$ cat >> $HGRCPATH <<EOF

  > [extensions]

  > graphlog=

  > rebase=

  > 

  > [alias]

  > tglog = log -G --template "{rev}: '{desc}' {branches}\n"

  > EOF

  $ hg init a

  $ cd a

  $ hg unbundle $TESTDIR/bundles/rebase.hg

  adding changesets

  adding manifests

  adding file changes

  added 8 changesets with 7 changes to 7 files (+2 heads)

  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ hg up tip

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

  $ cd ..

Rebasing

D onto H - simple rebase:

  $ hg clone -q -u . a a1

  $ cd a1

  $ hg tglog

  @  7: 'H'

  |

  | o  6: 'G'

  |/|

  o |  5: 'F'

  | |

  | o  4: 'E'

  |/

  | o  3: 'D'

  | |

  | o  2: 'C'

  | |

  | o  1: 'B'

  |/

  o  0: 'A'

  $ hg rebase -s 3 -d 7

  saved backup bundle to $TESTTMP/a1/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog

  @    7: 'D'

  |\

  | o  6: 'H'

  | |

  | | o  5: 'G'

  | |/|

  | o |  4: 'F'

  | | |

  | | o  3: 'E'

  | |/

  o |  2: 'C'

  | |

  o |  1: 'B'

  |/

  o  0: 'A'

  $ cd ..

D onto F - intermediate point:

  $ hg clone -q -u . a a2

  $ cd a2

  $ hg rebase -s 3 -d 5

  saved backup bundle to $TESTTMP/a2/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog

  @    7: 'D'

  |\

  | | o  6: 'H'

  | |/

  | | o  5: 'G'

  | |/|

  | o |  4: 'F'

  | | |

  | | o  3: 'E'

  | |/

  o |  2: 'C'

  | |

  o |  1: 'B'

  |/

  o  0: 'A'

  $ cd ..

E onto H - skip of G:

  $ hg clone -q -u . a a3

  $ cd a3

  $ hg rebase -s 4 -d 7

  saved backup bundle to $TESTTMP/a3/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog

  @  6: 'E'

  |

  o  5: 'H'

  |

  o  4: 'F'

  |

  | o  3: 'D'

  | |

  | o  2: 'C'

  | |

  | o  1: 'B'

  |/

  o  0: 'A'

  $ cd ..

F onto E - rebase of a branching point (skip G):

  $ hg clone -q -u . a a4

  $ cd a4

  $ hg rebase -s 5 -d 4

  saved backup bundle to $TESTTMP/a4/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog

  @  6: 'H'

  |

  o  5: 'F'

  |

  o  4: 'E'

  |

  | o  3: 'D'

  | |

  | o  2: 'C'

  | |

  | o  1: 'B'

  |/

  o  0: 'A'

  $ cd ..

G onto H - merged revision having a parent in ancestors of target:

  $ hg clone -q -u . a a5

  $ cd a5

  $ hg rebase -s 6 -d 7

  saved backup bundle to $TESTTMP/a5/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog

  @    7: 'G'

  |\

  | o  6: 'H'

  | |

  | o  5: 'F'

  | |

  o |  4: 'E'

  |/

  | o  3: 'D'

  | |

  | o  2: 'C'

  | |

  | o  1: 'B'

  |/

  o  0: 'A'

  $ cd ..

F onto B - G maintains E as parent:

  $ hg clone -q -u . a a6

  $ cd a6

  $ hg rebase -s 5 -d 1

  saved backup bundle to $TESTTMP/a6/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog

  @  7: 'H'

  |

  | o  6: 'G'

  |/|

  o |  5: 'F'

  | |

  | o  4: 'E'

  | |

  | | o  3: 'D'

  | | |

  +---o  2: 'C'

  | |

  o |  1: 'B'

  |/

  o  0: 'A'

  $ cd ..

These will fail (using --source):

G onto F - rebase onto an ancestor:

  $ hg clone -q -u . a a7

  $ cd a7

  $ hg rebase -s 6 -d 5

  nothing to rebase

  [1]

F onto G - rebase onto a descendant:

  $ hg rebase -s 5 -d 6

  abort: source is ancestor of destination

  [255]

G onto B - merge revision with both parents not in ancestors of target:

  $ hg rebase -s 6 -d 1

  abort: cannot use revision 6 as base, result would have 3 parents

  [255]

These will abort gracefully (using --base):

G onto G - rebase onto same changeset:

  $ hg rebase -b 6 -d 6

  nothing to rebase

  [1]

G onto F - rebase onto an ancestor:

  $ hg rebase -b 6 -d 5

  nothing to rebase

  [1]

F onto G - rebase onto a descendant:

  $ hg rebase -b 5 -d 6

  nothing to rebase

  [1]

C onto A - rebase onto an ancestor:

  $ hg rebase -d 0 -s 2

  saved backup bundle to $TESTTMP/a7/.hg/strip-backup/5fddd98957c8-backup.hg

  $ hg tglog

  @  7: 'D'

  |

  o  6: 'C'

  |

  | o  5: 'H'

  | |

  | | o  4: 'G'

  | |/|

  | o |  3: 'F'

  |/ /

  | o  2: 'E'

  |/

  | o  1: 'B'

  |/

  o  0: 'A'