perf: use a formatter for output
We use a `formatter` object in the perf extensions. This allow the use of
formatted output like json. To avoid adding logic to create a formatter and pass
it around to the timer function in every command, we add a `gettimer` function
in charge of returning a `timer` function as simple as before but embedding an
appropriate formatter.
This new `gettimer` function also return the formatter as it needs to be
explicitly closed at the end of the command.
example output:
$ hg --config ui.formatjson=True perfvolatilesets visible obsolete
[
{
"comb": 0.02,
"count": 126,
"sys": 0.0,
"title": "obsolete",
"user": 0.02,
"wall": 0.0199398994446
},
{
"comb": 0.02,
"count": 117,
"sys": 0.0,
"title": "visible",
"user": 0.02,
"wall": 0.0250301361084
}
]
#require serve
$ hg init test
$ cd test
$ cat > .hg/hgrc <<EOF
> [extensions]
> # this is only necessary to check that the mapping from
> # interhg to websub works
> interhg =
>
> [websub]
> issues = s|Issue(\d+)|<a href="http://bts.example.org/issue\1">Issue\1</a>|
>
> [interhg]
> # check that we maintain some interhg backwards compatibility...
> # yes, 'x' is a weird delimiter...
> markbugs = sxbugx<i class="\x">bug</i>x
> EOF
$ touch foo
$ hg add foo
$ hg commit -d '1 0' -m 'Issue123: fixed the bug!'
$ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
log
$ "$TESTDIR/get-with-headers.py" localhost:$HGPORT "rev/tip" | grep bts
<div class="description"><a href="http://bts.example.org/issue123">Issue123</a>: fixed the <i class="x">bug</i>!</div>
errors
$ cat errors.log
$ cd ..