github.com/keybase/client/go@v0.0.0-20241007131713-f10651d043c8/updater/util/error.go (about)

     1  // Copyright 2015 Keybase, Inc. All rights reserved. Use of
     2  // this source code is governed by the included BSD license.
     3  
     4  package util
     5  
     6  import (
     7  	"fmt"
     8  	"strings"
     9  )
    10  
    11  // removeNilErrors returns error slice with nil errors removed
    12  func removeNilErrors(errs []error) []error {
    13  	if len(errs) == 0 {
    14  		return nil
    15  	}
    16  	var r []error
    17  	for _, err := range errs {
    18  		if err != nil {
    19  			r = append(r, err)
    20  		}
    21  	}
    22  	return r
    23  }
    24  
    25  // CombineErrors returns a single error for multiple errors, or nil if none
    26  func CombineErrors(errs ...error) error {
    27  	errs = removeNilErrors(errs)
    28  	if len(errs) == 0 {
    29  		return nil
    30  	} else if len(errs) == 1 {
    31  		return errs[0]
    32  	}
    33  
    34  	// Combine multiple errors
    35  	msgs := []string{}
    36  	for _, err := range errs {
    37  		msgs = append(msgs, err.Error())
    38  	}
    39  	return fmt.Errorf("There were multiple errors: %s", strings.Join(msgs, "; "))
    40  }