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remove code.new() function and store lines directly into linecache.cache instead. 

This avoids the need for custom code objects, improving compatibility for jython
and pypy-c.

--HG--
branch : trunk
This commit is contained in:
holger krekel 2010-05-11 22:54:04 +02:00
parent 8ba2a98e11
commit 379390a8aa
8 changed files with 43 additions and 185 deletions
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5
CHANGELOG
View File

@ -11,6 +11,11 @@ Changes between 1.3.0 and 1.3.1
- improve tracebacks presentation:
- raises shows shorter more relevant tracebacks
- improve support for raises and other dynamically compiled code by
manipulating python's linecache.cache instead of the previous
rather hacky way of creating custom code objects. This makes
it seemlessly work on Jython and PyPy at least.
Changes between 1.2.1 and 1.3.0
==================================================

5
py/_builtin.py
View File

@ -151,7 +151,10 @@ else:
return getattr(function, "__dict__", None)
def _getcode(function):
return getattr(function, "func_code", None)
try:
return getattr(function, "__code__")
except AttributeError:
return getattr(function, "func_code", None)
def print_(*args, **kwargs):
""" minimal backport of py3k print statement. """

62
py/_code/code.py
View File

@ -23,64 +23,14 @@ class Code(object):
def __ne__(self, other):
return not self == other
def new(self, rec=False, **kwargs):
""" return new code object with modified attributes.
if rec-cursive is true then dive into code
objects contained in co_consts.
"""
if sys.platform.startswith("java"):
# XXX jython does not support the below co_filename hack
return self.raw
names = [x for x in dir(self.raw) if x[:3] == 'co_']
for name in kwargs:
if name not in names:
raise TypeError("unknown code attribute: %r" %(name, ))
if rec and hasattr(self.raw, 'co_consts'): # jython
newconstlist = []
co = self.raw
cotype = type(co)
for c in co.co_consts:
if isinstance(c, cotype):
c = self.__class__(c).new(rec=True, **kwargs)
newconstlist.append(c)
return self.new(rec=False, co_consts=tuple(newconstlist), **kwargs)
for name in names:
if name not in kwargs:
kwargs[name] = getattr(self.raw, name)
arglist = [
kwargs['co_argcount'],
kwargs['co_nlocals'],
kwargs.get('co_stacksize', 0), # jython
kwargs.get('co_flags', 0), # jython
kwargs.get('co_code', ''), # jython
kwargs.get('co_consts', ()), # jython
kwargs.get('co_names', []), #
kwargs['co_varnames'],
kwargs['co_filename'],
kwargs['co_name'],
kwargs['co_firstlineno'],
kwargs.get('co_lnotab', ''), #jython
kwargs.get('co_freevars', None), #jython
kwargs.get('co_cellvars', None), # jython
]
if sys.version_info >= (3,0):
arglist.insert(1, kwargs['co_kwonlyargcount'])
return self.raw.__class__(*arglist)
else:
return py.std.new.code(*arglist)
def path(self):
""" return a path object pointing to source code"""
fn = self.raw.co_filename
try:
return fn.__path__
except AttributeError:
p = py.path.local(self.raw.co_filename)
if not p.check():
# XXX maybe try harder like the weird logic
# in the standard lib [linecache.updatecache] does?
p = self.raw.co_filename
return p
p = py.path.local(self.raw.co_filename)
if not p.check():
# XXX maybe try harder like the weird logic
# in the standard lib [linecache.updatecache] does?
p = self.raw.co_filename
return p
path = property(path, None, None, "path of this code object")

60
py/_code/source.py
View File

@ -212,10 +212,10 @@ class Source(object):
else:
if flag & _AST_FLAG:
return co
co_filename = MyStr(filename)
co_filename.__source__ = self
return py.code.Code(co).new(rec=1, co_filename=co_filename)
#return newcode_withfilename(co, co_filename)
from types import ModuleType
lines = [(x + "\n") for x in self.lines]
py.std.linecache.cache[filename] = (1, None, lines, filename)
return co
#
# public API shortcut functions
@ -224,11 +224,9 @@ class Source(object):
def compile_(source, filename=None, mode='exec', flags=
generators.compiler_flag, dont_inherit=0):
""" compile the given source to a raw code object,
which points back to the source code through
"co_filename.__source__". All code objects
contained in the code object will recursively
also have this special subclass-of-string
filename.
and maintain an internal cache which allows later
retrieval of the source code for the code object
and any recursively created code objects.
"""
if _ast is not None and isinstance(source, _ast.AST):
# XXX should Source support having AST?
@ -262,44 +260,26 @@ def getfslineno(obj):
#
# helper functions
#
class MyStr(str):
""" custom string which allows to add attributes. """
def findsource(obj):
obj = py.code.getrawcode(obj)
try:
fullsource = obj.co_filename.__source__
except AttributeError:
try:
sourcelines, lineno = py.std.inspect.findsource(obj)
except (KeyboardInterrupt, SystemExit):
raise
except:
return None, None
source = Source()
source.lines = [line.rstrip() for line in sourcelines]
return source, lineno
else:
lineno = obj.co_firstlineno - 1
return fullsource, lineno
sourcelines, lineno = py.std.inspect.findsource(obj)
except (KeyboardInterrupt, SystemExit):
raise
except:
return None, None
source = Source()
source.lines = [line.rstrip() for line in sourcelines]
return source, lineno
def getsource(obj, **kwargs):
obj = py.code.getrawcode(obj)
try:
fullsource = obj.co_filename.__source__
except AttributeError:
try:
strsrc = inspect.getsource(obj)
except IndentationError:
strsrc = "\"Buggy python version consider upgrading, cannot get source\""
assert isinstance(strsrc, str)
return Source(strsrc, **kwargs)
else:
lineno = obj.co_firstlineno - 1
end = fullsource.getblockend(lineno)
return Source(fullsource[lineno:end+1], deident=True)
strsrc = inspect.getsource(obj)
except IndentationError:
strsrc = "\"Buggy python version consider upgrading, cannot get source\""
assert isinstance(strsrc, str)
return Source(strsrc, **kwargs)
def deindent(lines, offset=None):
if offset is None:

75
testing/code/test_code.py
View File

@ -1,87 +1,12 @@
from __future__ import generators
import py
import sys
failsonjython = py.test.mark.xfail("sys.platform.startswith('java')")
def test_newcode():
source = "i = 3"
co = compile(source, '', 'exec')
code = py.code.Code(co)
newco = code.new()
assert co == newco
def test_ne():
code1 = py.code.Code(compile('foo = "bar"', '', 'exec'))
assert code1 == code1
code2 = py.code.Code(compile('foo = "baz"', '', 'exec'))
assert code2 != code1
@failsonjython
def test_newcode_unknown_args():
code = py.code.Code(compile("", '', 'exec'))
py.test.raises(TypeError, 'code.new(filename="hello")')
@failsonjython
def test_newcode_withfilename():
source = py.code.Source("""
def f():
def g():
pass
""")
co = compile(str(source)+'\n', 'nada', 'exec')
obj = 'hello'
newco = py.code.Code(co).new(rec=True, co_filename=obj)
def walkcode(co):
for x in co.co_consts:
if isinstance(x, type(co)):
for y in walkcode(x):
yield y
yield co
names = []
for code in walkcode(newco):
assert newco.co_filename == obj
assert newco.co_filename is obj
names.append(code.co_name)
assert 'f' in names
assert 'g' in names
@failsonjython
def test_newcode_with_filename():
source = "i = 3"
co = compile(source, '', 'exec')
code = py.code.Code(co)
class MyStr(str):
pass
filename = MyStr("hello")
filename.__source__ = py.code.Source(source)
newco = code.new(rec=True, co_filename=filename)
assert newco.co_filename.__source__ == filename.__source__
s = py.code.Source(newco)
assert str(s) == source
@failsonjython
def test_new_code_object_carries_filename_through():
class mystr(str):
pass
filename = mystr("dummy")
co = compile("hello\n", filename, 'exec')
assert not isinstance(co.co_filename, mystr)
args = [
co.co_argcount, co.co_nlocals, co.co_stacksize,
co.co_flags, co.co_code, co.co_consts,
co.co_names, co.co_varnames,
filename,
co.co_name, co.co_firstlineno, co.co_lnotab,
co.co_freevars, co.co_cellvars
]
if sys.version_info > (3,0):
args.insert(1, co.co_kwonlyargcount)
c2 = py.std.types.CodeType(*args)
assert c2.co_filename is filename
def test_code_gives_back_name_for_not_existing_file():
name = 'abc-123'
co_code = compile("pass\n", name, 'exec')

1
testing/code/test_excinfo.py
View File

@ -293,7 +293,6 @@ class TestFormattedExcinfo:
assert lines[0] == "| def f(x):"
assert lines[1] == " pass"
@failsonjython
def test_repr_source_excinfo(self):
""" check if indentation is right """
pr = FormattedExcinfo()

14
testing/code/test_source.py
View File

@ -80,11 +80,10 @@ def test_source_strip_multiline():
source2 = source.strip()
assert source2.lines == [" hello"]
@failsonjython
def test_syntaxerror_rerepresentation():
ex = py.test.raises(SyntaxError, py.code.compile, 'x x')
ex = py.test.raises(SyntaxError, py.code.compile, 'xyz xyz')
assert ex.value.lineno == 1
assert ex.value.offset == 3
assert ex.value.offset in (4,7) # XXX pypy/jython versus cpython?
assert ex.value.text.strip(), 'x x'
def test_isparseable():
@ -132,7 +131,6 @@ class TestSourceParsingAndCompiling:
exec (co, d)
assert d['x'] == 3
@failsonjython
def test_compile_and_getsource_simple(self):
co = py.code.compile("x=3")
exec (co)
@ -203,7 +201,6 @@ class TestSourceParsingAndCompiling:
assert isinstance(mod, ast.Module)
compile(mod, "<filename>", "exec")
@failsonjython
def test_compile_and_getsource(self):
co = self.source.compile()
py.builtin.exec_(co, globals())
@ -260,7 +257,6 @@ def test_getstartingblock_multiline():
l = [i for i in x.source.lines if i.strip()]
assert len(l) == 4
@failsonjython
def test_getline_finally():
def c(): pass
excinfo = py.test.raises(TypeError, """
@ -274,7 +270,6 @@ def test_getline_finally():
source = excinfo.traceback[-1].statement
assert str(source).strip() == 'c(1)'
@failsonjython
def test_getfuncsource_dynamic():
source = """
def f():
@ -341,7 +336,6 @@ def test_getsource_fallback():
src = getsource(x)
assert src == expected
@failsonjython
def test_idem_compile_and_getsource():
from py._code.source import getsource
expected = "def x(): pass"
@ -355,8 +349,7 @@ def test_findsource_fallback():
assert 'test_findsource_simple' in str(src)
assert src[lineno] == ' def x():'
@failsonjython
def test_findsource___source__():
def test_findsource():
from py._code.source import findsource
co = py.code.compile("""if 1:
def x():
@ -373,7 +366,6 @@ def test_findsource___source__():
assert src[lineno] == " def x():"
@failsonjython
def test_getfslineno():
from py.code import getfslineno

6
testing/plugin/test_pytest_runner.py
View File

@ -316,7 +316,11 @@ def test_runtest_in_module_ordering(testdir):
class TestRaises:
def test_raises(self):
py.test.raises(ValueError, "int('qwe')")
source = "int('qwe')"
excinfo = py.test.raises(ValueError, source)
code = excinfo.traceback[-1].frame.code
s = str(code.fullsource)
assert s == source
def test_raises_exec(self):
py.test.raises(ValueError, "a,x = []")