view tests/test-mq-caches @ 5909:f45f7390c1c5

strip: calculate list of extra nodes to save and pass it to changegroupsubset

When we remove revision N from the repository, all revisions >= N are
affected: either it's a descendant from N and will also be removed, or
it's not a descendant of N and will be renumbered.

As a consequence, we have to (at least temporarily) remove all filelog
and manifest revisions that have a linkrev >= N, readding some of them
later.

Unfortunately, it's possible to have a revlog with two revisions
r1 and r2 such that r1 < r2, but linkrev(r1) > linkrev(r2).  If we try
to strip revision linkrev(r1) from the repository, we'll also lose
revision r2 when we truncate this revlog.

We already use changegroupsubset to create a temporary changegroup
containing the revisions that have to be restored, but that function is
unable to detect that we also wanted to save the r2 in the case above.

So we manually calculate these extra nodes and pass it to changegroupsubset.

This should fix issue764.

#!/bin/sh

echo '[extensions]' >> $HGRCPATH
echo 'hgext.mq=' >> $HGRCPATH

show_branch_cache()
{
    branches=.hg/branch.cache
    # force cache (re)generation
    hg log -r does-not-exist 2> /dev/null
    hg log -r tip --template 'tip: #rev#\n'
    if [ -f $branches ]; then
	sort $branches
    else
	echo No $branches
    fi
    if [ "$1" = 1 ]; then
	for b in foo bar; do
	    hg log -r $b --template "branch $b: "'#rev#\n'
	done
    fi
}

hg init a
cd a
hg qinit -c

echo '# mq patch on an empty repo'
hg qnew p1
show_branch_cache

echo > pfile
hg add pfile
hg qrefresh -m 'patch 1'
show_branch_cache

echo
echo '# some regular revisions'
hg qpop
echo foo > foo
hg add foo
echo foo > .hg/branch
hg ci -m 'branch foo' -d '1000000 0'

echo bar > bar
hg add bar
echo bar > .hg/branch
hg ci -m 'branch bar' -d '1000000 0'
show_branch_cache

echo
echo '# add some mq patches'
hg qpush
show_branch_cache

hg qnew p2
echo foo > .hg/branch
echo foo2 >> foo
hg qrefresh -m 'patch 2'
show_branch_cache 1

echo
echo '# removing the cache'
rm .hg/branch.cache
show_branch_cache 1

echo
echo '# importing rev 1 (the cache now ends in one of the patches)'
hg qimport -r 1 -n p0
show_branch_cache 1
hg log -r qbase --template 'qbase: #rev#\n'

echo
echo '# detect an invalid cache'
hg qpop -a
hg qpush -a
show_branch_cache