view tests/test-children.out @ 6369:53912d30ac40

Avoid calling heads() twice on every hg commit.

In an extreme case (merging two revisions with very low revision numbers)
this could be slower than the previous code, but it should be much faster
in the usual cases (parents are near the tip).  It also avoids some races
in some uninteresting cases (e.g. two concurrent hg commits).

% init
% no working directory
% setup
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
% hg children at revision 3 (tip)
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
% hg children at nullrev (should be 0 and 3)
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% hg children at revision 1 (should be 2)
changeset:   2:8f5eea5023c2
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     2

1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% hg children at revision 2 (other head)
% hg children -r null
changeset:   0:4df8521a7374
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     0

changeset:   3:e2962852269d
tag:         tip
parent:      -1:000000000000
user:        test
date:        Thu Jan 01 00:00:03 1970 +0000
summary:     3

% hg children -r 0
changeset:   1:708c093edef0
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     1

% hg children -r 1
changeset:   2:8f5eea5023c2
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     2

% hg children -r 2
% hg children -r 3
% hg children -r 0 file0 (should be 2)
changeset:   2:8f5eea5023c2
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     2

% hg children -r 1 file0 (should be 2)
changeset:   2:8f5eea5023c2
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     2

1 files updated, 0 files merged, 1 files removed, 0 files unresolved
% hg children file0 at revision 0 (should be 2)
changeset:   2:8f5eea5023c2
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     2