github.com/OpsMx/go-app-base@v0.0.24/util/util.go (about)

     1  // Copyright 2022 OpsMx, Inc
     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  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package util
    16  
    17  import (
    18  	"log"
    19  	"os"
    20  )
    21  
    22  // Check will log an error using log.Fatal() if err is not nil, otherwise
    23  // nothing happens.
    24  func Check(err error) {
    25  	if err != nil {
    26  		log.Fatal(err)
    27  	}
    28  }
    29  
    30  // GetEnvar will return the envar if set, otherwise the default string provided.
    31  func GetEnvar(name string, defaultValue string) string {
    32  	value, found := os.LookupEnv(name)
    33  	if !found {
    34  		return defaultValue
    35  	}
    36  	return value
    37  }
    38  
    39  // Contains looks inside a slice to see if a specific element exists.
    40  // This is not fast, and intended only when the length of the slice
    41  // is small as a linear search is used.
    42  func Contains[T comparable](elems []T, v T) bool {
    43  	for _, s := range elems {
    44  		if v == s {
    45  			return true
    46  		}
    47  	}
    48  	return false
    49  }