1 files changed, 33 insertions, 0 deletions
diff --git a/config/env.go b/config/env.go
new file mode 100644
index 000000000..adf6f9b68
--- /dev/null
+++ b/config/env.go
@@ -0,0 +1,33 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"os"
+	"runtime"
+	"strconv"
+)
+
+// GetNumWorkerMultiplier returns the base value used to calculate the number
+// of workers to use for Hugo's parallel execution.
+// It returns the value in HUGO_NUMWORKERMULTIPLIER OS env variable if set to a
+// positive integer, else the number of logical CPUs.
+func GetNumWorkerMultiplier() int {
+	if gmp := os.Getenv("HUGO_NUMWORKERMULTIPLIER"); gmp != "" {
+		if p, err := strconv.Atoi(gmp); err == nil && p > 0 {
+			return p
+		}
+	}
+	return runtime.NumCPU()
+}