+IGNORE_ROOT_ARG="--ignore-root-warning"
+IGNORE_ROOT=0
+
+while :; do
+ case $1 in
+ $IGNORE_ROOT_ARG) IGNORE_ROOT=1
+ ;;
+ *[a-zA-Z]) ENV=$1
+ ;;
+ *) break
+ ;;
+ esac
+ shift
+done
+
+# Abort running this script if root
+if [ "$IGNORE_ROOT" -eq 0 ] && [ "$EUID" == "0" ]; then
+ echo "Do not run this script as root!" >&2
+ echo "Use $IGNORE_ROOT_ARG to ignore this error." >&2
+ exit 1
+fi
+
+set -e
+set -u
+
+COMPOSER_COMMAND='composer'
+REQUIRE_FILE='scripts/require.sh'
+
+if [ ! -f "$REQUIRE_FILE" ]; then
+ echo "Cannot find $REQUIRE_FILE"
+ exit 1
+fi
+
+. "$REQUIRE_FILE"
+
+# Check for wallabag .git folder
+if [ ! -d .git ]; then
+ echo "Can not update because wallabag wasn't installed using git (see https://doc.wallabag.org/en/admin/upgrade.html#upgrade-on-a-shared-hosting). Aborting.";
+ exit 2;
+fi