discovery: fix docstring of `outgoing` class
Also, introduce a more correct name `ancestorsof` for what was named
`missingheads` before. For now, we just forward `ancestorsof` to `missingheads`
until all users are changed.
There were some mistakes in the old docstring / name:
* `missingheads` (new name: `ancestorsof`) contains the revs whose ancestors
are included in the outgoing operation. It may contain non-head revs and revs
which are already on the remote, so the name "missingheads" is wrong in two
ways.
* `missing` contains only ancestors of `missingheads`, so not *all nodes*
present in local but not in remote.
* `common` might not contain all common revs, e.g. not some that are not an
ancestor of `missingheads`.
It seems like the misleading name have fostered an actual bug (
issue6372),
where `outgoing.missingheads` was used assuming that it contains the heads of
the missing changesets.
#require svn13
$ cat <<EOF >> $HGRCPATH
> [extensions]
> mq =
> [diff]
> nodates = 1
> [subrepos]
> allowed = true
> svn:allowed = true
> EOF
fn to create new repository, and cd into it
$ mkrepo() {
> hg init $1
> cd $1
> hg qinit
> }
handle svn subrepos safely
$ svnadmin create svn-repo-2499
$ SVNREPOPATH=`pwd`/svn-repo-2499/project
$ SVNREPOURL="`"$PYTHON" $TESTDIR/svnurlof.py \"$SVNREPOPATH\"`"
$ mkdir -p svn-project-2499/trunk
$ svn import -qm 'init project' svn-project-2499 "$SVNREPOURL"
qnew on repo w/svn subrepo
$ mkrepo repo-2499-svn-subrepo
$ svn co "$SVNREPOURL"/trunk sub
Checked out revision 1.
$ echo 'sub = [svn]sub' >> .hgsub
$ hg add .hgsub
$ hg status -S -X '**/format'
A .hgsub
$ hg qnew -m0 0.diff
$ cd sub
$ echo a > a
$ svn add a
A a
$ svn st
A* a (glob)
$ cd ..
$ hg status -S # doesn't show status for svn subrepos (yet)
$ hg qnew -m1 1.diff
abort: uncommitted changes in subrepository "sub"
[255]
$ cd ..