Upgrade Gradle to 8.14 in CI Workflows and Gradle Wrapper (#3425)

# Description of Changes

This pull request upgrades the Gradle build system from version 8.12 to
8.14 across the Stirling-PDF project to enhance build stability,
compatibility, and performance. The changes include:

- **What was changed**:
- Updated the Gradle wrapper version in
`gradle/wrapper/gradle-wrapper.properties` from `8.12` to `8.14`.
- Modified the `tasks.wrapper` configuration in `build.gradle` to
specify `gradleVersion = "8.14"`.
- Updated Gradle version references in GitHub Actions workflows
(`multiOSReleases.yml`, `push-docker.yml`, `releaseArtifacts.yml`) from
`8.12` to `8.14` to ensure consistent CI/CD builds.

- **Why the change was made**:
- Gradle 8.14 includes bug fixes, performance improvements, and enhanced
compatibility with newer JDK versions (e.g., Java 17 and 21, as
supported by Stirling-PDF).
- Ensures alignment with the latest Gradle features and security
patches, reducing potential build issues in development and CI/CD
environments.
- Supports the project's recommendation to use newer JDK versions (e.g.,
Java 21) and improves integration with the Foojay Toolchains Plugin.

- **Challenges encountered**:
- Verified compatibility of Gradle 8.14 with existing plugins (e.g.,
`org.springframework.boot`, `org.sonarqube`, `com.diffplug.spotless`) to
ensure no breaking changes.
- Tested CI/CD workflows to confirm that the updated Gradle version does
not introduce failures in build, test, or deployment pipelines.
- Ensured the Gradle wrapper distribution URL is correctly updated to
avoid download issues.


---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

.github/workflows/multiOSReleases.yml

@@ -70,7 +70,7 @@ jobs:
 
       - uses: gradle/actions/setup-gradle@06832c7b30a0129d7fb559bcc6e43d26f6374244 # v4.3.1
         with:
-          gradle-version: 8.12
+          gradle-version: 8.14
 
       - name: Generate jar (With Security=${{ matrix.enable_security }})
         run: ./gradlew clean createExe
@@ -158,7 +158,7 @@ jobs:
 
       - uses: gradle/actions/setup-gradle@06832c7b30a0129d7fb559bcc6e43d26f6374244 # v4.3.1
         with:
-          gradle-version: 8.12
+          gradle-version: 8.14
 
       # Install Windows dependencies
       - name: Install WiX Toolset

.github/workflows/push-docker.yml

@@ -32,7 +32,7 @@ jobs:
 
       - uses: gradle/actions/setup-gradle@06832c7b30a0129d7fb559bcc6e43d26f6374244 # v4.3.1
         with:
-          gradle-version: 8.12
+          gradle-version: 8.14
 
       - name: Run Gradle Command
         run: ./gradlew clean build

.github/workflows/releaseArtifacts.yml

@@ -37,7 +37,7 @@ jobs:
 
       - uses: gradle/actions/setup-gradle@06832c7b30a0129d7fb559bcc6e43d26f6374244 # v4.3.1
         with:
-          gradle-version: 8.12
+          gradle-version: 8.14
 
       - name: Generate jar (With Security=${{ matrix.enable_security }})
         run: ./gradlew clean createExe

build.gradle

@@ -404,7 +404,7 @@ sonar {
 //        rules=['unused-dependency']
 //    }
 tasks.wrapper {
-    gradleVersion = "8.12"
+    gradleVersion = "8.14"
     distributionType = Wrapper.DistributionType.ALL
 }
 //tasks.withType(JavaCompile) {

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -114,7 +114,7 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+CLASSPATH="\\\"\\\""
 
 
 # Determine the Java command to use to start the JVM.
@@ -205,7 +205,7 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.
@@ -213,7 +213,7 @@ DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
-        org.gradle.wrapper.GradleWrapperMain \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
         "$@"
 
 # Stop when "xargs" is not available.

gradlew.bat

@@ -70,11 +70,11 @@ goto fail
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+set CLASSPATH=
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell

settings.gradle

@@ -1 +1,5 @@
+plugins {
+    // Apply the foojay-resolver plugin to allow automatic download of JDKs
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.10.0'
+}
 rootProject.name = 'Stirling-PDF'

testing/test_webpages.sh

@@ -26,7 +26,7 @@ check_webpage() {
   fi
 
   # Check if response contains HTML
-  if ! printf '%s' "$BODY" | grep -q "<!DOCTYPE html>\|<html"; then
+  if ! grep -q "<!DOCTYPE html>\|<html" <<< "$BODY"; then
     echo "FAILED - Response is not HTML - $full_url" >> "$result_file"
     return 1
   fi
@@ -75,13 +75,13 @@ test_all_urls() {
 
     ((total_count++))
     ((url_index++))
-    
+
     # Run the check in background
     test_url "$url" "$base_url" "$tmp_dir" "$url_index" &
-    
+
     # Track the job
     ((active_jobs++))
-    
+
     # If we've reached max_parallel, wait for a job to finish
     if [ $active_jobs -ge $max_parallel ]; then
       wait -n  # Wait for any child process to exit
@@ -97,7 +97,7 @@ test_all_urls() {
     if [ -f "${tmp_dir}/result_${i}.txt" ]; then
       cat "${tmp_dir}/result_${i}.txt"
     fi
-    
+
     if [ -f "${tmp_dir}/failed_${i}" ]; then
       failed_count=$((failed_count + $(cat "${tmp_dir}/failed_${i}")))
     fi
@@ -171,4 +171,4 @@ main() {
 # Run main if script is executed directly
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   main "$@"
-fi
+fi