Fix/fix shell detection

oks_cli/main.py

@@ -82,7 +82,7 @@ def version():
     print(importlib.metadata.version(__package__))
 
 @cli.command("install-completion", help="Install shell completion scripts.")
-@click.option('--type', required=True, help="Shell, supported [bash,zsh]")
+@click.option('--type', help="Shell, supported [bash,zsh]")
 def install_completion(type):
     """Install shell completion scripts for the CLI."""
     install_completions(type)

oks_cli/utils.py

@@ -801,6 +801,17 @@ def find_shell_profile(home, shell_type):
 def install_completions(shell_type):
     """Install shell completion scripts for bash or zsh."""
     home = os.path.expanduser('~')
+
+    if shell_type is None:
+        try:
+            shell_pid = os.getppid()
+            result = subprocess.run(['ps', '-p', str(shell_pid), '-o', 'comm='], capture_output=True, text=True)
+            shell_name = result.stdout.strip()
+
+            shell_type = os.path.basename(shell_name).lstrip('-')
+        except subprocess.SubProcessError:
+            click.echo("Failed to determine shell type, please specify it by --type")
+
     completion_dir = os.path.join(home, ".oks_cli", "completions")
     os.makedirs(completion_dir, exist_ok=True)