test-https: stabilize for Windows A leading '/' without a following drive letter is resolved to the location of the MSYS installation. These could be collapsed into a single line of output, but this seems more self documenting.

tagmerge: use workingfilectx to write merged tags This function already does an excellent job of reading from context objects; we simply need to change the single write call to eliminate all uses of the wvfs. As with past changes, the effect should be a no-op but opens the door to in-memory merge later by using different context objects.

run-tests: add color to output if pygments is available The output of run-tests has no formatting by default, which hampers readability. This patch colors the diff output when pygments is available. To avoid coloring even when pygments is available, use --color never.

win32: work around a WinError problem handling HRESULT types I ran into this ctypes bug while working with the Crypto API. While this could be an issue with any Win32 API in theory, the handful of things that we call are older functions that are unlikely to return COM errors, so I didn't retrofit this everywhere.

test-check-pyflakes: do not leave test.py in the repo Differential Revision: https://phab.mercurial-scm.org/D67

revset: add experimental ancestors/descendants relation subscript The relation name is 'generations' now, which may be changed in future.

revset: add experimental relation and subscript operators The proposed syntax [1] was originally 'set{n rel}', but it seemed slightly confusing if template is involved. On the other hand, we want to keep 'set[n]' for future extension. So this patch introduces 'set#rel[n]' ternary operator. I chose '#' just because it looks like applying an attribute. This also adds stubs for 'set[n]' and 'set#rel' operators since these syntax elements are fundamental for constructing 'set#rel[n]'. [1]: https://www.mercurial-scm.org/wiki/RevsetOperatorPlan#ideas_from_mpm

revset: do not compute weight for integer literal argument In x^n and x~n, n isn't a set expression. There's no need to optimize the right-hand side.

templatekw: export ui.paths as {peerpaths} It's sometimes useful to show hyperlinks in log output. "{get(peerpaths, "default")}/rev/{node}" Since each path may have sub options, "{peerpaths}" is structured as a dict of dicts, but the inner dict is rendered as if it were a string URL. The implementation is ad-hoc, so there are some weird behaviors described in the test. We might need to introduce a proper way of handling a hybrid scalar object. This patch adds _hybrid.__getitem__() so d['path']['url'] works. The keyword is named as "peerpaths" since "paths" seemed too generic in log context.

summary: fix type of empty unresolved list It was okay because tested as a boolean prior to calling len(), but looked incorrect.