match: making visitdir() deal with non-recursive entries Primarily as an optimization to avoid recursing into directories that will never have a match inside, this classifies each matcher pattern's root as recursive or non-recursive (erring on the side of keeping it recursive, which may lead to wasteful directory or manifest walks that yield no matches). I measured the performance of "rootfilesin" in two repos: - The Firefox repo with tree manifests, with "hg files -r . -I rootfilesin:browser". The browser directory contains about 3K files across 249 subdirectories. - A specific Google-internal directory which contains 75K files across 19K subdirectories, with "hg files -r . -I rootfilesin:REDACTED". I tested with both cold and warm disk caches. Cold cache was produced by running "sync; echo 3 > /proc/sys/vm/drop_caches". Warm cache was produced by re-running the same command a few times. These were the results: Cold cache Warm cache Before After Before After firefox 0m5.1s 0m2.18s 0m0.22s 0m0.14s google3 dir 2m3.9s 0m1.57s 0m8.12s 0m0.16s Certain extensions, notably narrowhg, can depend on this for correctness (not trying to recurse into directories for which it has no information).

match: adding support for matching files inside a directory This adds a new "rootfilesin" matcher type which matches files inside a directory, but not any subdirectories (so it matches non-recursively). This has the "root" prefix per foozy's plan for other matchers (rootglob, rootpath, cwdre, etc.).

runtests: add an IPv6 command line flag Now we have all IPv6 related issues fixed, add a command line flag so people could actually run tests with IPv6.

runtests: always set web.ipv6 Previously, we only set web.ipv6 if IPv6 is used, but not on the IPv4 case. Since we already have set web.address, it makes sense to move "web.ipv6" out from "extra config options".

runtests: set web.address to localhost Previously, "hg serve" will listen on "", which is not clear which interface it will actually listen on - it could listen on all interfaces (ex. 0.0.0.0 on IPv4). The run-tests.py script only checks "localhost" for available ports. So let's make it the same for "hg serve" by explicitly setting "web.address" to "localhost". This resolves some IPv6 EADDRINUSE errors.

tests: use LOCALIP This patch replaces hardcoded 127.0.0.1 with $LOCALIP in all tests. Till now, the IPv6 series should make tests pass on common IPv6 systems where the local device has the address "::1" and the hostname "localhost" resolves to "::1".