Why the minimal barebone authenticator provider won't compile? #43231

Nefcanto · 2025-10-07T06:41:15Z

Nefcanto
Oct 7, 2025

I want to create the minimal authenticator. Using three AI chatbots (ChatGPT, Grok and Gemini) I realized that I need this file-system structure:

./pom.xml
./Build
./src
./src/main
./src/main/resources
./src/main/resources/META-INF
./src/main/resources/META-INF/services
./src/main/resources/META-INF/services/org.keycloak.authentication.AuthenticatorFactory
./src/main/java
./src/main/java/phone_otp
./src/main/java/phone_otp/AuthFactory.java
./src/main/java/phone_otp/Auth.java

The Build is a script that can be run like ./Build:

docker run --rm \
  -v "$HOME/.m2":/root/.m2 \
  -v "$(pwd)":/app \
  -w /app \
  maven:3.9.9-eclipse-temurin-17 \
  mvn -B clean package -DskipTests

This is the repo I made:

https://github.com/holismholding/phoneotp

It does not compile no matter what I do. I constantly change the Java code and the pom content as AI tells me. But no version compiles.

P.S. This repo had dozens of commits, but for the sake of simplicity, I removed its history. It's now only having one single commit.

danielFesenmeyer · 2025-10-08T09:18:11Z

danielFesenmeyer
Oct 8, 2025

Maybe someone can help, when you share the actual error message. It's difficult to guess otherwise.

2 replies

Nefcanto Oct 8, 2025
Author

The reason I sent the repo's link was to build it. The error messages constantly change based on the loop between AI and changes made to the Java classes or pom file.

The most important error was this:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:compile (default-compile) on project phone-otp-provider: Compilation failure: Compilation failure: [ERROR] /app/src/main/java/phone_otp/AuthFactory.java:[9,29] cannot find symbol [ERROR] symbol: class Config [ERROR] location: package org.keycloak.provider [ERROR] /app/src/main/java/phone_otp/AuthFactory.java:[56,28] package Config does not exist

Nefcanto Oct 8, 2025
Author

@danielFesenmeyer, at last, I was able to build it. It took hours. Though I'm not sure if the skeleton is correct or not.

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Oct 7, 2025

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Oct 8, 2025

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