Revert of Android: Support Android Studio 2.3

build/android/gradle/generate_gradle.py

Index: build/android/gradle/generate_gradle.py
diff --git a/build/android/gradle/generate_gradle.py b/build/android/gradle/generate_gradle.py
index c4e86655c1536f5bdc82e097329d4421012ee22c..ec50a247b376407ccba490952bc00b4acc82fa8e 100755
--- a/build/android/gradle/generate_gradle.py
+++ b/build/android/gradle/generate_gradle.py
@@ -7,6 +7,7 @@
 
 import argparse
 import codecs
+import glob
 import logging
 import os
 import re
@@ -258,9 +259,9 @@
     java_files = []
     for entry in self._GetEntries(root_entry):
       java_files += entry.JavaFiles()
-    java_dirs, single_files = _ComputeJavaSourceDirsAndFiles(
+    java_dirs, excludes = _ComputeJavaSourceDirsAndExcludes(
         constants.GetOutDirectory(), java_files)
-    return java_dirs, single_files
+    return java_dirs, excludes
 
   def _GenCustomManifest(self, entry):
     """Returns the path to the generated AndroidManifest.xml.
@@ -332,11 +333,11 @@
     # TODO(agrieve): Add an option to use interface jars and see if that speeds
     # things up at all.
     variables = {}
-    java_dirs, java_files = self._GenJavaDirs(root_entry)
+    java_dirs, excludes = self._GenJavaDirs(root_entry)
     java_dirs.sort()
     variables['java_dirs'] = self._Relativize(root_entry, java_dirs)
     variables['java_dirs'].append(_SRCJARS_SUBDIR)
-    variables['java_files'] = self._Relativize(root_entry, java_files)
+    variables['java_excludes'] = excludes
     variables['jni_libs'] = self._Relativize(
         root_entry, set(self._GenJniLibs(root_entry)))
     variables['prebuilts'] = [
@@ -387,18 +388,42 @@
   return found_roots
 
 
-def _ComputeJavaSourceDirsAndFiles(output_dir, java_files):
-  """Computes the list of java source directories and single files.
+def _ComputeExcludeFilters(wanted_files, unwanted_files, parent_dir):
+  """Returns exclude patters to exclude unwanted files but keep wanted files.
+
+  - Shortens exclude list by globbing if possible.
+  - Exclude patterns are relative paths from the parent directory.
+  """
+  excludes = []
+  files_to_include = set(wanted_files)
+  files_to_exclude = set(unwanted_files)
+  while files_to_exclude:
+    unwanted_file = files_to_exclude.pop()
+    target_exclude = os.path.join(
+        os.path.dirname(unwanted_file), '*.java')
+    found_files = set(glob.glob(target_exclude))
+    valid_files = found_files & files_to_include
+    if valid_files:
+      excludes.append(os.path.relpath(unwanted_file, parent_dir))
+    else:
+      excludes.append(os.path.relpath(target_exclude, parent_dir))
+      files_to_exclude -= found_files
+  return excludes
+
+
+def _ComputeJavaSourceDirsAndExcludes(output_dir, java_files):
+  """Computes the list of java source directories and exclude patterns.
 
   1. Computes the root java source directories from the list of files.
-  2. Compute single files that are not included in full directories.
-  3. Returns the list of java source directories and single files.
+  2. Compute exclude patterns that exclude all extra files only.
+  3. Returns the list of java source directories and exclude patterns.
   """
   java_dirs = []
-  single_files = set()
+  excludes = []
   if java_files:
     java_files = _RebasePath(java_files)
     computed_dirs = _ComputeJavaSourceDirs(java_files)
+    java_dirs = computed_dirs.keys()
     all_found_java_files = set()
 
     for directory, files in computed_dirs.iteritems():
@@ -406,20 +431,19 @@
       all_found_java_files.update(found_java_files)
       unwanted_java_files = set(found_java_files) - set(files)
       if unwanted_java_files:
-        logging.debug('Directory requires single files: %s', directory)
-        single_files.update(files)
-      else:
-        java_dirs.append(directory)
+        logging.debug('Directory requires excludes: %s', directory)
+        excludes.extend(
+            _ComputeExcludeFilters(files, unwanted_java_files, directory))
 
     missing_java_files = set(java_files) - all_found_java_files
     # Warn only about non-generated files that are missing.
     missing_java_files = [p for p in missing_java_files
                           if not p.startswith(output_dir)]
     if missing_java_files:
-      logging.error(
+      logging.warning(
           'Some java files were not found: %s', missing_java_files)
 
-  return java_dirs, list(single_files)
+  return java_dirs, excludes
 
 
 def _CreateRelativeSymlink(target_path, link_path):
@@ -495,8 +519,6 @@
       _RebasePath(os.path.join(build_vars['android_sdk_build_tools'],
                                'source.properties')))
   variables['build_tools_version'] = source_properties['Pkg.Revision']
-  # TODO(wnwen): Remove this line once http://crbug.com/688263 is fixed.
-  variables['build_tools_version'] = '25.0.0'
   variables['compile_sdk_version'] = (
       'android-%s' % build_vars['android_sdk_version'])
   variables['main'] = generator.Generate(entry)
@@ -716,7 +738,7 @@
     _ExtractZips(generator.project_dir, zip_tuples)
 
   logging.warning('Project created! (%d subprojects)', len(project_entries))
-  logging.warning('Generated projects are targeting Android Studio 2.3')
+  logging.warning('Generated projects work best with Android Studio 2.2')
   logging.warning('For more tips: https://chromium.googlesource.com/chromium'
                   '/src.git/+/master/docs/android_studio.md')