Store empty (default) branch in branch cache, too.
Operations on this branch don't work otherwise.
Reading branches.cache had to be adjusted to allow an empty label.
Adjusted reading of the cache tip for symmetry, no functional change here.
# creating 'remote'
# repo not found error
remote: abort: repository nonexistent not found!
abort: no suitable response from remote hg!
# clone remote via stream
streaming all changes
XXX files to transfer, XXX bytes of data
transferred XXX bytes in XXX seconds (XXX XB/sec)
XXX files updated, XXX files merged, XXX files removed, XXX files unresolved
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 1 changesets, 2 total revisions
# clone remote via pull
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 2 changes to 2 files
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
# verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 1 changesets, 2 total revisions
# empty default pull
default = ssh://user@dummy/remote
pulling from ssh://user@dummy/remote
searching for changes
no changes found
# local change
# updating rc
# find outgoing
searching for changes
changeset: 1:572896fe480d
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add
# find incoming on the remote side
searching for changes
changeset: 1:572896fe480d
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add
# push
pushing to ssh://user@dummy/remote
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
# check remote tip
changeset: 1:572896fe480d
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 2 changesets, 3 total revisions
bleah
# push should succeed
pushing to ssh://user@dummy/remote
searching for changes
note: unsynced remote changes!
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
Got arguments 1:user@dummy 2:hg -R nonexistent serve --stdio 3: 4: 5:
Got arguments 1:user@dummy 2:hg -R remote serve --stdio 3: 4: 5:
Got arguments 1:user@dummy 2:hg -R remote serve --stdio 3: 4: 5:
Got arguments 1:user@dummy 2:hg -R remote serve --stdio 3: 4: 5:
Got arguments 1:user@dummy 2:hg -R remote serve --stdio 3: 4: 5:
Got arguments 1:user@dummy 2:hg -R local serve --stdio 3: 4: 5:
Got arguments 1:user@dummy 2:hg -R remote serve --stdio 3: 4: 5:
changegroup in remote: u=remote:ssh:127.0.0.1
Got arguments 1:user@dummy 2:hg -R remote serve --stdio 3: 4: 5:
changegroup in remote: u=remote:ssh:127.0.0.1