update help for the toolchain argument

install-mpsd-software-environment.py

@@ -26,10 +26,11 @@ config_vars = {
 # Helper class to change directory via context manager
 class os_chdir:
     """
-    The os_chdir class is a context manager that 
-    changes the current directory to a specified directory 
+    The os_chdir class is a context manager that
+    changes the current directory to a specified directory
     and returns to the original directory after execution.
     """
+
     def __init__(self, new_dir):
         self.new_dir = new_dir
         self.saved_dir = os.getcwd()
@@ -83,7 +84,9 @@ def setup_log_cmd(mpsd_release: str, script_dir: str, msg: str = None, *args, **
                         .strip()
                     )
                     script_commit_hash = (
-                        subprocess.run(["git", "rev-parse", "--short", "HEAD"], stdout=subprocess.PIPE).stdout.decode().strip()
+                        subprocess.run(["git", "rev-parse", "--short", "HEAD"], stdout=subprocess.PIPE)
+                        .stdout.decode()
+                        .strip()
                     )
                 # spack-environments branch and commit hash from kwargs
                 spe_branch = kwargs.get("spe_branch", None)
@@ -97,7 +100,7 @@ def setup_log_cmd(mpsd_release: str, script_dir: str, msg: str = None, *args, **
 
 def create_dir_structure(mpsd_release: str, script_dir: Path) -> None:
     """
-    The create_dir_structure function creates the directory structure for the specified release 
+    The create_dir_structure function creates the directory structure for the specified release
     and clones the Spack environments repository if it doesn't exist.
 
     Args:
@@ -185,8 +188,13 @@ def prepare_environment(mpsd_release: str, script_dir: Path) -> List[str]:
     return available_toolchains
 
 
-def install_environment(mpsd_release: str, toolchains: List[str], script_dir: Path, force_reinstall: bool = False,
-                        enable_build_cache: bool = False) -> None:
+def install_environment(
+    mpsd_release: str,
+    toolchains: List[str],
+    script_dir: Path,
+    force_reinstall: bool = False,
+    enable_build_cache: bool = False,
+) -> None:
     """
     Installs the specified MPSD release and toolchains to the specified directory using Spack.
 
@@ -223,7 +231,9 @@ def install_environment(mpsd_release: str, toolchains: List[str], script_dir: Pa
         toolchains = available_toolchains
     elif toolchains == "NONE":
         # No toolchains requested, so we only create the env and print the list of available toolchains
-        print(f"No toolchains requested. Available toolchains for release {mpsd_release} are: \n {available_toolchains}")
+        print(
+            f"No toolchains requested. Available toolchains for release {mpsd_release} are: \n {available_toolchains}"
+        )
         return
 
     for toolchain in toolchains:
@@ -293,7 +303,7 @@ def main():
                     type=str,
                     nargs="+",
                     default="NONE",
-                    help="List of toolchains to install (use ALL to install all toolchains)",
+                    help="List of toolchains to install (use ALL to install all toolchains). If nothing is specified, list of available toolchains for the release would be shown after creating the environment.",
                 )
                 subp.add_argument(
                     "--enable-build-cache",