lib/domain.js

@@ -30,7 +30,7 @@ const util = require('util');
 const EventEmitter = require('events');
 const errors = require('internal/errors');
 const { createHook } = require('async_hooks');
-const { internalBinding } = require('internal/bootstrap_loaders');
+const { internalBinding } = require('internal/bootstrap/loaders');
 
 // overwrite process.domain with a getter/setter that will allow for more
 // effective optimizations

lib/internal/bootstrap_loaders.js → lib/internal/bootstrap/loaders.js

@@ -2,7 +2,7 @@
 // modules. In contrast, user land modules are loaded using
 // lib/module.js (CommonJS Modules) or lib/internal/loader/* (ES Modules).
 //
-// This file is compiled and run by node.cc before bootstrap_node.js
+// This file is compiled and run by node.cc before bootstrap/node.js
 // was called, therefore the loaders are bootstraped before we start to
 // actually bootstrap Node.js. It creates the following objects:
 //
@@ -29,7 +29,7 @@
 //   so they can be loaded faster without the cost of I/O. This class makes the
 //   lib/internal/*, deps/internal/* modules and internalBinding() available by
 //   default to core modules, and lets the core modules require itself via
-//   require('internal/bootstrap_loaders') even when this file is not written in
+//   require('internal/bootstrap/loaders') even when this file is not written in
 //   CommonJS style.
 //
 // Other objects:
@@ -111,7 +111,7 @@
   // Think of this as module.exports in this file even though it is not
   // written in CommonJS style.
   const loaderExports = { internalBinding, NativeModule };
-  const loaderId = 'internal/bootstrap_loaders';
+  const loaderId = 'internal/bootstrap/loaders';
   NativeModule.require = function(id) {
     if (id === loaderId) {
       return loaderExports;
@@ -211,6 +211,6 @@
   };
 
   // This will be passed to the bootstrapNodeJSCore function in
-  // bootstrap_node.js.
+  // bootstrap/node.js.
   return loaderExports;
 });

lib/internal/bootstrap_node.js → lib/internal/bootstrap/node.js

@@ -5,7 +5,7 @@
 // to the performance of the startup process, many dependencies are invoked
 // lazily.
 //
-// Before this file is run, lib/internal/bootstrap_loaders.js gets run first
+// Before this file is run, lib/internal/bootstrap/loaders.js gets run first
 // to bootstrap the internal binding and module loaders, including
 // process.binding(), process._linkedBinding(), internalBinding() and
 // NativeModule. And then { internalBinding, NativeModule } will be passed

lib/internal/loader/CreateDynamicModule.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { internalBinding } = require('internal/bootstrap_loaders');
+const { internalBinding } = require('internal/bootstrap/loaders');
 const { ModuleWrap } = internalBinding('module_wrap');
 const debug = require('util').debuglog('esm');
 const ArrayJoin = Function.call.bind(Array.prototype.join);

lib/internal/loader/DefaultResolve.js

@@ -3,7 +3,7 @@
 const { URL } = require('url');
 const CJSmodule = require('module');
 const internalFS = require('internal/fs');
-const { NativeModule, internalBinding } = require('internal/bootstrap_loaders');
+const { NativeModule, internalBinding } = require('internal/bootstrap/loaders');
 const { extname } = require('path');
 const { realpathSync } = require('fs');
 const preserveSymlinks = !!process.binding('config').preserveSymlinks;

lib/internal/loader/ModuleJob.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { internalBinding } = require('internal/bootstrap_loaders');
+const { internalBinding } = require('internal/bootstrap/loaders');
 const { ModuleWrap } = internalBinding('module_wrap');
 const { SafeSet, SafePromise } = require('internal/safe_globals');
 const { decorateErrorStack } = require('internal/util');

lib/internal/loader/ModuleWrap.js

@@ -2,5 +2,5 @@
 
 // exposes ModuleWrap for testing
 
-const { internalBinding } = require('internal/bootstrap_loaders');
+const { internalBinding } = require('internal/bootstrap/loaders');
 module.exports = internalBinding('module_wrap').ModuleWrap;

lib/internal/loader/Translators.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { NativeModule, internalBinding } = require('internal/bootstrap_loaders');
+const { NativeModule, internalBinding } = require('internal/bootstrap/loaders');
 const { ModuleWrap } = internalBinding('module_wrap');
 const internalCJSModule = require('internal/module');
 const CJSModule = require('module');

lib/internal/process/modules.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { internalBinding } = require('internal/bootstrap_loaders');
+const { internalBinding } = require('internal/bootstrap/loaders');
 const {
   setImportModuleDynamicallyCallback
 } = internalBinding('module_wrap');

lib/internal/vm/Module.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { internalBinding } = require('internal/bootstrap_loaders');
+const { internalBinding } = require('internal/bootstrap/loaders');
 const { emitExperimentalWarning } = require('internal/util');
 const { URL } = require('internal/url');
 const { kParsingContext, isContext } = process.binding('contextify');

lib/module.js

@@ -21,7 +21,7 @@
 
 'use strict';
 
-const { NativeModule } = require('internal/bootstrap_loaders');
+const { NativeModule } = require('internal/bootstrap/loaders');
 const util = require('util');
 const { decorateErrorStack } = require('internal/util');
 const { getURLFromFilePath } = require('internal/url');

node.gyp

@@ -25,8 +25,8 @@
     'node_lib_target_name%': 'node_lib',
     'node_intermediate_lib_type%': 'static_library',
     'library_files': [
-      'lib/internal/bootstrap_loaders.js',
-      'lib/internal/bootstrap_node.js',
+      'lib/internal/bootstrap/loaders.js',
+      'lib/internal/bootstrap/node.js',
       'lib/async_hooks.js',
       'lib/assert.js',
       'lib/buffer.js',

src/node.cc

@@ -250,7 +250,7 @@ bool config_experimental_vm_modules = false;
 
 // Set in node.cc by ParseArgs when --loader is used.
 // Used in node_config.cc to set a constant on process.binding('config')
-// that is used by lib/internal/bootstrap_node.js
+// that is used by lib/internal/bootstrap/node.js
 std::string config_userland_loader;  // NOLINT(runtime/string)
 
 // Set by ParseArgs when --pending-deprecation or NODE_PENDING_DEPRECATION
@@ -263,7 +263,7 @@ std::string config_warning_file;  // NOLINT(runtime/string)
 // Set in node.cc by ParseArgs when --expose-internals or --expose_internals is
 // used.
 // Used in node_config.cc to set a constant on process.binding('config')
-// that is used by lib/internal/bootstrap_node.js
+// that is used by lib/internal/bootstrap/node.js
 bool config_expose_internals = false;
 
 bool v8_initialized = false;
@@ -3645,23 +3645,23 @@ static Local<Function> GetBootstrapper(Environment* env, Local<String> source,
   // are not safe to ignore.
   try_catch.SetVerbose(false);
 
-  // Execute the factory javascript file
-  Local<Value> factory_v = ExecuteString(env, source, script_name);
+  // Execute the bootstrapper javascript file
+  Local<Value> bootstrapper_v = ExecuteString(env, source, script_name);
   if (try_catch.HasCaught())  {
     ReportException(env, try_catch);
     exit(10);
   }
 
-  CHECK(factory_v->IsFunction());
-  Local<Function> factory = Local<Function>::Cast(factory_v);
+  CHECK(bootstrapper_v->IsFunction());
+  Local<Function> bootstrapper = Local<Function>::Cast(bootstrapper_v);
 
-  return scope.Escape(factory);
+  return scope.Escape(bootstrapper);
 }
 
-static bool ExecuteBootstrapper(Environment* env, Local<Function> factory,
+static bool ExecuteBootstrapper(Environment* env, Local<Function> bootstrapper,
                                 int argc, Local<Value> argv[],
                                 Local<Value>* out) {
-  bool ret = factory->Call(
+  bool ret = bootstrapper->Call(
       env->context(), Null(env->isolate()), argc, argv).ToLocal(out);
 
   // If there was an error during bootstrap then it was either handled by the
@@ -3688,16 +3688,18 @@ void LoadEnvironment(Environment* env) {
   // are not safe to ignore.
   try_catch.SetVerbose(false);
 
-  // The factory scripts are lib/internal/bootstrap_loaders.js and
-  // lib/internal/bootstrap_node.js, each included as a static C string
+  // The bootstrapper scripts are lib/internal/bootstrap/loaders.js and
+  // lib/internal/bootstrap/node.js, each included as a static C string
   // defined in node_javascript.h, generated in node_javascript.cc by
   // node_js2c.
+  Local<String> loaders_name =
+      FIXED_ONE_BYTE_STRING(env->isolate(), "internal/bootstrap/loaders.js");
   Local<Function> loaders_bootstrapper =
-      GetBootstrapper(env, LoadersBootstrapperSource(env),
-                 FIXED_ONE_BYTE_STRING(env->isolate(), "bootstrap_loaders.js"));
+      GetBootstrapper(env, LoadersBootstrapperSource(env), loaders_name);
+  Local<String> node_name =
+      FIXED_ONE_BYTE_STRING(env->isolate(), "internal/bootstrap/node.js");
   Local<Function> node_bootstrapper =
-      GetBootstrapper(env, NodeBootstrapperSource(env),
-                 FIXED_ONE_BYTE_STRING(env->isolate(), "bootstrap_node.js"));
+      GetBootstrapper(env, NodeBootstrapperSource(env), node_name);
 
   // Add a reference to the global object
   Local<Object> global = env->context()->Global();

src/node_internals.h

@@ -180,13 +180,13 @@ extern bool config_experimental_vm_modules;
 
 // Set in node.cc by ParseArgs when --loader is used.
 // Used in node_config.cc to set a constant on process.binding('config')
-// that is used by lib/internal/bootstrap_node.js
+// that is used by lib/internal/bootstrap/node.js
 extern std::string config_userland_loader;
 
 // Set in node.cc by ParseArgs when --expose-internals or --expose_internals is
 // used.
 // Used in node_config.cc to set a constant on process.binding('config')
-// that is used by lib/internal/bootstrap_node.js
+// that is used by lib/internal/bootstrap/node.js
 extern bool config_expose_internals;
 
 // Set in node.cc by ParseArgs when --redirect-warnings= is used.

src/node_url.cc

@@ -2311,7 +2311,7 @@ const Local<Value> URL::ToObject(Environment* env) const {
     // The SetURLConstructor method must have been called already to
     // set the constructor function used below. SetURLConstructor is
     // called automatically when the internal/url.js module is loaded
-    // during the internal/bootstrap_node.js processing.
+    // during the internal/bootstrap/node.js processing.
     ret = env->url_constructor_function()
         ->Call(env->context(), undef, arraysize(argv), argv);
   }

test/message/core_line_numbers.out

@@ -12,4 +12,4 @@ RangeError: Invalid input
     at tryModuleLoad (module.js:*:*)
     at Function.Module._load (module.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)

test/message/error_exit.out

@@ -11,5 +11,5 @@ AssertionError [ERR_ASSERTION]: 1 === 2
     at tryModuleLoad (module.js:*:*)
     at Function.Module._load (module.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/eval_messages.out

@@ -8,9 +8,9 @@ SyntaxError: Strict mode code may not include a with statement
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 42
 42
 [eval]:1
@@ -23,9 +23,9 @@ Error: hello
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 
 [eval]:1
 throw new Error("hello")
@@ -37,9 +37,9 @@ Error: hello
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 100
 [eval]:1
 var x = 100; y = x;
@@ -51,9 +51,9 @@ ReferenceError: y is not defined
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 
 [eval]:1
 var ______________________________________________; throw 10

test/message/events_unhandled_error_common_trace.out

@@ -12,11 +12,11 @@ Error: foo:bar
     at tryModuleLoad (module.js:*:*)
     at Function.Module._load (module.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
 Emitted 'error' event at:
     at quux (*events_unhandled_error_common_trace.js:*:*)
     at Object.<anonymous> (*events_unhandled_error_common_trace.js:*:*)
     at Module._compile (module.js:*:*)
     [... lines matching original stack trace ...]
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/events_unhandled_error_nexttick.out

@@ -10,11 +10,11 @@ Error
     at tryModuleLoad (module.js:*:*)
     at Function.Module._load (module.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 Emitted 'error' event at:
     at process.nextTick (*events_unhandled_error_nexttick.js:*:*)
     at process._tickCallback (internal/process/next_tick.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/events_unhandled_error_sameline.out

@@ -10,10 +10,10 @@ Error
     at tryModuleLoad (module.js:*:*)
     at Function.Module._load (module.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 Emitted 'error' event at:
     at Object.<anonymous> (*events_unhandled_error_sameline.js:*:*)
     at Module._compile (module.js:*:*)
     [... lines matching original stack trace ...]
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/nexttick_throw.out

@@ -6,5 +6,5 @@ ReferenceError: undefined_reference_error_maker is not defined
     at *test*message*nexttick_throw.js:*:*
     at process._tickCallback (internal/process/next_tick.js:*:*)
     at Function.Module.runMain (module.js:*:*)
-    at startup (bootstrap_node.js:*:*)
-    at bootstrapNodeJSCore (bootstrap_node.js:*:*)
+    at startup (internal/bootstrap/node.js:*:*)
+    at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/stdin_messages.out

@@ -8,8 +8,8 @@ SyntaxError: Strict mode code may not include a with statement
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at Socket.<anonymous> (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
     at endReadableNT (_stream_readable.js:*:*)
     at process._tickCallback (internal/process/next_tick.js:*:*)
@@ -25,8 +25,8 @@ Error: hello
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at Socket.<anonymous> (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
     at endReadableNT (_stream_readable.js:*:*)
     at process._tickCallback (internal/process/next_tick.js:*:*)
@@ -40,8 +40,8 @@ Error: hello
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at Socket.<anonymous> (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
     at endReadableNT (_stream_readable.js:*:*)
     at process._tickCallback (internal/process/next_tick.js:*:*)
@@ -56,8 +56,8 @@ ReferenceError: y is not defined
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
     at Module._compile (module.js:*:*)
-    at evalScript (bootstrap_node.js:*:*)
-    at Socket.<anonymous> (bootstrap_node.js:*:*)
+    at evalScript (internal/bootstrap/node.js:*:*)
+    at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
     at endReadableNT (_stream_readable.js:*:*)
     at process._tickCallback (internal/process/next_tick.js:*:*)