revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
#!/bin/sh
commit()
{
msg=$1
p1=$2
p2=$3
if [ "$p1" ]; then
hg up -qC $p1
fi
if [ "$p2" ]; then
HGMERGE=true hg merge -q $p2
fi
echo >> foo
hg commit -d '0 0' -qAm "$msg" foo
}
hg init repo
cd repo
echo '[extensions]' > .hg/hgrc
echo 'hgext.parentrevspec =' >> .hg/hgrc
commit '0: add foo'
commit '1: change foo 1'
commit '2: change foo 2a'
commit '3: change foo 3a'
commit '4: change foo 2b' 1
commit '5: merge' 3 4
commit '6: change foo again'
hg log --template '#rev#:#node|short# #parents#\n'
echo
lookup()
{
for rev in "$@"; do
printf "$rev: "
hg id -nr $rev
done
true
}
tipnode=`hg id -ir tip`
echo 'should work with tag/branch/node/rev'
for r in tip default $tipnode 6; do
lookup "$r^"
done
echo
echo 'some random lookups'
lookup "6^^" "6^^^" "6^^^^" "6^^^^^" "6^^^^^^" "6^1" "6^2" "6^^2" "6^1^2" "6^^3"
lookup "6~" "6~1" "6~2" "6~3" "6~4" "6~5" "6~42" "6~1^2" "6~1^2~2"
echo
echo 'with a tag "6^" pointing to rev 1'
hg tag -l -r 1 "6^"
lookup "6^" "6^1" "6~1" "6^^"
echo
echo 'with a tag "foo^bar" pointing to rev 2'
hg tag -l -r 2 "foo^bar"
lookup "foo^bar" "foo^bar^"