119 lines
4.1 KiB
Python
119 lines
4.1 KiB
Python
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import optparse
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import re
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import sys
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from optparse import OptionParser
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# the gcov report follows certain pattern. Each file will have two lines
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# of report, from which we can extract the file name, total lines and coverage
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# percentage.
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def parse_gcov_report(gcov_input):
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per_file_coverage = {}
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total_coverage = None
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for line in sys.stdin:
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line = line.strip()
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# --First line of the coverage report (with file name in it)?
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match_obj = re.match("^File '(.*)'$", line)
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if match_obj:
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# fetch the file name from the first line of the report.
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current_file = match_obj.group(1)
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continue
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# -- Second line of the file report (with coverage percentage)
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match_obj = re.match("^Lines executed:(.*)% of (.*)", line)
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if match_obj:
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coverage = float(match_obj.group(1))
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lines = int(match_obj.group(2))
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if current_file is not None:
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per_file_coverage[current_file] = (coverage, lines)
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current_file = None
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else:
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# If current_file is not set, we reach the last line of report,
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# which contains the summarized coverage percentage.
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total_coverage = (coverage, lines)
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continue
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# If the line's pattern doesn't fall into the above categories. We
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# can simply ignore them since they're either empty line or doesn't
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# find executable lines of the given file.
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current_file = None
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return per_file_coverage, total_coverage
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def get_option_parser():
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usage = "Parse the gcov output and generate more human-readable code " +\
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"coverage report."
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parser = OptionParser(usage)
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parser.add_option(
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"--interested-files", "-i",
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dest="filenames",
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help="Comma separated files names. if specified, we will display " +
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"the coverage report only for interested source files. " +
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"Otherwise we will display the coverage report for all " +
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"source files."
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)
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return parser
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def display_file_coverage(per_file_coverage, total_coverage):
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# To print out auto-adjustable column, we need to know the longest
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# length of file names.
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max_file_name_length = max(
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len(fname) for fname in per_file_coverage.keys()
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)
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# -- Print header
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# size of separator is determined by 3 column sizes:
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# file name, coverage percentage and lines.
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header_template = \
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"%" + str(max_file_name_length) + "s\t%s\t%s"
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separator = "-" * (max_file_name_length + 10 + 20)
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print header_template % ("Filename", "Coverage", "Lines")
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print separator
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# -- Print body
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# template for printing coverage report for each file.
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record_template = "%" + str(max_file_name_length) + "s\t%5.2f%%\t%10d"
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for fname, coverage_info in per_file_coverage.items():
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coverage, lines = coverage_info
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print record_template % (fname, coverage, lines)
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# -- Print footer
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if total_coverage:
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print separator
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print record_template % ("Total", total_coverage[0], total_coverage[1])
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def report_coverage():
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parser = get_option_parser()
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(options, args) = parser.parse_args()
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interested_files = set()
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if options.filenames is not None:
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interested_files = set(f.strip() for f in options.filenames.split(','))
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# To make things simple, right now we only read gcov report from the input
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per_file_coverage, total_coverage = parse_gcov_report(sys.stdin)
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# Check if we need to display coverage info for interested files.
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if len(interested_files):
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per_file_coverage = dict(
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(fname, per_file_coverage[fname]) for fname in interested_files
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if fname in per_file_coverage
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)
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# If we only interested in several files, it makes no sense to report
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# the total_coverage
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total_coverage = None
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if not len(per_file_coverage):
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print >> sys.stderr, "Cannot find coverage info for the given files."
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return
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display_file_coverage(per_file_coverage, total_coverage)
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if __name__ == "__main__":
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report_coverage()
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