Fully refactored subprocess handling on all platforms.
Now we have all process-related code in utils.process, which itself
imports from platform-specific files as needed.
On posix, we have reliable asynchronous delivery of stdout and stderr,
and on win32 at least we have the basics that subprocess.py provides,
since pexpect is not available.
We also now support robust killing of subprocesses that may capture
SIGINT: one SIGINT on our end is sent to the subprocess, but then we
kill it, to prevent a rogue subprocess from hijacking the ipython
console.
Note that on posix, we now depend on pexpect, but we ship our own copy
to users which we'll use if there's no system pexpect installed.
UNC path handling for windows was implemented as a context manager
called AvoidUNCPath.
Make our temp file mixin unittest-friendly.
This does not break any nose compatibility, but it lets us use our
mixin with normal unittest.TestCase objects in addition to
nose-oriented tests. We're trying to lower our dependency on
specifics of the nose api, so that in the future we might be able to
run without nose at all (as unittest improves).
Add pexpect version 2.3 (revision 507) to IPython.external.
We will only use our copy if the system-installed one isn't found.
This lets us run the core of ipython on top of the stdlib, while
having far better subprocess control than we otherwise would on posix.
On windows, pexpect doesn't exist, so the subprocess situation is
still not ideal.
pexpect is MIT-licensed.
For more information on pexpect:
http://www.noah.org/wiki/Pexpect
Remove shell hook and system_verbose magic.
This is the first step of a cleanup and rationalization of our
subprocess management, so we can use a single, uniform interface for
subprocess execution across our codebase.
Brian Granger
Fernando Perez
epatters