cmdutil: reimplement finddate() without using walkchangerevs() It's simpler and slightly faster maybe because a fewer Python ops would run. Unscientific benchmark: $ python -m timeit \ -s 'from mercurial import hg, ui, cmdutil; repo = hg.repository(ui.ui())' \ 'cmdutil.finddate(repo.ui, repo, "<2008-01-01")' (orig) 10 loops, best of 3: 1.45 sec per loop (new) 10 loops, best of 3: 1.25 sec per loop Now "hg churn" and "hg grep" are the only users of walkchangerevs(), which I want to refactor and fix bugs.

test-simple-update: add test for -d DATE option I couldn't find any tests for cmdutil.finddate() except for the abort case.

largefiles: walk history in ascending order while downloading all lfiles I don't think the order matters. Maybe it's purely because of the use of walkchangerevs(), which was originally designed for "hg log" command. Surprisingly, the number of objects fetched in test-largefiles.t has changed. According to the --verbose output, the order of the following fetches flipped and the latter got deduplicated. getting large3:eb7338044dc27f9bc59b8dd5a246b065ead7a9c4 found eb7338044dc27f9bc59b8dd5a246b065ead7a9c4 in store getting sub/large4:eb7338044dc27f9bc59b8dd5a246b065ead7a9c4 found eb7338044dc27f9bc59b8dd5a246b065ead7a9c4 in store

largefiles: replace use of walkchangerevs() with simple revset query Since it does nothing in prepare(), what we're doing is just walking revisions matching ".hglf" in reverse order.