view tests/test-topic-flow-single-head.t @ 6935:954d7ea5cd67 stable tip

stack: when stack base is obsolete, pick any successor, even if at random

There are situations when s0 is obsolete and we also cannot pick just one
successor for it to use in stack. In such a case, let's pick the "latest"
successor from the first set.

We're assuming that obsutil.successorssets() returns data in the same order (it
should, since it makes sure to sort data internally). Keeping that in mind,
while the successor picked for s0 by this code is not based on any sort of
sophisticated logic, it should nonetheless be the same every time.

This patch is probably not going to completely break anything that was
previously working fine, because the previous behavior was to just abort with
an exception.

=====================
Test workflow options
=====================

  $ . "$TESTDIR/testlib/topic_setup.sh"
  $ . "$TESTDIR/testlib/common.sh"

Test single head enforcing - Setup
=============================================

  $ hg init single-head-server
  $ cd single-head-server
  $ cat <<EOF >> .hg/hgrc
  > [phases]
  > publish = no
  > [experimental]
  > enforce-single-head = yes
  > evolution = all
  > EOF
  $ mkcommit ROOT
  $ mkcommit c_dA0
  $ cd ..

  $ hg clone single-head-server client
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

Test single head enforcing - with branch only
---------------------------------------------

  $ cd client

continuing the current defaultbranch

  $ mkcommit c_dB0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

creating a new branch

  $ hg up 'desc("ROOT")'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg branch branch_A
  marked working directory as branch branch_A
  (branches are permanent and global, did you want a bookmark?)
  $ mkcommit c_aC0
  $ hg push --new-branch
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)

Create a new head on the default branch

  $ hg up 'desc("c_dA0")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit c_dD0
  created new head
  (consider using topic for lightweight branches. See 'hg help topic')
  $ hg push -f
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: 2 heads on "default"
  (286d02a6e2a2, 9bf953aa81f6)
  [255]

remerge them

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ mkcommit c_dE0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files

Test single head enforcing - with topic
---------------------------------------

pushing a new topic

  $ hg topic foo
  marked working directory as topic: foo
  $ mkcommit c_dF0
  active topic 'foo' grew its first changeset
  (see 'hg help topics' for more information)
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

pushing a new topo branch (with a topic)

  $ hg up 'desc("c_dD0")'
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ hg topic bar
  marked working directory as topic: bar
  $ mkcommit c_dG0
  active topic 'bar' grew its first changeset
  (see 'hg help topics' for more information)
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)

detect multiple heads on the topic

  $ mkcommit c_dH0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  $ hg up 'desc("c_dG0")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit c_dI0
  $ hg push  -f
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: 2 heads on "default//bar"
  (5194f5dcd542, 48a01453c1c5)
  [255]

merge works fine

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ mkcommit c_dJ0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files

Test single head enforcing - by phase move
------------------------------------------

  $ hg -R ../single-head-server phase --public 'desc("c_dJ0")'
  abort: 2 heads on "default"
  (6ed1df20edb1, 678bca4de98c)
  [255]

Test single head enforcing - after rewrite
------------------------------------------

  $ hg up foo
  switching to topic foo
  3 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ hg commit --amend -m c_dF1
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 1 files (+1 heads)
  1 new obsolescence markers
  obsoleted 1 changesets