update raise syntax for python3 compatibility

misc/build_helpers/test-git-ignore.py

@@ -6,9 +6,7 @@ from subprocess import Popen, PIPE
 cmd = ["git", "status", "--porcelain"]
 p = Popen(cmd, stdout=PIPE)
 output = p.communicate()[0]
-print output
+print(output)
 if output == "":
     sys.exit(0)
 sys.exit(1)
-
-

newsfragments/3014.other

@@ -0,0 +1 @@
+Update raise syntax for Python3 compatibility.

py3_valid_syntax.txt

@@ -1,14 +1,6 @@
 docs/
 integration/
-misc/build_helpers/check-build.py
-misc/build_helpers/gen-package-table.py
-misc/build_helpers/run-deprecations.py
-misc/build_helpers/show-tool-versions.py
-misc/build_helpers/test-osx-pkg.py
-misc/coding_tools/
-misc/incident-gatherer/
-misc/operations_helpers/
-misc/simulators/
+misc/
 release-tools/
 setup.py
 src/allmydata/_auto_deps.py
@@ -20,6 +12,7 @@ src/allmydata/control.py
 src/allmydata/deep_stats.py
 src/allmydata/frontends/auth.py
 src/allmydata/frontends/__init__.py
+src/allmydata/frontends/magic_folder.py
 src/allmydata/hashtree.py
 src/allmydata/history.py
 src/allmydata/immutable/checker.py
@@ -35,6 +28,7 @@ src/allmydata/immutable/layout.py
 src/allmydata/immutable/literal.py
 src/allmydata/immutable/offloaded.py
 src/allmydata/immutable/repairer.py
+src/allmydata/__init__.py
 src/allmydata/interfaces.py
 src/allmydata/introducer/
 src/allmydata/magicfolderdb.py
@@ -125,6 +119,7 @@ src/allmydata/test/test_client.py
 src/allmydata/test/test_configutil.py
 src/allmydata/test/test_connections.py
 src/allmydata/test/test_crawler.py
+src/allmydata/test/test_dirnode.py
 src/allmydata/test/test_eliotutil.py
 src/allmydata/test/test_encode.py
 src/allmydata/test/test_encodingutil.py
@@ -168,6 +163,7 @@ src/allmydata/test/web/test_util.py
 src/allmydata/unknown.py
 src/allmydata/uri.py
 src/allmydata/util/abbreviate.py
+src/allmydata/util/assertutil.py
 src/allmydata/util/base32.py
 src/allmydata/util/base62.py
 src/allmydata/util/cachedir.py
@@ -178,6 +174,8 @@ src/allmydata/util/dbutil.py
 src/allmydata/util/deferredutil.py
 src/allmydata/util/dictutil.py
 src/allmydata/util/eliotutil.py
+src/allmydata/util/fake_inotify.py
+src/allmydata/util/fileutil.py
 src/allmydata/util/hashutil.py
 src/allmydata/util/i2p_provider.py
 src/allmydata/util/idlib.py
@@ -199,6 +197,7 @@ src/allmydata/util/repeatable_random.py
 src/allmydata/util/rrefutil.py
 src/allmydata/util/sibpath.py
 src/allmydata/util/statistics.py
+src/allmydata/util/time_format.py
 src/allmydata/util/tor_provider.py
 src/allmydata/util/verlib.py
 src/allmydata/util/yamlutil.py
@@ -206,7 +205,8 @@ src/allmydata/_version.py
 src/allmydata/watchdog/
 src/allmydata/web/
 src/allmydata/windows/__init__.py
+src/allmydata/windows/inotify.py
+src/allmydata/windows/registry.py
 src/allmydata/windows/tahoesvc.py
 static/
-static/tahoe.py
 ws_client.py

src/allmydata/__init__.py

@@ -3,6 +3,8 @@ Decentralized storage grid.
 
 community web site: U{https://tahoe-lafs.org/}
 """
+import six
+
 
 class PackagingError(EnvironmentError):
     """
@@ -146,8 +148,10 @@ def normalized_version(verstr, what=None):
         raise
     except StandardError:
         cls, value, trace = sys.exc_info()
-        raise PackagingError, ("could not parse %s due to %s: %s"
-                               % (what or repr(verstr), cls.__name__, value)), trace
+        new_exc = PackagingError("could not parse %s due to %s: %s"
+                                 % (what or repr(verstr), cls.__name__, value))
+        six.reraise(cls, new_exc, trace)
+
 
 def get_openssl_version():
     try:

src/allmydata/util/assertutil.py

@@ -18,7 +18,7 @@ def _assert(___cond=False, *___args, **___kwargs):
             msgbuf.append("%s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
     msgbuf.extend([", %s: %s %s" % tuple(map(hr, (k, v, type(v),))) for k, v in ___kwargs.items()[1:]])
 
-    raise AssertionError, "".join(msgbuf)
+    raise AssertionError("".join(msgbuf))
 
 def precondition(___cond=False, *___args, **___kwargs):
     if ___cond:
@@ -36,7 +36,7 @@ def precondition(___cond=False, *___args, **___kwargs):
             msgbuf.append("%s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
     msgbuf.extend([", %s: %s %s" % tuple(map(hr, (k, v, type(v),))) for k, v in ___kwargs.items()[1:]])
 
-    raise AssertionError, "".join(msgbuf)
+    raise AssertionError("".join(msgbuf))
 
 def postcondition(___cond=False, *___args, **___kwargs):
     if ___cond:
@@ -54,4 +54,4 @@ def postcondition(___cond=False, *___args, **___kwargs):
             msgbuf.append("%s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
     msgbuf.extend([", %s: %s %s" % tuple(map(hr, (k, v, type(v),))) for k, v in ___kwargs.items()[1:]])
 
-    raise AssertionError, "".join(msgbuf)
+    raise AssertionError("".join(msgbuf))

src/allmydata/util/fileutil.py

@@ -5,6 +5,7 @@ Futz with files like a pro.
 """
 
 import sys, exceptions, os, stat, tempfile, time, binascii
+import six
 from collections import namedtuple
 from errno import ENOENT
 
@@ -189,7 +190,7 @@ def make_dirs(dirname, mode=0o777):
     if not os.path.isdir(dirname):
         if tx:
             raise tx
-        raise exceptions.IOError, "unknown error prevented creation of directory, or deleted the directory immediately after creation: %s" % dirname # careful not to construct an IOError with a 2-tuple, as that has a special meaning...
+        raise exceptions.IOError("unknown error prevented creation of directory, or deleted the directory immediately after creation: %s" % dirname) # careful not to construct an IOError with a 2-tuple, as that has a special meaning...
 
 def rm_dir(dirname):
     """
@@ -222,8 +223,8 @@ def rm_dir(dirname):
         if len(excs) == 1:
             raise excs[0]
         if len(excs) == 0:
-            raise OSError, "Failed to remove dir for unknown reason."
-        raise OSError, excs
+            raise OSError("Failed to remove dir for unknown reason.")
+        raise OSError(excs)
 
 
 def remove_if_possible(f):
@@ -594,13 +595,16 @@ else:
 class ConflictError(Exception):
     pass
 
+
 class UnableToUnlinkReplacementError(Exception):
     pass
 
+
 def reraise(wrapper):
-    _, exc, tb = sys.exc_info()
-    wrapper_exc = wrapper("%s: %s" % (exc.__class__.__name__, exc))
-    raise wrapper_exc.__class__, wrapper_exc, tb
+    cls, exc, tb = sys.exc_info()
+    wrapper_exc = wrapper("%s: %s" % (cls.__name__, exc))
+    six.reraise(wrapper, wrapper_exc, tb)
+
 
 if sys.platform == "win32":
     # <https://msdn.microsoft.com/en-us/library/windows/desktop/aa365512%28v=vs.85%29.aspx>

src/allmydata/util/time_format.py

@@ -25,7 +25,7 @@ def iso_utc_time_to_seconds(isotime, _conversion_re=re.compile(r"(?P<year>\d{4})
     """
     m = _conversion_re.match(isotime)
     if not m:
-        raise ValueError, (isotime, "not a complete ISO8601 timestamp")
+        raise ValueError(isotime, "not a complete ISO8601 timestamp")
     year, month, day = int(m.group('year')), int(m.group('month')), int(m.group('day'))
     hour, minute, second = int(m.group('hour')), int(m.group('minute')), int(m.group('second'))
     subsecstr = m.group('subsecond')

src/allmydata/windows/registry.py

@@ -40,7 +40,7 @@ def get_registry_setting(key, name, _topkey=None):
         except WindowsError:
             continue
     # We didn't find the key:
-    raise KeyError, (key, name, "registry setting not found")
+    raise KeyError(key, name, "registry setting not found")
 
 def set_registry_setting(key, name, data, reg_type=_winreg.REG_SZ,
                          _topkey=_winreg.HKEY_LOCAL_MACHINE, create_key_if_missing=True):
@@ -55,7 +55,7 @@ def set_registry_setting(key, name, data, reg_type=_winreg.REG_SZ,
         if create_key_if_missing:
             regkey = _winreg.CreateKey(_topkey, key)
         else:
-            raise KeyError, (key, "registry key not found")
+            raise KeyError(key, "registry key not found")
 
     try:
         _winreg.DeleteValue(regkey, name)