Merge pull request #113 from dentonmwood/master

Added better error messages to CLI

Author: dentonmwood

engine/algorithms/algorithm_runner.py

@@ -26,6 +26,8 @@ def run_single_repo(modules, algorithm):
         return oxygen(modules)
     elif algorithm == CHLORINE:
         return chlorine_single_repo(modules)
+    elif algorithm == IODINE:
+        raise UserInputError(f"\"{algorithm}\" can only be run with two repositories")
     else:
         raise UserInputError(f"Invalid algorithm name: \"{algorithm}\"")
 
@@ -50,5 +52,7 @@ def run_two_repos(modules1, modules2, algorithm):
         return chlorine_two_repos(modules1, modules2)
     elif algorithm == IODINE:
         return iodine(modules1, modules2)
+    elif algorithm == OXYGEN:
+        raise UserInputError(f"\"{algorithm}\" can only be run with one repository")
     else:
         raise UserInputError(f"Invalid algorithm name: \"{algorithm}\"")