Correct optimization from 3464f5e77f34; add a test.
If there are two (or more) heads that point to the same .hgtags
node, we can safely skip parsing the file in all but the last head.
(In 3464f5e77f34, we were parsing the file in the first head and
skipping all the others.)
adding x
Patch queue now empty
% should fail
abort: no patches applied
applying a.patch
Now at: a.patch
% should guard a.patch
% should print +a
a.patch: +a
Patch queue now empty
a.patch: +a
% should push b.patch
applying b.patch
Now at: b.patch
Patch queue now empty
number of unguarded, unapplied patches has changed from 2 to 3
% should push a.patch
applying a.patch
Now at: a.patch
% should print -a
c.patch: -a
% should skip c.patch
applying b.patch
skipping c.patch - guarded by '- a'
Now at: b.patch
% should push c.patch
applying c.patch
Now at: c.patch
Patch queue now empty
guards deactivated
number of unguarded, unapplied patches has changed from 3 to 2
% should push all
applying b.patch
applying c.patch
Now at: c.patch
Patch queue now empty
number of unguarded, unapplied patches has changed from 1 to 2
% should push a.patch, not b.patch
applying a.patch
Now at: a.patch
applying c.patch
Now at: c.patch
Patch queue now empty
% should push b.patch
applying b.patch
Now at: b.patch
Patch queue now empty
number of unguarded, unapplied patches has changed from 2 to 3
% should push a.patch, b.patch
applying a.patch
Now at: a.patch
applying b.patch
Now at: b.patch
Patch queue now empty
number of unguarded, unapplied patches has changed from 3 to 2
% list patches and guards
a.patch: +1 +2 -3
b.patch: +2
c.patch: unguarded
% list series
0 G a.patch
1 U b.patch
2 U c.patch
% list guards
1
2
3
% should push b.patch
applying b.patch
Now at: b.patch
applying c.patch
Now at: c.patch
guards deactivated
popping guarded patches
Patch queue now empty
reapplying unguarded patches
applying c.patch
Now at: c.patch
% guards in series file: +1 +2 -3
+1
+2
-3
% should show c.patch
c.patch