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-rw-r--r--src/engine/SCons/Util.py102
1 files changed, 53 insertions, 49 deletions
diff --git a/src/engine/SCons/Util.py b/src/engine/SCons/Util.py
index f2498e9..5b4c225 100644
--- a/src/engine/SCons/Util.py
+++ b/src/engine/SCons/Util.py
@@ -24,7 +24,7 @@ Various utility functions go here.
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-__revision__ = "src/engine/SCons/Util.py 103260fce95bf5db1c35fb2371983087d85dd611 2019-07-13 18:25:30 bdbaddog"
+__revision__ = "src/engine/SCons/Util.py e724ae812eb96f4858a132f5b8c769724744faf6 2019-07-21 00:04:47 bdeegan"
import os
import sys
@@ -33,6 +33,7 @@ import re
import types
import codecs
import pprint
+import hashlib
PY3 = sys.version_info[0] == 3
@@ -656,13 +657,15 @@ except ImportError:
pass
RegError = _NoError
-WinError = None
+
# Make sure we have a definition of WindowsError so we can
# run platform-independent tests of Windows functionality on
# platforms other than Windows. (WindowsError is, in fact, an
# OSError subclass on Windows.)
+
class PlainWindowsError(OSError):
pass
+
try:
WinError = WindowsError
except NameError:
@@ -676,7 +679,7 @@ if can_read_reg:
HKEY_USERS = hkey_mod.HKEY_USERS
def RegGetValue(root, key):
- """This utility function returns a value in the registry
+ r"""This utility function returns a value in the registry
without having to open the key first. Only available on
Windows platforms with a version of Python that can read the
registry. Returns the same thing as
@@ -883,7 +886,7 @@ def PrependPath(oldpath, newpath, sep = os.pathsep,
# now we add them only if they are unique
for path in newpaths:
normpath = os.path.normpath(os.path.normcase(path))
- if path and not normpath in normpaths:
+ if path and normpath not in normpaths:
paths.append(path)
normpaths.append(normpath)
@@ -963,7 +966,7 @@ def AppendPath(oldpath, newpath, sep = os.pathsep,
# now we add them only if they are unique
for path in newpaths:
normpath = os.path.normpath(os.path.normcase(path))
- if path and not normpath in normpaths:
+ if path and normpath not in normpaths:
paths.append(path)
normpaths.append(normpath)
paths.reverse()
@@ -999,7 +1002,9 @@ if sys.platform == 'cygwin':
def get_native_path(path):
"""Transforms an absolute path into a native path for the system. In
Cygwin, this converts from a Cygwin path to a Windows one."""
- return os.popen('cygpath -w ' + path).read().replace('\n', '')
+ with os.popen('cygpath -w ' + path) as p:
+ npath = p.read().replace('\n', '')
+ return npath
else:
def get_native_path(path):
"""Transforms an absolute path into a native path for the system.
@@ -1176,10 +1181,13 @@ def unique(s):
# ASPN: Python Cookbook: Remove duplicates from a sequence
# First comment, dated 2001/10/13.
# (Also in the printed Python Cookbook.)
+# This not currently used, in favor of the next function...
def uniquer(seq, idfun=None):
- if idfun is None:
- def idfun(x): return x
+ def default_idfun(x):
+ return x
+ if not idfun:
+ idfun = default_idfun
seen = {}
result = []
for item in seq:
@@ -1444,56 +1452,53 @@ def RenameFunction(function, name):
function.__defaults__)
-md5 = False
-
+if hasattr(hashlib, 'md5'):
+ md5 = True
-def MD5signature(s):
- return str(s)
+ def MD5signature(s):
+ """
+ Generate md5 signature of a string
+ :param s: either string or bytes. Normally should be bytes
+ :return: String of hex digits representing the signature
+ """
+ m = hashlib.md5()
-def MD5filesignature(fname, chunksize=65536):
- with open(fname, "rb") as f:
- result = f.read()
- return result
+ try:
+ m.update(to_bytes(s))
+ except TypeError as e:
+ m.update(to_bytes(str(s)))
-try:
- import hashlib
-except ImportError:
- pass
-else:
- if hasattr(hashlib, 'md5'):
- md5 = True
+ return m.hexdigest()
- def MD5signature(s):
- """
- Generate a String of Hex digits representing the md5 signature of the string
- :param s: either string or bytes. Normally should be bytes
- :return: String of hex digits
- """
- m = hashlib.md5()
+ def MD5filesignature(fname, chunksize=65536):
+ """
+ Generate the md5 signature of a file
- try:
- m.update(to_bytes(s))
- except TypeError as e:
- m.update(to_bytes(str(s)))
-
- return m.hexdigest()
-
- def MD5filesignature(fname, chunksize=65536):
- """
- :param fname:
- :param chunksize:
- :return: String of Hex digits
- """
- m = hashlib.md5()
- f = open(fname, "rb")
+ :param fname: file to hash
+ :param chunksize: chunk size to read
+ :return: String of Hex digits representing the signature
+ """
+ m = hashlib.md5()
+ with open(fname, "rb") as f:
while True:
blck = f.read(chunksize)
if not blck:
break
m.update(to_bytes(blck))
- f.close()
- return m.hexdigest()
+ return m.hexdigest()
+else:
+ # if md5 algorithm not available, just return data unmodified
+ # could add alternative signature scheme here
+ md5 = False
+
+ def MD5signature(s):
+ return str(s)
+
+ def MD5filesignature(fname, chunksize=65536):
+ with open(fname, "rb") as f:
+ result = f.read()
+ return result
def MD5collect(signatures):
@@ -1509,7 +1514,6 @@ def MD5collect(signatures):
return MD5signature(', '.join(signatures))
-
def silent_intern(x):
"""
Perform sys.intern() on the passed argument and return the result.
@@ -1533,7 +1537,7 @@ def silent_intern(x):
class Null(object):
""" Null objects always and reliably "do nothing." """
def __new__(cls, *args, **kwargs):
- if not '_instance' in vars(cls):
+ if '_instance' not in vars(cls):
cls._instance = super(Null, cls).__new__(cls, *args, **kwargs)
return cls._instance
def __init__(self, *args, **kwargs):