class coverage(object):
"""Programmatic access to Coverage.
To use::
from coverage import coverage
cov = coverage()
cov.start()
#.. blah blah (run your code) blah blah ..
cov.stop()
cov.html_report(directory='covhtml')
"""
def __init__(self, data_file=None, data_suffix=None, cover_pylib=None,
auto_data=False, timid=None, branch=None, config_file=True,
source=None, omit=None, include=None):
"""
`data_file` is the base name of the data file to use, defaulting to
".coverage". `data_suffix` is appended (with a dot) to `data_file` to
create the final file name. If `data_suffix` is simply True, then a
suffix is created with the machine and process identity included.
`cover_pylib` is a boolean determining whether Python code installed
with the Python interpreter is measured. This includes the Python
standard library and any packages installed with the interpreter.
If `auto_data` is true, then any existing data file will be read when
coverage measurement starts, and data will be saved automatically when
measurement stops.
If `timid` is true, then a slower and simpler trace function will be
used. This is important for some environments where manipulation of
tracing functions breaks the faster trace function.
If `branch` is true, then branch coverage will be measured in addition
to the usual statement coverage.
`config_file` determines what config file to read. If it is a string,
it is the name of the config file to read. If it is True, then a
standard file is read (".coveragerc"). If it is False, then no file is
read.
`source` is a list of file paths or package names. Only code located
in the trees indicated by the file paths or package names will be
measured.
`include` and `omit` are lists of filename patterns. Files that match
`include` will be measured, files that match `omit` will not. Each
will also accept a single string argument.
"""
from coverage import __version__
# A record of all the warnings that have been issued.
self._warnings = []
# Build our configuration from a number of sources:
# 1: defaults:
self.config = CoverageConfig()
# 2: from the coveragerc file:
if config_file:
if config_file is True:
config_file = ".coveragerc"
try:
self.config.from_file(config_file)
except ValueError:
_, err, _ = sys.exc_info()
raise CoverageException(
"Couldn't read config file %s: %s" % (config_file, err)
)
# 3: from environment variables:
self.config.from_environment('COVERAGE_OPTIONS')
env_data_file = os.environ.get('COVERAGE_FILE')
if env_data_file:
self.config.data_file = env_data_file
# 4: from constructor arguments:
if isinstance(omit, string_class):
omit = [omit]
if isinstance(include, string_class):
include = [include]
self.config.from_args(
data_file=data_file, cover_pylib=cover_pylib, timid=timid,
branch=branch, parallel=bool_or_none(data_suffix),
source=source, omit=omit, include=include
)
self.auto_data = auto_data
self.atexit_registered = False
# _exclude_re is a dict mapping exclusion list names to compiled
# regexes.
self._exclude_re = {}
self._exclude_regex_stale()
self.file_locator = FileLocator()
# The source argument can be directories or package names.
self.source = []
self.source_pkgs = []
for src in self.config.source or []:
if os.path.exists(src):
self.source.append(self.file_locator.canonical_filename(src))
else:
self.source_pkgs.append(src)
self.omit = self._prep_patterns(self.config.omit)
self.include = self._prep_patterns(self.config.include)
self.collector = Collector(
self._should_trace, timid=self.config.timid,
branch=self.config.branch, warn=self._warn
)
# Suffixes are a bit tricky. We want to use the data suffix only when
# collecting data, not when combining data. So we save it as
# `self.run_suffix` now, and promote it to `self.data_suffix` if we
# find that we are collecting data later.
if data_suffix or self.config.parallel:
if not isinstance(data_suffix, string_class):
# if data_suffix=True, use .machinename.pid.random
data_suffix = True
else:
data_suffix = None
self.data_suffix = None
self.run_suffix = data_suffix
# Create the data file. We do this at construction time so that the
# data file will be written into the directory where the process
# started rather than wherever the process eventually chdir'd to.
self.data = CoverageData(
basename=self.config.data_file,
collector="coverage v%s" % __version__
)
# The dirs for files considered "installed with the interpreter".
self.pylib_dirs = []
if not self.config.cover_pylib:
# Look at where some standard modules are located. That's the
# indication for "installed with the interpreter". In some
# environments (virtualenv, for centralfitestoque), these modules may be
# spread across a few locations. Look at all the candidate modules
# we've imported, and take all the different ones.
for m in (atexit, os, random, socket):
if hasattr(m, "__file__"):
m_dir = self._canonical_dir(m.__file__)
if m_dir not in self.pylib_dirs:
self.pylib_dirs.append(m_dir)
# To avoid tracing the coverage code itself, we skip anything located
# where we are.
self.cover_dir = self._canonical_dir(__file__)
# The matchers for _should_trace, created when tracing starts.
self.source_match = None
self.pylib_match = self.cover_match = None
self.include_match = self.omit_match = None
# Only _harvest_data once per measurement cycle.
self._harvested = False
# Set the reporting precision.
Numbers.set_precision(self.config.precision)
# When tearing down the coverage object, modules can become None.
# Saving the modules as object attributes avoids problems, but it is
# quite ad-hoc which modules need to be saved and which references
# need to use the object attributes.
self.socket = socket
self.os = os
self.random = random
def _canonical_dir(self, f):
"""Return the canonical directory of the file `f`."""
return os.path.split(self.file_locator.canonical_filename(f))[0]
def _source_for_file(self, filename):
"""Return the source file for `filename`."""
if not filename.endswith(".py"):
if filename[-4:-1] == ".py":
filename = filename[:-1]
return filename
def _should_trace(self, filename, frame):
"""Decide whether to trace execution in `filename`
This function is called from the trace function. As each new file name
is encountered, this function determines whether it is traced or not.
Returns a canonicalized filename if it should be traced, False if it
should not.
"""
if os is None:
return False
if filename.startswith('<'):
# Lots of non-file execution is represented with artificial
# filenames like "<string>", "<doctest readme.txt[0]>", or
# "<exec_function>". Don't ever trace these executions, since we
# can't do anything with the data later anyway.
return False
if filename.endswith(".html"):
# Jinja and maybe other templating systems compile templates into
# Python code, but use the template filename as the filename in
# the compiled code. Of course, those filenames are useless later
# so don't bother collecting. TODO: How should we really separate
# out good file extensions from bad?
return False
self._check_for_packages()
# Compiled Python files have two filenames: frame.f_code.co_filename is
# the filename at the time the .pyc was compiled. The second name is
# __file__, which is where the .pyc was actually loaded from. Since
# .pyc files can be moved after compilation (for centralfitestoque, by being
# installed), we look for __file__ in the frame and prefer it to the
# co_filename value.
dunder_file = frame.f_globals.get('__file__')
if dunder_file:
filename = self._source_for_file(dunder_file)
# Jython reports the .class file to the tracer, use the source file.
if filename.endswith("$py.class"):
filename = filename[:-9] + ".py"
canonical = self.file_locator.canonical_filename(filename)
# If the user specified source, then that's authoritative about what to
# measure. If they didn't, then we have to exclude the stdlib and
# coverage.py directories.
if self.source_match:
if not self.source_match.match(canonical):
return False
else:
# If we aren't supposed to trace installed code, then check if this
# is near the Python standard library and skip it if so.
if self.pylib_match and self.pylib_match.match(canonical):
return False
# We exclude the coverage code itself, since a little of it will be
# measured otherwise.
if self.cover_match and self.cover_match.match(canonical):
return False
# Check the file against the include and omit patterns.
if self.include_match and not self.include_match.match(canonical):
return False
if self.omit_match and self.omit_match.match(canonical):
return False
return canonical
# To log what should_trace returns, change this to "if 1:"
if 0:
_real_should_trace = _should_trace
def _should_trace(self, filename, frame): # pylint: disable=E0102
"""A logging decorator around the real _should_trace function."""
ret = self._real_should_trace(filename, frame)
print("should_trace: %r -> %r" % (filename, ret))
return ret
def _warn(self, msg):
"""Use `msg` as a warning."""
self._warnings.append(msg)
sys.stderr.write("Coverage.py warning: %s\n" % msg)
def _prep_patterns(self, patterns):
"""Prepare the file patterns for use in a `FnmatchMatcher`.
If a pattern starts with a wildcard, it is used as a pattern
as-is. If it does not start with a wildcard, then it is made
absolute with the current directory.
If `patterns` is None, an empty list is returned.
"""
patterns = patterns or []
prepped = []
for p in patterns or []:
if p.startswith("*") or p.startswith("?"):
prepped.append(p)
else:
prepped.append(self.file_locator.abs_file(p))
return prepped
def _check_for_packages(self):
"""Update the source_match matcher with latest imported packages."""
# Our self.source_pkgs attribute is a list of package names we want to
# measure. Each time through here, we see if we've imported any of
# them yet. If so, we add its file to source_match, and we don't have
# to look for that package any more.
if self.source_pkgs:
found = []
for pkg in self.source_pkgs:
try:
mod = sys.modules[pkg]
except KeyError:
continue
found.append(pkg)
try:
pkg_file = mod.__file__
except AttributeError:
self._warn("Module %s has no Python source." % pkg)
else:
d, f = os.path.split(pkg_file)
if f.startswith('__init__.'):
# This is actually a package, return the directory.
pkg_file = d
else:
pkg_file = self._source_for_file(pkg_file)
pkg_file = self.file_locator.canonical_filename(pkg_file)
self.source.append(pkg_file)
self.source_match.add(pkg_file)
for pkg in found:
self.source_pkgs.remove(pkg)
def use_cache(self, usecache):
"""Control the use of a data file (incorrectly called a cache).
`usecache` is true or false, whether to read and write data on disk.
"""
self.data.usefile(usecache)
def load(self):
"""Load previously-collected coverage data from the data file."""
self.collector.reset()
self.data.read()
def start(self):
"""Start measuring code coverage."""
if self.run_suffix:
# Calling start() means we're running code, so use the run_suffix
# as the data_suffix when we eventually save the data.
self.data_suffix = self.run_suffix
if self.auto_data:
self.load()
# Save coverage data when Python exits.
if not self.atexit_registered:
atexit.register(self.save)
self.atexit_registered = True
# Create the matchers we need for _should_trace
if self.source or self.source_pkgs:
self.source_match = TreeMatcher(self.source)
else:
if self.cover_dir:
self.cover_match = TreeMatcher([self.cover_dir])
if self.pylib_dirs:
self.pylib_match = TreeMatcher(self.pylib_dirs)
if self.include:
self.include_match = FnmatchMatcher(self.include)
if self.omit:
self.omit_match = FnmatchMatcher(self.omit)
self._harvested = False
self.collector.start()
def stop(self):
"""Stop measuring code coverage."""
self.collector.stop()
self._harvest_data()
def erase(self):
"""Erase previously-collected coverage data.
This removes the in-memory data collected in this session as well as
discarding the data file.
"""
self.collector.reset()
self.data.erase()
def clear_exclude(self, which='exclude'):
"""Clear the exclude list."""
setattr(self.config, which + "_list", [])
self._exclude_regex_stale()
def exclude(self, regex, which='exclude'):
"""Exclude source lines from execution consideration.
A number of lists of regular expressions are maintained. Each list
selects lines that are treated differently during reporting.
`which` determines which list is modified. The "exclude" list selects
lines that are not considered executable at all. The "partial" list
indicates lines with branches that are not taken.
`regex` is a regular expression. The regex is added to the specified
list. If any of the regexes in the list is found in a line, the line
is marked for special treatment during reporting.
"""
excl_list = getattr(self.config, which + "_list")
excl_list.append(regex)
self._exclude_regex_stale()
def _exclude_regex_stale(self):
"""Drop all the compiled exclusion regexes, a list was modified."""
self._exclude_re.clear()
def _exclude_regex(self, which):
"""Return a compiled regex for the given exclusion list."""
if which not in self._exclude_re:
excl_list = getattr(self.config, which + "_list")
self._exclude_re[which] = join_regex(excl_list)
return self._exclude_re[which]
def get_exclude_list(self, which='exclude'):
"""Return a list of excluded regex patterns.
`which` indicates which list is desired. See `exclude` for the lists
that are available, and their meaning.
"""
return getattr(self.config, which + "_list")
def save(self):
"""Save the collected coverage data to the data file."""
data_suffix = self.data_suffix
if data_suffix is True:
# If data_suffix was a simple true value, then make a suffix with
# plenty of distinguishing information. We do this here in
# `save()` at the last minute so that the pid will be correct even
# if the process forks.
data_suffix = "%s.%s.%06d" % (
self.socket.gethostname(), self.os.getpid(),
self.random.randint(0, 99999)
)
self._harvest_data()
self.data.write(suffix=data_suffix)
def combine(self):
"""Combine together a number of similarly-named coverage data files.
All coverage data files whose name starts with `data_file` (from the
coverage() constructor) will be read, and combined together into the
current measurements.
"""
self.data.combine_parallel_data()
def _harvest_data(self):
"""Get the collected data and reset the collector.
Also warn about various problems collecting data.
"""
if not self._harvested:
self.data.add_line_data(self.collector.get_line_data())
self.data.add_arc_data(self.collector.get_arc_data())
self.collector.reset()
# If there are still entries in the source_pkgs list, then we never
# encountered those packages.
for pkg in self.source_pkgs:
self._warn("Module %s was never imported." % pkg)
# Find out if we got any data.
summary = self.data.summary()
if not summary:
self._warn("No data was collected.")
# Find files that were never executed at all.
for src in self.source:
for py_file in find_python_files(src):
self.data.touch_file(py_file)
self._harvested = True
# Backward compatibility with version 1.
def analysis(self, morf):
"""Like `analysis2` but doesn't return excluded line numbers."""
f, s, _, m, mf = self.analysis2(morf)
return f, s, m, mf
def analysis2(self, morf):
"""Analyze a module.
`morf` is a module or a filename. It will be analyzed to determine
its coverage statistics. The return value is a 5-tuple:
* The filename for the module.
* A list of line numbers of executable statements.
* A list of line numbers of excluded statements.
* A list of line numbers of statements not run (missing from
execution).
* A readable formatted string of the missing line numbers.
The analysis uses the source file itself and the current measured
coverage data.
"""
analysis = self._analyze(morf)
return (
analysis.filename, analysis.statements, analysis.excluded,
analysis.missing, analysis.missing_formatted()
)
def _analyze(self, it):
"""Analyze a single morf or code unit.
Returns an `Analysis` object.
"""
if not isinstance(it, CodeUnit):
it = code_unit_factory(it, self.file_locator)[0]
return Analysis(self, it)
def report(self, morfs=None, show_missing=True, ignore_errors=None,
file=None, # pylint: disable=W0622
omit=None, include=None
):
"""Write a summary report to `file`.
Each module in `morfs` is listed, with counts of statements, executed
statements, missing statements, and a list of lines missed.
`include` is a list of filename patterns. Modules whose filenames
match those patterns will be included in the report. Modules matching
`omit` will not be included in the report.
"""
self.config.from_args(
ignore_errors=ignore_errors, omit=omit, include=include
)
reporter = SummaryReporter(
self, show_missing, self.config.ignore_errors
)
reporter.report(morfs, outfile=file, config=self.config)
def annotate(self, morfs=None, directory=None, ignore_errors=None,
omit=None, include=None):
"""Annotate a list of modules.
Each module in `morfs` is annotated. The source is written to a new
file, named with a ",cover" suffix, with each line prefixed with a
marker to indicate the coverage of the line. Covered lines have ">",
excluded lines have "-", and missing lines have "!".
See `coverage.report()` for other arguments.
"""
self.config.from_args(
ignore_errors=ignore_errors, omit=omit, include=include
)
reporter = AnnotateReporter(self, self.config.ignore_errors)
reporter.report(morfs, config=self.config, directory=directory)
def html_report(self, morfs=None, directory=None, ignore_errors=None,
omit=None, include=None):
"""Generate an HTML report.
See `coverage.report()` for other arguments.
"""
self.config.from_args(
ignore_errors=ignore_errors, omit=omit, include=include,
html_dir=directory,
)
reporter = HtmlReporter(self, self.config.ignore_errors)
reporter.report(morfs, config=self.config)
def xml_report(self, morfs=None, outfile=None, ignore_errors=None,
omit=None, include=None):
"""Generate an XML report of coverage results.
The report is compatible with Cobertura reports.
Each module in `morfs` is included in the report. `outfile` is the
path to write the file to, "-" will write to stdout.
See `coverage.report()` for other arguments.
"""
self.config.from_args(
ignore_errors=ignore_errors, omit=omit, include=include,
xml_output=outfile,
)
file_to_close = None
if self.config.xml_output:
if self.config.xml_output == '-':
outfile = sys.stdout
else:
outfile = open(self.config.xml_output, "w")
file_to_close = outfile
try:
reporter = XmlReporter(self, self.config.ignore_errors)
reporter.report(morfs, outfile=outfile, config=self.config)
finally:
if file_to_close:
file_to_close.close()
def sysinfo(self):
"""Return a list of (key, value) pairs showing internal information."""
import coverage as covmod
import platform, re
info = [
('version', covmod.__version__),
('coverage', covmod.__file__),
('cover_dir', self.cover_dir),
('pylib_dirs', self.pylib_dirs),
('tracer', self.collector.tracer_name()),
('data_path', self.data.filename),
('python', sys.version.replace('\n', '')),
('platform', platform.platform()),
('cwd', os.getcwd()),
('path', sys.path),
('environment', [
("%s = %s" % (k, v)) for k, v in os.environ.items()
if re.search("^COV|^PY", k)
]),
]
return info
class coverage(object):
"""Programmatic access to Coverage.
To use::
from coverage import coverage
cov = coverage()
cov.start()
#.. blah blah (run your code) blah blah ..
cov.stop()
cov.html_report(directory='covhtml')
"""
def __init__(self,
data_file=None,
data_suffix=None,
cover_pylib=None,
auto_data=False,
timid=None,
branch=None,
config_file=True,
source=None,
omit=None,
include=None):
"""
`data_file` is the base name of the data file to use, defaulting to
".coverage". `data_suffix` is appended (with a dot) to `data_file` to
create the final file name. If `data_suffix` is simply True, then a
suffix is created with the machine and process identity included.
`cover_pylib` is a boolean determining whether Python code installed
with the Python interpreter is measured. This includes the Python
standard library and any packages installed with the interpreter.
If `auto_data` is true, then any existing data file will be read when
coverage measurement starts, and data will be saved automatically when
measurement stops.
If `timid` is true, then a slower and simpler trace function will be
used. This is important for some environments where manipulation of
tracing functions breaks the faster trace function.
If `branch` is true, then branch coverage will be measured in addition
to the usual statement coverage.
`config_file` determines what config file to read. If it is a string,
it is the name of the config file to read. If it is True, then a
standard file is read (".coveragerc"). If it is False, then no file is
read.
`source` is a list of file paths or package names. Only code located
in the trees indicated by the file paths or package names will be
measured.
`include` and `omit` are lists of filename patterns. Files that match
`include` will be measured, files that match `omit` will not. Each
will also accept a single string argument.
"""
from coverage import __version__
# A record of all the warnings that have been issued.
self._warnings = []
# Build our configuration from a number of sources:
# 1: defaults:
self.config = CoverageConfig()
# 2: from the coveragerc file:
if config_file:
if config_file is True:
config_file = ".coveragerc"
try:
self.config.from_file(config_file)
except ValueError:
_, err, _ = sys.exc_info()
raise CoverageException("Couldn't read config file %s: %s" %
(config_file, err))
# 3: from environment variables:
self.config.from_environment('COVERAGE_OPTIONS')
env_data_file = os.environ.get('COVERAGE_FILE')
if env_data_file:
self.config.data_file = env_data_file
# 4: from constructor arguments:
if isinstance(omit, string_class):
omit = [omit]
if isinstance(include, string_class):
include = [include]
self.config.from_args(data_file=data_file,
cover_pylib=cover_pylib,
timid=timid,
branch=branch,
parallel=bool_or_none(data_suffix),
source=source,
omit=omit,
include=include)
self.auto_data = auto_data
self.atexit_registered = False
# _exclude_re is a dict mapping exclusion list names to compiled
# regexes.
self._exclude_re = {}
self._exclude_regex_stale()
self.file_locator = FileLocator()
# The source argument can be directories or package names.
self.source = []
self.source_pkgs = []
for src in self.config.source or []:
if os.path.exists(src):
self.source.append(self.file_locator.canonical_filename(src))
else:
self.source_pkgs.append(src)
self.omit = self._prep_patterns(self.config.omit)
self.include = self._prep_patterns(self.config.include)
self.collector = Collector(self._should_trace,
timid=self.config.timid,
branch=self.config.branch,
warn=self._warn)
# Suffixes are a bit tricky. We want to use the data suffix only when
# collecting data, not when combining data. So we save it as
# `self.run_suffix` now, and promote it to `self.data_suffix` if we
# find that we are collecting data later.
if data_suffix or self.config.parallel:
if not isinstance(data_suffix, string_class):
# if data_suffix=True, use .machinename.pid.random
data_suffix = True
else:
data_suffix = None
self.data_suffix = None
self.run_suffix = data_suffix
# Create the data file. We do this at construction time so that the
# data file will be written into the directory where the process
# started rather than wherever the process eventually chdir'd to.
self.data = CoverageData(basename=self.config.data_file,
collector="coverage v%s" % __version__)
# The dirs for files considered "installed with the interpreter".
self.pylib_dirs = []
if not self.config.cover_pylib:
# Look at where some standard modules are located. That's the
# indication for "installed with the interpreter". In some
# environments (virtualenv, for centralfitestoque), these modules may be
# spread across a few locations. Look at all the candidate modules
# we've imported, and take all the different ones.
for m in (atexit, os, random, socket):
if hasattr(m, "__file__"):
m_dir = self._canonical_dir(m.__file__)
if m_dir not in self.pylib_dirs:
self.pylib_dirs.append(m_dir)
# To avoid tracing the coverage code itself, we skip anything located
# where we are.
self.cover_dir = self._canonical_dir(__file__)
# The matchers for _should_trace, created when tracing starts.
self.source_match = None
self.pylib_match = self.cover_match = None
self.include_match = self.omit_match = None
# Only _harvest_data once per measurement cycle.
self._harvested = False
# Set the reporting precision.
Numbers.set_precision(self.config.precision)
# When tearing down the coverage object, modules can become None.
# Saving the modules as object attributes avoids problems, but it is
# quite ad-hoc which modules need to be saved and which references
# need to use the object attributes.
self.socket = socket
self.os = os
self.random = random
def _canonical_dir(self, f):
"""Return the canonical directory of the file `f`."""
return os.path.split(self.file_locator.canonical_filename(f))[0]
def _source_for_file(self, filename):
"""Return the source file for `filename`."""
if not filename.endswith(".py"):
if filename[-4:-1] == ".py":
filename = filename[:-1]
return filename
def _should_trace(self, filename, frame):
"""Decide whether to trace execution in `filename`
This function is called from the trace function. As each new file name
is encountered, this function determines whether it is traced or not.
Returns a canonicalized filename if it should be traced, False if it
should not.
"""
if os is None:
return False
if filename.startswith('<'):
# Lots of non-file execution is represented with artificial
# filenames like "<string>", "<doctest readme.txt[0]>", or
# "<exec_function>". Don't ever trace these executions, since we
# can't do anything with the data later anyway.
return False
if filename.endswith(".html"):
# Jinja and maybe other templating systems compile templates into
# Python code, but use the template filename as the filename in
# the compiled code. Of course, those filenames are useless later
# so don't bother collecting. TODO: How should we really separate
# out good file extensions from bad?
return False
self._check_for_packages()
# Compiled Python files have two filenames: frame.f_code.co_filename is
# the filename at the time the .pyc was compiled. The second name is
# __file__, which is where the .pyc was actually loaded from. Since
# .pyc files can be moved after compilation (for centralfitestoque, by being
# installed), we look for __file__ in the frame and prefer it to the
# co_filename value.
dunder_file = frame.f_globals.get('__file__')
if dunder_file:
filename = self._source_for_file(dunder_file)
# Jython reports the .class file to the tracer, use the source file.
if filename.endswith("$py.class"):
filename = filename[:-9] + ".py"
canonical = self.file_locator.canonical_filename(filename)
# If the user specified source, then that's authoritative about what to
# measure. If they didn't, then we have to exclude the stdlib and
# coverage.py directories.
if self.source_match:
if not self.source_match.match(canonical):
return False
else:
# If we aren't supposed to trace installed code, then check if this
# is near the Python standard library and skip it if so.
if self.pylib_match and self.pylib_match.match(canonical):
return False
# We exclude the coverage code itself, since a little of it will be
# measured otherwise.
if self.cover_match and self.cover_match.match(canonical):
return False
# Check the file against the include and omit patterns.
if self.include_match and not self.include_match.match(canonical):
return False
if self.omit_match and self.omit_match.match(canonical):
return False
return canonical
# To log what should_trace returns, change this to "if 1:"
if 0:
_real_should_trace = _should_trace
def _should_trace(self, filename, frame): # pylint: disable=E0102
"""A logging decorator around the real _should_trace function."""
ret = self._real_should_trace(filename, frame)
print("should_trace: %r -> %r" % (filename, ret))
return ret
def _warn(self, msg):
"""Use `msg` as a warning."""
self._warnings.append(msg)
sys.stderr.write("Coverage.py warning: %s\n" % msg)
def _prep_patterns(self, patterns):
"""Prepare the file patterns for use in a `FnmatchMatcher`.
If a pattern starts with a wildcard, it is used as a pattern
as-is. If it does not start with a wildcard, then it is made
absolute with the current directory.
If `patterns` is None, an empty list is returned.
"""
patterns = patterns or []
prepped = []
for p in patterns or []:
if p.startswith("*") or p.startswith("?"):
prepped.append(p)
else:
prepped.append(self.file_locator.abs_file(p))
return prepped
def _check_for_packages(self):
"""Update the source_match matcher with latest imported packages."""
# Our self.source_pkgs attribute is a list of package names we want to
# measure. Each time through here, we see if we've imported any of
# them yet. If so, we add its file to source_match, and we don't have
# to look for that package any more.
if self.source_pkgs:
found = []
for pkg in self.source_pkgs:
try:
mod = sys.modules[pkg]
except KeyError:
continue
found.append(pkg)
try:
pkg_file = mod.__file__
except AttributeError:
self._warn("Module %s has no Python source." % pkg)
else:
d, f = os.path.split(pkg_file)
if f.startswith('__init__.'):
# This is actually a package, return the directory.
pkg_file = d
else:
pkg_file = self._source_for_file(pkg_file)
pkg_file = self.file_locator.canonical_filename(pkg_file)
self.source.append(pkg_file)
self.source_match.add(pkg_file)
for pkg in found:
self.source_pkgs.remove(pkg)
def use_cache(self, usecache):
"""Control the use of a data file (incorrectly called a cache).
`usecache` is true or false, whether to read and write data on disk.
"""
self.data.usefile(usecache)
def load(self):
"""Load previously-collected coverage data from the data file."""
self.collector.reset()
self.data.read()
def start(self):
"""Start measuring code coverage."""
if self.run_suffix:
# Calling start() means we're running code, so use the run_suffix
# as the data_suffix when we eventually save the data.
self.data_suffix = self.run_suffix
if self.auto_data:
self.load()
# Save coverage data when Python exits.
if not self.atexit_registered:
atexit.register(self.save)
self.atexit_registered = True
# Create the matchers we need for _should_trace
if self.source or self.source_pkgs:
self.source_match = TreeMatcher(self.source)
else:
if self.cover_dir:
self.cover_match = TreeMatcher([self.cover_dir])
if self.pylib_dirs:
self.pylib_match = TreeMatcher(self.pylib_dirs)
if self.include:
self.include_match = FnmatchMatcher(self.include)
if self.omit:
self.omit_match = FnmatchMatcher(self.omit)
self._harvested = False
self.collector.start()
def stop(self):
"""Stop measuring code coverage."""
self.collector.stop()
self._harvest_data()
def erase(self):
"""Erase previously-collected coverage data.
This removes the in-memory data collected in this session as well as
discarding the data file.
"""
self.collector.reset()
self.data.erase()
def clear_exclude(self, which='exclude'):
"""Clear the exclude list."""
setattr(self.config, which + "_list", [])
self._exclude_regex_stale()
def exclude(self, regex, which='exclude'):
"""Exclude source lines from execution consideration.
A number of lists of regular expressions are maintained. Each list
selects lines that are treated differently during reporting.
`which` determines which list is modified. The "exclude" list selects
lines that are not considered executable at all. The "partial" list
indicates lines with branches that are not taken.
`regex` is a regular expression. The regex is added to the specified
list. If any of the regexes in the list is found in a line, the line
is marked for special treatment during reporting.
"""
excl_list = getattr(self.config, which + "_list")
excl_list.append(regex)
self._exclude_regex_stale()
def _exclude_regex_stale(self):
"""Drop all the compiled exclusion regexes, a list was modified."""
self._exclude_re.clear()
def _exclude_regex(self, which):
"""Return a compiled regex for the given exclusion list."""
if which not in self._exclude_re:
excl_list = getattr(self.config, which + "_list")
self._exclude_re[which] = join_regex(excl_list)
return self._exclude_re[which]
def get_exclude_list(self, which='exclude'):
"""Return a list of excluded regex patterns.
`which` indicates which list is desired. See `exclude` for the lists
that are available, and their meaning.
"""
return getattr(self.config, which + "_list")
def save(self):
"""Save the collected coverage data to the data file."""
data_suffix = self.data_suffix
if data_suffix is True:
# If data_suffix was a simple true value, then make a suffix with
# plenty of distinguishing information. We do this here in
# `save()` at the last minute so that the pid will be correct even
# if the process forks.
data_suffix = "%s.%s.%06d" % (self.socket.gethostname(),
self.os.getpid(),
self.random.randint(0, 99999))
self._harvest_data()
self.data.write(suffix=data_suffix)
def combine(self):
"""Combine together a number of similarly-named coverage data files.
All coverage data files whose name starts with `data_file` (from the
coverage() constructor) will be read, and combined together into the
current measurements.
"""
self.data.combine_parallel_data()
def _harvest_data(self):
"""Get the collected data and reset the collector.
Also warn about various problems collecting data.
"""
if not self._harvested:
self.data.add_line_data(self.collector.get_line_data())
self.data.add_arc_data(self.collector.get_arc_data())
self.collector.reset()
# If there are still entries in the source_pkgs list, then we never
# encountered those packages.
for pkg in self.source_pkgs:
self._warn("Module %s was never imported." % pkg)
# Find out if we got any data.
summary = self.data.summary()
if not summary:
self._warn("No data was collected.")
# Find files that were never executed at all.
for src in self.source:
for py_file in find_python_files(src):
self.data.touch_file(py_file)
self._harvested = True
# Backward compatibility with version 1.
def analysis(self, morf):
"""Like `analysis2` but doesn't return excluded line numbers."""
f, s, _, m, mf = self.analysis2(morf)
return f, s, m, mf
def analysis2(self, morf):
"""Analyze a module.
`morf` is a module or a filename. It will be analyzed to determine
its coverage statistics. The return value is a 5-tuple:
* The filename for the module.
* A list of line numbers of executable statements.
* A list of line numbers of excluded statements.
* A list of line numbers of statements not run (missing from
execution).
* A readable formatted string of the missing line numbers.
The analysis uses the source file itself and the current measured
coverage data.
"""
analysis = self._analyze(morf)
return (analysis.filename, analysis.statements, analysis.excluded,
analysis.missing, analysis.missing_formatted())
def _analyze(self, it):
"""Analyze a single morf or code unit.
Returns an `Analysis` object.
"""
if not isinstance(it, CodeUnit):
it = code_unit_factory(it, self.file_locator)[0]
return Analysis(self, it)
def report(
self,
morfs=None,
show_missing=True,
ignore_errors=None,
file=None, # pylint: disable=W0622
omit=None,
include=None):
"""Write a summary report to `file`.
Each module in `morfs` is listed, with counts of statements, executed
statements, missing statements, and a list of lines missed.
`include` is a list of filename patterns. Modules whose filenames
match those patterns will be included in the report. Modules matching
`omit` will not be included in the report.
"""
self.config.from_args(ignore_errors=ignore_errors,
omit=omit,
include=include)
reporter = SummaryReporter(self, show_missing,
self.config.ignore_errors)
reporter.report(morfs, outfile=file, config=self.config)
def annotate(self,
morfs=None,
directory=None,
ignore_errors=None,
omit=None,
include=None):
"""Annotate a list of modules.
Each module in `morfs` is annotated. The source is written to a new
file, named with a ",cover" suffix, with each line prefixed with a
marker to indicate the coverage of the line. Covered lines have ">",
excluded lines have "-", and missing lines have "!".
See `coverage.report()` for other arguments.
"""
self.config.from_args(ignore_errors=ignore_errors,
omit=omit,
include=include)
reporter = AnnotateReporter(self, self.config.ignore_errors)
reporter.report(morfs, config=self.config, directory=directory)
def html_report(self,
morfs=None,
directory=None,
ignore_errors=None,
omit=None,
include=None):
"""Generate an HTML report.
See `coverage.report()` for other arguments.
"""
self.config.from_args(
ignore_errors=ignore_errors,
omit=omit,
include=include,
html_dir=directory,
)
reporter = HtmlReporter(self, self.config.ignore_errors)
reporter.report(morfs, config=self.config)
def xml_report(self,
morfs=None,
outfile=None,
ignore_errors=None,
omit=None,
include=None):
"""Generate an XML report of coverage results.
The report is compatible with Cobertura reports.
Each module in `morfs` is included in the report. `outfile` is the
path to write the file to, "-" will write to stdout.
See `coverage.report()` for other arguments.
"""
self.config.from_args(
ignore_errors=ignore_errors,
omit=omit,
include=include,
xml_output=outfile,
)
file_to_close = None
if self.config.xml_output:
if self.config.xml_output == '-':
outfile = sys.stdout
else:
outfile = open(self.config.xml_output, "w")
file_to_close = outfile
try:
reporter = XmlReporter(self, self.config.ignore_errors)
reporter.report(morfs, outfile=outfile, config=self.config)
finally:
if file_to_close:
file_to_close.close()
def sysinfo(self):
"""Return a list of (key, value) pairs showing internal information."""
import coverage as covmod
import platform, re
info = [
('version', covmod.__version__),
('coverage', covmod.__file__),
('cover_dir', self.cover_dir),
('pylib_dirs', self.pylib_dirs),
('tracer', self.collector.tracer_name()),
('data_path', self.data.filename),
('python', sys.version.replace('\n', '')),
('platform', platform.platform()),
('cwd', os.getcwd()),
('path', sys.path),
('environment', [("%s = %s" % (k, v))
for k, v in os.environ.items()
if re.search("^COV|^PY", k)]),
]
return info
