Precompile immutable globally-installed pub executables.

sdk/lib/_internal/pub/lib/src/command/global_run.dart

Index: sdk/lib/_internal/pub/lib/src/command/global_run.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command/global_run.dart b/sdk/lib/_internal/pub/lib/src/command/global_run.dart
index d0f35ba70af58aaaf3b117f71c3343d1fc34ecc5..e9746ccdd2892c05f67eced168514641e751c498 100644
--- a/sdk/lib/_internal/pub/lib/src/command/global_run.dart
+++ b/sdk/lib/_internal/pub/lib/src/command/global_run.dart
@@ -6,8 +6,9 @@ library pub.command.global_run;
 
 import 'dart:async';
 
+import 'package:path/path.dart' as p;
+
 import '../command.dart';
-import '../executable.dart';
 import '../io.dart';
 import '../utils.dart';
 
@@ -37,10 +38,11 @@ class GlobalRunCommand extends PubCommand {
     }
 
     var args = commandOptions.rest.skip(1).toList();
+    if (p.split(executable).length > 1) {
+      usageError('Cannot run an executable in a subdirectory of a global '
+          'package.');
+    }
 
-    return globals.find(package).then((entrypoint) {
-      return runExecutable(this, entrypoint, package, executable, args,
-          isGlobal: true);
-    }).then(flushThenExit);
+    return globals.runExecutable(package, executable, args).then(flushThenExit);
   }
 }