print out fact version + git hash on start

Author: jstucke

src/fact_base.py

@@ -1,18 +1,22 @@
 import logging
 import os
 import signal
+import sys
+from pathlib import Path
 from time import sleep
 
 import config
 
 try:
+    import git
     import psutil
     import psycopg2  # noqa: F401
 
     from helperFunctions.program_setup import setup_argparser, setup_logging
     from statistic.work_load import WorkLoadStatistic
     from storage.db_interface_base import DbInterfaceError
     from storage.migration import db_needs_migration
+    from version import __VERSION__
 except (ImportError, ModuleNotFoundError):
     logging.exception(
         'Could not load dependencies. Please make sure that you have installed FACT correctly '
@@ -37,11 +41,23 @@ def __init__(self):
         self.args = setup_argparser(self.PROGRAM_NAME, self.PROGRAM_DESCRIPTION)
         config.load(self.args.config_file)
         setup_logging(self.args, self.COMPONENT)
+        python_version, *_ = sys.version.split(' ')
+        logging.info(
+            f'Starting {self.PROGRAM_NAME} @ {__VERSION__} ({self._get_git_revision()}, Python {python_version})'
+        )
         self.do_self_test()
 
         self._register_signal_handlers()
         self.work_load_stat = WorkLoadStatistic(component=self.COMPONENT)
 
+    @staticmethod
+    def _get_git_revision() -> str:
+        try:
+            repo = git.Repo(Path(__file__), search_parent_directories=True)
+            return f'commit {repo.head.object.hexsha}'
+        except git.exc.InvalidGitRepositoryError:
+            return 'unknown revision'
+
     def _register_signal_handlers(self):
         # Check whether the process was started by start_fact.py
         parent = ' '.join(psutil.Process(os.getppid()).cmdline())

src/install/requirements_common.txt

@@ -7,6 +7,7 @@ setuptools<66
 # General python dependencies
 appdirs==1.4.4
 flaky==3.7.0
+gitpython~=3.1.40
 lief==0.12.3
 psutil==5.9.4
 psycopg2-binary==2.9.5