Mercurial > hg
view tests/test-symlink-placeholder.t @ 30706:2e4862646f02
repair: speed up stripping of many roots
repair.strip() expects a set of root revisions to strip. It then
builds the full set of descedants by walking the descandants of
each. It is rare that more than a few roots get passed in, but if that
happens, it will wastefully walk the changelog for each root. So let's
just walk it once.
I noticed this because the narrowhg extension was passing not only
roots, but all the commits to strip. When there were tens of thousands
of commits to strip, this resulted in quadratic behavior with that
extension.
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Wed, 04 Jan 2017 10:07:12 -0800 |
parents | 7a9cbb315d84 |
children | 0a10f142299d |
line wrap: on
line source
#require symlink Create extension that can disable symlink support: $ cat > nolink.py <<EOF > from mercurial import extensions, util > def setflags(orig, f, l, x): > pass > def checklink(orig, path): > return False > def extsetup(ui): > extensions.wrapfunction(util, 'setflags', setflags) > extensions.wrapfunction(util, 'checklink', checklink) > EOF $ hg init unix-repo $ cd unix-repo $ echo foo > a $ ln -s a b $ hg ci -Am0 adding a adding b $ cd .. Simulate a checkout shared on NFS/Samba: $ hg clone -q unix-repo shared $ cd shared $ rm b $ echo foo > b $ hg --config extensions.n=$TESTTMP/nolink.py status --debug ignoring suspect symlink placeholder "b" Make a clone using placeholders: $ hg --config extensions.n=$TESTTMP/nolink.py clone . ../win-repo updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd ../win-repo $ cat b a (no-eol) $ hg --config extensions.n=$TESTTMP/nolink.py st --debug Empty placeholder: $ rm b $ touch b $ hg --config extensions.n=$TESTTMP/nolink.py st --debug ignoring suspect symlink placeholder "b" Write binary data to the placeholder: >>> open('b', 'w').write('this is a binary\0') $ hg --config extensions.n=$TESTTMP/nolink.py st --debug ignoring suspect symlink placeholder "b" Write a long string to the placeholder: >>> open('b', 'w').write('this' * 1000) $ hg --config extensions.n=$TESTTMP/nolink.py st --debug ignoring suspect symlink placeholder "b" Commit shouldn't succeed: $ hg --config extensions.n=$TESTTMP/nolink.py ci -m1 nothing changed [1] Write a valid string to the placeholder: >>> open('b', 'w').write('this') $ hg --config extensions.n=$TESTTMP/nolink.py st --debug M b $ hg --config extensions.n=$TESTTMP/nolink.py ci -m1 $ hg manifest tip --verbose 644 a 644 @ b $ cd ..