Fix ./gradlew wrapper run issue in GitHub workflow

[Copilot]

Resolves the ClassNotFoundException: org.gradle.wrapper.GradleWrapperMain error that occurred when running ./gradlew commands in GitHub Actions workflows.

Root Cause

The issue was caused by a missing gradle-wrapper.jar file in the gradle/wrapper/ directory. The Gradle wrapper consists of several components:

• gradlew and gradlew.bat scripts ✅ (present)
• gradle/wrapper/gradle-wrapper.properties ✅ (present)
• gradle/wrapper/gradle-wrapper.jar ❌ (missing)

Without the JAR file, the wrapper scripts cannot locate the GradleWrapperMain class needed to bootstrap Gradle.

Changes Made

1. Fixed Gradle Wrapper

• Added the missing gradle-wrapper.jar for Gradle version 8.14.2
• Updated .gitignore to allow gradle-wrapper.jar while still excluding other JAR files

2. Updated GitHub Workflows

Updated all three workflow files to use the Gradle wrapper instead of manually installing Gradle:

Before:

- name: Setup Gradle
  uses: gradle/actions/setup-gradle@v4
  with:
    gradle-version: '8.14.2'

- name: Build with Gradle
  run: gradle build

After:

- name: Build with Gradle
  run: ./gradlew build

3. Java Version Consistency

• Updated workflows to use Java 21 consistently (matching project requirements)
• Removed unnecessary Gradle setup actions since the wrapper handles version management

Verification

$ ./gradlew --version
Gradle 8.14.2

$ ./gradlew build
BUILD SUCCESSFUL in 42s

The wrapper now correctly downloads and uses Gradle 8.14.2 as specified in gradle-wrapper.properties, eliminating the need for manual Gradle setup in CI pipelines.

Fixes #26.

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[hossain-khan]

nice