Bug 1382827 - |mach try --artifact| should remove |--artifact| if "-nightly" platforms are requested. r=chmanchester

MozReview-Commit-ID: Dqle5sBlZNr

--HG--
extra : rebase_source : d165af63dc433188fc00e778082572d5f1d35858

testing/tools/autotry/autotry.py

@@ -411,6 +411,11 @@ class AutoTry(object):
         if intersection and not suites:
             raise ValueError("No tests found matching filters")
 
+        if extras.get('artifact') and any([p.endswith("-nightly") for p in platforms]):
+            print('You asked for |--artifact| but "-nightly" platforms don\'t have artifacts. '
+                  'Running without |--artifact| instead.')
+            del extras['artifact'];
+
         if extras.get('artifact'):
             rejected = []
             for suite in suites.keys():