revset: add helper to build balanced addsets from chained 'or' operations
This function will be used by revset.orset() and scmutil.revrange() to reduce
the stack depth from O(n) to O(log(n)).
We've bikeshed the interface of this function, but we couldn't come to an
agreement. So we decided to attempt to make it move forward.
marmoute:
- new factory function isn't necessary for balanced addsets
- addset.__init__ can just recurse, should handle "len(subsets) == 2+"
yuja:
- want to write all "len(subsets) == 0, 1, 2, 3+" cases in the same function
- no recursion in __init__ for cosmetic reason: can't return, can't call
__init__ directly
I've changed it to a private function so that nobody would be tempted to
utilize it.
http://mercurial.selenic.com/bts/issue1502
Initialize repository
$ hg init foo
$ touch foo/a && hg -R foo commit -A -m "added a"
adding a
$ hg clone foo foo1
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo "bar" > foo1/a && hg -R foo1 commit -m "edit a in foo1"
$ echo "hi" > foo/a && hg -R foo commit -m "edited a foo"
$ hg -R foo1 pull -u
pulling from $TESTTMP/foo (glob)
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
not updating: not a linear update
(merge or update --check to force update)
$ hg -R foo1 book branchy
$ hg -R foo1 book
* branchy 1:e3e522925eff
Pull. Bookmark should not jump to new head.
$ echo "there" >> foo/a && hg -R foo commit -m "edited a again"
$ hg -R foo1 pull
pulling from $TESTTMP/foo (glob)
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
(run 'hg update' to get a working copy)
$ hg -R foo1 book
* branchy 1:e3e522925eff