Force user to pick a tree

Makefile

@@ -12,8 +12,8 @@ help:
 	@echo "  all_tests		to run 'lint', 'unittest', and 'integration'"
 
 lint:
-	@flake8 tedana
 	@black --check --diff tedana
+	@flake8 tedana
 
 unittest:
 	@py.test --skipintegration --cov-append --cov-report term-missing --cov=tedana tedana/

tedana/workflows/tedana.py

@@ -77,6 +77,17 @@ def _get_parser():
         help="Echo times (in ms). E.g., 15.0 39.0 63.0",
         required=True,
     )
+    required.add_argument(
+        "-t",
+        "--tree",
+        dest="tree",
+        help=(
+            "Decision tree to use. You may use a "
+            "packaged tree (kundu, minimal) or supply a JSON "
+            "file which matches the decision tree file "
+            "specification."
+        ),
+    )
     optional.add_argument(
         "--out-dir",
         dest="out_dir",
@@ -153,17 +164,6 @@ def _get_parser():
         ),
         default="aic",
     )
-    optional.add_argument(
-        "--tree",
-        dest="tree",
-        help=(
-            "Decision tree to use. You may use a "
-            "packaged tree (kundu, minimal) or supply a JSON "
-            "file which matches the decision tree file "
-            "specification."
-        ),
-        default="minimal",
-    )
     optional.add_argument(
         "--seed",
         dest="fixed_seed",