view tests/test-evolve-topic.t @ 5777:c5dfbbe4363d

evolve: when relocating, optionally first try to do it using in-memory merge

This patch adds a config option to let run evolve's relocation step
using in-memory merge. It is disabled by default. When the option is
on, the relocation is first attempted in memory. If that fails because
of merge conflicts, it retries that commit in the working copy.

There are a few reasons that I made it configurable. The most
important one is that the precommit hook won't trigger when using
in-memory merge. Another reason is that it lets us roll out the
feature slowly to our users at Google.

For now, we also update the working copy after creating the commit (in the
successful case, when there are no merge conflicts). The next patch will make it
so we don't do that update.

Because of the unnecessary working-copy update, this patch doesn't
provide any benefit on its own. Evolving 29 commits that each change
one line in the hg slows down from ~4.5s to ~4.8s when the config
option is on.

I've added `#testcases inmemory ondisk` to select `.t` files. Almost
all differences are because of the new "hit merge conflicts" message
and retrying the merge. There's also one difference in
`test-stabilize-order.t` caused by the different order of working copy
updates (we now update the working copy at the end).

Check we can find the topic extensions

  $ cat >> $HGRCPATH <<EOF
  > [defaults]
  > amend=-d "0 0"
  > fold=-d "0 0"
  > [phases]
  > publish = False
  > [ui]
  > logtemplate = {rev} - \{{get(namespaces, "topics")}} {node|short} {desc} ({phase})\n
  > [diff]
  > git = 1
  > unified = 0
  > [extensions]
  > rebase = 
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
  $ echo "topic=$(echo $(dirname $TESTDIR))/hgext3rd/topic/" >> $HGRCPATH

  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    hg ci -m "add $1"
  > }

Create a simple setup

  $ hg init repoa
  $ cd repoa
  $ mkcommit aaa
  $ mkcommit bbb
  $ hg topic foo
  marked working directory as topic: foo
  $ mkcommit ccc
  active topic 'foo' grew its first changeset
  (see 'hg help topics' for more information)
  $ mkcommit ddd
  $ mkcommit eee
  $ mkcommit fff
  $ hg topic bar
  $ mkcommit ggg
  active topic 'bar' grew its first changeset
  (see 'hg help topics' for more information)
  $ mkcommit hhh
  $ mkcommit iii
  $ mkcommit jjj

  $ hg log -G
  @  9 - {bar} 1d964213b023 add jjj (draft)
  |
  o  8 - {bar} fcab990f3261 add iii (draft)
  |
  o  7 - {bar} b0c2554835ac add hhh (draft)
  |
  o  6 - {bar} c748293f1c1a add ggg (draft)
  |
  o  5 - {foo} 6a6b7365c751 add fff (draft)
  |
  o  4 - {foo} 3969ab847d9c add eee (draft)
  |
  o  3 - {foo} 4e3a154f38c7 add ddd (draft)
  |
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  

Test that evolve --all evolve the current topic
-----------------------------------------------

make a mess

  $ hg up foo
  switching to topic foo
  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ hg topic -l 
  ### topic: foo (?)
  ### branch: default (?)
  ### target: default (branch)
  s4@ add fff (current)
  s3: add eee
  s2: add ddd
  s1: add ccc
  s0^ add bbb (base)
  $ hg up 'desc(ddd)'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo ddd >> ddd
  $ hg amend
  6 new orphan changesets
  $ hg up 'desc(fff)'
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo fff >> fff
  $ hg amend

  $ hg log -G
  @  11 - {foo} e104f49bab28 add fff (draft)
  |
  | o  10 - {foo} d9cacd156ffc add ddd (draft)
  | |
  | | *  9 - {bar} 1d964213b023 add jjj (draft)
  | | |
  | | *  8 - {bar} fcab990f3261 add iii (draft)
  | | |
  | | *  7 - {bar} b0c2554835ac add hhh (draft)
  | | |
  | | *  6 - {bar} c748293f1c1a add ggg (draft)
  | | |
  +---x  5 - {foo} 6a6b7365c751 add fff (draft)
  | |
  * |  4 - {foo} 3969ab847d9c add eee (draft)
  | |
  x |  3 - {foo} 4e3a154f38c7 add ddd (draft)
  |/
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  

Run evolve --all

  $ hg stack
  ### topic: foo
  ### target: default (branch)
  s4@ add fff (current orphan)
  s3$ add eee (orphan)
  s2: add ddd
  s1: add ccc
  s0^ add bbb (base)

  $ hg evolve --all --update
  move:[s3] add eee
  atop:[s2] add ddd
  move:[s4] add fff
  working directory is now at 070c5573d8f9
  $ hg log -G
  @  13 - {foo} 070c5573d8f9 add fff (draft)
  |
  o  12 - {foo} 42b49017ff90 add eee (draft)
  |
  o  10 - {foo} d9cacd156ffc add ddd (draft)
  |
  | *  9 - {bar} 1d964213b023 add jjj (draft)
  | |
  | *  8 - {bar} fcab990f3261 add iii (draft)
  | |
  | *  7 - {bar} b0c2554835ac add hhh (draft)
  | |
  | *  6 - {bar} c748293f1c1a add ggg (draft)
  | |
  | x  5 - {foo} 6a6b7365c751 add fff (draft)
  | |
  | x  4 - {foo} 3969ab847d9c add eee (draft)
  | |
  | x  3 - {foo} 4e3a154f38c7 add ddd (draft)
  |/
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  

Test that evolve does not loose topic information
-------------------------------------------------

  $ hg evolve --rev 'topic(bar)' --update
  move:[6] add ggg
  atop:[13] add fff
  move:[7] add hhh
  move:[8] add iii
  move:[9] add jjj
  working directory is now at 9bf430c106b7
  $ hg log -G
  @  17 - {bar} 9bf430c106b7 add jjj (draft)
  |
  o  16 - {bar} d2dc89c57700 add iii (draft)
  |
  o  15 - {bar} 20bc4d02aa62 add hhh (draft)
  |
  o  14 - {bar} 16d6f664b17c add ggg (draft)
  |
  o  13 - {foo} 070c5573d8f9 add fff (draft)
  |
  o  12 - {foo} 42b49017ff90 add eee (draft)
  |
  o  10 - {foo} d9cacd156ffc add ddd (draft)
  |
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  

Tests next and prev behavior
============================

Basic move are restricted to the current topic

  $ hg up foo
  switching to topic foo
  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [s3] add eee
  $ hg next
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  [s4] add fff
  $ hg next
  no children on topic "foo"
  do you want --no-topic
  [1]
  $ hg next --no-topic
  switching to topic bar
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  [14] add ggg
  $ hg prev
  preserving the current topic 'bar'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [s4] add fff
  $ hg prev
  no parent in topic "bar"
  (do you want --no-topic)
  [1]
  $ hg prev --no-topic
  switching to topic foo
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [12] add eee

Testing when instability is involved

  $ hg log -G
  o  17 - {bar} 9bf430c106b7 add jjj (draft)
  |
  o  16 - {bar} d2dc89c57700 add iii (draft)
  |
  o  15 - {bar} 20bc4d02aa62 add hhh (draft)
  |
  o  14 - {bar} 16d6f664b17c add ggg (draft)
  |
  o  13 - {foo} 070c5573d8f9 add fff (draft)
  |
  @  12 - {foo} 42b49017ff90 add eee (draft)
  |
  o  10 - {foo} d9cacd156ffc add ddd (draft)
  |
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  
  $ hg topic -r 070c5573d8f9 bar
  4 new orphan changesets
  changed topic on 1 changesets to "bar"
  $ hg up 16d6f664b17c
  switching to topic bar
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg stack
  ### topic: bar
  ### target: default (branch)
  s5$ add jjj (orphan)
  s4$ add iii (orphan)
  s3$ add hhh (orphan)
  s2@ add ggg (current orphan)
  s1: add fff
  s0^ add eee (base)

  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [s1] add fff

Testing issue 5708 when we are on obsolete changeset and there is active topic
------------------------------------------------------------------------------

  $ hg log --graph
  @  18 - {bar} 793eb6370b2d add fff (draft)
  |
  | *  17 - {bar} 9bf430c106b7 add jjj (draft)
  | |
  | *  16 - {bar} d2dc89c57700 add iii (draft)
  | |
  | *  15 - {bar} 20bc4d02aa62 add hhh (draft)
  | |
  | *  14 - {bar} 16d6f664b17c add ggg (draft)
  | |
  | x  13 - {foo} 070c5573d8f9 add fff (draft)
  |/
  o  12 - {foo} 42b49017ff90 add eee (draft)
  |
  o  10 - {foo} d9cacd156ffc add ddd (draft)
  |
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  

  $ hg topic
   * bar (5 changesets, 4 unstable)
     foo (3 changesets)

When the current topic, obsoleted changesets topic and successor topic are same

  $ hg up 20bc4d02aa62
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo foobar >> hhh
  $ hg amend
  $ hg up 20bc4d02aa62
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory parent is obsolete! (20bc4d02aa62)
  (use 'hg evolve' to update to its successor: d834582d9ee3)
  $ hg log -Gr 14::
  *  19 - {bar} d834582d9ee3 add hhh (draft)
  |
  | *  17 - {bar} 9bf430c106b7 add jjj (draft)
  | |
  | *  16 - {bar} d2dc89c57700 add iii (draft)
  | |
  | @  15 - {bar} 20bc4d02aa62 add hhh (draft)
  |/
  *  14 - {bar} 16d6f664b17c add ggg (draft)
  |
  ~

  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [s2] add ggg

When the current topic and successors topic are same, but obsolete cset has
different topic

  $ hg rebase -s d2dc89c57700 -d d834582d9ee3 --config extensions.rebase=
  rebasing 16:d2dc89c57700 bar "add iii"
  1 new orphan changesets
  rebasing 17:9bf430c106b7 bar "add jjj"
  1 new orphan changesets
  $ hg log -Gr 42b49017ff90::
  *  21 - {bar} 7542e76aba2c add jjj (draft)
  |
  *  20 - {bar} 7858bd7e9906 add iii (draft)
  |
  *  19 - {bar} d834582d9ee3 add hhh (draft)
  |
  | o  18 - {bar} 793eb6370b2d add fff (draft)
  | |
  @ |  14 - {bar} 16d6f664b17c add ggg (draft)
  | |
  x |  13 - {foo} 070c5573d8f9 add fff (draft)
  |/
  o  12 - {foo} 42b49017ff90 add eee (draft)
  |
  ~

  $ hg up 070c5573d8f9
  switching to topic foo
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  working directory parent is obsolete! (070c5573d8f9)
  (use 'hg evolve' to update to its successor: 793eb6370b2d)

  $ hg topic bar

  $ hg prev
  no parent in topic "bar"
  (do you want --no-topic)
  [1]

When current topic and obsolete cset topic are same but successor has different
one

  $ hg up 070c5573d8f9
  switching to topic foo
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [s3] add eee

Check stackaliases(s#) works with  --continue case also, while evolving:
------------------------------------------------------------------------
  $ hg up 18
  switching to topic bar
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg evolve --all
  move:[s2] add ggg
  atop:[s1] add fff
  move:[s3] add hhh
  move:[s4] add iii
  move:[s5] add jjj
  $ echo "changes in hhh" > hhh
  $ hg add hhh
  $ hg ci --amend
  4 new orphan changesets
  $ hg log -G
  @  26 - {bar} 2c295936ac04 add fff (draft)
  |
  | *  25 - {bar} 38a82cbb794a add jjj (draft)
  | |
  | *  24 - {bar} 4a44eba0fdb3 add iii (draft)
  | |
  | *  23 - {bar} 7acd9ea5d677 add hhh (draft)
  | |
  | *  22 - {bar} 735c7bd8f133 add ggg (draft)
  | |
  | x  18 - {bar} 793eb6370b2d add fff (draft)
  |/
  o  12 - {foo} 42b49017ff90 add eee (draft)
  |
  o  10 - {foo} d9cacd156ffc add ddd (draft)
  |
  o  2 - {foo} cced9bac76e3 add ccc (draft)
  |
  o  1 - {} a4dbed0837ea add bbb (draft)
  |
  o  0 - {} 199cc73e9a0b add aaa (draft)
  
  $ hg evolve --all
  move:[s2] add ggg
  atop:[s1] add fff
  move:[s3] add hhh
  merging hhh
  warning: conflicts while merging hhh! (edit, then use 'hg resolve --mark')
  unresolved merge conflicts
  (see 'hg help evolve.interrupted')
  [240]
  $ echo "resolved hhh" > hhh
  $ hg resolve --mark hhh
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  evolving 23:7acd9ea5d677 "add hhh"
  move:[s4] add iii
  atop:[s3] add hhh
  move:[s5] add jjj

Test to make sure that evolve don't crash with FilteredRepoLookupError when obsolete revs are in play:
------------------------------------------------------------------------------------------------------

update to obsolete revision
  $ hg up -r 'min(desc("add fff"))' --hidden
  switching to topic foo
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to hidden changeset 6a6b7365c751
  (hidden revision '6a6b7365c751' was rewritten as: 2c295936ac04)
  working directory parent is obsolete! (6a6b7365c751)
  (use 'hg evolve' to update to its successor: 2c295936ac04)

Evolve:
  $ hg evolve
  update:[26] add fff
  switching to topic bar
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at 2c295936ac04