app: add support for inspect/inspect-brk in forked node process

atom/app/node_main.cc

@@ -6,6 +6,7 @@
 
 #include "atom/app/uv_task_runner.h"
 #include "atom/browser/javascript_environment.h"
+#include "atom/browser/node_debugger.h"
 #include "atom/common/api/atom_bindings.h"
 #include "atom/common/crash_reporter/crash_reporter.h"
 #include "atom/common/native_mate_converters/string16_converter.h"
@@ -50,6 +51,10 @@ int NodeMain(int argc, char *argv[]) {
         &isolate_data, gin_env.context(), argc, argv,
         exec_argc, exec_argv);
 
+    // Enable support for v8 inspector.
+    NodeDebugger node_debugger(env);
+    node_debugger.Start();
+
     mate::Dictionary process(gin_env.isolate(), env->process_object());
 #if defined(OS_WIN)
     process.SetMethod("log", &AtomBindings::Log);

atom/browser/node_debugger.cc

@@ -9,6 +9,8 @@
 #include "libplatform/libplatform.h"
 #include "native_mate/dictionary.h"
 
+#include "atom/common/node_includes.h"
+
 namespace atom {
 
 NodeDebugger::NodeDebugger(node::Environment* env) : env_(env) {

atom/browser/node_debugger.h

@@ -7,7 +7,15 @@
 
 #include <memory>
 
-#include "atom/common/node_includes.h"
+#include "base/macros.h"
+
+namespace node {
+class Environment;
+}
+
+namespace v8 {
+class Platform;
+}
 
 namespace atom {
 

spec/node-spec.js

@@ -104,8 +104,16 @@ describe('node feature', function () {
     })
 
     describe('child_process.spawn', function () {
+      let child
+
+      afterEach(function () {
+        if (child != null) {
+          child.kill()
+        }
+      })
+
       it('supports spawning Electron as a node process via the ELECTRON_RUN_AS_NODE env var', function (done) {
-        const child = ChildProcess.spawn(process.execPath, [path.join(__dirname, 'fixtures', 'module', 'run-as-node.js')], {
+        child = ChildProcess.spawn(process.execPath, [path.join(__dirname, 'fixtures', 'module', 'run-as-node.js')], {
           env: {
             ELECTRON_RUN_AS_NODE: true
           }
@@ -124,6 +132,27 @@ describe('node feature', function () {
           done()
         })
       })
+
+      it('supports starting the v8 inspector with --inspect/--inspect-brk', function (done) {
+        child = ChildProcess.spawn(process.execPath, ['--inspect-brk', path.join(__dirname, 'fixtures', 'module', 'run-as-node.js')], {
+          env: {
+            ELECTRON_RUN_AS_NODE: true
+          }
+        })
+
+        let output = ''
+        child.stderr.on('data', function (data) {
+          output += data
+
+          if (output.trim().startsWith('Debugger listening on port')) {
+            done()
+          }
+        })
+
+        child.stdout.on('data', function (data) {
+          done(new Error(`Unexpected output: ${data.toString()}`))
+        })
+      })
     })
   })