tests/test-default-push.t

changegroup: store source and url in the `hookargs` dict

We store the source and url of the current data into `transaction.hookargs` this
let us inherit it from upper layers that may have created a much wider
transaction. We have to modify bundle2 at the same time to register the source
and url in the transaction. We have to do it in the same patch otherwise, the
`addchangegroup` call would fill these values and the hook calling will crash
because of the duplicated 'source' and 'url' arguments passed to the hook call.

  $ hg init a

  $ echo a > a/a
  $ hg --cwd a ci -Ama
  adding a

  $ hg clone a c
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg clone a b
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo b >> b/a
  $ hg --cwd b ci -mb

Push should provide a hint when both 'default' and 'default-push' not set:
  $ cd c
  $ hg push --config paths.default=
  pushing to default-push
  abort: default repository not configured!
  (see the "path" section in "hg help config")
  [255]

  $ cd ..

Push should push to 'default' when 'default-push' not set:

  $ hg --cwd b push
  pushing to $TESTTMP/a (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

Push should push to 'default-push' when set:

  $ echo '[paths]' >> b/.hg/hgrc
  $ echo 'default-push = ../c' >> b/.hg/hgrc
  $ hg --cwd b push
  pushing to $TESTTMP/c (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files