branchcache: add a "pure topological head" fast path
In a narrow but actually quick common case, all topological heads are all on
the same branch and all open. In this case, computing the branch map is very
simple. We can quickly detect situation where this situation will not change.
So we update the V3 format to be able to express this situation and upgrade the
update code to detect we remains in that mode.
The branch cache is populated with the actual value when the branch map is
accessed, but the update_disk method can do the update without needing to
populate it.
Test graph-related template functions
=====================================
$ cat <<'EOF' >> $HGRCPATH
> [extensions]
> drawdag = $RUNTESTDIR/drawdag.py
> EOF
$ hg init a
$ cd a
$ hg debugdrawdag <<'EOF'
> l
> / \
> | k
> | |\
> | | j
> | | |
> i | |
> |\ | |
> h | | |
> | | | |
> | g | |
> | | | |
> f | | |
> | |/ /
> | e |
> | |/
> | d
> |/|
> c |
> | |
> b |
> |
> a
> EOF
$ hg log -Gq -T'{rev} {tags}\n'
o 11 l tip
|\
| o 10 i
| |\
o \ \ 9 k
|\ \ \
+-----o 8 g
| | |
| o | 7 j
| | |
| | o 6 h
| | |
o | | 5 e
|/ /
| o 4 f
| |
o | 3 d
|\|
| o 2 c
| |
| o 1 b
|
o 0 a
$ cd ..
Create repository containing merges of p1 > p2:
$ hg init named-branch-order
$ cd named-branch-order
$ hg branch -q b0
$ hg ci -m 0
$ hg up -q null
$ hg branch -q b1
$ hg ci -m 1
$ hg up -q null
$ hg branch -q b2
$ hg ci -m 2
$ hg merge -q 1
$ hg ci -m 3
$ hg ci -m 4 --config ui.allowemptycommit=true
$ hg merge -q 0
$ hg ci -m 5
$ hg ci -m 6 --config ui.allowemptycommit=true
$ hg up -q 1
$ hg branch -q b7
$ hg ci -m 7
$ hg ci -m 8 --config ui.allowemptycommit=true
$ hg up -q 6
$ hg ci -m 9 --config ui.allowemptycommit=true
$ hg up -q 8
$ hg merge -q 9
$ hg ci -m 10
$ hg log -Gq -T'{rev} {branch} -> {p1.rev} {p2.rev}\n'
@ 10 b7 -> 8 9
|\
| o 9 b2 -> 6 -1
| |
o | 8 b7 -> 7 -1
| |
o | 7 b7 -> 1 -1
| |
| o 6 b2 -> 5 -1
| |
| o 5 b2 -> 4 0
| |\
| | o 4 b2 -> 3 -1
| | |
+---o 3 b2 -> 2 1
| | |
| | o 2 b2 -> -1 -1
| |
o | 1 b1 -> -1 -1
/
o 0 b0 -> -1 -1
$ cd ..
subsetparents
-------------
$ cd a
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+i"))}\n' -r 'c+i'
o 10 i: 2
:
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+h+i"))}\n' -r 'c+h+i'
o 10 i: 6
|\
o : 6 h: 2
:/
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+h+l"))}\n' -r 'c+h+l'
o 11 l tip: 6
:\
: o 6 h: 2
:/
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+f+l"))}\n' -r 'c+f+l'
o 11 l tip: 4
:\
: o 4 f: 2
:/
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+h+i+k"))}\n' -r 'c+h+i+k'
o 10 i: 6
|\
| : o 9 k: 2
| :/
o : 6 h: 2
:/
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+d+h+i+k"))}\n' -r 'c+d+h+i+k'
o 10 i: 6 3
|\
| : o 9 k: 3
| :/
o : 6 h: 2
: :
: o 3 d: 2
:/|
: ~
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+j+k+i"))}\n' -r 'c+j+k+i'
o 10 i: 2
:
: o 9 k: 7
:/|
: o 7 j: 2
:/
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("c+e+f+j"))}\n' -r 'c+e+f+j'
o 7 j: 2
:
: o 5 e: 2
:/
: o 4 f: 2
:/
o 2 c:
|
~
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("b+e+f+j"))}\n' -r 'b+e+f+j'
o 7 j: 1
:
: o 5 e: 1
:/
: o 4 f: 1
:/
o 1 b:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("a+c+f+g+j+l"))}\n' -r 'a+c+f+g+j+l'
o 11 l tip: 4 8 7
:\
: \
: :\
: : \
: : :\
: : : \
: : : :\
: o---+ : 8 g: 0 2
: :/ / /
: +---o 7 j: 0 2
: : :/
o---+ 4 f: 2
/ /
: o 2 c:
: |
: ~
o 0 a:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("b+i+l"))}\n' -r 'b+i+l'
o 11 l tip: 10
|\
o : 10 i: 1
:/
o 1 b:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("b+i+j+l"))}\n' -r 'b+i+j+l'
o 11 l tip: 10 7
|\
| \
| :\
o : : 10 i: 1
:/ /
: o 7 j: 1
:/
o 1 b:
null in subset:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("null+a+c+f"))}\n' -r 'null+a+c+f'
o 4 f: 2
|
o 2 c: -1
:
: o 0 a: -1
:/
@ -1 : -1
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("null+a+b+c+f"))}\n' -r 'null+a+b+c+f'
o 4 f: 2
|
o 2 c: 1
|
o 1 b: -1
|
| o 0 a: -1
|/
@ -1 : -1
wdir in subset:
$ hg update -qC i
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("f+k+wdir()"))}\n' -r 'f+k+wdir()'
o 2147483647 : 4
:
: o 9 k:
: |\
: ~ ~
o 4 f:
|
~
$ hg update -qC null
Revisions not in subset:
$ hg log -T '{rev} {tags}: {subsetparents(rev, revset("a+c+f+g+j+l"))}\n'
11 l tip: 4 8 7
10 i:
9 k:
8 g: 0 2
7 j: 0 2
6 h:
5 e:
4 f: 2
3 d:
2 c:
1 b:
0 a:
$ hg log -T '{rev} {tags}: {subsetparents(rev, revset("b+c"))}\n'
11 l tip:
10 i:
9 k:
8 g:
7 j:
6 h:
5 e:
4 f:
3 d:
2 c: 1
1 b:
0 a:
$ hg log -T '{rev} {tags}: {subsetparents(rev, revset("b+c"))}\n' -r'reverse(null:2)'
2 c: 1
1 b:
0 a:
-1 :
Nothing excluded:
$ hg log -T '{rev} {tags}: {subsetparents(rev, revset("null:wdir()"))}\n' -r'reverse(null:wdir())'
2147483647 : -1
11 l tip: 10 9
10 i: 6 8
9 k: 5 7
8 g: 5
7 j: 3
6 h: 4
5 e: 3
4 f: 2
3 d: 0 2
2 c: 1
1 b: -1
0 a: -1
-1 : -1
Uncachable query:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("%d:%d", rev, rev - 1))}\n'
o 11 l tip: 10
|\
| o 10 i:
| |\
o \ \ 9 k:
|\ \ \
+-----o 8 g:
| | |
| o | 7 j:
| | |
| | o 6 h:
| | |
o | | 5 e:
|/ /
| o 4 f:
| |
o | 3 d: 2
|\|
| o 2 c: 1
| |
| o 1 b:
|
o 0 a: -1
Invalid arguments:
$ hg log -T '{subsetparents()}\n'
hg: parse error: subsetparents expects two arguments
[10]
$ hg log -T '{subsetparents("a")}\n'
hg: parse error: subsetparents expects two arguments
[10]
$ hg log -T '{subsetparents(rev, extras)}\n'
hg: parse error: subsetparents expects a queried revset
[10]
$ cd ..
subsetparents: p1/p2 order
-------------------------
$ cd named-branch-order
Parents should be sorted in p1/p2 order since p1 is likely to belong to
the same named branch:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("0+1+2+6"))}\n' -r '0+1+2+6'
o 6 : 2 1 0
:\
: \
: :\
: : o 2 :
: :
: o 1 :
:
o 0 :
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("0+1+2+6+10"))}\n' -r '0+1+2+6+10'
@ 10 tip: 6
:\
: o 6 : 2 1 0
:/:\
: : o 2 :
: :
o : 1 :
/
o 0 :
And p1 path should be selected if both p1/p2 paths exist:
$ hg log -Gq -T '{rev} {tags}: {subsetparents(rev, revset("0+1+2+10"))}\n' -r '0+1+2+10'
@ 10 tip: 1 2 0
:\
: \
: :\
: : o 2 :
: :
o : 1 :
/
o 0 :
$ cd ..