tests: adjust recent output changes for Windows

killdaemons: close pid file before killing processes With #serve enabled on Windows, I was getting occasional stacktraces like this: Errored test-hgweb-json.t: Traceback (most recent call last): File "./run-tests.py", line 724, in run self.tearDown() File "./run-tests.py", line 805, in tearDown killdaemons(entry) File "./run-tests.py", line 540, in killdaemons logfn=vlog) File "...\tests\killdaemons.py", line 94, in killdaemons os.unlink(pidfile) WindowsError: [Error 32] The process cannot access the file because it is being used by another process: '...\\hgtests.zmpqj3\\child80\\daemon.pids' Adrian suggested using util.posixfile, which works. However, the 'mercurial' package isn't in sys.path when invoking run-tests.py, and it isn't clear that hacking[1] it in is a good thing (especially for test-run-tests.t, which uses an installation in a temp folder). I tried using ProcessMonitor to figure out what the other process is, but that monitoring slows things down to such a degree that the issue doesn't occur. I was ready to blame the virus scanner, but it happens without that too. Looking at the code, I don't see anything that would have the pid file open. But I was able to get through about 20 full test runs without an issue with this minor change, whereas before it was pretty certain to hit this at least once in two or three runs. [1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-May/097907.html

win32: drop a py26 daemonizing hack I'm not sure what the referenced hang specifically was, but the whole test suite (with #serve) still runs on python 2.7.13. Aside from no longer prepending "cmd.exe /c", this backs out ca6aa8362f33. I'm trying to track down a rare failure of TerminateProcess() with an access error, and I've seen random extra python processes hanging around after running tests sometimes, so this might help. However, e48cb1c7a902 forces this change. Since the pid object is no longer converted to a string, the cmd.exe pid was being saved instead of the hg pid, and none of the daemons were being killed.

checkheads: simplify the code around obsolescence post-processing The 'discardedheads' return become unused and the relationship between newheads and newhs can be clarified. Our next goal here is to be able to extract the _postprocessobsolete call outside of the loop. We keep returning the 'discardedheads' because we'll start using it again soon in this series.

checkheads: drop now unused filtering of 'unsyncedheads' Now that unsynced heads are no longer in the function inputs or returns, we can simplify the code a bit.

checkheads: clarify that we no longer touch the head unknown locally Since c6cb21ddf74a, heads unknown locally no longer get any post processing from obsolescence markers. We clarify this fact by only feeding the list of locally known new heads to the function. This simplification of the input will help moving that post-processing earlier in the function.

headssummary: ensure all returned lists are sorted This is a simple step that will help to keep a stable output in coming refactoring.

discovery: also use lists for the returns of '_oldheadssummary' The '_headssummary' function is documenting and using list objects in its return. We now use them in _oldheadssummary too for consistency. This does not affect any usages of these values.

test: add a push race case where the updated head is obsoleted This is the mirror of the previously added case. We check the case where the racing-push obsoletes a head while the raced-push updates that same head.

test: add a push race case where obsoleted head is updated We check the case where the raced-push obsoletes a head while the racing-push updates that same head.