testing: allow Hypothesis tests to disable extensions Doing this required the introduction of a mechanism for keeping track of more general config in the test. At present this is only used for extensions but it could be used more widely (e.g. to control specific extension behaviour) This greatly simplifies the extension management logic by introducing a general notion of config, which we maintain ourselves and pass to HG on every invocation. This results in significantly less error prone test generation, and also allows us to turn extensions off as well as on. The logic that used an environment variable to rerun the tests with an extension disabled now just edits the test file (in a fresh copy) to remove these --config command line flags.

keepalive: remove useless parentheses around exception type

chgserver: add a structure for confighash and mtimehash confighash and mtimehash are often used together. This patch adds a simple structure called hashstate to store them. hashstate also has a handly method called fromui to calculate the hashes from a ui object.

chgserver: add utilities to calculate mtimehash mtimehash is designed to detect file changes. These files include: - single file extensions (__init__.py for complex extensions) - mercurial/__version__.py - python (sys.executable) mtimehash only uses stat to check files so it's fast but not 100% accurate. However it should be good enough for our use case. For chgserver, once mtimehash changes, the server is considered outdated immediately and should no longer provide service.

tests: rename 'test-module-import.t' into 'test-check-module-import.t' This test is checking our source code to ensure style and correct behavior (eg: no cycle). Current convention is that such tests starts with 'test-check-' so we flock this on back with the others.

pull: deactivate a bookmark not matching with the destination of the update Before this patch, "hg pull -u" with a target doesn't deactivate a current active bookmark, which doesn't match with the explicit destination of the update, even though bare "hg update" does so. A "target" can be provided through: - option --rev ANOTHER - option --branch ANOTHER - source URL#ANOTHER

pull: activate a bookmark matching with the destination of the update (BC) Before this patch, "hg pull -u" with a target doesn't activate a bookmark, which matches with the explicit destination of the update, even though bare "hg update" does so. A "target" can be provided through: - option --rev BOOKMARK - source URL#BOOKMARK

revset: define "pat" variable unconditionally in subrepo() It's a source of UnboundLocalError to define and use local variables conditionally. As getstring() always returns a str, "pat" can be initialized to None.

revset: drop translation markers from error messages of internal _matchfiles They are a sort of debug messages, which should never be visible to end users.

templatekw: switch ctx of list expression to rev of {parents} (BC) This is the same semantics as revset() introduced at e4609ec959f8. Before this patch, {parents} provided nothing useful in new-style template. For example, '{parents % "{parent}"}' generated cryptic string like "rev12345node0123abcdef...". This patch drops {parent} variable since it was useless. We can get a revision number by '{parents % "{rev}"}'.