env.go (1700B)
1 // Copyright 2019 The Hugo Authors. All rights reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 // http://www.apache.org/licenses/LICENSE-2.0
7 //
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
13
14 package config
15
16 import (
17 "os"
18 "runtime"
19 "strconv"
20 "strings"
21 )
22
23 // GetNumWorkerMultiplier returns the base value used to calculate the number
24 // of workers to use for Hugo's parallel execution.
25 // It returns the value in HUGO_NUMWORKERMULTIPLIER OS env variable if set to a
26 // positive integer, else the number of logical CPUs.
27 func GetNumWorkerMultiplier() int {
28 if gmp := os.Getenv("HUGO_NUMWORKERMULTIPLIER"); gmp != "" {
29 if p, err := strconv.Atoi(gmp); err == nil && p > 0 {
30 return p
31 }
32 }
33 return runtime.NumCPU()
34 }
35
36 // SetEnvVars sets vars on the form key=value in the oldVars slice.
37 func SetEnvVars(oldVars *[]string, keyValues ...string) {
38 for i := 0; i < len(keyValues); i += 2 {
39 setEnvVar(oldVars, keyValues[i], keyValues[i+1])
40 }
41 }
42
43 func SplitEnvVar(v string) (string, string) {
44 name, value, _ := strings.Cut(v, "=")
45 return name, value
46 }
47
48 func setEnvVar(vars *[]string, key, value string) {
49 for i := range *vars {
50 if strings.HasPrefix((*vars)[i], key+"=") {
51 (*vars)[i] = key + "=" + value
52 return
53 }
54 }
55 // New var.
56 *vars = append(*vars, key+"="+value)
57 }