revlog: optionally cache the full text when adding revisions revlog instances can cache the full text of a single revision. Typically the most recently read revision is cached. When adding a delta group via addgroup() and _addrevision(), the full text isn't always computed: sometimes only the passed in delta is sufficient for adding a new revision to the revlog. When writing the changelog from a delta group, the just-added full text revision is always read immediately after it is written because the changegroup code needs to extract the set of files from the entry. In other words, revision() is *always* being called and caching the full text of the just-added revision is guaranteed to result in a cache hit, making the cache worthwhile. This patch adds support to _addrevision() for always building and caching the full text. This option is currently only active when processing changelog entries from a changegroup. While the total number of revision() calls is the same, the location matters: buildtext() calls into revision() on the base revision when building the full text of the just-added revision. Since the previous revision's _addrevision() built the full text and the the previous revision is likely the base revision, this means that the base revision's full text is likely cached and can be used to compute the current full text from just a delta. No extra I/O required. The end result is the changelog isn't opened and read after adding every revision from a changegroup. On my 2013 MacBook Pro running OS X 10.10.5 from an SSD and Python 2.7, this patch impacted the time taken to apply ~262,000 changesets from a mozilla-central gzip bundle: before: ~43s after: ~32s ~25% reduction in changelog processing times. Not bad.

revlog: drop local assignment of cache variable The purpose of this code was to provide thread safety. With the conversion of hgweb to use separate localrepository instances per request/thread, we should no longer have any consumers that need to access revlog instances from multiple threads. Remove the code.

revlog: rename generic "i" variable to "indexdata" Increase readability.

hg: always create new localrepository instance cachedlocalrepo.copy() didn't actually create new localrepository instances. This meant that the new thread isolation code in hgweb wasn't actually using separate localrepository instances, even though it was properly using separate cachedlocalrepo instances. Because the behavior of the API changed, the single caller in hgweb had to be refactored to always call _webifyrepo() or it may not have used the proper filter. I confirmed via print() debugging that id(repo) is in fact different on each thread. This was not the case before. For reasons I can't yet explain, this does not fix issue4756. I suspect there is shared cache somewhere that isn't thread safe.

test-bad-extension: reduce dependencies on other things test-bad-extension would jitter if the format of the first line of hg help changed, which isn't relevant to its goal.

help: fix help argument parsing and documentation support combining -c and -e previously -k was misdocumented: * the first line didn't mention it * the help half implied you could do help -k keyword topic with these changes, -k just changes the search method support -c and -e for -k searches

minirst: establish leveling for nested definitions

dispatch: use the right context manager to deactivate demandimport In e86d12404d69 I very embarrassingly wrote a patch with the completely wrong function name. This should fix it.

ui: improve docs on ui.log This makes the documentation on ui.log line up with the use of that interface in blackbox.

templater: switch ctx of list expression to rev of revset() (BC) Because revset() function generates a list of revisions, it seems sensible to switch the ctx as well where a list expression will be evaluated. I think "{revset(...) % "..."}" expression wasn't considered well when it was introduced at cda9d2b6beab.