New upstream version 3.0.0upstream/3.0.0

1 files changed, 234 insertions, 204 deletions

diff --git a/engine/SCons/dblite.py b/engine/SCons/dblite.py
index 707a4f8..87a1763 100644
--- a/engine/SCons/dblite.py
+++ b/engine/SCons/dblite.py
@@ -1,21 +1,24 @@
 # dblite.py module contributed by Ralf W. Grosse-Kunstleve.
 # Extended for Unicode by Steven Knight.
-
-import SCons.compat
+from __future__ import print_function
 
 import os
-# compat layer imports "cPickle" for us if it's available.
 import pickle
 import shutil
 import time
 
+from SCons.compat import PICKLE_PROTOCOL
+
 keep_all_files = 00000
 ignore_corrupt_dbfiles = 0
 
+
 def corruption_warning(filename):
-    print "Warning: Discarding corrupt database:", filename
+    print("Warning: Discarding corrupt database:", filename)
 
-try: unicode
+
+try:
+    unicode
 except NameError:
     def is_string(s):
         return isinstance(s, str)
@@ -23,231 +26,258 @@ else:
     def is_string(s):
         return type(s) in (str, unicode)
 
+
+def is_bytes(s):
+    return isinstance(s, bytes)
+
+
 try:
     unicode('a')
 except NameError:
-    def unicode(s): return s
+    def unicode(s):
+        return s
 
 dblite_suffix = '.dblite'
+
+# TODO: Does commenting this out break switching from py2/3?
+# if bytes is not str:
+#     dblite_suffix += '.p3'
 tmp_suffix = '.tmp'
 
+
 class dblite(object):
+    """
+    Squirrel away references to the functions in various modules
+    that we'll use when our __del__() method calls our sync() method
+    during shutdown.  We might get destroyed when Python is in the midst
+    of tearing down the different modules we import in an essentially
+    arbitrary order, and some of the various modules's global attributes
+    may already be wiped out from under us.
 
-  # Squirrel away references to the functions in various modules
-  # that we'll use when our __del__() method calls our sync() method
-  # during shutdown.  We might get destroyed when Python is in the midst
-  # of tearing down the different modules we import in an essentially
-  # arbitrary order, and some of the various modules's global attributes
-  # may already be wiped out from under us.
-  #
-  # See the discussion at:
-  #   http://mail.python.org/pipermail/python-bugs-list/2003-March/016877.html
-
-  _open = open
-  _pickle_dump = staticmethod(pickle.dump)
-  _os_chmod = os.chmod
-  try:
-      _os_chown = os.chown
-  except AttributeError:
-      _os_chown = None
-  _os_rename = os.rename
-  _os_unlink = os.unlink
-  _shutil_copyfile = shutil.copyfile
-  _time_time = time.time
-
-  def __init__(self, file_base_name, flag, mode):
-    assert flag in (None, "r", "w", "c", "n")
-    if (flag is None): flag = "r"
-    base, ext = os.path.splitext(file_base_name)
-    if ext == dblite_suffix:
-      # There's already a suffix on the file name, don't add one.
-      self._file_name = file_base_name
-      self._tmp_name = base + tmp_suffix
-    else:
-      self._file_name = file_base_name + dblite_suffix
-      self._tmp_name = file_base_name + tmp_suffix
-    self._flag = flag
-    self._mode = mode
-    self._dict = {}
-    self._needs_sync = 00000
-    if self._os_chown is not None and (os.geteuid()==0 or os.getuid()==0):
-      # running as root; chown back to current owner/group when done
-      try:
-        statinfo = os.stat(self._file_name)
-        self._chown_to = statinfo.st_uid
-        self._chgrp_to = statinfo.st_gid
-      except OSError, e:
-        # db file doesn't exist yet.
-        # Check os.environ for SUDO_UID, use if set
-        self._chown_to = int(os.environ.get('SUDO_UID', -1))
-        self._chgrp_to = int(os.environ.get('SUDO_GID', -1))
-    else:
-      self._chown_to = -1        # don't chown
-      self._chgrp_to = -1        # don't chgrp
-    if (self._flag == "n"):
-      self._open(self._file_name, "wb", self._mode)
-    else:
-      try:
-        f = self._open(self._file_name, "rb")
-      except IOError, e:
-        if (self._flag != "c"):
-          raise e
-        self._open(self._file_name, "wb", self._mode)
-      else:
-        p = f.read()
-        if (len(p) > 0):
-          try:
-            self._dict = pickle.loads(p)
-          except (pickle.UnpicklingError, EOFError, KeyError):
-            # Note how we catch KeyErrors too here, which might happen
-            # when we don't have cPickle available (default pickle
-            # throws it).
-            if (ignore_corrupt_dbfiles == 0): raise
-            if (ignore_corrupt_dbfiles == 1):
-              corruption_warning(self._file_name)
-
-  def close(self):
-    if (self._needs_sync):
-      self.sync()
-
-  def __del__(self):
-    self.close()
-
-  def sync(self):
-    self._check_writable()
-    f = self._open(self._tmp_name, "wb", self._mode)
-    self._pickle_dump(self._dict, f, 1)
-    f.close()
-    # Windows doesn't allow renaming if the file exists, so unlink
-    # it first, chmod'ing it to make sure we can do so.  On UNIX, we
-    # may not be able to chmod the file if it's owned by someone else
-    # (e.g. from a previous run as root).  We should still be able to
-    # unlink() the file if the directory's writable, though, so ignore
-    # any OSError exception  thrown by the chmod() call.
-    try: self._os_chmod(self._file_name, 0777)
-    except OSError: pass
-    self._os_unlink(self._file_name)
-    self._os_rename(self._tmp_name, self._file_name)
-    if self._os_chown is not None and self._chown_to > 0: # don't chown to root or -1
-      try:
-        self._os_chown(self._file_name, self._chown_to, self._chgrp_to)
-      except OSError:
-        pass
-    self._needs_sync = 00000
-    if (keep_all_files):
-      self._shutil_copyfile(
-        self._file_name,
-        self._file_name + "_" + str(int(self._time_time())))
+    See the discussion at:
+      http://mail.python.org/pipermail/python-bugs-list/2003-March/016877.html
+    """
+
+    _open = open
+    _pickle_dump = staticmethod(pickle.dump)
+    _pickle_protocol = PICKLE_PROTOCOL
+    _os_chmod = os.chmod
+
+    try:
+        _os_chown = os.chown
+    except AttributeError:
+        _os_chown = None
+
+    _os_rename = os.rename
+    _os_unlink = os.unlink
+    _shutil_copyfile = shutil.copyfile
+    _time_time = time.time
+
+    def __init__(self, file_base_name, flag, mode):
+        assert flag in (None, "r", "w", "c", "n")
+        if (flag is None): flag = "r"
+
+        base, ext = os.path.splitext(file_base_name)
+        if ext == dblite_suffix:
+            # There's already a suffix on the file name, don't add one.
+            self._file_name = file_base_name
+            self._tmp_name = base + tmp_suffix
+        else:
+            self._file_name = file_base_name + dblite_suffix
+            self._tmp_name = file_base_name + tmp_suffix
+
+        self._flag = flag
+        self._mode = mode
+        self._dict = {}
+        self._needs_sync = 00000
 
-  def _check_writable(self):
-    if (self._flag == "r"):
-      raise IOError("Read-only database: %s" % self._file_name)
+        if self._os_chown is not None and (os.geteuid() == 0 or os.getuid() == 0):
+            # running as root; chown back to current owner/group when done
+            try:
+                statinfo = os.stat(self._file_name)
+                self._chown_to = statinfo.st_uid
+                self._chgrp_to = statinfo.st_gid
+            except OSError as e:
+                # db file doesn't exist yet.
+                # Check os.environ for SUDO_UID, use if set
+                self._chown_to = int(os.environ.get('SUDO_UID', -1))
+                self._chgrp_to = int(os.environ.get('SUDO_GID', -1))
+        else:
+            self._chown_to = -1  # don't chown
+            self._chgrp_to = -1  # don't chgrp
 
-  def __getitem__(self, key):
-    return self._dict[key]
+        if (self._flag == "n"):
+            self._open(self._file_name, "wb", self._mode)
+        else:
+            try:
+                f = self._open(self._file_name, "rb")
+            except IOError as e:
+                if (self._flag != "c"):
+                    raise e
+                self._open(self._file_name, "wb", self._mode)
+            else:
+                p = f.read()
+                if len(p) > 0:
+                    try:
+                        if bytes is not str:
+                            self._dict = pickle.loads(p, encoding='bytes')
+                        else:
+                            self._dict = pickle.loads(p)
+                    except (pickle.UnpicklingError, EOFError, KeyError):
+                        # Note how we catch KeyErrors too here, which might happen
+                        # when we don't have cPickle available (default pickle
+                        # throws it).
+                        if (ignore_corrupt_dbfiles == 0): raise
+                        if (ignore_corrupt_dbfiles == 1):
+                            corruption_warning(self._file_name)
 
-  def __setitem__(self, key, value):
-    self._check_writable()
-    if (not is_string(key)):
-      raise TypeError("key `%s' must be a string but is %s" % (key, type(key)))
-    if (not is_string(value)):
-      raise TypeError("value `%s' must be a string but is %s" % (value, type(value)))
-    self._dict[key] = value
-    self._needs_sync = 0001
+    def close(self):
+        if (self._needs_sync):
+            self.sync()
 
-  def keys(self):
-    return list(self._dict.keys())
+    def __del__(self):
+        self.close()
 
-  def has_key(self, key):
-    return key in self._dict
+    def sync(self):
+        self._check_writable()
+        f = self._open(self._tmp_name, "wb", self._mode)
+        self._pickle_dump(self._dict, f, self._pickle_protocol)
+        f.close()
 
-  def __contains__(self, key):
-    return key in self._dict
+        # Windows doesn't allow renaming if the file exists, so unlink
+        # it first, chmod'ing it to make sure we can do so.  On UNIX, we
+        # may not be able to chmod the file if it's owned by someone else
+        # (e.g. from a previous run as root).  We should still be able to
+        # unlink() the file if the directory's writable, though, so ignore
+        # any OSError exception  thrown by the chmod() call.
+        try:
+            self._os_chmod(self._file_name, 0o777)
+        except OSError:
+            pass
+        self._os_unlink(self._file_name)
+        self._os_rename(self._tmp_name, self._file_name)
+        if self._os_chown is not None and self._chown_to > 0:  # don't chown to root or -1
+            try:
+                self._os_chown(self._file_name, self._chown_to, self._chgrp_to)
+            except OSError:
+                pass
+        self._needs_sync = 00000
+        if (keep_all_files):
+            self._shutil_copyfile(
+                self._file_name,
+                self._file_name + "_" + str(int(self._time_time())))
 
-  def iterkeys(self):
-    # Wrapping name in () prevents fixer from "fixing" this
-    return (self._dict.iterkeys)()
+    def _check_writable(self):
+        if (self._flag == "r"):
+            raise IOError("Read-only database: %s" % self._file_name)
 
-  __iter__ = iterkeys
+    def __getitem__(self, key):
+        return self._dict[key]
 
-  def __len__(self):
-    return len(self._dict)
+    def __setitem__(self, key, value):
+        self._check_writable()
+        if (not is_string(key)):
+            raise TypeError("key `%s' must be a string but is %s" % (key, type(key)))
+        if (not is_bytes(value)):
+            raise TypeError("value `%s' must be a bytes but is %s" % (value, type(value)))
+        self._dict[key] = value
+        self._needs_sync = 0o001
+
+    def keys(self):
+        return list(self._dict.keys())
+
+    def has_key(self, key):
+        return key in self._dict
+
+    def __contains__(self, key):
+        return key in self._dict
+
+    def iterkeys(self):
+        # Wrapping name in () prevents fixer from "fixing" this
+        return (self._dict.iterkeys)()
+
+    __iter__ = iterkeys
+
+    def __len__(self):
+        return len(self._dict)
+
+
+def open(file, flag=None, mode=0o666):
+    return dblite(file, flag, mode)
 
-def open(file, flag=None, mode=0666):
-  return dblite(file, flag, mode)
 
 def _exercise():
-  db = open("tmp", "n")
-  assert len(db) == 0
-  db["foo"] = "bar"
-  assert db["foo"] == "bar"
-  db[unicode("ufoo")] = unicode("ubar")
-  assert db[unicode("ufoo")] == unicode("ubar")
-  db.sync()
-  db = open("tmp", "c")
-  assert len(db) == 2, len(db)
-  assert db["foo"] == "bar"
-  db["bar"] = "foo"
-  assert db["bar"] == "foo"
-  db[unicode("ubar")] = unicode("ufoo")
-  assert db[unicode("ubar")] == unicode("ufoo")
-  db.sync()
-  db = open("tmp", "r")
-  assert len(db) == 4, len(db)
-  assert db["foo"] == "bar"
-  assert db["bar"] == "foo"
-  assert db[unicode("ufoo")] == unicode("ubar")
-  assert db[unicode("ubar")] == unicode("ufoo")
-  try:
+    db = open("tmp", "n")
+    assert len(db) == 0
+    db["foo"] = "bar"
+    assert db["foo"] == "bar"
+    db[unicode("ufoo")] = unicode("ubar")
+    assert db[unicode("ufoo")] == unicode("ubar")
+    db.sync()
+    db = open("tmp", "c")
+    assert len(db) == 2, len(db)
+    assert db["foo"] == "bar"
+    db["bar"] = "foo"
+    assert db["bar"] == "foo"
+    db[unicode("ubar")] = unicode("ufoo")
+    assert db[unicode("ubar")] == unicode("ufoo")
     db.sync()
-  except IOError, e:
-    assert str(e) == "Read-only database: tmp.dblite"
-  else:
-    raise RuntimeError("IOError expected.")
-  db = open("tmp", "w")
-  assert len(db) == 4
-  db["ping"] = "pong"
-  db.sync()
-  try:
-    db[(1,2)] = "tuple"
-  except TypeError, e:
-    assert str(e) == "key `(1, 2)' must be a string but is <type 'tuple'>", str(e)
-  else:
-    raise RuntimeError("TypeError exception expected")
-  try:
-    db["list"] = [1,2]
-  except TypeError, e:
-    assert str(e) == "value `[1, 2]' must be a string but is <type 'list'>", str(e)
-  else:
-    raise RuntimeError("TypeError exception expected")
-  db = open("tmp", "r")
-  assert len(db) == 5
-  db = open("tmp", "n")
-  assert len(db) == 0
-  dblite._open("tmp.dblite", "w")
-  db = open("tmp", "r")
-  dblite._open("tmp.dblite", "w").write("x")
-  try:
     db = open("tmp", "r")
-  except pickle.UnpicklingError:
-    pass
-  else:
-    raise RuntimeError("pickle exception expected.")
-  global ignore_corrupt_dbfiles
-  ignore_corrupt_dbfiles = 2
-  db = open("tmp", "r")
-  assert len(db) == 0
-  os.unlink("tmp.dblite")
-  try:
+    assert len(db) == 4, len(db)
+    assert db["foo"] == "bar"
+    assert db["bar"] == "foo"
+    assert db[unicode("ufoo")] == unicode("ubar")
+    assert db[unicode("ubar")] == unicode("ufoo")
+    try:
+        db.sync()
+    except IOError as e:
+        assert str(e) == "Read-only database: tmp.dblite"
+    else:
+        raise RuntimeError("IOError expected.")
     db = open("tmp", "w")
-  except IOError, e:
-    assert str(e) == "[Errno 2] No such file or directory: 'tmp.dblite'", str(e)
-  else:
-    raise RuntimeError("IOError expected.")
-  print "OK"
+    assert len(db) == 4
+    db["ping"] = "pong"
+    db.sync()
+    try:
+        db[(1, 2)] = "tuple"
+    except TypeError as e:
+        assert str(e) == "key `(1, 2)' must be a string but is <type 'tuple'>", str(e)
+    else:
+        raise RuntimeError("TypeError exception expected")
+    try:
+        db["list"] = [1, 2]
+    except TypeError as e:
+        assert str(e) == "value `[1, 2]' must be a string but is <type 'list'>", str(e)
+    else:
+        raise RuntimeError("TypeError exception expected")
+    db = open("tmp", "r")
+    assert len(db) == 5
+    db = open("tmp", "n")
+    assert len(db) == 0
+    dblite._open("tmp.dblite", "w")
+    db = open("tmp", "r")
+    dblite._open("tmp.dblite", "w").write("x")
+    try:
+        db = open("tmp", "r")
+    except pickle.UnpicklingError:
+        pass
+    else:
+        raise RuntimeError("pickle exception expected.")
+    global ignore_corrupt_dbfiles
+    ignore_corrupt_dbfiles = 2
+    db = open("tmp", "r")
+    assert len(db) == 0
+    os.unlink("tmp.dblite")
+    try:
+        db = open("tmp", "w")
+    except IOError as e:
+        assert str(e) == "[Errno 2] No such file or directory: 'tmp.dblite'", str(e)
+    else:
+        raise RuntimeError("IOError expected.")
+
 
 if (__name__ == "__main__"):
-  _exercise()
+    _exercise()
 
 # Local Variables:
 # tab-width:4