phases: avoid N² behavior in `advanceboundary`
We allowed duplicated entries in the deque, which each entry could potentially
insert all its ancestors. So advancing boundary for the full repository would
mean each revision would walk all its ancestors, resulting in O(N²) iteration.
For repository of any decent size, N² is quickly insane.
We introduce a simple set to avoid this and get back to reasonable performance.
$ hg init test-content
$ cd test-content
$ hg debugbuilddag '+2*2*3*4+7'
$ hg bookmark -r 1 @
$ hg log -G --template '{rev}:{node|short}'
o 11:1d876b1f862c
|
o 10:ea5f71948eb8
|
o 9:f1b0356d867a
|
o 8:e8d1253fb0d7
|
o 7:d423bbba4459
|
o 6:a2f58e9c1e56
|
o 5:3a367db1fabc
|
o 4:e7bd5218ca15
|
| o 3:6100d3090acf
|/
| o 2:fa942426a6fd
|/
| o 1:66f7d451a68b
|/
o 0:1ea73414a91b
$ hg --config extensions.closehead= close-head -m 'Not a head' 0 1
abort: revision is not an open head: 0
[255]
$ hg --config extensions.closehead= close-head -m 'Not a head' -r 0 1
abort: revision is not an open head: 0
[255]
$ hg id
000000000000
$ hg --config extensions.closehead= close-head -m 'Close old heads' -r 1 2
$ hg id
000000000000
$ hg bookmark
@ 1:66f7d451a68b
$ hg heads
changeset: 11:1d876b1f862c
user: debugbuilddag
date: Thu Jan 01 00:00:11 1970 +0000
summary: r11
changeset: 3:6100d3090acf
parent: 0:1ea73414a91b
user: debugbuilddag
date: Thu Jan 01 00:00:03 1970 +0000
summary: r3
$ hg --config extensions.closehead= close-head -m 'Close more old heads' -r 11
$ hg heads
changeset: 3:6100d3090acf
parent: 0:1ea73414a91b
user: debugbuilddag
date: Thu Jan 01 00:00:03 1970 +0000
summary: r3
$ hg --config extensions.closehead= close-head -m 'Not a head' 0
abort: revision is not an open head: 0
[255]
$ hg --config extensions.closehead= close-head -m 'Already closed head' 1
abort: revision is not an open head: 1
[255]
$ hg init ../test-empty
$ cd ../test-empty
$ hg debugbuilddag '+1'
$ hg log -G --template '{rev}:{node|short}'
o 0:1ea73414a91b
$ hg --config extensions.closehead= close-head -m 'Close initial revision' 0
$ hg heads
[1]