refactor: ImageType to LlamaStackImageType (#1500)

This disambiguates "Image" term from "container image" alternative usage
and allows for:

```python

if image_type == LlamaStackImagetype.venv:
	...

```

accesses rather than `ImageType.venv.value`

# What does this PR do?
[Provide a short summary of what this PR does and why. Link to relevant
issues if applicable.]

Changes enum use to comply with semantic python styling and naming
conventions.

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]

Refactor was automated and small so simple run-through of creating
images was done.

Signed-off-by: James Kunstle <jkunstle@redhat.com>

llama_stack/cli/stack/_build.py

@@ -39,7 +39,7 @@ from llama_stack.distribution.resolver import InvalidProviderError
 from llama_stack.distribution.utils.config_dirs import DISTRIBS_BASE_DIR
 from llama_stack.distribution.utils.dynamic import instantiate_class_type
 from llama_stack.distribution.utils.exec import formulate_run_args, run_with_pty
-from llama_stack.distribution.utils.image_types import ImageType
+from llama_stack.distribution.utils.image_types import LlamaStackImageType
 from llama_stack.providers.datatypes import Api
 
 TEMPLATES_PATH = Path(__file__).parent.parent.parent / "templates"
@@ -170,7 +170,7 @@ def run_stack_build_command(args: argparse.Namespace) -> None:
                 )
                 sys.exit(1)
 
-        if build_config.image_type == ImageType.container.value and not args.image_name:
+        if build_config.image_type == LlamaStackImageType.CONTAINER.value and not args.image_name:
             cprint(
                 "Please specify --image-name when building a container from a config file",
                 color="red",
@@ -226,7 +226,7 @@ def _generate_run_config(
     """
     apis = list(build_config.distribution_spec.providers.keys())
     run_config = StackRunConfig(
-        container_image=(image_name if build_config.image_type == ImageType.container.value else None),
+        container_image=(image_name if build_config.image_type == LlamaStackImageType.CONTAINER.value else None),
         image_name=image_name,
         apis=apis,
         providers={},
@@ -279,16 +279,16 @@ def _run_stack_build_command_from_build_config(
     template_name: Optional[str] = None,
     config_path: Optional[str] = None,
 ) -> str:
-    if build_config.image_type == ImageType.container.value:
+    if build_config.image_type == LlamaStackImageType.CONTAINER.value:
         if template_name:
             image_name = f"distribution-{template_name}"
         else:
             if not image_name:
                 raise ValueError("Please specify an image name when building a container image without a template")
-    elif build_config.image_type == ImageType.conda.value:
+    elif build_config.image_type == LlamaStackImageType.CONDA.value:
         if not image_name:
             raise ValueError("Please specify an image name when building a conda image")
-    elif build_config.image_type == ImageType.venv.value:
+    elif build_config.image_type == LlamaStackImageType.VENV.value:
         if not image_name and os.environ.get("UV_SYSTEM_PYTHON"):
             image_name = "__system__"
         if not image_name:

llama_stack/distribution/build.py

@@ -16,7 +16,7 @@ from termcolor import cprint
 from llama_stack.distribution.datatypes import BuildConfig, Provider
 from llama_stack.distribution.distribution import get_provider_registry
 from llama_stack.distribution.utils.exec import run_command, run_with_pty
-from llama_stack.distribution.utils.image_types import ImageType
+from llama_stack.distribution.utils.image_types import LlamaStackImageType
 from llama_stack.providers.datatypes import Api
 
 log = logging.getLogger(__name__)
@@ -95,7 +95,7 @@ def build_image(
     normal_deps, special_deps = get_provider_dependencies(build_config.distribution_spec.providers)
     normal_deps += SERVER_DEPENDENCIES
 
-    if build_config.image_type == ImageType.container.value:
+    if build_config.image_type == LlamaStackImageType.CONTAINER.value:
         script = str(importlib.resources.files("llama_stack") / "distribution/build_container.sh")
         args = [
             script,
@@ -104,7 +104,7 @@ def build_image(
             container_base,
             " ".join(normal_deps),
         ]
-    elif build_config.image_type == ImageType.conda.value:
+    elif build_config.image_type == LlamaStackImageType.CONDA.value:
         script = str(importlib.resources.files("llama_stack") / "distribution/build_conda_env.sh")
         args = [
             script,
@@ -112,7 +112,7 @@ def build_image(
             str(build_file_path),
             " ".join(normal_deps),
         ]
-    elif build_config.image_type == ImageType.venv.value:
+    elif build_config.image_type == LlamaStackImageType.VENV.value:
         script = str(importlib.resources.files("llama_stack") / "distribution/build_venv.sh")
         args = [
             script,

llama_stack/distribution/utils/exec.py

@@ -20,14 +20,14 @@ import importlib
 import json
 from pathlib import Path
 
-from llama_stack.distribution.utils.image_types import ImageType
+from llama_stack.distribution.utils.image_types import LlamaStackImageType
 
 
 def formulate_run_args(image_type, image_name, config, template_name) -> list:
     env_name = ""
-    if image_type == ImageType.container.value or config.container_image:
+    if image_type == LlamaStackImageType.CONTAINER.value or config.container_image:
         env_name = f"distribution-{template_name}" if template_name else config.container_image
-    elif image_type == ImageType.conda.value:
+    elif image_type == LlamaStackImageType.CONDA.value:
         current_conda_env = os.environ.get("CONDA_DEFAULT_ENV")
         env_name = image_name or current_conda_env
         if not env_name:

llama_stack/distribution/utils/image_types.py

@@ -4,10 +4,10 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from enum import Enum
+import enum
 
 
-class ImageType(Enum):
-    container = "container"
-    conda = "conda"
-    venv = "venv"
+class LlamaStackImageType(enum.Enum):
+    CONTAINER = "container"
+    CONDA = "conda"
+    VENV = "venv"