stablerange: use the new cache object in the 'mergepoint' version
Every improvement to the cache should reflect on the stable range from there.
Since we no longer use the basic sort function, we can simplify the inheritance
by dropping one layer.
#!/bin/bash
set -euox pipefail
unset GREP_OPTIONS
NOTOPIC="--config experimental.topic-mode=ignore"
compatbranches=`hg branches --quiet | grep 'mercurial-' | grep -v ':' | sort -n --reverse`
prev='stable'
for branch in $compatbranches; do
hg up $branch
hg merge $prev
hg commit -m "test-compat: merge $prev into $branch"
prev=$branch
done