feat: remove "scripts." in snakefile (#926)

* feat: remove "scripts." in snakefile

* feat: adjust get_last_commit_message()

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Snakefile

@@ -11,9 +11,9 @@ from shutil import copyfile, move
 
 from snakemake.remote.HTTP import RemoteProvider as HTTPRemoteProvider
 
-from scripts._helpers import create_country_list, get_last_commit_message
-from scripts.build_demand_profiles import get_load_paths_gegis
-from scripts.retrieve_databundle_light import datafiles_retrivedatabundle
+from _helpers import create_country_list, get_last_commit_message
+from build_demand_profiles import get_load_paths_gegis
+from retrieve_databundle_light import datafiles_retrivedatabundle
 from pathlib import Path
 
 HTTP = HTTPRemoteProvider()
@@ -28,7 +28,7 @@ if "config" not in globals() or not config:  # skip when used as sub-workflow
 configfile: "configs/bundle_config.yaml"
 
 
-config.update({"git_commit": get_last_commit_message()})
+config.update({"git_commit": get_last_commit_message(".")})
 
 # convert country list according to the desired region
 config["countries"] = create_country_list(config["countries"])
@@ -1043,7 +1043,7 @@ rule run_scenario:
     resources:
         mem_mb=5000,
     run:
-        from scripts.build_test_configs import create_test_config
+        from build_test_configs import create_test_config
         import yaml
 
         # get base configuration file from diff config

scripts/_helpers.py

@@ -816,21 +816,29 @@ def filter_codes(c_list, iso_coding=True):
     return full_codes_list
 
 
-def get_last_commit_message():
+def get_last_commit_message(path):
     """
-    Function to get the last Git commit message.
+    Function to get the last PyPSA-Earth Git commit message.
 
     Returns
     -------
     result : string
     """
+    _logger = logging.getLogger(__name__)
+    last_commit_message = None
+    backup_cwd = os.getcwd()
     try:
-        result = subprocess.run(
-            ["git", "log", "-1", "--pretty=format:%H %s"],
-            capture_output=True,
-            text=True,
+        os.chdir(path)
+        last_commit_message = (
+            subprocess.check_output(
+                ["git", "log", "-n", "1", "--pretty=format:%H %s"],
+                stderr=subprocess.STDOUT,
+            )
+            .decode()
+            .strip()
         )
-        return result.stdout.strip()
-    except Exception as e:
-        logger.warning(f"Error getting the last commit message: {e}")
-        return ""
+    except subprocess.CalledProcessError as e:
+        _logger.warning(f"Error executing Git: {e}")
+
+    os.chdir(backup_cwd)
+    return last_commit_message