view tests/test-rebase-scenario-global.out @ 11335:3201ff1459dd

dagparser: parses and formats DAGs as concise text

As discussed during the sprint. See the doc comment and doctests
for specification and examples. This is used in subsequent patches
to export revlog and changelog DAGs, and to generate a repo with
a given changelog DAG.

@  5: F
|
| o  4: E
|/|
o |  3: D
| |
| o  2: C
|/
| o  1: B
|/
o  0: A

% Rebasing
% B onto F - simple rebase
saved backup bundle to 
@  5: B
|
o  4: F
|
| o  3: E
|/|
o |  2: D
| |
| o  1: C
|/
o  0: A

% B onto D - intermediate point
saved backup bundle to 
@  5: B
|
| o  4: F
|/
| o  3: E
|/|
o |  2: D
| |
| o  1: C
|/
o  0: A

% C onto F - skip of E
saved backup bundle to 
@  4: C
|
o  3: F
|
o  2: D
|
| o  1: B
|/
o  0: A

% D onto C - rebase of a branching point (skip E)
saved backup bundle to 
@  4: F
|
o  3: D
|
o  2: C
|
| o  1: B
|/
o  0: A

% E onto F - merged revision having a parent in ancestors of target
saved backup bundle to 
@    5: E
|\
| o  4: F
| |
| o  3: D
| |
o |  2: C
|/
| o  1: B
|/
o  0: A

% D onto B - E maintains C as parent
saved backup bundle to 
@  5: F
|
| o  4: E
|/|
o |  3: D
| |
| o  2: C
| |
o |  1: B
|/
o  0: A

% These will fail (using --source)
% E onto D - rebase onto an ancestor
abort: source is descendant of destination
% D onto E - rebase onto a descendant
abort: source is ancestor of destination
% E onto B - merge revision with both parents not in ancestors of target
abort: cannot use revision 4 as base, result would have 3 parents

% These will abort gracefully (using --base)
% E onto E - rebase onto same changeset
nothing to rebase
% E onto D - rebase onto an ancestor
nothing to rebase
% D onto E - rebase onto a descendant
nothing to rebase