completion: add a debuglabelcomplete command
When completing a "label" (a symbolic name for a commit), the
bash_completion script currently has to invoke hg three times. For
a large repository, the cost of starting up and loading all the
necessary context over and over is very high.
For instance, in mozilla-central:
time (export HGPLAIN=1; hg tags -q; hg bookmarks -q; hg branches) >/dev/null
0.446 sec
Compare with the debuglabelcomplete command that this commit adds:
time hg debuglabelcomplete >/dev/null
0.148 sec
This greatly helps responsiveness.
run-tests: only sort files when not given as argument
os.listdir returns the files in any order. This has to be sorted.
But when given as argument, the user should be allowed to set any order.
This restores the behaviour before
9848a94e2a.
blackbox: use util.getuser for portability
On Windows, our implementation is more robust than Python's version.
blackbox: prevent failed I/O from causing hg to abort
Instead, we simply print a warning message if opening the blackbox log
file fails, or if writing to it fails.
largefiles: don't query the dirstate for key None
lfutil.splitstandin(f) can be None, and we query the dirstate for that without
checking if it is. This will cause problems with the upcoming move to critbit-
based dicts, since they only support strings as keys.
bookmarks: moving the active bookmark deactivates it
After this change, moving the active bookmark somewhere other than the
current changeset (i.e., with --rev) deactivates it. Previously it would
remain in .hg/bookmarks.current, which seems like a bug.