Refine dev readme and add default invoke

DEV_README.md

@@ -7,19 +7,21 @@ This guide provides an overview of how to develop in this repository.
 
 1. Clone the repo
 
-2. Install requirements
+2. Install the package to local
 
-   `pip install -r requirements.txt`
+  `pip install -e .`
 
-3. Add commands or modify existing commands
+3. Test script running
 
-4. Test package:
+  `comfy --help`
+
+4. Add more commands (follow the [Add New Command](#add-new-command) guide)
 
    pip install .
 
 ## Add New Command
 
-- Register it under `comfy/comfy.py` 
+- Register it under `comfy/cmdline.py` 
 
 If it's contains subcommand, create folder under comfy/command/[new_command] and
 add the following boilerplate

comfy/cmdline.py

@@ -1,6 +1,7 @@
 import typer
 from typing_extensions import Annotated
 from comfy.command.models import models
+from rich import print
 
 
 from comfy.command import custom_nodes
@@ -9,9 +10,14 @@
 from comfy import constants
 from comfy.env_checker import EnvChecker
 
-
 app = typer.Typer()
 
+@app.callback(invoke_without_command=True)
+def no_command(ctx: typer.Context):
+    if ctx.invoked_subcommand is None:
+        print(ctx.get_help())
+        ctx.exit()
+
 @app.command(help="Download and install ComfyUI")
 def install(
     url: str = constants.COMFY_GITHUB_URL,
@@ -32,4 +38,4 @@ def env():
     env_checker.print()
 
 app.add_typer(models.app, name="models", help="Manage models.")
-app.add_typer(custom_nodes.app, name="custom_nodes", help="Manage custom nodes.")
+app.add_typer(custom_nodes.app, name="nodes", help="Manage custom nodes.")

comfy/command/custom_nodes/command.py

@@ -5,11 +5,11 @@
 # TODO(dr.lt.data): Add support for custom nodes managements
 @app.command()
 def add(name: str):
-  """Add a new custom node"""
-  print(f"Adding a new custom node: {name}")
+    """Add a new custom node"""
+    print(f"Adding a new custom node: {name}")
 
 
 @app.command()
 def remove(name: str):
-  """Remove a custom node"""
-  print(f"Removing a custom node: {name}")
+    """Remove a custom node"""
+    print(f"Removing a custom node: {name}")