journal: rename on disk files to 'namejournal' The 'journal' naming is already used by the transaction journal. Having an unrelated group of file with such a close naming is confusing and error prone. We rename the file used by the 'journal' extension to use 'namejournal' as the extension track the location of various 'names'.

tests: guard demandimport segment of test-extension.t

tests: skip demandimport if disabled demandimport and setuptools and decorator (from ironpython) and pygments leads to lots of fail. If demandimport is disabled we should skip testing it...

hghave: add demandimport checking

hghave: make bzr checks stricter My bzr does not have bzrlib.revisionspec.RevisionSpec, and thus tests were failing because convert refused to believe in bzr, but hghave without this change thought it was available.

help: document wire protocol commands

help: document wire protocol "handshake" protocol There isn't a formal handshake protocol in the wire protocol. But clients almost certainly need to perform particular actions before they can communicate with a server optimally. So document what that is so people understand what's going on at connection establishment time.

help: document wire protocol capabilities All capabilities from the history of the project are now documented.

crecord: properly handle files with No newline at eof (issue5268) Yes, this bug was a single character with the wrong case...

annotate: pre-calculate the "needed" dictionary (issue5360) The "needed" dict is used as a reference counter to free items in the giant "hist" dict. However, currently it is not very accurate and can lead to dropping "hist" items unnecessarily, for example, with the following DAG, -3- / \ 0--1--2--4-- The current algorithm will visit and calculate rev 1 twice, undesired. And it tries to be smart by clearing rev 1's parents: "pcache[1] = []" at the time hist[1] being accessed (note: hist[1] needs to be used twice, by rev 2 and rev 3). It can result in incorrect results if p1 of rev 4 deletes chunks belonging to rev 0. However, simply removing "needed" is not okay, because it will consume 10x memory: # without any change % HGRCPATH= lrun ./hg annotate mercurial/commands.py -r d130a38 3>&2 [1] MEMORY 49074176 CPUTIME 9.213 REALTIME 9.270 # with "needed" removed MEMORY 637673472 CPUTIME 8.164 REALTIME 8.249 This patch moves "needed" (and "pcache") calculation to a separate DFS to address the issue. It improves perf and fixes issue5360 by correctly reusing hist, while maintaining low memory usage. Some additional attempt has been made to further reduce memory usage, like changing "pcache[f] = []" to "del pcache[f]". Therefore the result can be both faster and lower memory usage: # with this patch applied MEMORY 47575040 CPUTIME 7.870 REALTIME 7.926 [1]: lrun is a lightweight sandbox built on Linux cgroup and namespace. It's used to measure CPU and memory usage here. Source code is available at github.com/quark-zju/lrun.