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"""Core control stuff for coverage.py"""
import os, re, sys
from coverage.codeunit import code_unit_factory
from coverage.data import CoverageData
from coverage.files import FileLocator
from coverage.misc import format_lines, CoverageException
from coverage.summary import SummaryReporter
class coverage:
def __init__(self):
from coverage.collector import Collector
self.parallel_mode = False
self.exclude_re = ''
self.nesting = 0
self.cstack = []
self.xstack = []
self.file_locator = FileLocator()
self.collector = Collector(self.should_trace)
self.data = CoverageData()
# The default exclude pattern.
self.exclude('# *pragma[: ]*[nN][oO] *[cC][oO][vV][eE][rR]')
# Save coverage data when Python exits.
import atexit
atexit.register(self.save)
def should_trace(self, filename):
"""Decide whether to trace execution in `filename`
Returns a canonicalized filename if it should be traced, False if it
should not.
"""
if filename == '<string>':
# There's no point in ever tracing string executions, we can't do
# anything with the data later anyway.
return False
# TODO: flag: ignore std lib?
# TODO: ignore by module as well as file?
return self.file_locator.canonical_filename(filename)
def use_cache(self, usecache, cache_file=None):
self.data.usefile(usecache, cache_file)
def get_ready(self):
self.collector.reset()
self.data.read(parallel=self.parallel_mode)
def start(self):
self.get_ready()
if self.nesting == 0: #pragma: no cover
self.collector.start()
self.nesting += 1
def stop(self):
self.nesting -= 1
if self.nesting == 0: #pragma: no cover
self.collector.stop()
def erase(self):
self.get_ready()
self.collector.reset()
self.data.erase()
def exclude(self, regex):
if self.exclude_re:
self.exclude_re += "|"
self.exclude_re += "(" + regex + ")"
def begin_recursive(self):
#self.cstack.append(self.c)
self.xstack.append(self.exclude_re)
def end_recursive(self):
#self.c = self.cstack.pop()
self.exclude_re = self.xstack.pop()
def save(self):
self.group_collected_data()
self.data.write()
def combine(self):
"""Entry point for combining together parallel-mode coverage data."""
self.data.combine_parallel_data()
def group_collected_data(self):
"""Group the collected data by filename and reset the collector."""
self.data.add_raw_data(self.collector.data_points())
self.collector.reset()
# Backward compatibility with version 1.
def analysis(self, morf):
f, s, _, m, mf = self.analysis2(morf)
return f, s, m, mf
def analysis2(self, morf):
code_units = code_unit_factory(morf, self.file_locator)
return self.analyze(code_units[0])
def analyze(self, code_unit):
"""Analyze a single code unit.
Otherwise, return a tuple of (1) the canonical filename of the source
code for the module, (2) a list of lines of statements in the source
code, (3) a list of lines of excluded statements, (4) a list of lines
missing from execution, and (5), a readable string of missing lines.
"""
from coverage.analyzer import CodeAnalyzer
filename = code_unit.filename
ext = os.path.splitext(filename)[1]
source = None
if ext == '.pyc':
filename = filename[:-1]
ext = '.py'
if ext == '.py':
if not os.path.exists(filename):
source = self.file_locator.get_zip_data(filename)
if not source:
raise CoverageException(
"No source for code '%s'." % code_unit.filename
)
analyzer = CodeAnalyzer()
statements, excluded, line_map = analyzer.analyze_source(
text=source, filename=filename, exclude=self.exclude_re
)
self.group_collected_data()
# Identify missing statements.
missing = []
execed = self.data.executed_lines(filename)
for line in statements:
lines = line_map.get(line)
if lines:
for l in range(lines[0], lines[1]+1):
if l in execed:
break
else:
missing.append(line)
else:
if line not in execed:
missing.append(line)
return (filename, statements, excluded, missing,
format_lines(statements, missing))
# Programmatic entry point
def report(self, morfs, show_missing=True, ignore_errors=False, file=None):
reporter = SummaryReporter(self, show_missing, ignore_errors)
reporter.report(morfs, outfile=file)
# annotate(morfs, ignore_errors).
blank_re = re.compile(r"\s*(#|$)")
else_re = re.compile(r"\s*else\s*:\s*(#|$)")
def annotate(self, morfs, directory=None, ignore_errors=False, omit_prefixes=None):
morfs = morfs or self.data.executed_files()
code_units = code_unit_factory(morfs, self.file_locator, omit_prefixes)
for cu in code_units:
try:
filename, statements, excluded, missing, _ = self.analyze(cu)
self.annotate_file(filename, statements, excluded, missing, directory)
except KeyboardInterrupt:
raise
except:
if not ignore_errors:
raise
def annotate_file(self, filename, statements, excluded, missing, directory=None):
source = open(filename, 'r')
if directory:
dest_file = os.path.join(directory,
os.path.basename(filename)
+ ',cover')
else:
dest_file = filename + ',cover'
dest = open(dest_file, 'w')
lineno = 0
i = 0
j = 0
covered = True
while True:
line = source.readline()
if line == '':
break
lineno = lineno + 1
while i < len(statements) and statements[i] < lineno:
i = i + 1
while j < len(missing) and missing[j] < lineno:
j = j + 1
if i < len(statements) and statements[i] == lineno:
covered = j >= len(missing) or missing[j] > lineno
if self.blank_re.match(line):
dest.write(' ')
elif self.else_re.match(line):
# Special logic for lines containing only 'else:'.
if i >= len(statements) and j >= len(missing):
dest.write('! ')
elif i >= len(statements) or j >= len(missing):
dest.write('> ')
elif statements[i] == missing[j]:
dest.write('! ')
else:
dest.write('> ')
elif lineno in excluded:
dest.write('- ')
elif covered:
dest.write('> ')
else:
dest.write('! ')
dest.write(line)
source.close()
dest.close()
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