Mercurial > hg
view tests/test-bad-extension.t @ 38893:23d582caae30
changegroup: capture revision delta in a data structure
The current changegroup generation code is tightly coupled to
the revlog API. This tight coupling makes it difficult to implement
alternate storage backends without requiring a large surface area
of the revlog API to be exposed. This is not desirable.
In order to support changegroup generation with non-revlog storage,
we'll need to abstract the concept of delta generation.
This commit is the first step down that road. We introduce a
data structure for representing a delta in a changegroup.
The API still leaves a lot to be desired. But at least we now
have separation between data and actions performed on it.
As part of this, we tweak behavior slightly: we no longer
concatenate the delta prefix with the metadata header. Instead,
we track and emit the prefix as a separate chunk. This shouldn't
have any meaningful impact since all the chunks just get sent to
the wire, the compressor, etc.
Because we're introducing a new object, this does add some
overhead to changegroup execution. `hg perfchangegroupchangelog`
on my clone of the Mercurial repo (~40,000 visible revisions in
the changelog) slows down a bit:
! wall 1.268600 comb 1.270000 user 1.270000 sys 0.000000 (best of 8)
! wall 1.419479 comb 1.410000 user 1.410000 sys 0.000000 (best of 8)
With for `hg bundle -t none-v2 -a /dev/null`:
before: real 6.610 secs (user 6.460+0.000 sys 0.140+0.000)
after: real 7.210 secs (user 7.060+0.000 sys 0.140+0.000)
I plan to claw back this regression in future commits. And I may
even do away with this data structure once the refactor is complete.
For now, it makes things easier to comprehend.
Differential Revision: https://phab.mercurial-scm.org/D4075
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 03 Aug 2018 10:05:26 -0700 |
parents | d58958676b3c |
children | f2e645dc6a67 |
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ensure that failing ui.atexit handlers report sensibly $ cat > $TESTTMP/bailatexit.py <<EOF > from mercurial import util > def bail(): > raise RuntimeError('ui.atexit handler exception') > > def extsetup(ui): > ui.atexit(bail) > EOF $ hg -q --config extensions.bailatexit=$TESTTMP/bailatexit.py \ > help help hg help [-ecks] [TOPIC] show help for a given topic or a help overview error in exit handlers: Traceback (most recent call last): File "*/mercurial/dispatch.py", line *, in _runexithandlers (glob) func(*args, **kwargs) File "$TESTTMP/bailatexit.py", line *, in bail (glob) raise RuntimeError('ui.atexit handler exception') RuntimeError: ui.atexit handler exception [255] $ rm $TESTTMP/bailatexit.py another bad extension $ echo 'raise Exception("bit bucket overflow")' > badext.py $ abspathexc=`pwd`/badext.py $ cat >baddocext.py <<EOF > """ > baddocext is bad > """ > EOF $ abspathdoc=`pwd`/baddocext.py $ cat <<EOF >> $HGRCPATH > [extensions] > gpg = > hgext.gpg = > badext = $abspathexc > baddocext = $abspathdoc > badext2 = > EOF $ hg -q help help 2>&1 |grep extension *** failed to import extension badext from $TESTTMP/badext.py: bit bucket overflow *** failed to import extension badext2: No module named badext2 show traceback $ hg -q help help --traceback 2>&1 | egrep ' extension|^Exception|Traceback|ImportError' *** failed to import extension badext from $TESTTMP/badext.py: bit bucket overflow Traceback (most recent call last): Exception: bit bucket overflow *** failed to import extension badext2: No module named badext2 Traceback (most recent call last): ImportError: No module named badext2 names of extensions failed to load can be accessed via extensions.notloaded() $ cat <<EOF > showbadexts.py > from mercurial import commands, extensions, registrar > cmdtable = {} > command = registrar.command(cmdtable) > @command(b'showbadexts', norepo=True) > def showbadexts(ui, *pats, **opts): > ui.write('BADEXTS: %s\n' % ' '.join(sorted(extensions.notloaded()))) > EOF $ hg --config extensions.badexts=showbadexts.py showbadexts 2>&1 | grep '^BADEXTS' BADEXTS: badext badext2 show traceback for ImportError of hgext.name if devel.debug.extensions is set $ (hg help help --traceback --debug --config devel.debug.extensions=yes 2>&1) \ > | grep -v '^ ' \ > | egrep 'extension..[^p]|^Exception|Traceback|ImportError|not import' debug.extensions: loading extensions debug.extensions: - processing 5 entries debug.extensions: - loading extension: 'gpg' debug.extensions: > 'gpg' extension loaded in * (glob) debug.extensions: - validating extension tables: 'gpg' debug.extensions: - invoking registered callbacks: 'gpg' debug.extensions: > callbacks completed in * (glob) debug.extensions: - loading extension: 'badext' *** failed to import extension badext from $TESTTMP/badext.py: bit bucket overflow Traceback (most recent call last): Exception: bit bucket overflow debug.extensions: - loading extension: 'baddocext' debug.extensions: > 'baddocext' extension loaded in * (glob) debug.extensions: - validating extension tables: 'baddocext' debug.extensions: - invoking registered callbacks: 'baddocext' debug.extensions: > callbacks completed in * (glob) debug.extensions: - loading extension: 'badext2' debug.extensions: - could not import hgext.badext2 (No module named badext2): trying hgext3rd.badext2 Traceback (most recent call last): ImportError: No module named *badext2 (glob) debug.extensions: - could not import hgext3rd.badext2 (No module named badext2): trying badext2 Traceback (most recent call last): ImportError: No module named *badext2 (glob) *** failed to import extension badext2: No module named badext2 Traceback (most recent call last): ImportError: No module named badext2 debug.extensions: > loaded 2 extensions, total time * (glob) debug.extensions: - loading configtable attributes debug.extensions: - executing uisetup hooks debug.extensions: - running uisetup for 'gpg' debug.extensions: > uisetup for 'gpg' took * (glob) debug.extensions: - running uisetup for 'baddocext' debug.extensions: > uisetup for 'baddocext' took * (glob) debug.extensions: - executing extsetup hooks debug.extensions: - running extsetup for 'gpg' debug.extensions: > extsetup for 'gpg' took * (glob) debug.extensions: - running extsetup for 'baddocext' debug.extensions: > extsetup for 'baddocext' took * (glob) debug.extensions: - executing remaining aftercallbacks debug.extensions: > remaining aftercallbacks completed in * (glob) debug.extensions: - loading extension registration objects debug.extensions: > extension registration object loading took * (glob) debug.extensions: extension loading complete confirm that there's no crash when an extension's documentation is bad $ hg help --keyword baddocext *** failed to import extension badext from $TESTTMP/badext.py: bit bucket overflow *** failed to import extension badext2: No module named badext2 Topics: extensions Using Additional Features