view tests/test-rebase-partial.t @ 44185:a19331456d48

rust-nodemap: mutable NodeTree data structure

Thanks to the previously indexing abstraction,
the only difference in the lookup algorithm is that we
don't need the special case for an empty NodeTree any more.

We've considered making the mutable root an `Option<Block>`,
but that leads to unpleasant checks and `unwrap()` unless we
abstract it as typestate patterns (`NodeTree<Immutable>` and
`NodeTree<Mutated>`) which seem exaggerated in that
case.

The initial copy of the root block is a very minor
performance penalty, given that it typically occurs just once
per transaction.

Differential Revision: https://phab.mercurial-scm.org/D7793

Tests rebasing with part of the rebase set already in the
destination (issue5422)

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > rebase=
  > drawdag=$TESTDIR/drawdag.py
  > 
  > [experimental]
  > evolution.createmarkers=True
  > evolution.allowunstable=True
  > 
  > [alias]
  > tglog = log -G --template "{rev}: {node|short} {desc}"
  > EOF

  $ rebasewithdag() {
  >   N=`"$PYTHON" -c "print($N+1)"`
  >   hg init repo$N && cd repo$N
  >   hg debugdrawdag
  >   hg rebase "$@" > _rebasetmp
  >   r=$?
  >   grep -v 'saved backup bundle' _rebasetmp
  >   [ $r -eq 0 ] && hg tglog
  >   cd ..
  >   return $r
  > }

Rebase two commits, of which one is already in the right place

  $ rebasewithdag -r C+D -d B <<EOF
  > C
  > |
  > B D
  > |/
  > A
  > EOF
  rebasing 2:b18e25de2cf5 "D" (D)
  already rebased 3:26805aba1e60 "C" (C tip)
  o  4: fe3b4c6498fa D
  |
  | o  3: 26805aba1e60 C
  |/
  | x  2: b18e25de2cf5 D
  | |
  o |  1: 112478962961 B
  |/
  o  0: 426bada5c675 A
  
Can collapse commits even if one is already in the right place

  $ rebasewithdag --collapse -r C+D -d B <<EOF
  > C
  > |
  > B D
  > |/
  > A
  > EOF
  rebasing 2:b18e25de2cf5 "D" (D)
  rebasing 3:26805aba1e60 "C" (C tip)
  o  4: a2493f4ace65 Collapsed revision
  |  * D
  |  * C
  | x  3: 26805aba1e60 C
  |/
  | x  2: b18e25de2cf5 D
  | |
  o |  1: 112478962961 B
  |/
  o  0: 426bada5c675 A
  
Abort doesn't lose the commits that were already in the right place

  $ hg init abort
  $ cd abort
  $ hg debugdrawdag <<EOF
  > C
  > |
  > B D  # B/file = B
  > |/   # D/file = D
  > A
  > EOF
  $ hg rebase -r C+D -d B
  rebasing 2:ef8c0fe0897b "D" (D)
  merging file
  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see hg resolve, then hg rebase --continue)
  [1]
  $ hg rebase --abort
  rebase aborted
  $ hg tglog
  o  3: 79f6d6ab7b14 C
  |
  | o  2: ef8c0fe0897b D
  | |
  o |  1: 594087dbaf71 B
  |/
  o  0: 426bada5c675 A
  
  $ cd ..

Rebase with "holes". The commits after the hole should end up on the parent of
the hole (B below), not on top of the destination (A).

  $ rebasewithdag -r B+D -d A <<EOF
  > D
  > |
  > C
  > |
  > B
  > |
  > A
  > EOF
  already rebased 1:112478962961 "B" (B)
  rebasing 3:f585351a92f8 "D" (D tip)
  o  4: 1e6da8103bc7 D
  |
  | x  3: f585351a92f8 D
  | |
  | o  2: 26805aba1e60 C
  |/
  o  1: 112478962961 B
  |
  o  0: 426bada5c675 A