view tests/test-rebase-emptycommit.t @ 45167:796b63b0f0dd

merge: refactor code to advise fsmonitor in separate function

merge.update() is quite hard to understand, found this an easy win.

The end goal is to have better organized merge and mergestate handling and then
fix some related bugs.

Differential Revision: https://phab.mercurial-scm.org/D8740

  $ cat >> $HGRCPATH<<EOF
  > [extensions]
  > rebase=
  > drawdag=$TESTDIR/drawdag.py
  > EOF

  $ hg init non-merge
  $ cd non-merge
  $ hg debugdrawdag<<'EOS'
  >   F
  >   |
  >   E
  >   |
  >   D
  >   |
  > B C
  > |/
  > A
  > EOS

  $ for i in C D E F; do
  >   hg bookmark -r $i -i BOOK-$i
  > done

  $ hg debugdrawdag<<'EOS'
  > E
  > |
  > D
  > |
  > B
  > EOS

  $ hg log -G -T '{rev} {desc} {bookmarks}'
  o  7 E
  |
  o  6 D
  |
  | o  5 F BOOK-F
  | |
  | o  4 E BOOK-E
  | |
  | o  3 D BOOK-D
  | |
  | o  2 C BOOK-C
  | |
  o |  1 B
  |/
  o  0 A
  
With --keep, bookmark should move

  $ hg rebase -r 3+4 -d E --keep
  rebasing 3:e7b3f00ed42e "D" (BOOK-D)
  note: not rebasing 3:e7b3f00ed42e "D" (BOOK-D), its destination already has all its changes
  rebasing 4:69a34c08022a "E" (BOOK-E)
  note: not rebasing 4:69a34c08022a "E" (BOOK-E), its destination already has all its changes
  $ hg log -G -T '{rev} {desc} {bookmarks}'
  o  7 E BOOK-D BOOK-E
  |
  o  6 D
  |
  | o  5 F BOOK-F
  | |
  | o  4 E
  | |
  | o  3 D
  | |
  | o  2 C BOOK-C
  | |
  o |  1 B
  |/
  o  0 A
  
Move D and E back for the next test

  $ hg bookmark BOOK-D -fqir 3
  $ hg bookmark BOOK-E -fqir 4

Bookmark is usually an indication of a head. For changes that are introduced by
an ancestor of bookmark B, after moving B to B-NEW, the changes are ideally
still introduced by an ancestor of changeset on B-NEW. In the below case,
"BOOK-D", and "BOOK-E" include changes introduced by "C".

  $ hg rebase -s 2 -d E
  rebasing 2:dc0947a82db8 "C" (BOOK-C C)
  rebasing 3:e7b3f00ed42e "D" (BOOK-D)
  note: not rebasing 3:e7b3f00ed42e "D" (BOOK-D), its destination already has all its changes
  rebasing 4:69a34c08022a "E" (BOOK-E)
  note: not rebasing 4:69a34c08022a "E" (BOOK-E), its destination already has all its changes
  rebasing 5:6b2aeab91270 "F" (BOOK-F F)
  saved backup bundle to $TESTTMP/non-merge/.hg/strip-backup/dc0947a82db8-52bb4973-rebase.hg
  $ hg log -G -T '{rev} {desc} {bookmarks}'
  o  5 F BOOK-F
  |
  o  4 C BOOK-C BOOK-D BOOK-E
  |
  o  3 E
  |
  o  2 D
  |
  o  1 B
  |
  o  0 A
  
Merge and its ancestors all become empty

  $ hg init $TESTTMP/merge1
  $ cd $TESTTMP/merge1

  $ hg debugdrawdag<<'EOS'
  >     E
  >    /|
  > B C D
  >  \|/
  >   A
  > EOS

  $ for i in C D E; do
  >   hg bookmark -r $i -i BOOK-$i
  > done

  $ hg debugdrawdag<<'EOS'
  > H
  > |
  > D
  > |
  > C
  > |
  > B
  > EOS

Previously, there was a bug where the empty commit check compared the parent
branch name with the wdir branch name instead of the actual branch name (which
should stay unchanged if --keepbranches is passed), and erroneously assumed
that an otherwise empty changeset should be created because of the incorrectly
assumed branch name change.

  $ hg update H -q
  $ hg branch foo -q

  $ hg rebase -r '(A::)-(B::)-A' -d H --keepbranches
  rebasing 2:dc0947a82db8 "C" (BOOK-C)
  note: not rebasing 2:dc0947a82db8 "C" (BOOK-C), its destination already has all its changes
  rebasing 3:b18e25de2cf5 "D" (BOOK-D)
  note: not rebasing 3:b18e25de2cf5 "D" (BOOK-D), its destination already has all its changes
  rebasing 4:86a1f6686812 "E" (BOOK-E E)
  note: not rebasing 4:86a1f6686812 "E" (BOOK-E E), its destination already has all its changes
  saved backup bundle to $TESTTMP/merge1/.hg/strip-backup/b18e25de2cf5-1fd0a4ba-rebase.hg
  $ hg update null -q

  $ hg log -G -T '{rev} {desc} {bookmarks}'
  o  4 H BOOK-C BOOK-D BOOK-E
  |
  o  3 D
  |
  o  2 C
  |
  o  1 B
  |
  o  0 A
  
Part of ancestors of a merge become empty

  $ hg init $TESTTMP/merge2
  $ cd $TESTTMP/merge2

  $ hg debugdrawdag<<'EOS'
  >     G
  >    /|
  >   E F
  >   | |
  > B C D
  >  \|/
  >   A
  > EOS

  $ for i in C D E F G; do
  >   hg bookmark -r $i -i BOOK-$i
  > done

  $ hg debugdrawdag<<'EOS'
  > H
  > |
  > F
  > |
  > C
  > |
  > B
  > EOS

  $ hg rebase -r '(A::)-(B::)-A' -d H
  rebasing 2:dc0947a82db8 "C" (BOOK-C)
  note: not rebasing 2:dc0947a82db8 "C" (BOOK-C), its destination already has all its changes
  rebasing 3:b18e25de2cf5 "D" (BOOK-D D)
  rebasing 4:03ca77807e91 "E" (BOOK-E E)
  rebasing 5:ad6717a6a58e "F" (BOOK-F)
  note: not rebasing 5:ad6717a6a58e "F" (BOOK-F), its destination already has all its changes
  rebasing 6:c58e8bdac1f4 "G" (BOOK-G G)
  saved backup bundle to $TESTTMP/merge2/.hg/strip-backup/b18e25de2cf5-2d487005-rebase.hg

  $ hg log -G -T '{rev} {desc} {bookmarks}'
  o    7 G BOOK-G
  |\
  | o  6 E BOOK-E
  | |
  o |  5 D BOOK-D BOOK-F
  |/
  o  4 H BOOK-C
  |
  o  3 F
  |
  o  2 C
  |
  o  1 B
  |
  o  0 A