Update slurmmanager.jl

Author: DilumAluthge

src/slurmmanager.jl

@@ -159,6 +159,23 @@ function warn_if_unexpected_params(params::Dict)
                    # and there is no problem.
                 end
             end
+        elseif k == :custom_worker_flag
+            # We special-case `:custom_worker_flag`, because our support status depends on the Julia version
+            if v == `--worker`
+                # Either the user didn't provide the `:env` kwarg,
+                # or the user provided `custom_worker_flag=`--worker``.
+                #
+                # Either way, in this case, we don't print a log message.
+                # @debug "k == :custom_worker_flag and v == `--worker`" k v
+            else
+                # In this case, the user has provided the `:custom_worker_flag` kwarg, and it is something other than `--worker`.
+                if Base.VERSION < v"1.6.0"
+                   @warn "The user provided the `custom_worker_flag` kwarg, but SlurmClusterManager.jl's support for the `custom_worker_flag` kwarg requires Julia 1.6 or later" Base.VERSION
+                else
+                   # Here, the Julia version is >= 1.6, so we do support `:custom_worker_flag`,
+                   # and there is no problem.
+                end
+            end
         elseif k in params_that_we_support
             # We support this param, so no problem.
         else