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"""Code unit (module) handling for Coverage."""
import glob, os
from coverage.backward import open_source, string_class, StringIO
from coverage.misc import CoverageException
def code_unit_factory(morfs, file_locator):
"""Construct a list of CodeUnits from polymorphic inputs.
`morfs` is a module or a filename, or a list of same.
`file_locator` is a FileLocator that can help resolve filenames.
Returns a list of CodeUnit objects.
"""
# Be sure we have a list.
if not isinstance(morfs, (list, tuple)):
morfs = [morfs]
# On Windows, the shell doesn't expand wildcards. Do it here.
globbed = []
for morf in morfs:
if isinstance(morf, string_class) and ('?' in morf or '*' in morf):
globbed.extend(glob.glob(morf))
else:
globbed.append(morf)
morfs = globbed
code_units = [CodeUnit(morf, file_locator) for morf in morfs]
return code_units
class CodeUnit(object):
"""Code unit: a filename or module.
Instance attributes:
`name` is a human-readable name for this code unit.
`filename` is the os path from which we can read the source.
`relative` is a boolean.
"""
def __init__(self, morf, file_locator):
self.file_locator = file_locator
if hasattr(morf, '__file__'):
f = morf.__file__
else:
f = morf
# .pyc files should always refer to a .py instead.
if f.endswith('.pyc') or f.endswith('.pyo'):
f = f[:-1]
elif f.endswith('$py.class'): # Jython
f = f[:-9] + ".py"
self.filename = self.file_locator.canonical_filename(f)
if hasattr(morf, '__name__'):
n = modname = morf.__name__
self.relative = True
else:
n = os.path.splitext(morf)[0]
rel = self.file_locator.relative_filename(n)
if os.path.isabs(n):
self.relative = (rel != n)
else:
self.relative = True
n = rel
modname = None
self.name = n
self.modname = modname
def __repr__(self):
return "<CodeUnit name=%r filename=%r>" % (self.name, self.filename)
# Annoying comparison operators. Py3k wants __lt__ etc, and Py2k needs all
# of them defined.
def __lt__(self, other): return self.name < other.name
def __le__(self, other): return self.name <= other.name
def __eq__(self, other): return self.name == other.name
def __ne__(self, other): return self.name != other.name
def __gt__(self, other): return self.name > other.name
def __ge__(self, other): return self.name >= other.name
def flat_rootname(self):
"""A base for a flat filename to correspond to this code unit.
Useful for writing files about the code where you want all the files in
the same directory, but need to differentiate same-named files from
different directories.
For example, the file a/b/c.py might return 'a_b_c'
"""
if self.modname:
return self.modname.replace('.', '_')
else:
root = os.path.splitdrive(self.name)[1]
return root.replace('\\', '_').replace('/', '_').replace('.', '_')
def source_file(self):
"""Return an open file for reading the source of the code unit."""
if os.path.exists(self.filename):
# A regular text file: open it.
return open_source(self.filename)
# Maybe it's in a zip file?
source = self.file_locator.get_zip_data(self.filename)
if source is not None:
return StringIO(source)
# Couldn't find source.
raise CoverageException(
"No source for code '%s'." % self.filename
)
def should_be_python(self):
"""Does it seem like this file should contain Python?
This is used to decide if a file reported as part of the exection of
a program was really likely to have contained Python in the first
place.
"""
# Get the file extension.
_, ext = os.path.splitext(self.filename)
# Anything named *.py* should be Python.
if ext.startswith('.py'):
return True
# A file with no extension should be Python.
if not ext:
return True
# Everything else is probably not Python.
return False