evolvestate: add a class to wrap the state of `hg evolve` command
This patch adds a new file which contains a class which will act as a wrapper
for the data to be stored or used during the `hg evolve` command. This patch
just introduces the file and does not use it at the moment. The upcoming patches
will start using it.
# setup config and various utility to test new heads checks on push
. $TESTDIR/testlib/common.sh
cat >> $HGRCPATH <<EOF
[ui]
# simpler log output
logtemplate ="{node|short} ({phase}): {desc}\n"
[phases]
# non publishing server
publish=False
[extensions]
# we need to strip some changeset for some test cases
strip=
evolve=
EOF
setuprepos() {
echo creating basic server and client repo
hg init server
cd server
mkcommit root
hg phase --public .
mkcommit A0
cd ..
hg clone server client
}