github.com/kovansky/hugo@v0.92.3-0.20220224232819-63076e4ff19f/config/env.go (about)

     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  	parts := strings.SplitN(v, "=", 2)
    45  	return parts[0], parts[1]
    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  }