replace usage of os.popen() with util.popen()
To make this possible, I added a mode parameter to both implementations of
util.popen(), defaulting to 'r' (as it does in the Python stdlib).
#! /bin/sh
echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
mkdir webdir
cd webdir
hg init a
hg --cwd a qinit -c
echo a > a/a
hg --cwd a ci -A -m a
echo b > a/b
hg --cwd a addremove
hg --cwd a qnew -f b.patch
hg --cwd a qcommit -m b.patch
hg --cwd a log --template "{desc}\n"
hg --cwd a/.hg/patches log --template "{desc}\n"
root=`pwd`
cd ..
cat > collections.conf <<EOF
[collections]
$root=$root
EOF
hg serve -p $HGPORT -d --pid-file=hg.pid --webdir-conf collections.conf \
-A access-paths.log -E error-paths-1.log
cat hg.pid >> $DAEMON_PIDS
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/?style=raw'
hg qclone http://localhost:$HGPORT/a b
hg --cwd b log --template "{desc}\n"
hg --cwd b qpush -a
hg --cwd b log --template "{desc}\n"