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#!/usr/bin/env python3
# Converts clang-scan-deps output into response files.
# * For modules, arguments in the resulting response file are enough to build a PCM.
# * For translation units, the response file needs to be added to the original Clang invocation from compilation
# database.
#
# Usage:
#
# clang-scan-deps -compilation-database compile_commands.json ... > deps.json
# module-deps-to-rsp.py deps.json --module-name=ModuleName > module_name.cc1.rsp
# module-deps-to-rsp.py deps.json --tu-index=0 > tu.rsp
# clang @module_name.cc1.rsp
# clang ... @tu.rsp
import argparse
import json
import sys
class ModuleNotFoundError(Exception):
def __init__(self, module_name):
self.module_name = module_name
class FullDeps:
def __init__(self):
self.modules = {}
self.translation_units = []
def findModule(module_name, full_deps):
for m in full_deps.modules.values():
if m['name'] == module_name:
return m
raise ModuleNotFoundError(module_name)
def parseFullDeps(json):
ret = FullDeps()
for m in json['modules']:
ret.modules[m['name'] + '-' + m['context-hash']] = m
ret.translation_units = json['translation-units']
return ret
def quote(str):
return '"' + str.replace("\\", "\\\\") + '"'
def main():
parser = argparse.ArgumentParser()
parser.add_argument("full_deps_file", help="Path to the full dependencies json file",
type=str)
action = parser.add_mutually_exclusive_group(required=True)
action.add_argument("--module-name", help="The name of the module to get arguments for",
type=str)
action.add_argument("--tu-index", help="The index of the translation unit to get arguments for",
type=int)
args = parser.parse_args()
full_deps = parseFullDeps(json.load(open(args.full_deps_file, 'r')))
try:
cmd = []
if args.module_name:
cmd = findModule(args.module_name, full_deps)['command-line']
elif args.tu_index != None:
cmd = full_deps.translation_units[args.tu_index]['command-line']
print(" ".join(map(quote, cmd)))
except:
print("Unexpected error:", sys.exc_info()[0])
raise
if __name__ == '__main__':
main()
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