tags: have a different cache file per filter level
Currently whichever filter level asks for tags last will write the data on disk.
This create massive issues when tags are read for "visible" and "unfiltered"
on large and multi headed repository (like Mozilla central). See issue4550 for
details
Each filter level recomputes its own cache without direct collaboration but they
all share the same 'hgtagsfnodes' cache. And that is where most of the time is
spent.
$ cat >> $HGRCPATH << EOF
> [extensions]
> rebase=
>
> [experimental]
> evolution = createmarkers
> EOF
Create a repo with some tags
$ hg init repo
$ cd repo
$ echo initial > foo
$ hg -q commit -A -m initial
$ hg tag -m 'test tag' test1
$ echo first > first
$ hg -q commit -A -m first
$ hg tag -m 'test2 tag' test2
$ hg -q up -r 0
$ echo newhead > newhead
$ hg commit -A -m newhead
adding newhead
created new head
Trigger tags cache population by doing something that accesses tags info
$ hg log -G -T '{rev}:{node|short} {tags} {desc}\n'
@ 4:042eb6bfcc49 tip newhead
|
| o 3:c3cb30f2d2cd test2 tag
| |
| o 2:d75775ffbc6b test2 first
| |
| o 1:5f97d42da03f test tag
|/
o 0:55482a6fb4b1 test1 initial
$ cat .hg/cache/tags-visible
4 042eb6bfcc4909bad84a1cbf6eb1ddf0ab587d41
3 c3cb30f2d2cd0aae008cc91a07876e3c5131fd22 b3bce87817fe7ac9dca2834366c1d7534c095cf1
55482a6fb4b1881fa8f746fd52cf6f096bb21c89 test1
d75775ffbc6bca1794d300f5571272879bd280da test2
Create some hidden changesets via a rebase and trigger tags cache
repopulation
$ hg -q rebase -s 1 -d 4
$ hg log -G -T '{rev}:{node|short} {tags} {desc}\n'
o 7:eb610439e10e tip test2 tag
|
o 6:7b4af00c3c83 first
|
o 5:43ac2a539b3c test tag
|
@ 4:042eb6bfcc49 newhead
|
o 0:55482a6fb4b1 test1 initial
.hgtags filenodes for hidden heads should be visible (issue4550)
(currently broken)
$ cat .hg/cache/tags-visible
7 eb610439e10e0c6b296f97b59624c2e24fc59e30 b3bce87817fe7ac9dca2834366c1d7534c095cf1
55482a6fb4b1881fa8f746fd52cf6f096bb21c89 test1
d75775ffbc6bca1794d300f5571272879bd280da test2