configure.py can configure caption strategy

configure.py

@@ -789,6 +789,26 @@ def configure_env():
         "Enter the path to your dataset. This should be a directory containing images and text files for their caption. For reliability, use an absolute (full) path, beginning with a '/'",
         "/datasets/my-dataset",
     )
+    dataset_caption_strategy = prompt_user(
+        (
+            "How should the dataloader handle captions?"
+            "\n-> 'filename' will use the names of your image files as the caption"
+            "\n-> 'textfile' requires a image.txt file to go next to your image.png file"
+            "\n-> 'instanceprompt' will just use one trigger phrase for all images"
+            "\n"
+            "\n(Options: filename, textfile, instanceprompt)"
+        ),
+        "textfile",
+    )
+    if dataset_caption_strategy not in ["filename", "textfile", "instanceprompt"]:
+        print(f"Invalid caption strategy: {dataset_caption_strategy}")
+        dataset_caption_strategy = "textfile"
+    dataset_instance_prompt = None
+    if "instanceprompt" in dataset_caption_strategy:
+        dataset_instance_prompt = prompt_user(
+            "Enter the instance_prompt you want to use for all images in this dataset",
+            "CatchPhrase",
+        )
     dataset_repeats = int(
         prompt_user(
             "How many times do you want to repeat each image in the dataset?", 10
@@ -818,6 +838,9 @@ def configure_env():
             dataset["maximum_image_size"] = dataset["resolution"]
             dataset["target_downsample_size"] = dataset["resolution"]
         dataset["id"] = dataset["id"].replace("PLACEHOLDER", dataset_id)
+        if dataset_instance_prompt:
+            dataset["instance_prompt"] = dataset_instance_prompt
+        dataset["caption_strategy"] = dataset_caption_strategy
 
     print("Dataloader configuration:")
     print(default_local_configuration)