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88 lines
3.3 KiB
88 lines
3.3 KiB
4 years ago
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# Copyright 2020 The Meson development team
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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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# http://www.apache.org/licenses/LICENSE-2.0
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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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import pathlib
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import pickle
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import re
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import typing as T
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import_re = re.compile('\w*import ([a-zA-Z0-9]+);')
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export_re = re.compile('\w*export module ([a-zA-Z0-9]+);')
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class DependencyScanner:
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def __init__(self, pickle_file, outfile, sources):
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with open(pickle_file, 'rb') as pf:
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self.target_data = pickle.load(pf)
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self.outfile = outfile
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self.sources = sources
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self.provided_by = {}
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self.exports = {}
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self.needs = {}
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self.sources_with_exports = []
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def scan_file(self, fname):
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for line in pathlib.Path(fname).read_text().split('\n'):
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import_match = import_re.match(line)
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export_match = export_re.match(line)
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if import_match:
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needed = import_match.group(1)
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if fname in self.needs:
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self.needs[fname].append(needed)
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else:
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self.needs[fname] = [needed]
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if export_match:
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exported_module = export_match.group(1)
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if exported_module in self.provided_by:
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raise RuntimeError('Multiple files provide module {}.'.format(exported_module))
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self.sources_with_exports.append(fname)
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self.provided_by[exported_module] = fname
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self.exports[fname] = exported_module
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def objname_for(self, src):
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return self.target_data.source2object[src]
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def ifcname_for(self, src):
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return '{}.ifc'.format(self.exports[src])
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def scan(self):
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for s in self.sources:
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self.scan_file(s)
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with open(self.outfile, 'w') as ofile:
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ofile.write('ninja_dyndep_version = 1\n')
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for src in self.sources:
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objfilename = self.objname_for(src)
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if src in self.sources_with_exports:
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ifc_entry = '| ' + self.ifcname_for(src)
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else:
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ifc_entry = ''
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if src in self.needs:
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# FIXME, handle all sources, not just the first one
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modname = self.needs[src][0]
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provider_src = self.provided_by[modname]
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provider_ifc = self.ifcname_for(provider_src)
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mod_dep = '| ' + provider_ifc
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else:
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mod_dep = ''
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ofile.write('build {} {}: dyndep {}\n'.format(objfilename,
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ifc_entry,
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mod_dep))
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return 0
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def run(args: T.List[str]) -> int:
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pickle_file = args[0]
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outfile = args[1]
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sources = args[2:]
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scanner = DependencyScanner(pickle_file, outfile, sources)
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return scanner.scan()
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