absorb: preserve changesets which were already empty
Most commands in Mercurial (commit, rebase, absorb itself) don’t create empty
changesets or drop them if they become empty. If there’s a changeset that’s
empty, it must be a deliberate choice of the user. At least it shouldn’t be
absorb’s responsibility to prune them. The fact that changesets that became
empty during absorb are pruned, is unaffected by this.
This case was found while writing patches which make it possible to configure
absorb and rebase to not drop empty changesets. Even without having such config
set, I think it’s valuable to preserve changesets which were already empty.
CACHEDIR=$PWD/hgcache
cat >> $HGRCPATH <<EOF
[remotefilelog]
cachepath=$CACHEDIR
debug=True
[extensions]
remotefilelog=
rebase=
strip=
[ui]
ssh=python "$TESTDIR/dummyssh"
[server]
preferuncompressed=True
[experimental]
changegroup3=True
[rebase]
singletransaction=True
EOF
hgcloneshallow() {
local name
local dest
orig=$1
shift
dest=$1
shift
hg clone --shallow --config remotefilelog.reponame=master $orig $dest $@
cat >> $dest/.hg/hgrc <<EOF
[remotefilelog]
reponame=master
[phases]
publish=False
EOF
}
hgcloneshallowlfs() {
local name
local dest
local lfsdir
orig=$1
shift
dest=$1
shift
lfsdir=$1
shift
hg clone --shallow --config "extensions.lfs=" --config "lfs.url=$lfsdir" --config remotefilelog.reponame=master $orig $dest $@
cat >> $dest/.hg/hgrc <<EOF
[extensions]
lfs=
[lfs]
url=$lfsdir
[remotefilelog]
reponame=master
[phases]
publish=False
EOF
}
clearcache() {
rm -rf $CACHEDIR/*
}
mkcommit() {
echo "$1" > "$1"
hg add "$1"
hg ci -m "$1"
}
ls_l() {
$PYTHON $TESTDIR/ls-l.py "$@"
}
identifyrflcaps() {
xargs -n 1 echo | egrep '(remotefilelog|getflogheads|getfile)' | sort
}