Add --no-tests option to skip building and running all tests.

Author: TallJimbo

python/lsst/sconsUtils/scripts.py

@@ -9,7 +9,7 @@
 import warnings
 from stat import ST_MODE
 
-from SCons.Script import BUILD_TARGETS, Dir, File, Glob, SConscript
+from SCons.Script import BUILD_TARGETS, Dir, File, GetOption, Glob, SConscript
 
 from . import dependencies, state, tests, utils
 
@@ -613,6 +613,8 @@ def tests(
         result : ???
             ???
         """
+        if GetOption("no_tests"):
+            return []
         if noBuildList is None:
             noBuildList = []
         if pySingles is None:

python/lsst/sconsUtils/state.py

@@ -119,6 +119,16 @@ def _initOptions():
         default=False,
         help="Do not use EUPS for configuration",
     )
+    SCons.Script.AddOption(
+        "--no-tests",
+        dest="no_tests",
+        action="store_true",
+        default=False,
+        help=(
+            "Do not build or run tests (by clearing the 'tests' target).  "
+            "Library targets in the test directory may still be built."
+        ),
+    )
 
 
 def _initLog():