Fix pretrained models not being found on dbfs systems (#14438)

Author: DevinTDHa

src/main/scala/com/johnsnowlabs/ml/gguf/GGUFWrapper.scala

@@ -16,6 +16,8 @@
 package com.johnsnowlabs.ml.gguf
 
 import com.johnsnowlabs.nlp.llama.{LlamaModel, ModelParameters}
+import com.johnsnowlabs.nlp.util.io.ResourceHelper
+import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.spark.SparkFiles
 import org.apache.spark.sql.SparkSession
 import org.slf4j.{Logger, LoggerFactory}
@@ -72,7 +74,7 @@ object GGUFWrapper {
   // TODO: make sure this.synchronized is needed or it's not a bottleneck
   private def withSafeGGUFModelLoader(modelParameters: ModelParameters): LlamaModel =
     this.synchronized {
-      new LlamaModel(modelParameters) // TODO: Model parameters
+      new LlamaModel(modelParameters)
     }
 
   def read(sparkSession: SparkSession, modelPath: String): GGUFWrapper = {
@@ -89,4 +91,31 @@ object GGUFWrapper {
 
     new GGUFWrapper(modelFile.getName, modelFile.getParent)
   }
+
+  def readModel(modelFolderPath: String, spark: SparkSession): GGUFWrapper = {
+    def findGGUFModelInFolder(folderPath: String): String = {
+      val folder = new File(folderPath)
+      if (folder.exists && folder.isDirectory) {
+        val ggufFile: String = folder.listFiles
+          .filter(_.isFile)
+          .filter(_.getName.endsWith(".gguf"))
+          .map(_.getAbsolutePath)
+          .headOption // Should only be one file
+          .getOrElse(
+            throw new IllegalArgumentException(s"Could not find GGUF model in $folderPath"))
+
+        new File(ggufFile).getAbsolutePath
+      } else {
+        throw new IllegalArgumentException(s"Path $folderPath is not a directory")
+      }
+    }
+
+    val uri = new java.net.URI(modelFolderPath.replaceAllLiterally("\\", "/"))
+    // In case the path belongs to a different file system but doesn't have the scheme prepended (e.g. dbfs)
+    val fileSystem: FileSystem = FileSystem.get(uri, spark.sparkContext.hadoopConfiguration)
+    val actualFolderPath = fileSystem.resolvePath(new Path(modelFolderPath)).toString
+    val localFolder = ResourceHelper.copyToLocal(actualFolderPath)
+    val modelFile = findGGUFModelInFolder(localFolder)
+    read(spark, modelFile)
+  }
 }

src/main/scala/com/johnsnowlabs/nlp/annotators/seq2seq/AutoGGUFModel.scala

@@ -235,25 +235,8 @@ trait ReadAutoGGUFModel {
   this: ParamsAndFeaturesReadable[AutoGGUFModel] =>
 
   def readModel(instance: AutoGGUFModel, path: String, spark: SparkSession): Unit = {
-    def findGGUFModelInFolder(): String = {
-      val folder =
-        new java.io.File(
-          path.replace("file:", "")
-        ) // File should be local at this point. TODO: Except if its HDFS?
-      if (folder.exists && folder.isDirectory) {
-        folder.listFiles
-          .filter(_.isFile)
-          .filter(_.getName.endsWith(".gguf"))
-          .map(_.getAbsolutePath)
-          .headOption // Should only be one file
-          .getOrElse(throw new IllegalArgumentException(s"Could not find GGUF model in $path"))
-      } else {
-        throw new IllegalArgumentException(s"Path $path is not a directory")
-      }
-    }
-
-    val model = AutoGGUFModel.loadSavedModel(findGGUFModelInFolder(), spark)
-    instance.setModelIfNotSet(spark, model.getModelIfNotSet)
+    val model: GGUFWrapper = GGUFWrapper.readModel(path, spark)
+    instance.setModelIfNotSet(spark, model)
   }
 
   addReader(readModel)