Have apply-error-prone-suggestions.sh iterate until fix-point (#1983)

By applying the patch operation until no more changes are made, the 
script behaves more intuitively, and Reviewdog PR suggestions will be
more comprehensive.

Author: Stephan202

apply-error-prone-suggestions.sh

@@ -15,12 +15,31 @@ fi
 
 patchChecks=${1:-}
 
-mvn clean test-compile fmt:format \
-  -s "$(dirname "${0}")/settings.xml" \
-  -T 1.0C \
-  -Perror-prone \
-  -Perror-prone-fork \
-  -Ppatch \
-  -Pself-check \
-  -Derror-prone.patch-checks="${patchChecks}" \
-  -Dverification.skip
+# Use mvnd if installed.
+mvn='mvn -T 1.0C'
+if command -v mvnd >/dev/null 2>&1; then
+  mvn='mvnd'
+fi
+
+function patch() {
+  local current_diff="${1}"
+
+  ${mvn} clean test-compile fmt:format \
+    -s "$(dirname "${0}")/settings.xml" \
+    -T 1.0C \
+    -Perror-prone \
+    -Perror-prone-fork \
+    -Ppatch \
+    -Pself-check \
+    -Derror-prone.patch-checks="${patchChecks}" \
+    -Dverification.skip
+
+  local new_diff
+  new_diff="$(git diff)"
+
+  if [ "${current_diff}" != "${new_diff}" ]; then
+    patch "${new_diff}"
+  fi
+}
+
+patch "$(git diff)"