update: add comments and test cases for updating across branches
Add comment to merge.py:update() showing various cases of 'hg update': to a
descendant, crossing named branches, and crossing branches within a named
branch; with no option, -c or -C; with or without uncommitted changes; and
with or without a specific revision. Add tests for all of these cases.
% initial repo state
@ 5:e1bb631146ca b1
|
o 4:a4fdb3b883c4 0:b608b9236435 b1
|
| o 3:4b57d2520816 1:44592833ba9f
| |
| | o 2:063f31070f65
| |/
| o 1:44592833ba9f
|/
o 0:b608b9236435
% norevtest none clean linear 4
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=5
% norevtest none clean same 2
abort: crosses branches (use 'hg merge' or 'hg update -C')
parent=2
% revtest none clean linear 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
% revtest none clean same 2 3
abort: crosses branches (use 'hg merge' or 'hg update -C')
parent=2
% revtest none clean cross 3 4
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=4
% revtest none dirty linear 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
M foo
% revtest none dirty same 2 3
abort: crosses branches (use 'hg merge' or 'hg update -C' to discard changes)
parent=2
M foo
% revtest none dirty cross 3 4
abort: crosses named branches (use 'hg update -C' to discard changes)
parent=3
M foo
% revtest -C dirty linear 1 2
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
% revtest -c dirty linear 1 2
abort: uncommitted local changes
parent=1
M foo
% norevtest -c clean same 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=3
% revtest -cC dirty linear 1 2
abort: cannot specify both -c/--check and -C/--clean
parent=1
M foo