[PATCH 1 of 2] py3: conditionalize the raise statement

[Pulkit Goyal]

# HG changeset patch
# User Pulkit Goyal <7895pulkit at gmail.com>
# Date 1470680471 -19800
#      Mon Aug 08 23:51:11 2016 +0530
# Node ID 9a344ce563ce2221bdfc9031b8f249d9da2f08b0
# Parent  37b6f0ec6241a62de90737409458cd622e2fac0d
py3: conditionalize the raise statement

raise E,V,T is not acceptable in Python 3, thats is conditionalized.
Moreover this will result in syntax error so we have to use exec() to
execute this. Related PEP- https://www.python.org/dev/peps/pep-3109/#id14

Moreover this patch also contain an update to test-check-py3-compat.t

diff --git a/mercurial/bundle2.py b/mercurial/bundle2.py
--- a/mercurial/bundle2.py
+++ b/mercurial/bundle2.py
@@ -989,7 +989,10 @@
             outdebug(ui, 'closing payload chunk')
             # abort current part payload
             yield _pack(_fpayloadsize, 0)
-            raise exc_info[0], exc_info[1], exc_info[2]
+            if sys.version_info[0] >= 3:
+                raise exc_info[0](exc_info[1]).with_traceback(exc_info[2])
+            else:
+                exec("""raise exc_info[0], exc_info[1], exc_info[2]""")
         # end of payload
         outdebug(ui, 'closing payload chunk')
         yield _pack(_fpayloadsize, 0)
diff --git a/tests/test-check-py3-compat.t b/tests/test-check-py3-compat.t
--- a/tests/test-check-py3-compat.t
+++ b/tests/test-check-py3-compat.t
@@ -81,7 +81,7 @@
   mercurial/archival.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
   mercurial/bookmarks.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
   mercurial/branchmap.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
-  mercurial/bundle2.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
+  mercurial/bundle2.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
   mercurial/bundlerepo.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
   mercurial/byterange.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
   mercurial/changegroup.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
@@ -136,13 +136,13 @@
   mercurial/patch.py: error importing: <TypeError> getattr(): attribute name must be string (error at pycompat.py:*) (glob)
   mercurial/pathutil.py: error importing: <TypeError> getattr(): attribute name must be string (error at pycompat.py:*) (glob)
   mercurial/peer.py: error importing: <TypeError> getattr(): attribute name must be string (error at pycompat.py:*) (glob)
-  mercurial/pure/mpatch.py: error importing module: <ImportError> cannot import name 'pycompat' (line *) (glob)
+  mercurial/pure/mpatch.py: error importing module: <ImportError> cannot import name 'policy' (line *) (glob)
   mercurial/pure/osutil.py: error importing module: <ImportError> cannot import name 'policy' (line *) (glob)
   mercurial/pure/parsers.py: error importing module: <ImportError> No module named 'mercurial.pure.node' (line *) (glob)
   mercurial/pushkey.py: error importing: <TypeError> getattr(): attribute name must be string (error at pycompat.py:*) (glob)
   mercurial/pvec.py: error importing: <TypeError> getattr(): attribute name must be string (error at pycompat.py:*) (glob)
   mercurial/registrar.py: error importing: <TypeError> getattr(): attribute name must be string (error at util.py:*) (glob)
-  mercurial/repair.py: error importing module: <SyntaxError> invalid syntax (bundle2.py, line *) (line *) (glob)
+  mercurial/repair.py: error importing: <TypeError> getattr(): attribute name must be string (error at util.py:*) (glob)
   mercurial/repoview.py: error importing: <TypeError> getattr(): attribute name must be string (error at util.py:*) (glob)
   mercurial/revlog.py: error importing: <TypeError> getattr(): attribute name must be string (error at util.py:*) (glob)
   mercurial/revset.py: error importing: <TypeError> getattr(): attribute name must be string (error at util.py:*) (glob)
@@ -169,6 +169,6 @@
   mercurial/verify.py: error importing: <TypeError> attribute name must be string, not 'bytes' (error at mdiff.py:*) (glob)
   mercurial/win32.py: error importing module: <ImportError> No module named 'msvcrt' (line *) (glob)
   mercurial/windows.py: error importing module: <ImportError> No module named '_winreg' (line *) (glob)
-  mercurial/wireproto.py: error importing module: <SyntaxError> invalid syntax (bundle2.py, line *) (line *) (glob)
+  mercurial/wireproto.py: error importing module: <TypeError> a bytes-like object is required, not 'str' (line *) (glob)
 
 #endif