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https://gitlab.torproject.org/tpo/core/tor.git
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117 lines
3.9 KiB
Python
Executable File
117 lines
3.9 KiB
Python
Executable File
#!/usr/bin/python
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"""
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Tor code best-practices tracker
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Go through the various .c files and collect metrics about them. If the metrics
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violate some of our best practices and they are not found in the optional
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exceptions file ("./exceptions.txt"), then log a violation about them.
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The exceptions file is meant to be initialized with the current state of the
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source code as follows: ./practracker.py > ./exceptions.txt
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We currently do metrics about file size, function size and number of includes.
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TODO:
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- How is this tool supposed to be used? How should the exception file work?
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How should the UI work? Does it need special exit codes?
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- Fix the function_length function so that practracker_tests.py passes.
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"""
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import os, sys
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import metrics
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import util
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# We don't want to run metrics for unittests, automatically-generated C files,
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# external libraries or git leftovers.
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EXCLUDE_SOURCE_DIRS = ["/src/test/", "/src/trunnel/", "/src/ext/", "/.git/"]
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# Where the Tor source code is
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TOR_TOPDIR = "../../../"
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# An optional exceptions_file
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EXCEPTIONS_FILE = "./exceptions.txt"
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# Recommended file size
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MAX_FILE_SIZE = 3000 # lines
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# Recommended function size
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MAX_FUNCTION_SIZE = 100 # lines
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# Recommended number of #includes
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MAX_INCLUDE_COUNT = 50
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#######################################################
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def print_violation_if_not_exception(violation_str, exceptions_str):
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# Check if this violation is already in the optional exceptions file
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if exceptions_str and violation_str in exceptions_str:
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return
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print violation_str
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#######################################################
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def consider_file_size(fname, f, exceptions_str):
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file_size = metrics.file_len(f)
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if file_size > MAX_FILE_SIZE:
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violation_str = "violation file-size %s %d" % (fname, file_size)
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print_violation_if_not_exception(violation_str, exceptions_str)
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def consider_includes(fname, f, exceptions_str):
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include_count = metrics.get_include_count(f)
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if include_count > MAX_INCLUDE_COUNT:
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violation_str = "violation include-count %s %d" % (fname, include_count)
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print_violation_if_not_exception(violation_str, exceptions_str)
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def consider_function_size(fname, f, exceptions_str):
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for name, lines in metrics.function_lines(f):
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# Don't worry about functions within our limits
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if lines <= MAX_FUNCTION_SIZE:
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continue
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# That's a big function! Issue a violation!
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canonical_function_name = "%s:%s()" % (fname,name)
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violation_str = "violation function-size %s %s" % (lines, canonical_function_name)
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print_violation_if_not_exception(violation_str, exceptions_str)
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#######################################################
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def consider_all_metrics(files_list, exceptions_str):
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"""Consider metrics for all files"""
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for fname in files_list:
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with open(fname, 'r') as f:
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consider_metrics_for_file(fname, f, exceptions_str)
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def consider_metrics_for_file(fname, f, exceptions_str):
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"""
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Get metrics for file with filename 'fname' and file descriptor 'f'.
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"""
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# Get file length
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consider_file_size(fname, f, exceptions_str)
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# Consider number of #includes
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f.seek(0)
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consider_includes(fname, f, exceptions_str)
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# Get function length
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f.seek(0)
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consider_function_size(fname, f, exceptions_str)
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def main():
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# 1) Get all the .c files we care about
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files_list = util.get_tor_c_files(TOR_TOPDIR, EXCLUDE_SOURCE_DIRS)
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# 2) Read an optional exceptions file so that we don't warn about the past
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exceptions_str = None
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try:
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with open(EXCEPTIONS_FILE, 'r') as exception_f:
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exceptions_str = exception_f.read()
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except IOError:
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print "No exception file provided"
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# 3) Go through all the files and report violations if they are not exceptions
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consider_all_metrics(files_list, exceptions_str)
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if __name__ == '__main__':
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main()
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