refactor(build): centralize security disable condition in shared Gradle property (#4209)

# Description of Changes

- Introduced `ext.isSecurityDisabled` closure in root `build.gradle` to
consolidate logic for determining if security features should be
disabled.
- Removed duplicated conditional checks from `sourceSets` configurations
in both root and `app/core` `build.gradle` files.
- Updated dependency inclusion for `:proprietary` module to use the new
`isSecurityDisabled()` method for clarity and maintainability.
- Simplified build logic by reducing repeated environment and property
checks.

This change improves maintainability by ensuring that the security
disable condition is defined in one place, reducing the risk of
inconsistencies across modules.

---

## 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/devGuide/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/devGuide/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/devGuide/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)

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

app/core/build.gradle

@@ -114,11 +114,6 @@ sourceSets {
     }
     test {
         java {
-            if (System.getenv('DOCKER_ENABLE_SECURITY') == 'false' || System.getenv('DISABLE_ADDITIONAL_FEATURES') == 'true'
-                || (project.hasProperty('DISABLE_ADDITIONAL_FEATURES')
-                && System.getProperty('DISABLE_ADDITIONAL_FEATURES') == 'true')) {
-                exclude 'stirling/software/proprietary/security/**'
-            }
             if (System.getenv('STIRLING_PDF_DESKTOP_UI') == 'false') {
                 exclude 'stirling/software/SPDF/UI/impl/**'
             }

build.gradle

@@ -34,6 +34,13 @@ ext {
     tempJrePath = null
 }
 
+ext.isSecurityDisabled = { ->
+    System.getenv('DOCKER_ENABLE_SECURITY') == 'false' ||
+    System.getenv('DISABLE_ADDITIONAL_FEATURES') == 'true' ||
+    (project.hasProperty('DISABLE_ADDITIONAL_FEATURES') &&
+     System.getProperty('DISABLE_ADDITIONAL_FEATURES') == 'true')
+}
+
 jar {
     enabled = false
     manifest {
@@ -222,37 +229,6 @@ licenseReport {
     outputDir = project.layout.buildDirectory.dir("reports/dependency-license").get().asFile.path
 }
 
-sourceSets {
-    main {
-        java {
-            if (System.getenv('DOCKER_ENABLE_SECURITY') == 'false' || System.getenv('DISABLE_ADDITIONAL_FEATURES') == 'true'
-                || (project.hasProperty('DISABLE_ADDITIONAL_FEATURES')
-                && System.getProperty('DISABLE_ADDITIONAL_FEATURES') == 'true')) {
-                exclude 'stirling/software/proprietary/security/**'
-            }
-
-            if (System.getenv('STIRLING_PDF_DESKTOP_UI') == 'false') {
-                exclude 'stirling/software/SPDF/UI/impl/**'
-            }
-
-        }
-    }
-
-    test {
-        java {
-            if (System.getenv('DOCKER_ENABLE_SECURITY') == 'false' || System.getenv('DISABLE_ADDITIONAL_FEATURES') == 'true'
-                || (project.hasProperty('DISABLE_ADDITIONAL_FEATURES')
-                && System.getProperty('DISABLE_ADDITIONAL_FEATURES') == 'true')) {
-                exclude 'stirling/software/proprietary/security/**'
-            }
-
-            if (System.getenv('STIRLING_PDF_DESKTOP_UI') == 'false') {
-                exclude 'stirling/software/SPDF/UI/impl/**'
-            }
-        }
-    }
-}
-
 // Configure the forked spring boot run task to properly delegate to the stirling-pdf module
 tasks.named('forkedSpringBootRun') {
     dependsOn ':stirling-pdf:bootRun'
@@ -575,9 +551,7 @@ swaggerhubUpload {
 dependencies {
     implementation project(':stirling-pdf')
     implementation project(':common')
-    if (System.getenv('DISABLE_ADDITIONAL_FEATURES') != 'true'
-        || (project.hasProperty('DISABLE_ADDITIONAL_FEATURES')
-        && System.getProperty('DISABLE_ADDITIONAL_FEATURES') != 'true')) {
+    if (rootProject.ext.isSecurityDisabled()) {
         implementation project(':proprietary')
     }
 
@@ -592,7 +566,6 @@ tasks.named("test") {
     useJUnitPlatform()
 }
 
-
 // Make sure all relevant processes depend on writeVersion
 processResources.dependsOn(writeVersion)