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strip: calculate list of extra nodes to save and pass it to changegroupsubset...
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.
Alexis S. L. Carvalho - - Load All Authors

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test-strip-cross
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#!/bin/sh
# test stripping of filelogs where the linkrev doesn't always increase
echo '[extensions]' >> $HGRCPATH
echo 'hgext.mq =' >> $HGRCPATH
hg init orig
cd orig
hidefilename()
{
sed -e 's/saving bundle to .*strip-backup/saving bundle to strip-backup/'
}
commit()
{
hg up -qC null
count=1
for i in "$@"; do
for f in $i; do
echo $count > $f
done
count=`expr $count + 1`
done
hg commit -qAm "$*"
}
# 2 1 0 2 0 1 2
commit '201 210'
commit '102 120' '210'
commit '021'
commit '201' '021 120'
commit '012 021' '102 201' '120 210'
commit '102 120' '012 210' '021 201'
commit '201 210' '021 120' '012 102'
cd ..
hg clone -q -U -r -1 -r -2 -r -3 orig crossed
for i in crossed/.hg/store/{00manifest.i,data/*.i}; do
echo $i
hg debugindex $i
echo
done
for i in 0 1 2; do
hg clone -q -U --pull crossed $i
echo "% Trying to strip revision $i"
hg --cwd $i strip $i 2>&1 | hidefilename
echo "% Verifying"
hg --cwd $i verify
echo
done