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"""Reporter foundation for Coverage."""
import os
from coverage.codeunit import code_unit_factory
from coverage.misc import CoverageException, NoSource
class Reporter(object):
"""A base class for all reporters."""
def __init__(self, coverage, ignore_errors=False):
"""Create a reporter.
`coverage` is the coverage instance. `ignore_errors` controls how
skittish the reporter will be during file processing.
"""
self.coverage = coverage
self.ignore_errors = ignore_errors
# The code units to report on. Set by find_code_units.
self.code_units = []
# The directory into which to place the report, used by some derived
# classes.
self.directory = None
def find_code_units(self, morfs, omit_prefixes, include_prefixes):
"""Find the code units we'll report on.
`morfs` is a list of modules or filenames. `omit_prefixes` is a list
of prefixes to leave out of the list.
`omit_prefixes` is a list of prefixes. CodeUnits that match those prefixes
will be omitted from the list.
`include_prefixes` is a list of prefixes. Only CodeUnits that match those prefixes
will be included in the list.
You are required to pass at most one of `omit_prefixes` and `include_prefixes`.
"""
morfs = morfs or self.coverage.data.executed_files()
self.code_units = code_unit_factory(
morfs, self.coverage.file_locator, omit_prefixes, include_prefixes)
self.code_units.sort()
def report_files(self, report_fn, morfs, directory=None,
omit_prefixes=None, include_prefixes=None):
"""Run a reporting function on a number of morfs.
`report_fn` is called for each relative morf in `morfs`.
`omit_prefixes` is a list of prefixes. CodeUnits that match those prefixes
will be omitted from the list.
`include_prefixes` is a list of prefixes. Only CodeUnits that match those prefixes
will be included in the list.
You are required to pass at most one of `omit_prefixes` and `include_prefixes`.
"""
self.find_code_units(morfs, omit_prefixes, include_prefixes)
if not self.code_units:
raise CoverageException("No data to report.")
self.directory = directory
if self.directory and not os.path.exists(self.directory):
os.makedirs(self.directory)
for cu in self.code_units:
try:
report_fn(cu, self.coverage._analyze(cu))
except NoSource:
if not self.ignore_errors:
raise
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