revlog: always process opener options I'm not sure when ``opener.options`` would ever be explicitly set to None. It is definitely not possible to construct a repo this way because ``localrepo.resolvestorevfsoptions()`` always returns a dict and ``localrepo.makelocalrepository()`` always sets ``opener.options`` to this value. Because we always execute this code now, if options are empty we defaulted to creating version 0 revlogs. So we had to change the code slightly to fall back to the default revlog version and flags. As astute reader will note that it is not possible to create version 0 revlogs now. However, I don't think it was possible before, as this required ``opener.options`` being unset, which I don't think was possible. I suspect this means our test coverage for version 0 revlog repositories is possibly non-existent! Since I don't see a config option to disable revlog v1, I'm not even sure if we had a way to create new repos with version 0 revlogs! Who knows. Differential Revision: https://phab.mercurial-scm.org/D5559

internals: minor rewriting of revlogs documentation In preparation for formalizing revlog version 2. Differential Revision: https://phab.mercurial-scm.org/D5558

tests: make HGCATAPULTSERVERPIPE imply HGTESTCATAPULTSERVERPIPE I had attempted to do this before, but missed this case. This makes it so that one can do the following to get catapult traces that include both the .t test name (and non-hg commands run by that .t test) *and* the hg-internal tracing, in one trace: HGCATAPULTSERVERPIPE=/tmp/catapult.pipe run-tests.py <args> Without this change, we need to specify both `HG{,TEST}CATAPULTSERVERPIPE`; if we specify just the TEST one, we only get the .t tests (no hg-internals), which is working as intended. If we specify the non-TEST one, we only get the hg-internals (not the rest of the .t test), which was not intended. If you want to restore the previous behavior (just hg internals, not the stuff from the .t tests), run like: HGTESTCATAPULTSERVERPIPE=/dev/null \ HGCATAPULTSERVERPIPE=/tmp/catapult.pipe \ run-tests.py <args> Differential Revision: https://phab.mercurial-scm.org/D5569