debian: switch to using debhelper and dh_python2 to build debs This is a much larger commit than I'd like, but I honestly don't see a good way to break it up and leave things working. Summary: We now use debian/rules with debhelper to build our debs. This is much more standard, and means we use dh_python2 to do things like handle leaving .pyc files out of the built debs. The resulting package is split into mercurial and mercurial-common, with the former being the hg stub and all the native .sos, and the latter being basically everything else. builddeb and dockerdeb are updated to use the new system. The old way (using dpkg by hand) breaks with the above changes because debian/control no longer contains a version string (that's now guessed from the phony changelog.) Tests are updated to assert that the right files end up in the right debs.

test-debian-packages: new test for testing construction of debian packages

test-docker-packaging: test packages built using docker For now this only tests debian packages, but it could easily be extended to also test rpms.

hghave: correct test for debhelper debhelper exits with a nonzero status when you pass --help, at least on jessie.

bundle2: don't try to recover from a GeneratorExit (issue4785) GeneratorExit means the other end of the conversation has already stopped listening, so don't try and yield out error information. Instead, just let the GeneratorExit propagate normally. This should resolve esoteric issues observed with servers that have aggressive timeouts waiting for data to send to clients logging internal Python errors[0]. This has been observed with both gunicorn's gevent worker model and with scm-manager's built-in webserver (which itself is something sitting inside jetty.) 0: Exception RuntimeError: 'generator ignored GeneratorExit' in <generator object getchunks at 0x7fd2f6c586e0> ignored

revset: fix resolving strings from a list When using multiple revsets that get optimized into a list (like hg log -r r1235 -r r1237 in hgsubversion), the revset list code was assuming the strings were resolvable via repo[X]. hgsubversion and other extensions override def stringset() to allow processing different revision identifiers (such as r1235 or g<githash>), and there for the _list() implementation was circumventing that resolution. The fix is to just call stringset(). The default implementaiton does the same thing that _list was already doing (namely repo[X]). This has always been broken, but it was recently exposed by 4ee4f7415095 which made "--rev X --rev Y" produce a combined revset "X | Y".