318f41fb2c
This avoids a bogus circular dependency error in the next commit: interfaces/chain -> interfaces/wallet -> wallet/wallet -> interfaces/chain Which is incorrect, because interfaces/chain.cpp depends only on the interfaces/wallet.h file, not the interfaces/wallet.cpp file, and it is wrong to treat these as a unit. Inside the interfaces directory, .h files contain abstract class definitions and .cpp files contain implementations of those classes, so you don't need to link against .cpp files if you're only using the abstract class definition in the .h file. An alternative fix might be to rename all the cpp files in the interfaces directory like: chain.cpp->chain_impl.cpp, node.cpp->node_impl.cpp. But just getting the linter to treat these files as independent dependencies seemed like it would allow keeping code organization straightforward and avoiding the need to rename things.
89 lines
2.9 KiB
Python
Executable file
89 lines
2.9 KiB
Python
Executable file
#!/usr/bin/env python3
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import sys
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import re
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MAPPING = {
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'core_read.cpp': 'core_io.cpp',
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'core_write.cpp': 'core_io.cpp',
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}
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# Directories with header-based modules, where the assumption that .cpp files
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# define functions and variables declared in corresponding .h files is
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# incorrect.
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HEADER_MODULE_PATHS = [
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'interfaces/'
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]
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def module_name(path):
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if path in MAPPING:
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path = MAPPING[path]
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if any(path.startswith(dirpath) for dirpath in HEADER_MODULE_PATHS):
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return path
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if path.endswith(".h"):
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return path[:-2]
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if path.endswith(".c"):
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return path[:-2]
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if path.endswith(".cpp"):
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return path[:-4]
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return None
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files = dict()
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deps = dict()
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RE = re.compile("^#include <(.*)>")
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# Iterate over files, and create list of modules
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for arg in sys.argv[1:]:
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module = module_name(arg)
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if module is None:
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print("Ignoring file %s (does not constitute module)\n" % arg)
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else:
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files[arg] = module
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deps[module] = set()
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# Iterate again, and build list of direct dependencies for each module
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# TODO: implement support for multiple include directories
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for arg in sorted(files.keys()):
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module = files[arg]
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with open(arg, 'r', encoding="utf8") as f:
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for line in f:
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match = RE.match(line)
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if match:
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include = match.group(1)
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included_module = module_name(include)
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if included_module is not None and included_module in deps and included_module != module:
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deps[module].add(included_module)
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# Loop to find the shortest (remaining) circular dependency
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have_cycle = False
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while True:
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shortest_cycle = None
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for module in sorted(deps.keys()):
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# Build the transitive closure of dependencies of module
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closure = dict()
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for dep in deps[module]:
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closure[dep] = []
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while True:
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old_size = len(closure)
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old_closure_keys = sorted(closure.keys())
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for src in old_closure_keys:
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for dep in deps[src]:
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if dep not in closure:
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closure[dep] = closure[src] + [src]
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if len(closure) == old_size:
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break
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# If module is in its own transitive closure, it's a circular dependency; check if it is the shortest
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if module in closure and (shortest_cycle is None or len(closure[module]) + 1 < len(shortest_cycle)):
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shortest_cycle = [module] + closure[module]
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if shortest_cycle is None:
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break
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# We have the shortest circular dependency; report it
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module = shortest_cycle[0]
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print("Circular dependency: %s" % (" -> ".join(shortest_cycle + [module])))
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# And then break the dependency to avoid repeating in other cycles
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deps[shortest_cycle[-1]] = deps[shortest_cycle[-1]] - set([module])
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have_cycle = True
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sys.exit(1 if have_cycle else 0)
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