tests/test-pull-http

update: add comments and test cases for updating across branches

Add comment to merge.py:update() showing various cases of 'hg update': to a
descendant, crossing named branches, and crossing branches within a named
branch; with no option, -c or -C; with or without uncommitted changes; and
with or without a specific revision. Add tests for all of these cases.

#!/bin/sh

cp "$TESTDIR"/printenv.py .

hg init test
cd test
echo a > a
hg ci -Ama

cd ..
hg clone test test2
cd test2
echo a >> a
hg ci -mb

echo % expect error, cloning not allowed
echo '[web]' > .hg/hgrc
echo 'allowpull = false' >> .hg/hgrc
hg serve -p $HGPORT -d --pid-file=hg.pid -E errors.log
cat hg.pid >> $DAEMON_PIDS
hg clone http://localhost:$HGPORT/ test3 | sed -e 's,:[0-9][0-9]*/,/,'
"$TESTDIR/killdaemons.py"
echo % serve errors
cat errors.log

req() {
	hg serve -p $HGPORT -d --pid-file=hg.pid -E errors.log
	cat hg.pid >> $DAEMON_PIDS
	hg --cwd ../test pull http://localhost:$HGPORT/ | sed -e 's,:[0-9][0-9]*/,/,'
	kill `cat hg.pid`
	echo % serve errors
	cat errors.log
}

echo % expect error, pulling not allowed
req