ID="$1"
NAMESPACE="$2"
PROJECT="$3"
COMMIT="$4"
TAG="$5"

: "${PIGEON_GITLAB_TOKEN:?}"
: "${PIGEON_PROJECTS:?}"

DIRECTORY="$(mktemp -d /tmp/pigeon.XXXXXXXXXX)"
trap 'rm -rf "$DIRECTORY"' EXIT
cd "$DIRECTORY"

git -c advice.detachedHead=false clone -q --rev "$COMMIT" --depth 1 \
  "https://oauth2:$PIGEON_GITLAB_TOKEN@gitlab.com/$NAMESPACE/$PROJECT.git" student/
rm -rf student/.git

mkdir -p project/tests project/build
cp -a "$PIGEON_PROJECTS/$PROJECT"/tests/*.sh project/tests/
cp -a "$PIGEON_PROJECTS/$PROJECT"/build/. project/build/

mkfs.ext4 -q -F -d student student.img 16M
mkfs.ext4 -q -F -d project project.img 16M
mkfs.ext4 -q -F results.img 16M

cat >vm.json <<'EOF'
{
  "boot-source": {
    "kernel_image_path": "@kernel@",
    "boot_args": "reboot=k panic=1 init=/init quiet nomodule i8042.noaux i8042.nomux i8042.dumbkbd swiotlb=noforce console=ttyS0"
  },
  "drives": [
    { "drive_id": "rootfs",  "path_on_host": "@rootfs@",    "is_root_device": true,  "is_read_only": true },
    { "drive_id": "student", "path_on_host": "student.img", "is_root_device": false, "is_read_only": true },
    { "drive_id": "project", "path_on_host": "project.img", "is_root_device": false, "is_read_only": true },
    { "drive_id": "results", "path_on_host": "results.img", "is_root_device": false, "is_read_only": false }
  ],
  "machine-config": { "vcpu_count": 1, "mem_size_mib": 512 }
}
EOF

firecracker --no-api --level Error --config-file vm.json

RESULT=""
TESTS="$PIGEON_PROJECTS/$PROJECT/tests"
for TEST in "$TESTS"/*.sh ; do
  debugfs -R "cat /$(basename "$TEST" .sh)" results.img >scratch 2>/dev/null
  if cmp scratch "$TESTS/$(basename "$TEST" .sh).expected" ; then
    RESULT="${RESULT}PASS\n"
  else
    RESULT="${RESULT}FAIL: $(cat "$TESTS/$(basename "$TEST" .sh).hint")\n"
  fi
done

curl -s --show-error --out-null --request PUT \
  --header "PRIVATE-TOKEN: $PIGEON_GITLAB_TOKEN" \
  --header 'Content-Type: application/json' \
  --data "{\"description\": \"$RESULT\"}" \
  --url "https://gitlab.com/api/v4/projects/$ID/releases/$TAG"