Add split-select logic to apk_install.py & fix crash when --split-apk-path is used

build/android/gyp/apk_install.py

 #!/usr/bin/env python
 #
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Installs an APK.
 
 """
 
 import optparse
 import os
 import re
 import sys
 
 from util import build_device
 from util import build_utils
 from util import md5_check
 
 BUILD_ANDROID_DIR = os.path.join(os.path.dirname(__file__), '..')
 sys.path.append(BUILD_ANDROID_DIR)
 
 from pylib import constants
 from pylib.utils import apk_helper
 
+def RetrieveDeviceConfig(device):
+  """Probes the given device for its split-select config."""
+  SHELL_CONFIG_COMMAND = ('echo $(getprop persist.sys.language)-'

[jbudorick, 2015/05/19 15:06:59]

I have questions about this that I'll ask you about out-of-band.

[agrieve, 2015/05/19 18:34:53]

Acknowledged.

+      'r$(getprop persist.sys.country)-'
+      '$(D=$(getprop ro.sf.lcd_density);'
+      '  D=${D/120/ldpi};'
+      '  D=${D/160/mdpi};'
+      '  D=${D/240/hdpi};'
+      '  D=${D/320/xhdpi};'
+      '  D=${D/480/xxhdpi};'
+      '  D=${D/[0-9]*/tvdpi/};'
+      '  echo $D):'
+      '$(getprop ro.product.cpu.abi)')
+  return device.RunShellCommand(SHELL_CONFIG_COMMAND)[0]
+
+
 def GetNewMetadata(device, apk_package):
   """Gets the metadata on the device for the apk_package apk."""
   output = device.RunShellCommand('ls -l /data/app/')
   # Matches lines like:
   # -rw-r--r-- system   system    7376582 2013-04-19 16:34 \
   # org.chromium.chrome.shell.apk
   # -rw-r--r-- system   system    7376582 2013-04-19 16:34 \
   # org.chromium.chrome.shell-1.apk
   apk_matcher = lambda s: re.match('.*%s(-[0-9]*)?(.apk)?$' % apk_package, s)
   matches = filter(apk_matcher, output)
@@ skipping 19 matching lines @@
 
 
 def main():
   parser = optparse.OptionParser()
   parser.add_option('--apk-path',
       help='Path to .apk to install.')
   parser.add_option('--split-apk-path',
       help='Path to .apk splits (can specify multiple times, causes '
       '--install-multiple to be used.',
       action='append')
+  parser.add_option('--android-sdk-tools',
+      help='Path to the Android SDK build tools folder. ' +
+           'Required when using --split-apk-path.')
   parser.add_option('--install-record',
       help='Path to install record (touched only when APK is installed).')
   parser.add_option('--build-device-configuration',
       help='Path to build device configuration.')
   parser.add_option('--stamp',
       help='Path to touch on success.')
   parser.add_option('--configuration-name',
       help='The build CONFIGURATION_NAME')
   options, _ = parser.parse_args()
 
   device = build_device.GetBuildDeviceFromPath(
       options.build_device_configuration)
   if not device:
     return
 
   constants.SetBuildType(options.configuration_name)
 
   serial_number = device.GetSerialNumber()
   apk_package = apk_helper.GetPackageName(options.apk_path)
 
   metadata_path = '%s.%s.device.time.stamp' % (options.apk_path, serial_number)
 
   # If the APK on the device does not match the one that was last installed by
   # the build, then the APK has to be installed (regardless of the md5 record).
   force_install = HasInstallMetadataChanged(device, apk_package, metadata_path)
 
+  def SelectSplits(target_config, base_apk, split_apks, android_sdk_tools):
+    cmd = [os.path.join(android_sdk_tools, 'split-select'),
+           '--target', target_config,
+           '--base', base_apk,
+           ]
+    for split in split_apks:
+      cmd.extend(('--split', split))
+
+    # split-select outputs one path per line and a blank line at the end.
+    output = build_utils.CheckOutput(cmd)
+    return [x for x in output.split('\n') if x]
+
   def Install():
-    # TODO: Filter splits using split-select.
-    active_splits = options.split_apk_path
-    if active_splits:
-      device.adb.InstallMultiple(
-          [options.apk_path] + active_splits,
-          reinstall=True)
+    if options.split_apk_path:

[jbudorick, 2015/05/19 15:12:48]

This should check against a minimum SDK level, e.g.
https://code.google.com/p/chromium/codesearch#chromium/src/build/android/prov...

+      device_config = RetrieveDeviceConfig(device)
+      active_splits = SelectSplits(device_config, options.apk_path,

[jbudorick, 2015/05/19 15:06:59]

nit: either indent params on subsequent lines to the depth of the first
parameter, or drop all of the params to a subsequent line & indent four spaces.

(it differs from our java indentation rules, which always gets me going the
other way)

[agrieve, 2015/05/19 18:34:52]

Done.

+          options.split_apk_path, options.android_sdk_tools)
+
+      all_apks = [options.apk_path] + active_splits
+      apk_names = [os.path.basename(path) for path in all_apks]
+      print('Installing apks: ' + ', '.join(apk_names))

[jbudorick, 2015/05/19 15:06:59]

nit: We don't typically use the python3 print syntax.

[agrieve, 2015/05/19 18:34:53]

Done.

+      device.device.adb.InstallMultiple(all_apks, reinstall=True)
     else:
       device.Install(options.apk_path, reinstall=True)
 
     RecordInstallMetadata(device, apk_package, metadata_path)
     build_utils.Touch(options.install_record)
 
 
   record_path = '%s.%s.md5.stamp' % (options.apk_path, serial_number)
   md5_check.CallAndRecordIfStale(
       Install,
       record_path=record_path,
       input_paths=[options.apk_path],
       force=force_install)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 
 if __name__ == '__main__':
   sys.exit(main())