Restore the fast fail before the baseline build when nothing matched

script/test_build_components.py

@@ -1083,6 +1083,13 @@ def test_components(
         print("No components requested (blank component list)")
         return 1
 
+    if fail_on_no_tests and not all_tests:
+        # Nothing matched at all: fail before the synthetic baseline build,
+        # which would spend a compile reporting success on nothing. Partial
+        # matches defer to the per-pattern accounting after the summary.
+        print(f"No components found matching: {component_patterns}")
+        return 1
+
     if not all_tests:
         print(f"No components found matching: {component_patterns}")
         print(

tests/script/test_test_build_components.py

@@ -302,9 +302,7 @@ def test_components_wildcard_no_match_fails_with_flag(
         fail_on_no_tests=True,
     )
     assert rc == 1
-    assert "No tests ran for requested pattern(s): zz_no_such*" in (
-        capsys.readouterr().out
-    )
+    assert "No components found matching" in capsys.readouterr().out
 
 
 def test_components_empty_match_tolerated_without_flag() -> None:
@@ -332,6 +330,4 @@ def test_components_unknown_component_fails_with_flag(
         fail_on_no_tests=True,
     )
     assert rc == 1
-    assert "No tests ran for requested pattern(s): no_such_component_xyz" in (
-        capsys.readouterr().out
-    )
+    assert "No components found matching" in capsys.readouterr().out