Warn about passing globs to unset.

ShellCheck/Checks/Commands.hs

@@ -90,6 +90,7 @@ commandChecks = [
     ,checkExportedExpansions
     ,checkAliasesUsesArgs
     ,checkAliasesExpandEarly
+    ,checkUnsetGlobs
     ]
 
 buildCommandMap :: [CommandCheck] -> Map.Map CommandName (Token -> Analysis)
@@ -589,5 +590,14 @@ checkAliasesExpandEarly = CommandCheck (Exactly "alias") (f . arguments)
     checkArg _ = return ()
 
 
+prop_checkUnsetGlobs1 = verify checkUnsetGlobs "unset foo[1]"
+prop_checkUnsetGlobs2 = verifyNot checkUnsetGlobs "unset foo"
+checkUnsetGlobs = CommandCheck (Exactly "unset") (mapM_ check . arguments)
+  where
+    check arg =
+        when (isGlob arg) $
+            warn (getId arg) 2184 "Quote arguments to unset so they're not glob expanded."
+
+
 return []
 runTests =  $( [| $(forAllProperties) (quickCheckWithResult (stdArgs { maxSuccess = 1 }) ) |])