forked from TheKevJames/coveralls-python
/
reporter.py
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/
reporter.py
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import logging
import os
from coverage import __version__
from coverage.misc import NoSource
from coverage.misc import NotPython
log = logging.getLogger('coveralls.reporter')
class CoverallReporter:
"""Custom coverage.py reporter for coveralls.io."""
def __init__(self, cov, conf, base_dir=None):
self.coverage = []
if base_dir:
self.base_dir = base_dir.replace(os.path.sep, '/')
if self.base_dir[-1] != '/':
self.base_dir += '/'
else:
self.base_dir = None
self.report(cov, conf)
def report5(self, cov):
# N.B. this method is 99% copied from the coverage source code;
# unfortunately, the coverage v5 style of `get_analysis_to_report`
# errors out entirely if any source file has issues -- which would be a
# breaking change for us. In the interest of backwards compatibility,
# I've copied their code here so we can maintain the same `coveralls`
# API regardless of which `coverage` version is being used.
#
# TODO: deprecate the relevant APIs so we can just use the coverage
# public API directly.
#
# from coverage.report import get_analysis_to_report
# try:
# for cu, analyzed in get_analysis_to_report(cov, None):
# self.parse_file(cu, analyzed)
# except NoSource:
# # Note that this behavior must necessarily change between
# # coverage<5 and coverage>=5, as we are no longer interweaving
# # with get_analysis_to_report (a single exception breaks the
# # whole loop)
# log.warning('No source for at least one file')
# except NotPython:
# # Note that this behavior must necessarily change between
# # coverage<5 and coverage>=5, as we are no longer interweaving
# # with get_analysis_to_report (a single exception breaks the
# # whole loop)
# log.warning('A source file is not python')
# except CoverageException as e:
# if str(e) != 'No data to report.':
# raise
from coverage.files import FnmatchMatcher, prep_patterns # pylint: disable=import-outside-toplevel
# get_analysis_to_report starts here; changes marked with TODOs
file_reporters = cov._get_file_reporters(None) # pylint: disable=W0212
config = cov.config
if config.report_include:
matcher = FnmatchMatcher(prep_patterns(config.report_include))
file_reporters = [fr for fr in file_reporters
if matcher.match(fr.filename)]
if config.report_omit:
matcher = FnmatchMatcher(prep_patterns(config.report_omit))
file_reporters = [fr for fr in file_reporters
if not matcher.match(fr.filename)]
# TODO: deprecate changes
# if not file_reporters:
# raise CoverageException("No data to report.")
for fr in sorted(file_reporters):
try:
analysis = cov._analyze(fr) # pylint: disable=W0212
except NoSource:
if not config.ignore_errors:
# TODO: deprecate changes
# raise
log.warning('No source for %s', fr.filename)
except NotPython:
# Only report errors for .py files, and only if we didn't
# explicitly suppress those errors.
# NotPython is only raised by PythonFileReporter, which has a
# should_be_python() method.
if fr.should_be_python():
if config.ignore_errors:
msg = "Couldn't parse Python file '{}'".format(
fr.filename)
cov._warn(msg, # pylint: disable=W0212
slug='couldnt-parse')
else:
# TODO: deprecate changes
# raise
log.warning('Source file is not python %s',
fr.filename)
else:
# TODO: deprecate changes (well, this one is fine /shrug)
# yield (fr, analysis)
self.parse_file(fr, analysis)
def report(self, cov, conf, morfs=None):
"""
Generate a part of json report for coveralls.
`morfs` is a list of modules or filenames.
`outfile` is a file object to write the json to.
"""
# pylint: disable=too-many-branches
try:
from coverage.report import Reporter # pylint: disable=import-outside-toplevel
self.reporter = Reporter(cov, conf)
except ImportError: # coverage >= 5.0
return self.report5(cov)
for cu in self.reporter.find_file_reporters(morfs):
try:
_fn = self.reporter.coverage._analyze # pylint: disable=W0212
analyzed = _fn(cu)
self.parse_file(cu, analyzed)
except NoSource:
if not self.reporter.config.ignore_errors:
log.warning('No source for %s', cu.filename)
except NotPython:
# Only report errors for .py files, and only if we didn't
# explicitly suppress those errors.
if (cu.should_be_python()
and not self.reporter.config.ignore_errors):
log.warning('Source file is not python %s', cu.filename)
return self.coverage
@staticmethod
def get_hits(line_num, analysis):
"""
Source file stats for each line.
* A positive integer if the line is covered, representing the number
of times the line is hit during the test suite.
* 0 if the line is not covered by the test suite.
* null to indicate the line is not relevant to code coverage (it may
be whitespace or a comment).
"""
if line_num in analysis.missing:
return 0
if line_num not in analysis.statements:
return None
return 1
@staticmethod
def get_arcs(analysis):
"""
Hit stats for each branch.
Returns a flat list where every four values represent a branch:
1. line-number
2. block-number (not used)
3. branch-number
4. hits (we only get 1/0 from coverage.py)
"""
if not analysis.has_arcs():
return None
if not hasattr(analysis, 'branch_lines'):
# N.B. switching to the public method analysis.missing_branch_arcs
# would work for half of what we need, but there doesn't seem to be
# an equivalent analysis.executed_branch_arcs
branch_lines = analysis._branch_lines() # pylint: disable=W0212
else:
branch_lines = analysis.branch_lines()
branches = []
for l1, l2 in analysis.arcs_executed():
if l1 in branch_lines:
branches.extend((l1, 0, abs(l2), 1))
for l1, l2 in analysis.arcs_missing():
if l1 in branch_lines:
branches.extend((l1, 0, abs(l2), 0))
return branches
def parse_file(self, cu, analysis):
"""Generate data for single file."""
filename = cu.relative_filename()
# ensure results are properly merged between platforms
posix_filename = filename.replace(os.path.sep, '/')
if self.base_dir and posix_filename.startswith(self.base_dir):
posix_filename = posix_filename[len(self.base_dir):]
source = analysis.file_reporter.source()
token_lines = analysis.file_reporter.source_token_lines()
coverage_lines = [self.get_hits(i, analysis)
for i, _ in enumerate(token_lines, 1)]
results = {
'name': posix_filename,
'source': source,
'coverage': coverage_lines,
}
branches = self.get_arcs(analysis)
if branches:
results['branches'] = branches
self.coverage.append(results)