[issue932] glog/view fail to match lines of development

[Joel Rosdahl]

Thomas Arendsen Hein <mercurial-bugs at selenic.com> writes:

> New submission from Thomas Arendsen Hein <thomas at intevation.de>:
>
> Using hg glog from and on current hg-stable (03ce5a919ae3) yields up
> to 65 lines of parallel development. Doing the same thing on the
> main repo (even if using -r 03ce5a919ae3:null) doesn't show the
> problem.
>
> Steve Borho mentioned that "hg view --limit 0" shows the same problem.

Well, the graph of hg-stable really does look that way. The phenomenon
occurs because the two repos have changesets in different orders.
Notice that the "Merge with crew-stable" changesets in hg-stable tend
to have one parent several hundred revisions away. The same changesets
have much closer parents in the main repo.

Consider this graph:

@    H
|\
| o  Y5
| |
o |  X5
|\|
| o  Y4
| |
o |  X4
|\|
| o  Y3
| |
o |  X3
|\|
| o  Y2
| |
o |  X2
|\|
| o  Y1
| |
o |  X1
|\|
| o  Y0
| |
o |  X0
|/
o  B

What if we reorder the changesets a bit?

@    H
|\
| o    X5
| |\
| | o    X4
| | |\
| | | o    X3
| | | |\
| | | | o    X2
| | | | |\
| | | | | o    X1
| | | | | |\
| | | | | | o  X0
| | | | | | |
o | | | | | |  Y5
|/ / / / / /
o / / / / /  Y4
|/ / / / /
o / / / /  Y3
|/ / / /
o / / /  Y2
|/ / /
o / /  Y1
|/ /
o /  Y0
|/
o  B

Regards,
Joel

-- 
Joel Rosdahl <joel at rosdahl.net>
Key BB845E97; fingerprint 9F4B D780 6EF4 5700 778D  8B22 0064 F9FF BB84 5E97