update.sh: Update and run as directory owner

update.sh

@@ -6,6 +6,16 @@ if [ $# -eq 1 ]; then
     cd "$1";
 fi
 
+user=$(stat -c '%U' .);
+
+r() {
+    sudo -u "$user" $@;
+}
+
+git() {
+    r git $@;
+}
+
 PREFIX=release;
 CONF_SCRIPT="configure.sh";
 
@@ -14,7 +24,7 @@ TAG=$(git tag --list | grep "^$PREFIX-" | sort -r | head -n 1);
 if git verify-tag --raw "$TAG" 2>&1 | grep "TRUST_ULTIMATE" > /dev/null; then
     git checkout -q "$TAG";
     if [ -f "$CONF_SCRIPT" ]; then
-        ./$CONF_SCRIPT;
+        r ./$CONF_SCRIPT;
     fi
 else
     echo "Invalid or missing signature for $TAG" >&2;