evolve: refactor the code which swap two nodes (in divergence resolution)
I see that we are using the code to swap the "divergent" and "other" node;
and updating the evolvestate accordingly at many places in divergence
resolution. This patch extract that code to a function.
Although I don't have strong opinion on this patch. It's a volunteered
patch to remove some redundancy.
#!/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