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skia2/gn/gn_to_bp.py
Ben Wagner e127523b4a gn_to_bp to recurse deps. 
Currently gn_to_bp GrabDependentSrcs only grabs the top level deps of
a target. In a proposed change there are more levels of deps to
clarify the real dependencies. To make this work well, a number of
lists are now sets to avoid including the same file multiple times.

Change-Id: I5005718e42762fe411215920e8991ab27138c7eb
Reviewed-on: https://skia-review.googlesource.com/8936
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2017-02-24 14:48:22 +00:00

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#!/usr/bin/env python
#
# Copyright 2016 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Generate Android.bp for Skia from GN configuration.
import json
import os
import pprint
import string
import subprocess
import tempfile
tool_cflags = [
'-Wno-unused-parameter',
]
# It's easier to maintain one list instead of separate lists.
tool_shared_libs = [
'liblog',
'libGLESv2',
'libEGL',
'libvulkan',
'libz',
'libjpeg',
'libpng',
'libicuuc',
'libicui18n',
'libexpat',
'libft2',
'libdng_sdk',
'libpiex',
]
# The ordering here is important: libsfntly needs to come after libskia.
tool_static_libs = [
'libarect',
'libjsoncpp',
'libskia',
'libsfntly',
'libwebp-decode',
'libwebp-encode',
]
# First we start off with a template for Android.bp,
# with holes for source lists and include directories.
bp = string.Template('''// This file is autogenerated by gn_to_bp.py.
cc_library {
name: "libskia",
cflags: [
"-fexceptions",
"-Wno-unused-parameter",
"-U_FORTIFY_SOURCE",
"-D_FORTIFY_SOURCE=1",
"-DSKIA_IMPLEMENTATION=1",
],
export_include_dirs: [
$export_includes
],
local_include_dirs: [
$local_includes
],
srcs: [
$srcs
],
arch: {
arm: {
srcs: [
$arm_srcs
],
armv7_a_neon: {
srcs: [
$arm_neon_srcs
],
},
},
arm64: {
srcs: [
$arm64_srcs
],
},
mips: {
srcs: [
$none_srcs
],
},
mips64: {
srcs: [
$none_srcs
],
},
x86: {
srcs: [
$x86_srcs
],
},
x86_64: {
srcs: [
$x86_srcs
],
},
},
shared_libs: [
"libEGL",
"libGLESv2",
"libdng_sdk",
"libexpat",
"libft2",
"libicui18n",
"libicuuc",
"libjpeg",
"liblog",
"libpiex",
"libpng",
"libvulkan",
"libz",
],
static_libs: [
"libarect",
"libsfntly",
"libwebp-decode",
"libwebp-encode",
],
}
cc_test {
name: "skia_dm",
cflags: [
$tool_cflags
],
local_include_dirs: [
$dm_includes
],
srcs: [
$dm_srcs
],
shared_libs: [
$tool_shared_libs
],
static_libs: [
$tool_static_libs
],
}
cc_test {
name: "skia_nanobench",
cflags: [
$tool_cflags
],
local_include_dirs: [
$nanobench_includes
],
srcs: [
$nanobench_srcs
],
shared_libs: [
$tool_shared_libs
],
static_libs: [
$tool_static_libs
],
}''')
# We'll run GN to get the main source lists and include directories for Skia.
gn_args = {
'skia_enable_vulkan_debug_layers': 'false',
'skia_use_system_expat': 'true',
'skia_use_system_jsoncpp': 'true',
'skia_use_system_libpng': 'true',
'skia_use_system_zlib': 'true',
'skia_use_vulkan': 'true',
'target_cpu': '"none"',
'target_os': '"android"',
}
gn_args = ' '.join(sorted('%s=%s' % (k,v) for (k,v) in gn_args.iteritems()))
tmp = tempfile.mkdtemp()
subprocess.check_call(['gn', 'gen', tmp, '--args=%s' % gn_args, '--ide=json'])
js = json.load(open(os.path.join(tmp, 'project.json')))
def strip_slashes(lst):
return {str(p.lstrip('/')) for p in lst}
srcs = strip_slashes(js['targets']['//:skia']['sources'])
local_includes = strip_slashes(js['targets']['//:skia']['include_dirs'])
export_includes = strip_slashes(js['targets']['//:public']['include_dirs'])
dm_srcs = strip_slashes(js['targets']['//:dm']['sources'])
dm_includes = strip_slashes(js['targets']['//:dm']['include_dirs'])
nanobench_target = js['targets']['//:nanobench']
nanobench_srcs = strip_slashes(nanobench_target['sources'])
nanobench_includes = strip_slashes(nanobench_target['include_dirs'])
def GrabDependentSrcs(name, srcs_to_extend, exclude):
# Grab the sources from other targets that $name depends on (e.g. optional
# Skia components, gms, tests, etc).
for dep in js['targets'][name]['deps']:
if 'third_party' in dep:
continue # We've handled all third-party DEPS as static or shared_libs.
if 'none' in dep:
continue # We'll handle all cpu-specific sources manually later.
if exclude and exclude in dep:
continue
srcs_to_extend.update(strip_slashes(js['targets'][dep].get('sources', [])))
GrabDependentSrcs(dep, srcs_to_extend, exclude)
GrabDependentSrcs('//:skia', srcs, None)
GrabDependentSrcs('//:dm', dm_srcs, 'skia')
GrabDependentSrcs('//:nanobench', nanobench_srcs, 'skia')
# No need to list headers.
srcs = {s for s in srcs if not s.endswith('.h')}
dm_srcs = {s for s in dm_srcs if not s.endswith('.h')}
nanobench_srcs = {s for s in nanobench_srcs if not s.endswith('.h')}
# Most defines go into SkUserConfig.h, where they're seen by Skia and its users.
# Start with the defines :skia uses, minus a couple. We'll add more in a bit.
defines = [str(d) for d in js['targets']['//:skia']['defines']]
defines.remove('SKIA_IMPLEMENTATION=1') # Only libskia should have this define.
# For architecture specific files, it's easier to just read the same source
# that GN does (opts.gni) rather than re-run GN once for each architecture.
# This .gni file we want to read is close enough to Python syntax
# that we can use execfile() if we supply definitions for GN builtins.
# While we're at it, grab defines specific to Android Framework the same way.
def get_path_info(path, kind):
assert kind == "abspath"
# While we want absolute paths in GN, relative paths work best here.
return path
builtins = { 'get_path_info': get_path_info }
defs = {}
here = os.path.dirname(__file__)
execfile(os.path.join(here, 'opts.gni'), builtins, defs)
execfile(os.path.join(here, 'android_framework_defines.gni'), builtins, defs)
# This should finish off the defines.
defines += defs['android_framework_defines']
defines.extend([
'GR_GL_CUSTOM_SETUP_HEADER "gl/GrGLConfig_chrome.h"',
'SKIA_DLL',
'SK_BUILD_FOR_ANDROID_FRAMEWORK',
'SK_DEFAULT_FONT_CACHE_LIMIT (768 * 1024)',
'SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (512 * 1024)',
'SK_IGNORE_ETC1_SUPPORT',
'SK_USE_FREETYPE_EMBOLDEN',
])
# TODO: move these all to android_framework_defines.gni?
# Turn paths from opts.gni into paths relative to external/skia.
def scrub(lst):
# Perform any string substitutions.
for var in defs:
if type(defs[var]) is str:
lst = [ p.replace('$'+var, defs[var]) for p in lst ]
# Relativize paths to top-level skia/ directory.
return [os.path.relpath(p, '..') for p in lst]
# Turn a list of strings into the style bpfmt outputs.
def bpfmt(indent, lst, sort=True):
if sort:
lst = sorted(lst)
return ('\n' + ' '*indent).join('"%s",' % v for v in lst)
# OK! We have everything to fill in Android.bp...
with open('Android.bp', 'w') as f:
print >>f, bp.substitute({
'export_includes': bpfmt(8, export_includes),
'local_includes': bpfmt(8, local_includes),
'srcs': bpfmt(8, srcs),
'arm_srcs': bpfmt(16, scrub(defs['armv7'])),
'arm_neon_srcs': bpfmt(20, scrub(defs['neon'])),
'arm64_srcs': bpfmt(16, scrub(defs['arm64'] +
defs['crc32'])),
'none_srcs': bpfmt(16, scrub(defs['none'])),
'x86_srcs': bpfmt(16, scrub(defs['sse2'] +
defs['ssse3'] +
defs['sse41'] +
defs['sse42'] +
defs['avx' ] +
defs['hsw' ])),
'tool_cflags' : bpfmt(8, tool_cflags),
'tool_shared_libs' : bpfmt(8, tool_shared_libs),
'tool_static_libs' : bpfmt(8, tool_static_libs, False),
'dm_includes' : bpfmt(8, dm_includes),
'dm_srcs' : bpfmt(8, dm_srcs),
'nanobench_includes' : bpfmt(8, nanobench_includes),
'nanobench_srcs' : bpfmt(8, nanobench_srcs),
})
#... and all the #defines we want to put in SkUserConfig.h.
with open('include/config/SkUserConfig.h', 'w') as f:
print >>f, '// This file is autogenerated by gn_to_bp.py.'
print >>f, '#ifndef SkUserConfig_DEFINED'
print >>f, '#define SkUserConfig_DEFINED'
for define in sorted(defines):
print >>f, ' #define', define.replace('=', ' ')
print >>f, '#endif//SkUserConfig_DEFINED'
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