vfs: add "makelock()" and "readlock()"

hg: rewrite "copystore()" with vfs This patch rewrites "copystore()" with vfs, because succeeding patch requires "lock.lock()" invocation with vfs. This patch uses 'dstbase + "/lock"' instead of "join()" with both elements even on Windows environment but it should be reasonable, because target files given from "store.copyfiles()" already uses "/" as path separator. "util.copyfiles()" between two vfs-s may have to be rewritten in the future.

localrepo: import "lock" module as "lockmod" for readability Before this patch, "localrepo.py" has many methods defining local variable "lock", even though it imports "lock" module as "lock". This ambiguity decreases readability.

transaction: take journal file path relative to vfs to use file API via vfs

vfs: add "chmod()"

vfs: add "isfile()"

transaction: unlink target file via vfs Before this patch, unlink target file is once opened before unlinking, because "opener" before vfs migration doesn't have "unlink()" function. This patch uses "vfs.unlink()" instead of "open()" and "fp.name".

relink: abort earlier when on different devices (issue3916) Add a first check of the devices before collecting candidate files. This is much quicker when big repos are on different devices. Keep the existing check in prune. It checks for same device of the files. This could probably be different in a special repo store (with symlinks).

localrepo: prevent to copy repo local config, copy baseui instead Copying a repos local configuration to another repo is a bad idea because the 2nd repo gets the configuration of the first. Prevent this by really calling repo.baseui.copy when repo.ui.copy is called. This requires some changes in commandserver which needs to clone repo.ui for rejecting temporary changes. This patch has its roots back in the topic "repo isolation" around f0564402d059 and was suggested by mpm.

doc: show details of command options in pages generated by docutils Before this patch, HTML/man pages generated by docutils don't show details of each command options, whether it should take argument or not for example, even though "hg help" does. This patch shows details of command options as same as "hg help" shows. This patch uses "--option <VALUE[+]>" style instead of "--option <VALUE> [+]" used in output of "hg help", because docutils requires that option argument strings starts with "<" and ends with ">".

Makefile: intermediate steps work with temporary copy of hg.pot In case of abortion or a failing step, the target file remains untouched instead of being in an intermediate state.

merge with stable

help: drop help for branches template keyword The {branches} keyword dates to pre-1.0 Mercurial's tag-like branch scheme which allowed changesets to be on multiple branches. This is the last visible vestige of that scheme, users should instead be using {branch}, possibly with if().

test-command-template.t: fix failure due to trailing whitespace

templater: makes branches work correctly with stringify (issue4108)

manifest: increase lrucache from 3 to 4 During a commit amend there are 4 manifests being handled: - original commit - temporary commit - amended commit - merge base This causes a manifest cache miss which hurts perf on large repos. On a large repo, this fix causes amend to go from 6 seconds to 5.5 seconds.

strip: add faster revlog strip computation The previous revlog strip computation would walk every rev in the revlog, from the bottom to the top. Since we're usually stripping only the top few revs of the revlog, this was needlessly expensive on large repos. The new algorithm walks the exact number of revs that will be stripped, thus making the operation not dependent on the number of revs in the repo. This makes amend on a large repo go from 8.7 seconds to 6 seconds.

revlog: return lazy set from findcommonmissing When computing the commonmissing, it greedily computes the entire set immediately. On a large repo where the majority of history is irrelevant, this causes a significant slow down. Replacing it with a lazy set makes amend go from 11 seconds to 8.7 seconds.

merge with stable

histedit: hold wlock and lock while in progress Currently, histedit acquires and releases lock and wlock several times during its run. This isn't great because it allows other hg processes to come in and change state. With this fix, lock and wlock are acquired and released exactly once. The change to test-histedit-drop.t is a minor implementation one -- the cache is still correctly invalidated, but it just happens a little later and only gets printed out because of the unrelated --debug flag.

merge with i18n

i18n-pt_BR: fix typos in notify docs

i18n-pt_BR: synchronized with 06e118c097ff

templater: only recursively evaluate string literals as templates (issue4103)

templater: fix escaping in nested string literals (issue4102) Before the templater got extended for nested expressions, it made sense to decode string escapes across the whole string. Now we do it on a piece by piece basis.

merge with stable

shelve: unshelve using an unfiltered repository when evolve is enabled and a hidden obsolete changeset exists in the repository, the strip during unshelve will fail due to filtered revs. we use an unfiltered repository like to repair.strip to strip the proper nodes.

largefiles: update in two steps, handle interrupted updates better An update would try to fetch any missing largefiles after having updated normal files and standins. That could fail or be interrupted and would leave the working directory in a state where the largefiles not only were missing but also were scheduled for remove ... and where the old largefile was left in place. Instead we now remove old largefiles before starting to download and update missing largefiles.

largefiles: inline _updatelfile, prepare for further refactorings

largefiles: cache largefiles for update, also without printmessage