Restructure log location

Resolves #7 (closed)

mpsd-software-environment.py

@@ -12,7 +12,6 @@ import time
 from pathlib import Path
 from typing import List, Tuple, Union
 import re
-from string import Template
 
 # If 'rich' is available ("pip install rich" or "apt-get install python3-rich"),
 # then use coloured output, otherwise proceed as before
@@ -38,14 +37,7 @@ call_date_iso = (
 config_vars = {
     #  kept inside the mpsd_release folder
     "cmd_log_file": "script_execution_summary.log",
-    #  Placeholder installer log file name, placed at mpsd_microarch/logs
-    "installer_log_template": Template(
-        "${mpsd_release}_${mpsd_microarch}_${date}_APEX_${action}.log"
-    ),
-    #  Placeholder build log file name, placed at mpsd_microarch/logs
-    "build_log_template": Template(
-        "${mpsd_release}_${mpsd_microarch}_${date}_BUILD_${toolchain}_${action}.log"
-    ),
+    #  Metadata tags
     "metadata_tag_open": "!<meta>",
     "metadata_tag_close": "</meta>!",
     "spack_environments_repo": "https://gitlab.gwdg.de/mpsd-cs/spack-environments.git",
@@ -58,17 +50,17 @@ def create_log_file_names(
     action: str,
     date: str = call_date_iso,
     toolchain: str = None,
-) -> Tuple[str, str]:
+) -> Union[str, None]:
     """Create log file names.
 
-    This function creates the log file names for the installer and
+    This function creates the log file names for either the installer or
     the build log files.
-    The installer log file is created
-    from the output of this script except
-    the toolchain build log that is handled by the spack_setup.sh script.
-    The build log `tee`'s the output of the spack_setup.sh script to the log file.
-    The log file names are created using the
-    template strings defined in config_vars.
+
+    If a toolchain is given, then the build log file name is created.
+    if no toolchain is given, then the installer log file name is created.
+    The installer log file hosts the logs of the installer script, while
+    the build log file hosts the logs of the build process as generated by the
+    spack_setup.sh script.
 
     Parameters
     ----------
@@ -83,27 +75,29 @@ def create_log_file_names(
         only install and remove are valid for build log file.
     toolchain : str
         toolchain name (only for build log file)
-    returns : tuple
-        tuple containing installer_log_file, build_log_file, file names
+
+    Returns
+    -------
+    str or None
+        log file name
+        installer_log_file_name or build_log_file_name depending on the
+        parameters given.
+        If the action is not one that changes the files on disk ( info only actions)
+        then None is returned.
     """
-    installer_log_file = config_vars["installer_log_template"].substitute(
-        mpsd_release=mpsd_release,
-        mpsd_microarch=mpsd_microarch,
-        date=date,
-        action=action,
-    )
-    if toolchain and action in ["install", "remove"]:
-        build_log_file = config_vars["build_log_template"].substitute(
-            mpsd_release=mpsd_release,
-            mpsd_microarch=mpsd_microarch,
-            date=date,
-            action=action,
-            toolchain=toolchain,
-        )
+    if toolchain:
+        # if toolchain is given, then  we build the build_log_file_name
+        if action in ["install", "remove"]:
+            log_file_name = (
+                f"{mpsd_release}_{mpsd_microarch}_{date}_BUILD_{toolchain}_{action}.log"
+            )
+        else:
+            return None
     else:
-        build_log_file = None
-        logging.warning("Incorrect action or toolchain name.")
-    return installer_log_file, build_log_file
+        # if toolchain is not given, then we build the installer_log_file_name
+        log_file_name = f"{mpsd_release}_{mpsd_microarch}_{date}_APEX_{action}.log"
+
+    return log_file_name
 
 
 def log_metadata(key: str, value: str) -> None:
@@ -160,7 +154,7 @@ def get_installer_log_file_path(mpsd_release: str, cmd: str, script_dir: str) ->
     mpsd_microarch = get_native_microarchitecture()
     # parse logging first
     # decide the log_file_name
-    installer_log_name, build_log_name = create_log_file_names(
+    installer_log_name = create_log_file_names(
         mpsd_release=mpsd_release, mpsd_microarch=mpsd_microarch, action=cmd
     )
     log_folder = script_dir / mpsd_release / "logs"
@@ -786,7 +780,7 @@ def install_environment(
             os.mkdir("logs")
         for toolchain in toolchains:
             # Set the install log file name from create_log_file_names
-            _, build_log_file_name = create_log_file_names(
+            build_log_file_name = create_log_file_names(
                 mpsd_release, mpsd_microarch, "install", toolchain=toolchain
             )
             build_log_folder = release_base_dir / "logs"