Generate docgen output along with api_docs as part of the build

utils/apidoc/docgen.gyp

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables' : {
     'script_suffix%': '',
   },
   'conditions' : [
     ['OS=="win"', {
       'variables' : {
         'script_suffix': '.bat',
       },
     }],
   ],
   'targets': [
     {
-      'target_name': 'api_docs',
+      'target_name': 'docgen',
       'type': 'none',
       'dependencies': [
         '../../utils/compiler/compiler.gyp:dart2js',
         '../../runtime/dart-runtime.gyp:dart',
         '../../pkg/pkg.gyp:pkg_packages',
+        'apidoc.gyp:api_docs',
       ],
       'includes': [
         '../../sdk/lib/core/corelib_sources.gypi',
       ],
       'actions': [
         {
-          'action_name': 'run_apidoc',
+          'action_name': 'run_docgen',
           # The 'inputs' list records the files whose timestamps are
           # compared to the files listed in 'outputs'.  If a file
           # 'outputs' doesn't exist or if a file in 'inputs' is newer
           # than a file in 'outputs', this action is executed.  Notice
           # that the dependencies listed above has nothing to do with
           # when this action is executed.  You must list a file in
           # 'inputs' to make sure that it exists before the action is
           # executed, or to make sure this action is re-run.
           #
           # We want to build the platform documentation whenever
           # dartdoc, apidoc, or its dependency changes.  This prevents
           # people from accidentally breaking apidoc when making
           # changes to the platform libraries and or when modifying
           # dart2js or the VM.
           #
           # In addition, we want to make sure that the platform
           # documentation is regenerated when the platform sources
           # changes.
           #
           # So we want this action to be re-run when a dart file
           # changes in this directory, or in the SDK library (we may
           # no longer need to list the files in ../../runtime/lib and
           # ../../runtime/bin, as most of them has moved to
           # ../../sdk/lib).
           #
-          # In addition, we want to make sure the documentation is
-          # regenerated when a resource file (CSS, PNG, etc) is
-          # updated.  This is because these files are also copied to
-          # the output directory.
           'inputs': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
             '<(SHARED_INTERMEDIATE_DIR)/utils_wrapper.dart.snapshot',
             '<!@(["python", "../../tools/list_files.py", "\\.(css|ico|js|json|png|sh|txt|yaml|py)$", ".", "../../sdk/lib/_internal/dartdoc"])',
             '<!@(["python", "../../tools/list_files.py", "\\.dart$", ".", "../../sdk/lib", "../../runtime/lib", "../../runtime/bin"])',
             '../../sdk/bin/dart',
             '../../sdk/bin/dart.bat',
             '../../sdk/bin/dart2js',
             '../../sdk/bin/dart2js.bat',
             '../../tools/only_in_release_mode.py',
+            # We sit inside the api_docs directory, so make sure it has run
+            # before we do. Otherwise it might run later and delete us.
+            '<(PRODUCT_DIR)/api_docs/index.html',
           ],
           'outputs': [
-            '<(PRODUCT_DIR)/api_docs/index.html',
-            '<(PRODUCT_DIR)/api_docs/client-static.js',
+            '<(PRODUCT_DIR)/api_docs/docgen/index.json',
           ],
           'action': [
             'python',
             '../../tools/only_in_release_mode.py',
             '<@(_outputs)',
             '--',
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
+            '--old_gen_heap_size=1024',
             '--package-root=<(PRODUCT_DIR)/packages/',
-            'apidoc.dart',
-            '--out=<(PRODUCT_DIR)/api_docs',
-            '--version=<!@(["python", "../../tools/print_version.py"])',
+            '../../pkg/docgen/bin/docgen.dart',
+            '--out=<(PRODUCT_DIR)/api_docs/docgen',
+            '--json',
+            '--include-sdk',
             '--package-root=<(PRODUCT_DIR)/packages',
-            '--mode=static',
-            '--exclude-lib=analyzer',
             '--exclude-lib=async_helper',
-            '--exclude-lib=barback',
-            '--exclude-lib=browser',
-            '--exclude-lib=dartdoc',
+            '--exclude-lib=expect',
             '--exclude-lib=docgen',
-            '--exclude-lib=expect',
-            '--exclude-lib=http',
-            '--exclude-lib=oauth2',
-            '--exclude-lib=scheduled_test',
-            '--exclude-lib=stack_trace',
-            '--exclude-lib=watcher',
-            '--exclude-lib=webdriver',
-            '--exclude-lib=yaml',
-            '--include-lib=matcher',
-            '--extra-lib=pkg/unittest/lib/mock.dart',
+            '../../pkg',          
           ],
-          'message': 'Running apidoc: <(_action)',
+          'message': 'Running docgen: <(_action)',
         },
       ],
     }
   ],
 }