Gregory Szorc <gregory.szorc@gmail.com> [Sat, 05 Dec 2015 20:20:57 -0800] rev 27252
ui: add method to return option and all sub-options
Apparently ":" has been blessed as a generic separator for
options and sub-options. We formalize this by introducing an API
for obtaining an option and all its sub-options.
This will be used in a subsequent patch for declaring sub-options
for [paths].
Martin von Zweigbergk <martinvonz@google.com> [Fri, 04 Dec 2015 17:46:56 -0800] rev 27251
revlog: don't consider nullrev when choosing delta base
In the most complex case, we try using the incoming delta base, then
we try both parents, and then we try the previous revlog entry. If
none of these result in a good delta, we natually use the null
revision as base. However, we sometimes consider the nullrev before we
have exhausted our other options. Specifically, when both parents are
null, we use the nullrev as delta base if it produces a good delta
(according to _isgooddelta()), and we fail to try the previous revlog
entry as delta base. After 20a9226bdc8a (addrevision: use general
delta when the incoming base delta is bad, 2015-12-01), it can also
happen for non-merge commits when the incoming delta is not good.
The Firefox repo (from many months back) shrinks a tiny bit with this
patch: from 1.855GB to 1.830GB (1.4%). The hg repo itself shrinks even
less: by less than 0.1%. There may be repos that get larger instead.
This undoes the unexplained test change in 20a9226bdc8a.
Martin von Zweigbergk <martinvonz@google.com> [Fri, 04 Dec 2015 17:14:14 -0800] rev 27250
revlog: make calls to _isgooddelta() consistent
We always want to call _isgooddelta() before accepting a delta. We
mostly call the function right after building the delta, but not
always. Instead, we have an extra call at the end of the big code
block. Let's make it consistent, so we call _isgooddelta() right after
builddelta() and exactly once per delta. That also lets us rely on
"delta is None" to mean we didn't find a good delta.