override configuration file via command buildtest build -c

buildtest/config.py

@@ -12,6 +12,7 @@
 from buildtest.schemas.utils import load_schema, load_recipe
 from buildtest.system import Slurm, LSF, Cobalt, system
 from buildtest.utils.command import BuildTestCommand
+from buildtest.utils.file import resolve_path
 from buildtest.utils.tools import deep_get
 from buildtest.exceptions import BuildTestError
 
@@ -274,12 +275,16 @@ def load_settings(settings_path=None):
     return load_recipe(settings_path)
 
 
-def resolve_settings_file():
+def resolve_settings_file(settings_path=None):
     """Returns path to buildtest settings file that should be used. If there
     is a user defined buildtest settings ($HOME/.buildtest/config.yml) it will
     be honored, otherwise default settings from buildtest will be used.
     """
 
+    if settings_path:
+        settings_path = resolve_path(settings_path)
+        return settings_path
+
     # if buildtest settings file exist return it otherwise return default file
     if os.path.exists(USER_SETTINGS_FILE):
         return USER_SETTINGS_FILE

buildtest/main.py

@@ -45,9 +45,12 @@ def main():
     if args.debug:
         streamlog(args.debug)
 
-    # invoking load_settings will attempt to initialize buildtest settings and
-    # load the schema
-    settings_file = resolve_settings_file()
+    # resolve_settings_file will resolve settings file for buildtest in the following order:
+    # 1. Command Line:  'buildtest build -c config.yml'
+    # 2. User Configuration:  $HOME/.buildtest/config.yml
+    # 3. Default Settings:  $BUILDTEST_ROOT/buildtest/settings/config.yml
+    settings_file = resolve_settings_file(args.config)
+
     logger.info(f"Processing buildtest configuration file: {settings_file}")
     check_settings(settings_file)
 

buildtest/menu/__init__.py

@@ -201,6 +201,9 @@ def build_menu(self):
             type=positive_number,
             help="Rebuild test X number of times. Must be a positive number between [1-50]",
         )
+        parser_build.add_argument(
+            "-c", "--config", help="Specify path to buildtest configuration file"
+        )
 
     def buildspec_menu(self):
         """This method implements ``buildtest buildspec`` command"""