bookmarks: allow pushkey if new equals current
Previously a bookmark pushkey would be rejected if the specified 'old' value
didn't match the servers 'current' value. This change allows this situation, as
long as the 'current' server value equals the 'new' pushkey value already.
We are trying to write a hook that forces a server bookmark to move forward,
using a changegroup hook. If the user also pushed the bookmark, they would get
an error, since they computed their pushkey (old,new) pair before the server
moved the bookmark. Long term, bundle2 will let us do this more smartly, but
this change seems reasonable for now.
$ hg init repo
$ cd repo
$ touch foo
$ hg ci -Am 'add foo'
adding foo
$ hg up -C null
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
this should be stored as a delta against rev 0
$ echo foo bar baz > foo
$ hg ci -Am 'add foo again'
adding foo
created new head
$ hg debugindex foo
rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 0 ..... 0 b80de5d13875 000000000000 000000000000 (re)
1 0 24 ..... 1 0376abec49b8 000000000000 000000000000 (re)
$ cd ..