351 lines
10 KiB
Python
351 lines
10 KiB
Python
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#!/usr/bin/env vpython3
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# Copyright 2023 The Chromium Authors
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Generates a single BUILD.gn file with build targets generated using the
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# manifest files in the SDK.
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import json
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import logging
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import os
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import shutil
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import sys
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DIR_SRC_ROOT = os.path.abspath(
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os.path.join(os.path.dirname(__file__), os.pardir, os.pardir))
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def GetHostOS():
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"""Get host operating system."""
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host_platform = sys.platform
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if host_platform.startswith('linux'):
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return 'linux'
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if host_platform.startswith('darwin'):
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return 'mac'
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raise Exception('Unsupported host platform: %s' % host_platform)
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# Inserted at the top of the generated BUILD.gn file.
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_GENERATED_PREAMBLE = """# DO NOT EDIT! This file was generated by
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# //build/fuchsia/gen_build_def.py.
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# Any changes made to this file will be discarded.
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import("//third_party/fuchsia/sdk/{host_os}-amd64/build/fidl_library.gni")
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import("//third_party/fuchsia/sdk/{host_os}-amd64/build/fuchsia_sdk_pkg.gni")
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""".format(host_os=GetHostOS())
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SDK_ROOT = os.path.join(DIR_SRC_ROOT, 'third_party', 'fuchsia', 'sdk',
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f'{GetHostOS()}-amd64')
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def ReformatTargetName(dep_name):
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""""Substitutes characters in |dep_name| which are not valid in GN target
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names (e.g. dots become hyphens)."""
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return dep_name
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def FormatGNTarget(fields):
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"""Returns a GN target definition as a string.
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|fields|: The GN fields to include in the target body.
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'target_name' and 'type' are mandatory."""
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output = '%s("%s") {\n' % (fields['type'], fields['target_name'])
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del fields['target_name']
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del fields['type']
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# Ensure that fields with no ordering requirement are sorted.
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for field in ['sources', 'public_deps']:
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if field in fields:
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fields[field].sort()
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for key, val in fields.items():
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if isinstance(val, str):
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val_serialized = '\"%s\"' % val
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elif isinstance(val, list):
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# Serialize a list of strings in the prettiest possible manner.
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if len(val) == 0:
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val_serialized = '[]'
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elif len(val) == 1:
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val_serialized = '[ \"%s\" ]' % val[0]
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else:
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val_serialized = '[\n ' + ',\n '.join(['\"%s\"' % x
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for x in val]) + '\n ]'
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else:
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raise Exception('Could not serialize %r' % val)
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output += ' %s = %s\n' % (key, val_serialized)
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output += '}'
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return output
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def MetaRootRelativePaths(sdk_relative_paths, meta_root):
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return [os.path.relpath(path, meta_root) for path in sdk_relative_paths]
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def ConvertCommonFields(json):
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"""Extracts fields from JSON manifest data which are used across all
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target types. Note that FIDL packages do their own processing."""
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meta_root = json['root']
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converted = {'target_name': ReformatTargetName(json['name'])}
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if 'deps' in json:
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converted['public_deps'] = MetaRootRelativePaths(json['deps'],
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os.path.dirname(meta_root))
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# FIDL bindings dependencies are relative to the "fidl" sub-directory.
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if 'fidl_binding_deps' in json:
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for entry in json['fidl_binding_deps']:
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converted['public_deps'] += MetaRootRelativePaths([
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'fidl/' + dep + ':' + os.path.basename(dep) + '_' +
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entry['binding_type'] for dep in entry['deps']
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], meta_root)
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return converted
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def ConvertFidlLibrary(json):
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"""Converts a fidl_library manifest entry to a GN target.
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Arguments:
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json: The parsed manifest JSON.
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Returns:
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The GN target definition, represented as a string."""
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meta_root = json['root']
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converted = ConvertCommonFields(json)
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converted['type'] = 'fidl_library'
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converted['sources'] = MetaRootRelativePaths(json['sources'], meta_root)
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converted['library_name'] = json['name']
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return converted
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def ConvertCcPrebuiltLibrary(json):
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"""Converts a cc_prebuilt_library manifest entry to a GN target.
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Arguments:
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json: The parsed manifest JSON.
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Returns:
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The GN target definition, represented as a string."""
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meta_root = json['root']
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converted = ConvertCommonFields(json)
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converted['type'] = 'fuchsia_sdk_pkg'
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converted['sources'] = MetaRootRelativePaths(json['headers'], meta_root)
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converted['include_dirs'] = MetaRootRelativePaths([json['include_dir']],
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meta_root)
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if json['format'] == 'shared':
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converted['shared_libs'] = [json['name']]
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else:
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converted['static_libs'] = [json['name']]
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return converted
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def ConvertCcSourceLibrary(json):
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"""Converts a cc_source_library manifest entry to a GN target.
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Arguments:
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json: The parsed manifest JSON.
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Returns:
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The GN target definition, represented as a string."""
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meta_root = json['root']
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converted = ConvertCommonFields(json)
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converted['type'] = 'fuchsia_sdk_pkg'
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# Headers and source file paths can be scattered across "sources", "headers",
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# and "files". Merge them together into one source list.
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converted['sources'] = MetaRootRelativePaths(json['sources'], meta_root)
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if 'headers' in json:
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converted['sources'] += MetaRootRelativePaths(json['headers'], meta_root)
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if 'files' in json:
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converted['sources'] += MetaRootRelativePaths(json['files'], meta_root)
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converted['sources'] = list(set(converted['sources']))
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converted['include_dirs'] = MetaRootRelativePaths([json['include_dir']],
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meta_root)
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return converted
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def ConvertLoadableModule(json):
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"""Converts a loadable module manifest entry to GN targets.
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Arguments:
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json: The parsed manifest JSON.
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Returns:
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A list of GN target definitions."""
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name = json['name']
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if name != 'vulkan_layers':
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raise RuntimeError('Unsupported loadable_module: %s' % name)
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# Copy resources and binaries
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resources = json['resources']
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binaries = json['binaries']
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def _filename_no_ext(name):
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return os.path.splitext(os.path.basename(name))[0]
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# Pair each json resource with its corresponding binary. Each such pair
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# is a "layer". We only need to check one arch because each arch has the
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# same list of binaries.
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arch = next(iter(binaries))
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binary_names = binaries[arch]
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local_pkg = json['root']
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vulkan_targets = []
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for res in resources:
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layer_name = _filename_no_ext(res)
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# Filter binaries for a matching name.
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filtered = [n for n in binary_names if _filename_no_ext(n) == layer_name]
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if not filtered:
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# If the binary could not be found then do not generate a
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# target for this layer. The missing targets will cause a
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# mismatch with the "golden" outputs.
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continue
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# Replace hardcoded arch in the found binary filename.
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binary = filtered[0].replace('/' + arch + '/', "/${target_cpu}/")
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target = {}
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target['name'] = layer_name
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target['config'] = os.path.relpath(res, start=local_pkg)
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target['binary'] = os.path.relpath(binary, start=local_pkg)
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vulkan_targets.append(target)
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converted = []
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all_target = {}
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all_target['target_name'] = 'all'
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all_target['type'] = 'group'
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all_target['data_deps'] = []
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for target in vulkan_targets:
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config_target = {}
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config_target['target_name'] = target['name'] + '_config'
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config_target['type'] = 'copy'
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config_target['sources'] = [target['config']]
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config_target['outputs'] = ['${root_gen_dir}/' + target['config']]
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converted.append(config_target)
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lib_target = {}
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lib_target['target_name'] = target['name'] + '_lib'
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lib_target['type'] = 'copy'
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lib_target['sources'] = [target['binary']]
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lib_target['outputs'] = ['${root_out_dir}/lib/{{source_file_part}}']
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converted.append(lib_target)
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group_target = {}
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group_target['target_name'] = target['name']
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group_target['type'] = 'group'
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group_target['data_deps'] = [
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':' + target['name'] + '_config', ':' + target['name'] + '_lib'
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]
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converted.append(group_target)
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all_target['data_deps'].append(':' + target['name'])
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converted.append(all_target)
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return converted
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def ConvertNoOp(json):
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"""Null implementation of a conversion function. No output is generated."""
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return None
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"""Maps manifest types to conversion functions."""
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_CONVERSION_FUNCTION_MAP = {
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'fidl_library': ConvertFidlLibrary,
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'cc_source_library': ConvertCcSourceLibrary,
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'cc_prebuilt_library': ConvertCcPrebuiltLibrary,
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'loadable_module': ConvertLoadableModule,
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# No need to build targets for these types yet.
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'companion_host_tool': ConvertNoOp,
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'component_manifest': ConvertNoOp,
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'config': ConvertNoOp,
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'dart_library': ConvertNoOp,
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'data': ConvertNoOp,
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'device_profile': ConvertNoOp,
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'documentation': ConvertNoOp,
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'ffx_tool': ConvertNoOp,
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'host_tool': ConvertNoOp,
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'image': ConvertNoOp,
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'sysroot': ConvertNoOp,
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}
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def ConvertMeta(meta_path):
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parsed = json.load(open(meta_path))
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if 'type' not in parsed:
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return
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convert_function = _CONVERSION_FUNCTION_MAP.get(parsed['type'])
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if convert_function is None:
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logging.warning('Unexpected SDK artifact type %s in %s.' %
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(parsed['type'], meta_path))
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return
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converted = convert_function(parsed)
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if not converted:
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return
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output_path = os.path.join(os.path.dirname(meta_path), 'BUILD.gn')
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if os.path.exists(output_path):
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os.unlink(output_path)
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with open(output_path, 'w') as buildfile:
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buildfile.write(_GENERATED_PREAMBLE)
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# Loadable modules have multiple targets
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if convert_function != ConvertLoadableModule:
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buildfile.write(FormatGNTarget(converted) + '\n\n')
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else:
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for target in converted:
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buildfile.write(FormatGNTarget(target) + '\n\n')
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def ProcessSdkManifest():
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toplevel_meta = json.load(
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open(os.path.join(SDK_ROOT, 'meta', 'manifest.json')))
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for part in toplevel_meta['parts']:
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meta_path = os.path.join(SDK_ROOT, part['meta'])
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ConvertMeta(meta_path)
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def main():
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# Exit if there's no Fuchsia support for this platform.
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try:
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GetHostOS()
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except:
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logging.warning('Fuchsia SDK is not supported on this platform.')
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return 0
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# TODO(crbug/1432399): Remove this when links to these files inside the sdk
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# directory have been redirected.
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shutil.copytree(os.path.join(DIR_SRC_ROOT, 'third_party', 'fuchsia-gn-sdk',
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'src'),
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os.path.join(SDK_ROOT, 'build'),
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dirs_exist_ok=True)
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ProcessSdkManifest()
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if __name__ == '__main__':
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sys.exit(main())
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