#!/bin/sh
# Envia o codigo-fonte e o script de teste para dentro de uma VM e executa.
#
# Uso: run_in_vm.sh <dominio>
#      CC=clang run_in_vm.sh rfs-debian    # build no guest com clang
# Requer: guestcmd.py (mesmo diretorio), mkisofs, libvirt, sudo (loop mount).
set -e

DOMAIN=${1:?uso: run_in_vm.sh <dominio>}
HERE=$(cd "$(dirname "$0")" && pwd)
REPO=$(cd "$HERE/../.." && pwd)
WORK=${WORK:-/var/tmp/vmtest}

echo "== empacotando o codigo-fonte =="
tar czf "$WORK/rfs-src.tar.gz" -C "$REPO" \
    --exclude=.git --exclude='*.o' --exclude='*.lo' --exclude='*.la' \
    --exclude='.libs' --exclude=build-aux --exclude=m4 \
    --exclude=autom4te.cache --exclude=config.h --exclude=config.log \
    --exclude=config.status --exclude=libtool \
    --exclude='Makefile' --exclude='Makefile.in' --exclude=configure \
    --exclude=aclocal.m4 --exclude='*.8' --exclude=stamp-h1 \
    --exclude='reiserfscore/reiserfs_err.c' \
    --exclude='reiserfscore/reiserfs_err.h' \
    .

echo "== montando o disco de dados =="
rm -rf /tmp/vmdata.$$ && mkdir -p /tmp/vmdata.$$
sudo mount -o loop "$WORK/data.img" /tmp/vmdata.$$
sudo cp "$WORK/rfs-src.tar.gz" "$HERE/run_tests.sh" /tmp/vmdata.$$
sync
sudo umount /tmp/vmdata.$$ && rmdir /tmp/vmdata.$$

echo "== transferindo para $DOMAIN =="
ATTACH=/tmp/vdb.$$.xml
cat > "$ATTACH" <<EOF
<disk type='file' device='disk'>
  <driver name='qemu' type='raw'/>
  <source file='$WORK/data.img'/>
  <target dev='vdb' bus='virtio'/>
</disk>
EOF
virsh attach-device "$DOMAIN" "$ATTACH" --live >/dev/null 2>&1 || true
rm -f "$ATTACH"

echo "== extraindo e rodando os testes ${CC:+com CC=$CC} =="
"$HERE/guestcmd.py" "$DOMAIN" "
set -e
mkdir -p /mnt/data
# remount forcado: o host trocou o conteudo do disco por baixo do guest
umount /mnt/data 2>/dev/null || true
mount -o ro /dev/vdb /mnt/data
rm -rf /root/rfs
mkdir -p /root/rfs
tar xzf /mnt/data/rfs-src.tar.gz -C /root/rfs
cp /mnt/data/run_tests.sh /root/run_tests.sh
chmod +x /root/run_tests.sh
SRC=/root/rfs ${CC:+CC=$CC }sh /root/run_tests.sh
" 1800