feat(GradleInspector): Add custom JDK download capability

Firewalled environments can't rely on open internet access, leading to
invalid request to external Foojay Disco service.
Adding customJdkUrl to enable the capability of direct download of an
specified JDK.

Signed-off-by: Helio Chissini de Castro <[email protected]>

Author: heliocastro

plugins/package-managers/gradle-inspector/src/main/kotlin/GradleInspector.kt

@@ -93,7 +93,12 @@ data class GradleInspectorConfig(
      * The directory of the Java home to use when analyzing projects. By default, the same Java home as for ORT itself
      * is used.
      */
-    val javaHome: String?
+    val javaHome: String?,
+
+    /**
+     * Custom JDK URL for direct download instead of the Disco service. It is valid if the javaVersion is set together.
+     */
+    val customJdkUrl: String?
 )
 
 /**
@@ -160,16 +165,25 @@ class GradleInspector(
                         addProgressListener(ProgressListener { logger.debug(it.displayName) })
                     }
 
-                    val javaHome = config.javaVersion
-                        ?.takeUnless { JavaBootstrapper.isRunningOnJdk(it) }
-                        ?.let {
-                            JavaBootstrapper.installJdk("TEMURIN", it).onFailure { e ->
+                    val javaHome = config.customJdkUrl
+                        ?.let { url ->
+                            JavaBootstrapper.downloadJdk(url).onFailure { e ->
                                 issues += createAndLogIssue(e.collectMessages())
                             }.getOrNull()
-                        } ?: config.javaHome?.let { File(it) }
+                        }
+
+                        ?: config.javaVersion
+                            ?.takeUnless { JavaBootstrapper.isRunningOnJdk(it) }
+                            ?.let { version ->
+                                JavaBootstrapper.installJdk("TEMURIN", version).onFailure { e ->
+                                    issues += createAndLogIssue(e.collectMessages())
+                                }.getOrNull()
+                            }
+
+                        ?: config.javaHome?.let { File(it) }
 
                     javaHome?.also {
-                        logger.info { "Setting Java home for project analysis to '$it'." }
+                        logger.info { "Setting Java home for project analysis to '$it'. " }
                         setJavaHome(it)
                     }
                 }