add env command

rvc/cli/utils/env.py

@@ -1,13 +1,40 @@
 """
 setup or cleanup enviroment file
-usage: rvc env [set / cleanup]
+usage: rvc env [create / cleanup]
 Default: [nowDir/.env]
 
 """
 
+import os
+
 import click
 
 
-@click.command()
+@click.group()
 def env():
     pass
+
+
+@env.command()
+def create():
+    env_file_path = os.path.join(os.getcwd(), ".env")
+
+    if not os.path.exists(env_file_path):
+        default_values = {
+            "weight_root": "",
+            "weight_uvr5_root": "",
+            "index_root": "",
+            "rmvpe_root": "",
+            "hubert_path": "",
+            "save_uvr_path": "",
+            "TEMP": "",
+            "pretrained": "",
+        }
+
+        with open(env_file_path, "w") as env_file:
+            for key, value in default_values.items():
+                env_file.write(f"{key}={value}\n")
+
+        click.echo(f"{env_file_path} created successfully.")
+    else:
+        click.echo(f"{env_file_path} already exists, no change")