view tests/test-push-checkheads-superceed-A8.t @ 37414:2d965bfeb8f6

wireproto: allow direct stream processing for unbundle

Introduce a new option server.streamunbundle which starts a transaction
immediately to apply a bundle instead of writing it to a temporary file
first. This side steps the need for a large tmp directory at the cost of
preventing concurrent pushes. This is a reasonable trade-off for many
setups as concurrent pushes for the main branch at least are disallowed
anyway. The option defaults to off to preserve existing behavior.

Change the wireproto interface to provide a generator for reading the
payload and make callers responsible for consuming all data.

Differential Revision: https://phab.mercurial-scm.org/D2470

====================================
Testing head checking code: Case A-8
====================================

Mercurial checks for the introduction of new heads on push. Evolution comes
into play to detect if existing branches on the server are being replaced by
some of the new one we push.

This case is part of a series of tests checking this behavior.

Category A: simple case involving a branch being superceeded by another.
TestCase 8: single-changeset branch indirect rewrite

.. old-state:
..
.. * 1-changeset branch
..
.. new-state:
..
.. * 1-changeset branch succeeding to A, through another unpushed changesets
..
.. expected-result:
..
.. * push allowed
..
.. graph-summary:
..
..       A'
..   A ø⇠ø⇠◔ A''
..     |/ /
..     | /
..     |/
..     ●

  $ . $TESTDIR/testlib/push-checkheads-util.sh

Test setup
----------

  $ mkdir A8
  $ cd A8
  $ setuprepos
  creating basic server and client repo
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd client
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit A1
  created new head
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit A2
  created new head
  $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
  obsoleted 1 changesets
  $ hg debugobsolete `getid "desc(A1)" ` `getid "desc(A2)"`
  obsoleted 1 changesets
  $ hg log -G --hidden
  @  c1f8d089020f (draft): A2
  |
  | x  f6082bc4ffef (draft): A1
  |/
  | x  8aaa48160adc (draft): A0
  |/
  o  1e4be0697311 (public): root
  

Actual testing
--------------

  $ hg push
  pushing to $TESTTMP/A8/server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  2 new obsolescence markers
  obsoleted 1 changesets

  $ cd ../..