move the logfile creation into main

mpsd-software-environment.py

@@ -517,8 +517,7 @@ def install_environment(
 
     # Set required variables
     release_base_dir = script_dir / mpsd_release
-    os.environ.get("MPSD_OS", "UNKNOWN_OS")
-    mpsd_microarch = os.environ.get("MPSD_MICROARCH", "UNKNOWN_MICROARCH")
+
     toolchain_dir = release_base_dir / mpsd_microarch
     toolchain_dir.mkdir(parents=True, exist_ok=True)
     spack_setup_script = release_base_dir / "spack-environments" / "spack_setup.sh"
@@ -558,11 +557,7 @@ def install_environment(
             # _mpsd_spack_ver_ with mpsd_release
 
             logging.info(f"Installing toolchain {toolchain} to {toolchain_dir}")
-            install_log_file = (
-                config_vars["build_log_file"]
-                .replace("mpsd_spack_ver_", f"{mpsd_release}_")
-                .replace("_toolchains_", f"_{toolchain}_")
-            )
+
             # log the command
             setup_log_cmd(
                 mpsd_release,
@@ -680,7 +675,16 @@ def main():
     # Carry out the action
     args = parser.parse_args()
 
+    # Get machine configs
+    os.environ.get("MPSD_OS", "UNKNOWN_OS")
+    os.environ.get("MPSD_MICROARCH", "UNKNOWN_MICROARCH")
     # parse logging first
+    # decide the log_file_name
+    (
+        config_vars["build_log_file"]
+        .replace("mpsd_spack_ver_", f"{mpsd_release}_")
+        .replace("_toolchains_", f"_{toolchain}_")
+    )
     set_up_logging(args.loglevel)
 
     # target dir is the place where this script exists. the