fix(crossplatfor-support)

Author: Vacxe

danger-kotlin-kts/src/main/kotlin/systems/danger/kts/DangerFileScriptDefinition.kt

@@ -63,12 +63,17 @@ object DangerFileScriptDefinition : ScriptCompilationConfiguration(
 )
 
 class DangerFileKtsConfigurator : RefineScriptCompilationConfigurationHandler {
-
-    private val resolver = CompoundDependenciesResolver(
-        FileSystemDependenciesResolver(DANGER_LIBS_FLAT_DIR),
-        FileSystemDependenciesResolver(),
+    private val externalDependenciesResolvers = setOf(
         MavenDependenciesResolver()
     )
+    private val resolvers = DANGER_DEFAULT_FLAT_DIRS
+        .map { File(it) }
+        .filter { it.exists() }
+        .map { FileSystemDependenciesResolver(it) } +
+            FileSystemDependenciesResolver() +
+            externalDependenciesResolvers
+
+    private val resolver = CompoundDependenciesResolver(resolvers)
 
     override operator fun invoke(context: ScriptConfigurationRefinementContext): ResultWithDiagnostics<ScriptCompilationConfiguration> =
         processAnnotations(context)
@@ -136,7 +141,13 @@ class DangerFileKtsConfigurator : RefineScriptCompilationConfigurationHandler {
     }
 
     private companion object {
-        const val DANGER_DEFAULT_FLAT_DIR = "/usr/local/lib/danger/libs"
-        private val DANGER_LIBS_FLAT_DIR = File(DANGER_DEFAULT_FLAT_DIR)
+        val DANGER_DEFAULT_FLAT_DIRS = setOf(
+            "/usr/local", // x86 location
+            "/opt/local", // Arm
+            "/opt/homebrew", // Homebrew Arm
+            "/usr", // Fallback
+        ).map {
+            "$it/lib/danger/libs"
+        }
     }
-}
+}

danger-kotlin/src/runnerMain/kotlin/systems.danger/cmd/dangerfile/DangerFile.kt

@@ -8,8 +8,24 @@ import systems.danger.Log
 object DangerFile : DangerFileBridge {
     private const val DANGERFILE_EXTENSION = ".df.kts"
     private const val DANGERFILE = "Dangerfile$DANGERFILE_EXTENSION"
+    private val platformExpectedLibLocations = setOf(
+        "/usr/local", // x86 location
+        "/opt/local", // Arm
+        "/opt/homebrew", // Homebrew Arm
+        "/usr", // Fallback
+    )
 
     override fun execute(inputJson: String, outputJson: String) {
+        val dangerKotlinJarPath = platformExpectedLibLocations
+            .map { "$it/lib/danger/danger-kotlin.jar" }
+            .filter { access(it, F_OK) == 0 }
+            .also {
+                if (it.isEmpty()) {
+                    Log.error("lib/danger/danger-kotlin.jar not found in following location ${libLocations.joinToString()}")
+                    exit(1)
+                }
+            }.first()
+
         val dangerfile = dangerfileParameter(inputJson) ?: DANGERFILE
 
         if (!dangerfile.endsWith(DANGERFILE_EXTENSION)) {
@@ -23,7 +39,7 @@ object DangerFile : DangerFileBridge {
             "-script-templates",
             "systems.danger.kts.DangerFileScript",
             "-cp",
-            "/usr/local/lib/danger/danger-kotlin.jar",
+            dangerKotlinJarPath,
             "-script",
             dangerfile,
             inputJson,