$ cat >> $HGRCPATH<<EOF

  > [extensions]

  > drawdag=$TESTDIR/drawdag.py

  > [experimental]

  > EOF

  $ reinit () {

  >   rm -rf .hg && hg init

  > }

  $ hg init

Test what said in drawdag.py docstring

  $ hg debugdrawdag <<'EOS'

  > c d

  > |/

  > b

  > |

  > a

  > EOS

  $ hg log -G -T '{rev} {desc} ({tags})'

  o  3 d (d tip)

  |

  | o  2 c (c)

  |/

  o  1 b (b)

  |

  o  0 a (a)

  $ hg debugdrawdag <<'EOS'

  >  foo    bar       bar  foo

  >   |     /          |    |

  >  ancestor(c,d)     a   baz

  > EOS

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

  o    foo

  |\

  +---o  bar

  | | |

  | o |  baz

  |  /

  +---o  d

  | |

  +---o  c

  | |

  o |  b

  |/

  o  a

  $ reinit

  $ hg debugdrawdag <<'EOS'

  > o    foo

  > |\

  > +---o  bar

  > | | |

  > | o |  baz

  > |  /

  > +---o  d

  > | |

  > +---o  c

  > | |

  > o |  b

  > |/

  > o  a

  > EOS

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

  o    foo

  |\

  | | o  d

  | |/

  | | o  c

  | |/

  | | o  bar

  | |/|

  | o |  b

  | |/

  o /  baz

   /

  o  a

  $ reinit

  $ hg debugdrawdag <<'EOS'

  > o    foo

  > |\

  > | | o  d

  > | |/

  > | | o  c

  > | |/

  > | | o  bar

  > | |/|

  > | o |  b

  > | |/

  > o /  baz

  >  /

  > o  a

  > EOS

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

  o    foo

  |\

  | | o  d

  | |/

  | | o  c

  | |/

  | | o  bar

  | |/|

  | o |  b

  | |/

  o /  baz

   /

  o  a

  $ hg manifest -r a

  a

  $ hg manifest -r b

  a

  b

  $ hg manifest -r bar

  a

  b

  $ hg manifest -r foo

  a

  b

  baz

Edges existed in repo are no-ops

  $ reinit

  $ hg debugdrawdag <<'EOS'

  > B C C

  > | | |

  > A A B

  > EOS

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

  o    C

  |\

  | o  B

  |/

  o  A

  $ hg debugdrawdag <<'EOS'

  > C D C

  > | | |

  > B B A

  > EOS

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

  o  D

  |

  | o  C

  |/|

  o |  B

  |/

  o  A

Node with more than 2 parents are disallowed

  $ hg debugdrawdag <<'EOS'

  >   A

  >  /|\

  > D B C

  > EOS

  abort: A: too many parents: C D B

  [255]

Cycles are disallowed

  $ hg debugdrawdag <<'EOS'

  > A

  > |

  > A

  > EOS

  abort: the graph has cycles

  [255]

  $ hg debugdrawdag <<'EOS'

  > A

  > |

  > B

  > |

  > A

  > EOS

  abort: the graph has cycles

  [255]

Create obsmarkers via comments

  $ reinit

  $ hg debugdrawdag <<'EOS'

  >       G

  >       |

  > I D C F   # split: B -> E, F, G

  >  \ \| |   # replace: C -> D -> H

  >   H B E   # prune: F, I

  >    \|/

  >     A

  > EOS

  $ hg log -r 'sort(all(), topo)' -G --hidden -T '{desc} {node}'

  o  G 711f53bbef0bebd12eb6f0511d5e2e998b984846

  |

  x  F 64a8289d249234b9886244d379f15e6b650b28e3

  |

  o  E 7fb047a69f220c21711122dfd94305a9efb60cba

  |

  | x  D be0ef73c17ade3fc89dc41701eb9fc3a91b58282

  | |

  | | x  C 26805aba1e600a82e93661149f2313866a221a7b

  | |/

  | x  B 112478962961147124edd43549aedd1a335e44bf

  |/

  | x  I 58e6b987bf7045fcd9c54f496396ca1d1fc81047

  | |

  | o  H 575c4b5ec114d64b681d33f8792853568bfb2b2c

  |/

  o  A 426bada5c67598ca65036d57d9e4b64b0c1ce7a0

  $ hg debugobsolete

  112478962961147124edd43549aedd1a335e44bf 7fb047a69f220c21711122dfd94305a9efb60cba 64a8289d249234b9886244d379f15e6b650b28e3 711f53bbef0bebd12eb6f0511d5e2e998b984846 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

  26805aba1e600a82e93661149f2313866a221a7b be0ef73c17ade3fc89dc41701eb9fc3a91b58282 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

  be0ef73c17ade3fc89dc41701eb9fc3a91b58282 575c4b5ec114d64b681d33f8792853568bfb2b2c 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

  64a8289d249234b9886244d379f15e6b650b28e3 0 {7fb047a69f220c21711122dfd94305a9efb60cba} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

  58e6b987bf7045fcd9c54f496396ca1d1fc81047 0 {575c4b5ec114d64b681d33f8792853568bfb2b2c} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}