view tests/test-topic-flow-publish-flag.t @ 3846:f9dad99a90d5

evolve: create a new commit instead of amending one of the divergents

This patch changes the behavior of evolve command while resolving
content-divergence to create a new commit instead of amending one of the
divergent ones.

In past, I have made this change, backed out this change and now today again I
am doing this change, so let's dive in some history.

Using cmdrewrite.amend() was never a good option as that requires hack to delete
the evolvestate and also gives us less control over things. We can't make the
commit on top of different parents as that of content-divergent ones. Due to all
these, I first made this change to create a new commit instead of amending one.

But, after few days, there was flakiness observed in the tests and turned out
that we need to do some dirstate dance as repo.dirstate.setparents() does not
always fix the dirstate. That flakiness was a blocker for progress at that time
and we decided to switch to amend back so that we can have things working with
some hacks and we can later fix the implementation part.

Now, yesterday while tackling resolving content-divergence of a stack which is
as follows:

C1 C2
 | |
B1 B2
 | |
A1 A2
 \/
base

where, A1-A2, B1-B2, C1-C2 are content-divergent with each other. Now we can
resolve A1-A2 very well because they have the same parent and let's say that
resolution leads to A3.
Now, we want to resolve B1-B2 and make the new resolution commit on top of A3 so
that we can end up something like:

C3
 |
B3
 |
A3
 |
base

however, amending one of the divergent changesets, it's not possible to create a
commit on a different parent like A3 here without some relocation. We should
prevent relocation as that may leads to some conflicts and should change the
parent before committing.

So, looking ahead, we can't move with using amend as still using that we will
need some relocation hacks making code ugly and prone to bad behaviors, bugs.
Let's change back to creating a new commit so that we can move forward in a good
way.

About repo.dirstate.setparents() not setting the dirstate, I have researched
yesterday night about how we can do that and found out that we can use
cmdrewrite._uncommitdirstate() here. Expect upcoming patches to improve the
documentation of that function.

There are lot of test changes because of change in hash but there is no behavior
change. The only behavior change is in test-evolve-abort-contentdiv.t which is
nice because creating a new commit helps us in stripping that while aborting.
We have a lot of testing of content-divergence and no behavior change gives
enough confidence for making this change.

I reviewed the patch carefully to make sure there is no behavior change and I
suggest reviewer to do the same.

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

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

testing hg push --publish flag
==============================

  $ hg init bare-branch-server
  $ cd bare-branch-server
  $ cat <<EOF >> .hg/hgrc
  > [phases]
  > publish = no
  > EOF
  $ mkcommit ROOT
  $ mkcommit c_dA0
  $ hg phase --public -r 'all()'
  $ cd ..

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

Pushing a 1 new changeset
-------------------------

  $ mkcommit c_dB0
  $ hg push --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Pushing a 2 new changeset (same branch)
---------------------------------------

  $ mkcommit c_dC0
  $ mkcommit c_dD0
  $ hg push --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Pushing a 2 new changeset two head
----------------------------------

  $ mkcommit c_dE0
  $ hg update 'desc("c_dD0")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch other
  marked working directory as branch other
  (branches are permanent and global, did you want a bookmark?)
  $ mkcommit c_oF0
  $ hg push -f --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files (+1 heads)
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  6:45b23c834b6a c_oF0 public other
  |
  | o  5:5576ae39eaee c_dE0 public default
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Publishing 1 common changeset
-----------------------------
  $ mkcommit c_oG0
  $ hg push
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  7:d293f74a1233 c_oG0 draft other
  |
  o  6:45b23c834b6a c_oF0 public other
  |
  | o  5:5576ae39eaee c_dE0 public default
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  
  $ hg push --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  no changes found
  [1]
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  7:d293f74a1233 c_oG0 public other
  |
  o  6:45b23c834b6a c_oF0 public other
  |
  | o  5:5576ae39eaee c_dE0 public default
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Selectively publishing 1 changeset
----------------------------------

  $ mkcommit c_oH0
  $ hg update default
  1 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ mkcommit c_dI0
  $ hg push -r default --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Selectively publishing 1 common changeset
-----------------------------------------

  $ mkcommit c_dJ0
  $ hg push
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  10:ac4cf59f2aac c_dJ0 draft default
  |
  o  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  
  $ hg push --rev default --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  no changes found
  [1]
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  10:ac4cf59f2aac c_dJ0 public default
  |
  o  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Selectively publishing no changeset
-----------------------------------

  $ hg push --rev default --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  no changes found
  [1]
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  10:ac4cf59f2aac c_dJ0 public default
  |
  o  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

Testing --publish interaction with multiple head detection
============================================================

pushing a topic changeset, publishing it
----------------------------------------

  $ hg topic topic_A
  marked working directory as topic: topic_A
  $ mkcommit c_dK0
  active topic 'topic_A' grew its first changeset
  (see 'hg help topics' for more information)
  $ hg push -r 'desc("c_dK0")' --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  active topic 'topic_A' is now empty
  (use 'hg topic --clear' to clear it if needed)
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  11:d06fc4f891e8 c_dK0 public default
  |
  o  10:ac4cf59f2aac c_dJ0 public default
  |
  o  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

pushing a new branch, alongside an existing topic
-------------------------------------------------

  $ hg topic topic_A
  $ mkcommit c_dL0
  active topic 'topic_A' grew its first changeset
  (see 'hg help topics' for more information)
  $ hg push -r 'desc("c_dL0")'
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  $ hg update 'desc("c_dK")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit c_dM0
  $ hg push -r 'desc("c_dM0")' --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  13:0d144c8b6c8f c_dM0 public default
  |
  | o  12:3c73f6cabf07 c_dL0 draft default topic_A
  |/
  o  11:d06fc4f891e8 c_dK0 public default
  |
  o  10:ac4cf59f2aac c_dJ0 public default
  |
  o  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default
  

pushing a topic (publishing) alongside and existing branch head
---------------------------------------------------------------

  $ hg update 'desc("c_dK")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg topic topic_B
  marked working directory as topic: topic_B
  $ mkcommit c_dN0
  active topic 'topic_B' grew its first changeset
  (see 'hg help topics' for more information)
  $ hg push -r 'desc("c_dN0")' --publish
  pushing to $TESTTMP/bare-branch-server
  searching for changes
  abort: push creates new remote head 4dcd0be9db96!
  (merge or see 'hg help push' for details about pushing new heads)
  [255]
  $ hg log --rev 'sort(all(), "topo")' -GT '{rev}:{node|short} {desc} {phase} {branch} {topics}'
  @  14:4dcd0be9db96 c_dN0 draft default topic_B
  |
  | o  13:0d144c8b6c8f c_dM0 public default
  |/
  | o  12:3c73f6cabf07 c_dL0 draft default topic_A
  |/
  o  11:d06fc4f891e8 c_dK0 public default
  |
  o  10:ac4cf59f2aac c_dJ0 public default
  |
  o  9:fbf2be276221 c_dI0 public default
  |
  o  5:5576ae39eaee c_dE0 public default
  |
  | o  8:8e85646c135f c_oH0 draft other
  | |
  | o  7:d293f74a1233 c_oG0 public other
  | |
  | o  6:45b23c834b6a c_oF0 public other
  |/
  o  4:c63e7dd93a91 c_dD0 public default
  |
  o  3:7d56a56d2547 c_dC0 public default
  |
  o  2:286d02a6e2a2 c_dB0 public default
  |
  o  1:134bc3852ad2 c_dA0 public default
  |
  o  0:ea207398892e ROOT public default