cache: adds debug details about what the content of the update
Having more data in debug is good, we add a small method to help providing them.
This code was headed for core during the 4.3 cycle but never made it there. So
we starts with a copy in the evolve repository.
#!/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