evolve: add an `--update` flag to `hg evolve` command
This patch adds a new `--update` flag which defaults to True. The update flag
updates the working directory to the head of evolved revisions after `hg evolve`
command.
This flag can be used to not update your working directory after `hg evolve`
which has been one of the biggest feature request from fig team at Google. To
not update your working directory, the user can do `hg evolve --no-update`.
If the working directory get obsoleted by evolve command, it will update to the
successor.
This patch also adds some basic tests for the flag introduced.
# 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
}