96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
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#!/usr/bin/python3
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#
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# Copyright (c) 2017 The Khronos Group Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# extDependency - generate a mapping of extension name -> all required
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# extension names for that extension.
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#
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# This is run only rarely, when adding a new extension, and updates
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# doc/specs/vulkan/config/extDependency.sh from the spec Makefile.
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# It also defines lists of KHR extensions and all extensions for use in make
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# frontend scripts in doc/specs/vulkan.
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import argparse
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import xml.etree.ElementTree as etree
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import networkx as nx
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# -extension name - may be a single extension name, a space-separated list
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# of names, or a regular expression.
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument('-registry', action='store',
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default='vk.xml',
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help='Use specified registry file instead of vk.xml')
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parser.add_argument('-test', action='store',
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default=None,
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help='Specify extension to find dependencies of')
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parser.add_argument('-quiet', action='store_true', default=False,
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help='Suppress script output during normal execution.')
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args = parser.parse_args()
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tree = etree.parse(args.registry)
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# Loop over all supported extensions, creating a digraph of the
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# extension dependencies in the 'requires' attribute, which is a
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# comma-separated list of extension names. Also track lists of
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# all extensions and all KHR extensions.
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allExts = set()
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khrExts = set()
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g = nx.DiGraph()
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for elem in tree.findall('extensions/extension'):
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name = elem.get('name')
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supported = elem.get('supported')
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if (supported == 'vulkan'):
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allExts.add(name)
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if ('KHR' in name):
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khrExts.add(name)
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if ('requires' in elem.attrib):
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deps = elem.get('requires').split(',')
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for dep in deps:
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g.add_path([name, dep])
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else:
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g.add_node(name)
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else:
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# Skip unsupported extensions
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True
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print('#!/bin/bash')
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print('# Generated from src/spec/extDependency.py')
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print('# Specify maps of all extensions required by an enabled extension')
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print('')
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print('declare -A extensions')
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# When printing lists of extensions, sort them sort the output script
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# remains as stable as possible as extensions are added to vk.xml.
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for ext in sorted(g.nodes()):
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children = nx.descendants(g, ext)
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# Only emit an ifdef block if an extension has dependencies
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if len(children) > 0:
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print('extensions[' + ext + ']="' + ' '.join(sorted(children)) + '"')
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print('')
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print('# Define lists of all extensions and all KHR extensions')
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print('allExts="' + ' '.join([str(k) for k in sorted(allExts)]) + '"')
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print('khrExts="' + ' '.join([str(k) for k in sorted(khrExts)]) + '"')
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