feat(evaluator): Allow to evaluate license sources together

While it is valuable to be able to evaluate the license rule seperately
per license source, some users do desire to evaluate only once per
license for all sources. Introduce a toggle, which allows for that
while keeping the old behavior as default.

Signed-off-by: Frank Viernau <frank.viernau@gmail.com>

Author: fviernau

evaluator/src/main/kotlin/PackageRule.kt

@@ -202,14 +202,25 @@ open class PackageRule(
     /**
      * A DSL function to configure a [LicenseRule] and add it to this rule.
      */
-    fun licenseRule(name: String, licenseView: LicenseView, block: LicenseRule.() -> Unit) {
-        resolvedLicenseInfo.filter(licenseView, filterSources = true)
+    fun licenseRule(
+        name: String,
+        licenseView: LicenseView,
+        separateEvaluationPerSource: Boolean = true,
+        block: LicenseRule.() -> Unit
+    ) {
+        val effectiveResolvedLicenseInfo = resolvedLicenseInfo.filter(licenseView, filterSources = true)
             .applyChoices(ruleSet.ortResult.getPackageLicenseChoices(pkg.metadata.id), licenseView)
-            .applyChoices(ruleSet.ortResult.getRepositoryLicenseChoices(), licenseView).forEach { resolvedLicense ->
+            .applyChoices(ruleSet.ortResult.getRepositoryLicenseChoices(), licenseView)
+
+        effectiveResolvedLicenseInfo.forEach { resolvedLicense ->
+            if (separateEvaluationPerSource) {
                 resolvedLicense.sources.forEach { licenseSource ->
                     licenseRules += LicenseRule(name, resolvedLicense, setOf(licenseSource)).apply(block)
                 }
+            } else {
+                licenseRules += LicenseRule(name, resolvedLicense, resolvedLicense.sources).apply(block)
             }
+        }
     }
 
     fun issue(severity: Severity, message: String, howToFix: String) =

evaluator/src/main/kotlin/Rule.kt

@@ -123,7 +123,7 @@ abstract class Rule(
 
     /**
      * Add an issue of the given [severity] for [pkgId] to the list of violations. Optionally, the offending [license]
-     * and its [source][licenseSource] can be specified. The [message] further explains the violation itself and
+     * and its [sources][licenseSources] can be specified. The [message] further explains the violation itself and
      * [howToFix] explains how it can be fixed.
      */
     fun issue(