$ cat >> $HGRCPATH <<EOF

  > [ui]

  > logtemplate = {rev}:{node|short} {desc}\n

  > [extensions]

  > EOF

  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH

  $ echo "inhibit=$(echo $(dirname $TESTDIR))/hgext/inhibit.py" >> $HGRCPATH

  $ mkcommit() {

  >    echo "$1" > "$1"

  >    hg add "$1"

  >    hg ci -m "add $1"

  > }

  $ hg init inhibit

  $ cd inhibit

  $ mkcommit cA

  $ mkcommit cB

  $ mkcommit cC

  $ mkcommit cD

  $ hg up 'desc(cA)'

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

  $ mkcommit cE

  created new head

  $ mkcommit cG

  $ mkcommit cH

  $ mkcommit cJ

  $ hg log -G 

  @  7:18214586bf78 add cJ

  |

  o  6:cf5c4f4554ce add cH

  |

  o  5:5419eb264a33 add cG

  |

  o  4:98065434e5c6 add cE

  |

  | o  3:2db36d8066ff add cD

  | |

  | o  2:7df62a38b9bf add cC

  | |

  | o  1:02bcbc3f6e56 add cB

  |/

  o  0:54ccbc537fc2 add cA

plain prune

  $ hg prune 1::

  3 changesets pruned

  $ hg log -G

  @  7:18214586bf78 add cJ

  |

  o  6:cf5c4f4554ce add cH

  |

  o  5:5419eb264a33 add cG

  |

  o  4:98065434e5c6 add cE

  |

  o  0:54ccbc537fc2 add cA

  $ hg debugobsinhibit --hidden 1::

  $ hg log -G

  @  7:18214586bf78 add cJ

  |

  o  6:cf5c4f4554ce add cH

  |

  o  5:5419eb264a33 add cG

  |

  o  4:98065434e5c6 add cE

  |

  | o  3:2db36d8066ff add cD

  | |

  | o  2:7df62a38b9bf add cC

  | |

  | o  1:02bcbc3f6e56 add cB

  |/

  o  0:54ccbc537fc2 add cA

  $ hg prune --hidden 1::

  3 changesets pruned

  $ hg log -G

  @  7:18214586bf78 add cJ

  |

  o  6:cf5c4f4554ce add cH

  |

  o  5:5419eb264a33 add cG

  |

  o  4:98065434e5c6 add cE

  |

  o  0:54ccbc537fc2 add cA

after amend

  $ echo babar > cJ

  $ hg amend

  $ hg log -G

  @  9:55c73a90e4b4 add cJ

  |

  o  6:cf5c4f4554ce add cH

  |

  o  5:5419eb264a33 add cG

  |

  o  4:98065434e5c6 add cE

  |

  o  0:54ccbc537fc2 add cA

  $ hg debugobsinhibit --hidden 18214586bf78

  $ hg log -G

  @  9:55c73a90e4b4 add cJ

  |

  | o  7:18214586bf78 add cJ

  |/

  o  6:cf5c4f4554ce add cH

  |

  o  5:5419eb264a33 add cG

  |

  o  4:98065434e5c6 add cE

  |

  o  0:54ccbc537fc2 add cA

and no divergence

  $ hg summary

  parent: 9:55c73a90e4b4 tip

   add cJ

  branch: default

  commit: (clean)

  update: 1 new changesets, 2 branch heads (merge)