Require a destination

  $ cat >> $HGRCPATH <<EOF

  > [extensions]

  > rebase =

  > [commands]

  > rebase.requiredest = True

  > EOF

  $ hg init repo

  $ cd repo

  $ echo a >> a

  $ hg commit -qAm aa

  $ echo b >> b

  $ hg commit -qAm bb

  $ hg up ".^"

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo c >> c

  $ hg commit -qAm cc

  $ hg rebase

  abort: you must specify a destination

  (use: hg rebase -d REV)

  [10]

  $ hg rebase -d 1

  rebasing 2:5db65b93a12b tip "cc"

  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/5db65b93a12b-4fb789ec-rebase.hg

  $ hg rebase -d 0 -r . -q

  $ HGPLAIN=1 hg rebase

  rebasing 2:889b0bc6a730 tip "cc"

  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/889b0bc6a730-41ec4f81-rebase.hg

  $ hg rebase -d 0 -r . -q

  $ hg --config commands.rebase.requiredest=False rebase

  rebasing 2:279de9495438 tip "cc"

  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/279de9495438-ab0a5128-rebase.hg

Requiring dest should not break continue or other rebase options

  $ hg up 1 -q

  $ echo d >> c

  $ hg commit -qAm dc

  $ hg log -G -T '{rev} {desc}'

  @  3 dc

  |

  | o  2 cc

  |/

  o  1 bb

  |

  o  0 aa

  $ hg rebase -d 2

  rebasing 3:0537f6b50def tip "dc"

  merging c

  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')

  unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')

  [240]

  $ echo d > c

  $ hg resolve --mark --all

  (no more unresolved files)

  continue: hg rebase --continue

  $ hg rebase --continue

  rebasing 3:0537f6b50def tip "dc"

  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/0537f6b50def-be4c7386-rebase.hg

  $ cd ..

Check rebase.requiredest interaction with pull --rebase

  $ hg clone repo clone

  updating to branch default

  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd repo

  $ echo e > e

  $ hg commit -qAm ee

  $ cd ..

  $ cd clone

  $ echo f > f

  $ hg commit -qAm ff

  $ hg pull --rebase

  abort: rebase destination required by configuration

  (use hg pull followed by hg rebase -d DEST)

  [10]

Setup rebase with multiple destinations

  $ cd $TESTTMP

  $ cat >> $TESTTMP/maprevset.py <<EOF

  > from mercurial import registrar, revset, revsetlang, smartset

  > revsetpredicate = registrar.revsetpredicate()

  > cache = {}

  > @revsetpredicate(b'map')

  > def map(repo, subset, x):

  >     """(set, mapping)"""

  >     setarg, maparg = revsetlang.getargs(x, 2, 2, b'')

  >     rset = revset.getset(repo, smartset.fullreposet(repo), setarg)

  >     mapstr = revsetlang.getstring(maparg, b'')

  >     map = dict(a.split(b':') for a in mapstr.split(b','))

  >     rev = rset.first()

  >     desc = repo[rev].description()

  >     newdesc = map.get(desc)

  >     if newdesc == b'null':

  >         revs = [-1]

  >     else:

  >         query = revsetlang.formatspec(b'desc(%s)', newdesc)

  >         revs = repo.revs(query)

  >     return smartset.baseset(revs)

  > EOF

  $ cat >> $HGRCPATH <<EOF

  > [ui]

  > allowemptycommit=1

  > [extensions]

  > drawdag=$TESTDIR/drawdag.py

  > [phases]

  > publish=False

  > [alias]

  > tglog = log -G --template "{rev}: {node|short} {desc} {instabilities}" -r 'sort(all(), topo)'

  > [extensions]

  > maprevset=$TESTTMP/maprevset.py

  > [experimental]

  > evolution=true

  > 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 ] && rm -f .hg/localtags && hg tglog

  >   cd ..

  >   return $r

  > }

Destination resolves to an empty set:

  $ rebasewithdag -s B -d 'SRC - SRC' <<'EOS'

  > C

  > |

  > B

  > |

  > A

  > EOS

  nothing to rebase - empty destination

  [1]

Multiple destinations and --collapse are not compatible:

  $ rebasewithdag -s C+E -d 'SRC^^' --collapse <<'EOS'

  > C F

  > | |

  > B E

  > | |

  > A D

  > EOS

  abort: --collapse does not work with multiple destinations

  [10]

Multiple destinations cannot be used with --base:

  $ rebasewithdag -b B -b E -d 'SRC^^' --collapse <<'EOS'

  > B E

  > | |

  > A D

  > EOS

  abort: unknown revision 'SRC'

  [10]

Rebase to null should work:

  $ rebasewithdag -r A+C+D -d 'null' <<'EOS'

  > C D

  > | |

  > A B

  > EOS

  already rebased 0:426bada5c675 A "A"

  already rebased 2:dc0947a82db8 C "C"

  rebasing 3:004dc1679908 D tip "D"

  o  4: d8d8601abd5e D

  o  2: dc0947a82db8 C

  |

  | o  1: fc2b737bb2e5 B

  |

  o  0: 426bada5c675 A

Destination resolves to multiple changesets:

  $ rebasewithdag -s B -d 'ALLSRC+SRC' <<'EOS'

  > C

  > |

  > B

  > |

  > Z

  > EOS

  abort: rebase destination for f0a671a46792 is not unique

  [10]

Destination is an ancestor of source:

  $ rebasewithdag -s B -d 'SRC' <<'EOS'

  > C

  > |

  > B

  > |

  > Z

  > EOS

  abort: source and destination form a cycle

  [10]

BUG: cycles aren't flagged correctly when --dry-run is set:

  $ rebasewithdag -s B -d 'SRC' --dry-run <<'EOS'

  > C

  > |

  > B

  > |

  > Z

  > EOS

  abort: source and destination form a cycle

  starting dry-run rebase; repository will not be changed

  [10]

Switch roots:

  $ rebasewithdag -s 'all() - roots(all())' -d 'roots(all()) - ::SRC' <<'EOS'

  > C  F

  > |  |

  > B  E

  > |  |

  > A  D

  > EOS

  rebasing 2:112478962961 B "B"

  rebasing 4:26805aba1e60 C "C"

  rebasing 3:cd488e83d208 E "E"

  rebasing 5:0069ba24938a F tip "F"

  o  9: d150ff263fc8 F

  |

  o  8: 66f30a1a2eab E

  |

  | o  7: 93db94ffae0e C

  | |

  | o  6: d0071c3b0c88 B

  | |

  | o  1: 058c1e1fb10a D

  |

  o  0: 426bada5c675 A

Different destinations for merge changesets with a same root:

  $ rebasewithdag -s B -d '((parents(SRC)-B-A)::) - (::ALLSRC)' <<'EOS'

  > C G

  > |\|

  > | F

  > |

  > B E

  > |\|

  > A D

  > EOS

  rebasing 3:a4256619d830 B "B"

  rebasing 6:8e139e245220 C tip "C"

  o    8: d7d1169e9b1c C

  |\

  | o    7: 2ed0c8546285 B

  | |\

  o | |  5: 8fdb2c1feb20 G

  | | |

  | | o  4: cd488e83d208 E

  | | |

  o | |  2: a6661b868de9 F

   / /

  | o  1: 058c1e1fb10a D

  |

  o  0: 426bada5c675 A

Move to a previous parent:

  $ rebasewithdag -s E -s F -s G -d 'SRC^^' <<'EOS'

  >     H

  >     |

  >   D G

  >   |/

  >   C F

  >   |/

  >   B E  # E will be ignored, since E^^ is empty

  >   |/

  >   A

  > EOS

  rebasing 4:33441538d4aa F "F"

  rebasing 6:cf43ad9da869 G "G"

  rebasing 7:eef94f3b5f03 H tip "H"

  o  10: b3d84c6666cf H

  |

  | o  5: f585351a92f8 D

  |/

  o  3: 26805aba1e60 C

  |

  | o  9: f7c28a1a15e2 G

  |/

  o  1: 112478962961 B

  |

  | o  8: 02aa697facf7 F

  |/

  | o  2: 7fb047a69f22 E

  |/

  o  0: 426bada5c675 A

Source overlaps with destination:

  $ rebasewithdag -s 'B+C+D' -d 'map(SRC, "B:C,C:D")' <<'EOS'

  > B C D

  >  \|/

  >   A

  > EOS

  rebasing 2:dc0947a82db8 C "C"

  rebasing 1:112478962961 B "B"

  o  5: 5fe9935d5222 B

  |

  o  4: 12d20731b9e0 C

  |

  o  3: b18e25de2cf5 D

  |

  o  0: 426bada5c675 A

Detect cycles early:

  $ rebasewithdag -r 'all()-Z' -d 'map(SRC, "A:B,B:C,C:D,D:B")' <<'EOS'

  > A B C

  >  \|/

  >   | D

  >   |/

  >   Z

  > EOS

  abort: source and destination form a cycle

  [10]

Detect source is ancestor of dest in runtime:

  $ rebasewithdag -r 'C+B' -d 'map(SRC, "C:B,B:D")' -q <<'EOS'

  >   D

  >   |

  > B C

  >  \|

  >   A

  > EOS

  abort: source is ancestor of destination

  [10]

"Already rebased" fast path still works:

  $ rebasewithdag -r 'all()' -d 'SRC^' <<'EOS'

  >   E F

  >  /| |

  > B C D

  >  \|/

  >   A

  > EOS

  already rebased 1:112478962961 B "B"

  already rebased 2:dc0947a82db8 C "C"

  already rebased 3:b18e25de2cf5 D "D"

  already rebased 4:312782b8f06e E "E"

  already rebased 5:ad6717a6a58e F tip "F"

  o  5: ad6717a6a58e F

  |

  o  3: b18e25de2cf5 D

  |

  | o    4: 312782b8f06e E

  | |\

  +---o  2: dc0947a82db8 C

  | |

  | o  1: 112478962961 B

  |/

  o  0: 426bada5c675 A

Massively rewrite the DAG:

  $ rebasewithdag -r 'all()' -d 'map(SRC, "A:I,I:null,H:A,B:J,J:C,C:H,D:E,F:G,G:K,K:D,E:B")' <<'EOS'

  > D G K

  > | | |