Scripts to generate Android.mk for framework Skia.

In order to create Android.mk, run

>> python platform_tools/android/bin/gyp_to_android.py

For the change in the Android.mk file, see
https://googleplex-android-review.git.corp.google.com/#/c/408170/

(SkipBuildbotRuns)

BUG=skia:1975
R=djsollen@google.com, epoger@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/140503007

git-svn-id: http://skia.googlecode.com/svn/trunk@13344 2bbb7eff-a529-9590-31e7-b0007b416f81

2 files changed, 213 insertions, 0 deletions

diff --git a/platform_tools/android/bin/android_framework_gyp.py b/platform_tools/android/bin/android_framework_gyp.py
new file mode 100644
index 0000000000..7654492f07
--- /dev/null
+++ b/platform_tools/android/bin/android_framework_gyp.py
@@ -0,0 +1,79 @@
+#!/usr/bin/python
+
+# Copyright 2014 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Modified version of gyp_skia, used by gyp_to_android.py to generate Android.mk
+"""
+
+import os
+import sys
+
+SCRIPT_DIR = os.path.abspath(os.path.dirname(__file__))
+
+# Unlike gyp_skia, this file is nested deep inside Skia. Find Skia's trunk dir.
+# This line depends on the fact that the script is three levels deep
+# (specifically, it is in platform_tools/android/bin).
+SKIA_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir,
+                                         os.pardir))
+dir_contents = os.listdir(SKIA_DIR)
+assert 'third_party' in dir_contents and 'gyp' in dir_contents
+
+# Directory within which we can find the gyp source.
+GYP_SOURCE_DIR = os.path.join(SKIA_DIR, 'third_party', 'externals', 'gyp')
+
+# Ensure we import our current gyp source's module, not any version
+# pre-installed in your PYTHONPATH.
+sys.path.insert(0, os.path.join(GYP_SOURCE_DIR, 'pylib'))
+
+import gyp
+
+def main(target_dir, target_file, skia_arch_type, have_neon):
+  """
+  Create gypd files based on target_file.
+  @param target_dir Directory containing all gyp files, including common.gypi
+  @param target_file Gyp file to start on. Other files within target_dir will
+                     be read if target_file depends on them.
+  @param skia_arch_type Target architecture to pass to gyp.
+  @param have_neon Whether to generate files including neon optimizations.
+                   Only meaningful if skia_arch_type is 'arm'.
+  @return path Path to root gypd file created by running gyp.
+  """
+  # Set GYP_DEFINES for building for the android framework.
+  gyp_defines = ('skia_android_framework=1 OS=android skia_arch_type=%s '
+                 % skia_arch_type)
+  if skia_arch_type == 'arm':
+    # Always use thumb and version 7 for arm
+    gyp_defines += 'arm_thumb=1 arm_version=7 '
+    if have_neon:
+      gyp_defines += 'arm_neon=1 '
+    else:
+      gyp_defines += 'arm_neon=0 '
+
+  os.environ['GYP_DEFINES'] = gyp_defines
+
+  args = []
+  args.extend(['--depth', '.'])
+  full_path = os.path.join(target_dir, target_file)
+  args.extend([full_path])
+  # Common conditions
+  args.extend(['-I', os.path.join(target_dir, 'common.gypi')])
+  # Use the debugging format. We'll use these to create one master make file.
+  args.extend(['-f', 'gypd'])
+
+  # Off we go...
+  ret = gyp.main(args)
+
+  if ret != 0:
+    raise Exception("gyp failed!")
+
+  # Running gyp should have created a gypd file, with the same name as
+  # full_path but with a 'd' on the end.
+  gypd_file = full_path + 'd'
+  if not os.path.exists(gypd_file):
+    raise Exception("gyp failed to produce gypd file!")
+
+  return gypd_file
diff --git a/platform_tools/android/bin/gyp_to_android.py b/platform_tools/android/bin/gyp_to_android.py
new file mode 100644
index 0000000000..7990ae9d8b
--- /dev/null
+++ b/platform_tools/android/bin/gyp_to_android.py
@@ -0,0 +1,134 @@
+#!/usr/bin/python
+
+# Copyright 2014 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Script for generating the Android framework's version of Skia from gyp
+files.
+"""
+
+import android_framework_gyp
+import os
+import shutil
+import sys
+import tempfile
+
+# Find the top of trunk
+SCRIPT_DIR = os.path.abspath(os.path.dirname(__file__))
+SKIA_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir,
+                                         os.pardir))
+
+# Find the directory with our helper files, and add it to the path.
+GYP_GEN_DIR = os.path.join(SKIA_DIR, 'platform_tools', 'android', 'gyp_gen')
+sys.path.append(GYP_GEN_DIR)
+
+import gypd_parser
+import makefile_writer
+import variables
+import vars_dict_lib
+
+# Folder containing all gyp files and generated gypd files.
+GYP_FOLDER = 'gyp'
+
+def clean_gypd_files(folder):
+  """
+  Remove the gypd files generated by android_framework_gyp.main().
+  @param folder Folder in which to delete all files ending with 'gypd'.
+  """
+  assert os.path.isdir(folder)
+  files = os.listdir(folder)
+  for f in files:
+    if f.endswith('gypd'):
+      os.remove(os.path.join(folder, f))
+
+def generate_var_dict(target_dir, target_file, skia_arch_type, have_neon):
+  """
+  Create a VarsDict for a particular arch type. Each paramater is passed
+  directly to android_framework_gyp.main().
+  @param target_dir Directory containing gyp files.
+  @param target_file Target gyp file.
+  @param skia_arch_type Target architecture.
+  @param have_neon Whether the target should build for neon.
+  @return a VarsDict containing the variable definitions determined by gyp.
+  """
+  result_file = android_framework_gyp.main(target_dir, target_file,
+                                           skia_arch_type, have_neon)
+  var_dict = vars_dict_lib.VarsDict()
+  gypd_parser.parse_gypd(var_dict, result_file)
+  clean_gypd_files(target_dir)
+  print '.',
+  return var_dict
+
+def main(target_dir=None):
+  """
+  Read gyp files and create Android.mk for the Android framework's
+  external/skia.
+  @param target_dir Directory in which to place 'Android.mk'. If None, the file
+                    will be placed in skia's root directory.
+  """
+  # Create a temporary folder to hold gyp and gypd files. Create it in SKIA_DIR
+  # so that it is a sibling of gyp/, so the relationships between gyp files and
+  # other files (e.g. platform_tools/android/gyp/dependencies.gypi, referenced
+  # by android_deps.gyp as a relative path) is unchanged.
+  # Use mkdtemp to find an unused folder name, but then delete it so copytree
+  # can be called with a non-existent directory.
+  tmp_folder = tempfile.mkdtemp(dir=SKIA_DIR)
+  os.rmdir(tmp_folder)
+  shutil.copytree(os.path.join(SKIA_DIR, GYP_FOLDER), tmp_folder)
+
+  try:
+    main_gyp_file = 'android_framework_lib.gyp'
+
+    print 'Creating Android.mk',
+
+    # Generate a separate VarsDict for each architecture type.  For each
+    # archtype:
+    # 1. call android_framework_gyp.main() to generate gypd files
+    # 2. call parse_gypd to read those gypd files into the VarsDict
+    # 3. delete the gypd files
+    #
+    # Once we have the VarsDict for each architecture type, we combine them all
+    # into a single Android.mk file, which can build targets of any
+    # architecture type.
+
+    # The default uses a non-existant archtype, to find all the general
+    # variable definitions.
+    default_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'other',
+                                         False)
+    arm_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'arm', False)
+    arm_neon_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'arm',
+                                          True)
+    if variables.INCLUDE_X86_OPTS:
+      x86_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'x86', False)
+    else:
+      x86_var_dict = None
+
+    # Compute the intersection of all targets. All the files in the intersection
+    # should be part of the makefile always. Each dict will now contain trimmed
+    # lists containing only variable definitions specific to that configuration.
+    var_dict_list = [default_var_dict, arm_var_dict, arm_neon_var_dict]
+    if variables.INCLUDE_X86_OPTS:
+      var_dict_list.append(x86_var_dict)
+    common = vars_dict_lib.intersect(var_dict_list)
+
+    # Further trim arm_neon_var_dict with arm_var_dict. After this call,
+    # arm_var_dict (which will now be the intersection) includes all definitions
+    # used by both arm and arm + neon, and arm_neon_var_dict will only contain
+    # those specific to arm + neon.
+    arm_var_dict = vars_dict_lib.intersect([arm_var_dict, arm_neon_var_dict])
+
+    makefile_writer.write_android_mk(target_dir=target_dir,
+                                     common=common,
+                                     arm=arm_var_dict,
+                                     arm_neon=arm_neon_var_dict,
+                                     x86=x86_var_dict,
+                                     default=default_var_dict)
+
+  finally:
+    shutil.rmtree(tmp_folder)
+
+if __name__ == '__main__':
+  main()