pgp: force protocol/micalg ordering in doctest output.

[pgp-mime.git] / README

diff --git a/README b/README
index ea9875480714b152da9c35bc77e381eb1ebc1b2c..81219c5aaee8078b264c5a4d29f9eacfdf2d38d4 100644 (file)
--- a/README
+++ b/README
@@ -24,7 +24,7 @@ Dependencies
 ------------
 
 ``pgp-mime`` is a simple package with no external dependencies outside
-the Python 3 standard library.  There are a number of GnuPG_ wrappers
+the Python 3.3 standard library.  There are a number of GnuPG_ wrappers
 for python `out there`__, but none of them seem mature/stable enough
 to be worth installing.  Instead, we use the `pyassuan`_ module to
 talk to `gpgme-tool`_ over pipes or sockets.  If this isn't working
@@ -33,6 +33,12 @@ the cryptography.
 
 __ wrappers_
 
+It would be awkward to backport ``pgp-mime`` to earlier versions of
+Python, because versions before Python 3.3 lack sendmsg_ and recvmsg_,
+and Python 2.7 doesn't even have that pass_fds option for Popen.  This
+makes it much harder to pass file descriptors to the `gpgme-tool`
+process.
+
 Installing by hand
 ------------------
 
@@ -114,7 +120,7 @@ Run the internal unit tests using nose_::
 If a Python-3-version of ``nosetests`` is not the default on your
 system, you may need to try something like::
 
-  $ nosetests-3.2 --with-doctest --doctest-tests pgp_mime
+  $ nosetests-3.3 --with-doctest --doctest-tests pgp_mime
 
 Licence
 =======
@@ -136,6 +142,9 @@ wking@tremily.us
 .. _pyassuan: http://blog.tremily.us/posts/pyassuan/
 .. _gpgme-tool:
   http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=blob;f=src/gpgme-tool.c;hb=HEAD
+.. _Popen: http://docs.python.org/py3k/library/subprocess.html#subprocess.Popen
+.. _sendmsg: http://docs.python.org/dev/library/socket.html#socket.socket.sendmsg
+.. _recvmsg: http://docs.python.org/dev/library/socket.html#socket.socket.recvmsg
 .. _Git: http://git-scm.com/
 .. _homepage: http://blog.tremily.us/posts/pgp-mime/
 .. _wrappers and pinentry program: http://blog.tremily.us/posts/gpg-agent/