keep old location of libraries.dart in the generated SDK (fixes 23755)

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1216313002.

pkg/analyzer/pubspec.yaml

@@ -4,7 +4,7 @@ author: Dart Team <misc@dartlang.org>
 description: Static analyzer for Dart.
 homepage: http://www.dartlang.org
 environment:
-  sdk: '>=1.8.0 <2.0.0'
+  sdk: '>=1.12.0-dev.1.0 <2.0.0'
 dependencies:
   args: '>=0.12.1 <0.14.0'
   html: ^0.12.0

tools/create_sdk.py

@@ -220,6 +220,17 @@ def Main():
              ignore=ignore_patterns('*.svn', 'doc', '*.py', '*.gypi', '*.sh',
                                     '.gitignore'))
 
+  # Copy libraries.dart to lib/_internal/libraries.dart for backwards
+  # compatibility.
+  #
+  # TODO(sigmund): stop copying libraries.dart. Old versions (<=0.25.1-alpha.4)
+  # of the analyzer package do not support the new location of this file. We
+  # should be able to remove the old file once we release a newer version of
+  # analyzer and popular frameworks have migrated to use it.
+  copyfile(join(HOME, 'sdk', 'lib', '_internal',
+                'sdk_library_metadata', 'lib', 'libraries.dart'),
+           join(LIB, '_internal', 'libraries.dart'))
+
   # Create and copy tools.
   UTIL = join(SDK_tmp, 'util')
   os.makedirs(UTIL)

utils/dartanalyzer/dartanalyzer.gyp

@@ -16,7 +16,7 @@
           'action_name': 'generate_dartanalyzer_snapshot',
           'inputs': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
-            '../../sdk/lib/_internal/libraries.dart',
+            '../../sdk/lib/_internal/sdk_library_metadata/lib/libraries.dart',
             '<(SHARED_INTERMEDIATE_DIR)/packages.stamp',
             '<!@(["python", "../../tools/list_files.py", "\\.dart$", "../../third_party/pkg/analyzer_cli"])',
           ],